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Jiao X, Huang D, Zhao S, Ouyang J. Study on the Compatibility of SBR and Asphalt Base Based on Molecular Simulation. Materials (Basel) 2024; 17:1175. [PMID: 38473646 DOI: 10.3390/ma17051175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024]
Abstract
In the field of highway construction, the application of styrene-butadiene rubber (SBR)-modified asphalt has gained popularity across different levels of road surfaces. A crucial aspect in ensuring the efficacy of this modification lies in the compatibility between SBR and the matrix asphalt. To address this, the current study utilizes molecular dynamics simulation as a technique. By establishing a model for the SBR-modified asphalt mixture, the research quantifies the compatibility level between the SBR modifier and the asphalt. The aim is to uncover the underlying mechanisms of compatibility between the SBR modifier and the base asphalt, ultimately contributing to the improvement of the storage stability of SBR-modified asphalt, which holds significant importance. The investigation began with the creation of models for both the base asphalt and the SBR modifier. A model for the SBR-modified asphalt blending system was then formulated based on these initial models. After undergoing geometry optimization and annealing procedures, the model attained its lowest energy state, providing a reliable basis for examining the performance of SBR-modified asphalt. The study proceeded to calculate solubility parameters and interaction energies of the system to evaluate the compatibility between the SBR modifier and the base asphalt at various temperatures. The analysis of these parameters shed light on the compatibility mechanism between the two components. Notably, it was found that at a temperature of 160 ℃, the compatibility was significantly enhanced. The findings were further corroborated through scanning electron microscope and rheological tests. The outcomes of this research offer theoretical guidance for the application of SBR-modified asphalt.
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Affiliation(s)
- Xiaolei Jiao
- Tianjin Highway Development Service Center, Tianjin 300170, China
| | - Dandan Huang
- Tianjin GUOTENG Highway Consultation & PROJECT Management CO., Ltd., Tianjin 300170, China
| | - Song Zhao
- School of Civil Engineering and Transportation, Northeast Forestry University, Harbin 150040, China
| | - Jian Ouyang
- School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China
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2
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Zhang Q, Hou D, Li Z, Wang H, Dong S. Evaluation of the Thermal Stability and Micro-Modification Mechanism of SBR/PP- Modified Asphalt. Polymers (Basel) 2024; 16:456. [PMID: 38399834 PMCID: PMC10892095 DOI: 10.3390/polym16040456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/02/2024] [Accepted: 01/04/2024] [Indexed: 02/25/2024] Open
Abstract
To evaluate the thermal stability of composite polymer-modified asphalt, thermoplastic elastomer styrene-butadiene rubber (SBR)/polypropylene (PP) pellets were prepared using a hot-melt blending technique, with butyl rubber powder and waste polypropylene pellets as raw materials. The effects of different evaluation indexes on the thermal stability of SBR/PP-modified asphalt were investigated using a frequency scan test and a multi-stress creep recovery (MSCR) test, and the compatibility of SBR/PP particles with asphalt was studied using the Cole-Cole diagram and microstructure images. The tests show that, firstly, the performance grade (PG) classification of asphalt can be improved by adding an SBR/PP thermoplastic elastomer to enhance the adaptability of asphalt in high- and low-temperature environments, and the evaluation separation index can reflect the high-temperature storage stability of composite-modified asphalt more reasonably. Additionally, the larger the rubber-to-plastic ratio the worse the high-temperature thermal stability of composite-modified asphalt. Moreover, the addition of additives to the composite particles can promote the SBR/PP particles in the asphalt to be more uniformly dispersed, forming a more desirable microstructure and improving the thermal stability of composite-modified asphalt. Ultimately, the semicircular curve of the Cole-Cole diagram can reflect the compatibility characteristics of the two-phase structure of SBR/PP-modified asphalt, which can be used as an auxiliary index to evaluate the compatibility of polymer-modified asphalt.
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Affiliation(s)
- Qing Zhang
- Henan Key Laboratory of High-Grade Highway Detection and Maintenance Technology, Xinxiang 453003, China; (Q.Z.); (D.H.); (Z.L.)
- National Engineering Research Center of Highway Maintenance Equipment, Xinxiang 453003, China
- Collaborative Innovation Center of Henan Province for Fine Chemicals Green Manufacturing, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Dehua Hou
- Henan Key Laboratory of High-Grade Highway Detection and Maintenance Technology, Xinxiang 453003, China; (Q.Z.); (D.H.); (Z.L.)
- National Engineering Research Center of Highway Maintenance Equipment, Xinxiang 453003, China
| | - Zhongyu Li
- Henan Key Laboratory of High-Grade Highway Detection and Maintenance Technology, Xinxiang 453003, China; (Q.Z.); (D.H.); (Z.L.)
- National Engineering Research Center of Highway Maintenance Equipment, Xinxiang 453003, China
| | - Hainian Wang
- School of Highway, Chang’an University, Xi’an 710064, China;
| | - Shi Dong
- Henan Key Laboratory of High-Grade Highway Detection and Maintenance Technology, Xinxiang 453003, China; (Q.Z.); (D.H.); (Z.L.)
- National Engineering Research Center of Highway Maintenance Equipment, Xinxiang 453003, China
- College of Transportation Engineering, Chang’an University, Xi’an 710064, China
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Dai Z, Sun J, Liu J, Lv K, Zhang X, Wang Z, Xu Z. Study on the Inhibition Mechanism of Hydration Expansion of Yunnan Gas Shale using Modified Asphalt. Materials (Basel) 2024; 17:645. [PMID: 38591478 PMCID: PMC10856663 DOI: 10.3390/ma17030645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/18/2024] [Accepted: 01/26/2024] [Indexed: 04/10/2024]
Abstract
Drilling fluids play an essential role in shale gas development. It is not possible to scale up the use of water-based drilling fluid in shale gas drilling in Yunnan, China, because conventional inhibitors cannot effectively inhibit the hydration of the illite-rich shale formed. In this study, the inhibition performance of modified asphalt was evaluated using the plugging test, expansion test, shale recovery experiment, and rock compressive strength test. The experimental results show that in a 3% modified asphalt solution, the expansion of shale is reduced by 56.3%, the recovery is as high as 97.8%, water absorption is reduced by 24.3%, and the compression resistance is doubled compared with those in water. Moreover, the modified asphalt can effectively reduce the fluid loss of the drilling fluid. Modified asphalt can form a hydrophobic membrane through a large amount of adsorption on the shale surface, consequently inhibiting shale hydration. Simultaneously, modified asphalt can reduce the entrance of water into the shale through blocking pores, micro-cracks, and cracks and further inhibit the hydration expansion of shale. This demonstrates that modified asphalt will be an ideal choice for drilling shale gas formations in Yunnan through water-based drilling fluids.
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Affiliation(s)
- Zhiwen Dai
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Jinsheng Sun
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- CNPC Engineering Technology R&D Company Limited, Beijing 102206, China
| | - Jingping Liu
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Kaihe Lv
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xianfa Zhang
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Zonglun Wang
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Zhe Xu
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
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Zhao W, Sun X, Ou Z, Li Z, Liu Z, Qin X. Modifying Effect and Mechanism of Polymer Powder on the Properties of Asphalt Binder for Engineering Application. Polymers (Basel) 2023; 15:4659. [PMID: 38139911 PMCID: PMC10747318 DOI: 10.3390/polym15244659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/24/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
For achieving the better modifying effect of polyurethane on asphalt pavement materials, the PUA powder modifier was prepared with fine grinding at the glass transition temperature, and polyurethane-modified asphalt (PUA-MA) with different dosages of modifier was prepared. The impact of the PUA on the physical properties of asphalt binder was studied. The modifying mechanism of PUA on asphalt was explored by investigating the thermal performance and chemical composition of asphalt (thermogravimetric analysis, differential scanning calorimetry test, and Fourier transform infrared spectroscopy). The micrograph of the interactive interface was characterized by scanning an electron microscope. Furthermore, the rheological properties of PUA-MA were also investigated and analyzed. The results indicated that the PUA had a dense structure with few pores on the surface. After mixing with asphalt, it altered the asphalt's internal structure via physical fusion and chemical reaction (carbamate formation). PUA improved the thermal stability of asphalt, enhanced the asphalt's thermal decomposition temperature, and further reduced the thermal mass loss while decreasing the glass transition temperature. The addition and dosage increase in the PUA modifier significantly improved the softening point, viscosity, complex shear modulus, and rutting factor of asphalt. Also, the PUA could improve the elastic recovery ability of asphalt and enhance the rutting resistance of asphalt at high temperatures. However, the crack resistance at low temperatures was not effectively improved (ductility and penetration decreased). When the dosage was 6-9%, PUA-MA had the best high-temperature performance, but asphalt showed poor low-temperature performance at this dosage. This study provides a theoretical reference for popularizing and applying polyurethane as an asphalt modifier in road engineering.
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Affiliation(s)
- Wensheng Zhao
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China; (W.Z.); (X.S.)
- School of Traffic & Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Xiaolong Sun
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China; (W.Z.); (X.S.)
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China; (Z.O.); (Z.L.)
| | - Zhixin Ou
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China; (Z.O.); (Z.L.)
| | - Zhijian Li
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China; (Z.O.); (Z.L.)
| | - Zhisheng Liu
- Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China;
| | - Xiao Qin
- School of Transportation and Civil Engineering and Architecture, Foshan University, Foshan 528000, China
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Qian J, Dong F, Chen X, Xu X, Zhang D, Li F, Gao Y, Sun H, Pang L, Tang X, Wang D. Facile Preparation of Polysiloxane- Modified Asphalt Binder Exhibiting Enhanced Performance. Polymers (Basel) 2023; 15:3795. [PMID: 37765649 PMCID: PMC10536769 DOI: 10.3390/polym15183795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/02/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
The development of polymer-modified asphalt (asphalt = asphalt binder) is significant because the polymer modifier can improve the performance of asphalt mixture and meet the requirements of the modern asphalt pavement. Herein, we present a novel polysiloxane-modified asphalt with enhanced performance, formed by simply mixing hydroxy-terminated polysiloxane (HO-PDMS) into base asphalt at 140 °C. The interaction mechanism of HO-PDMS in base asphalt was characterized by FT-IR, GPC, and DSC. It reveals that HO-PDMS polymers have been chemically bonded into the asphalt, and, thus, the resultant asphalt exhibits optimal compatibility and storage stability. The results based on fluorescence microscopy and a segregation test prove that HO-PDMS has good compatibility with base asphalt. Moreover, by virtue of the intriguing properties of polysiloxane, the present asphalt possesses improved low- and high-temperature properties, higher thermal stability, and enhanced hydrophobicity compared to conventional asphalt when using an appropriate dosage of HO-PDMS. DSC indicated that the Tg of modified asphalt (-12.8 °C) was obviously lower than that of base asphalt (-7.1 °C). DSR shows that the rutting parameter of modified asphalt was obviously higher than that of base asphalt. BBR shows that modified asphalt exhibited the lowest stiffness modulus and the highest creep rate with an HO-PDMS dosage of 6% and 4%, respectively. These results demonstrate that polysiloxane-modified asphalt can be promisingly utilized in realistic asphalt pavement with specific requirements, particularly high-/low-temperature resistance.
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Affiliation(s)
- Jinhua Qian
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Fuying Dong
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Xiaohui Chen
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Xianying Xu
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Dongkang Zhang
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Fulong Li
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Yuxia Gao
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Huadong Sun
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Laixue Pang
- School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Xinde Tang
- Institute of Intelligent Transportation, Shandong Jiaotong University, Jinan 250357, China
| | - Dengxu Wang
- National Engineering Research Center for Colloidal Materials & Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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6
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Li E, Xu W, Zhang Y. Performance Study of Waste PE-Modified High-Grade Asphalt. Polymers (Basel) 2023; 15:3200. [PMID: 37571094 PMCID: PMC10422315 DOI: 10.3390/polym15153200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
In this work, waste polyethylene (PE)-modified 90# asphalt was made in order to investigate the performance of waste polyethylene-modified high-grade asphalt and the optimal blending quantity. Dynamic Shear Rheology (DSR) and Bending Beam Rheometer (BBR) tests were used to evaluate the high- and low-temperature performance of modified 90# PE-modified asphalt. Infrared spectroscopy and fluorescence microscopy were used to investigate the modification process and distribution status of waste PE in 90# asphalt. The DSR and BBR tests revealed that waste PE enhanced the high-temperature performance of 90# base asphalt and that 5% was the best blending rate. However, the change affects asphalt's low-temperature performance, and the negative effect on asphalt's low-temperature performance was minimized at 1% dosing. The incorporation of waste PE absorbed the light components of asphalt, while waste PE can form a reticulated structure in asphalt, which improves its high-temperature performance but degrades its low-temperature performance, according to the results of infrared spectroscopy and fluorescence microscopy.
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Affiliation(s)
- Erda Li
- College of Civil Engineering, Northeast Forestry University, Harbin 150040, China
| | - Wenyuan Xu
- College of Civil Engineering, Northeast Forestry University, Harbin 150040, China
| | - Yang Zhang
- Heilongjiang Provincial Transportation Investment Group, Harbin 150036, China
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7
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Xie Y, Yu P, Zhai M. Analysis of Nano-ZnO- Modified Asphalt Compatibility Based on Molecular Dynamics. Materials (Basel) 2023; 16:4710. [PMID: 37445028 DOI: 10.3390/ma16134710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023]
Abstract
Nano-ZnO has a large specific surface area, small particle size, and strong polarity and can be used as an additive to modify the base asphalt. In this paper, the compatibility mechanism between nano-ZnO modifier and asphalt is analyzed. Solubility parameters, interaction energNano-ZnO and mean square displacement of nano-ZnO in matrix asphalt were calculated at different temperatures to study the compatibility of the nano-ZnO modifier and the matrix asphalt. The radial distribution functions and radii of gyration of the asphalt's four components under the action of the nano-ZnO additive were calculated to investigate the effect of nano-ZnO on the molecular structure of the asphalt. The results show that the best compatibility between nano-ZnO and matrix asphalt is observed at 150 °C, especially when the nano-ZnO particle size was 6 Å. The particle sizes of nano-ZnO have little effect on the temperature at which the nano-ZnO-modified asphalt achieved its highest structural stability. Around 150 °C, the nano-ZnO-modified asphalt system with different particle sizes exhibit the highest stability and best compatibility. The addition of nano-ZnO improves the compactness of the asphalt structure and makes the asphalt more stable.
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Affiliation(s)
- Yunlan Xie
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Pandeng Yu
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Ming Zhai
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
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He Y, Yi J, Huang T. Study on Rheological and Mechanical Properties of Rock-Compound-Additive- Modified Asphalt and Its Mixture. Materials (Basel) 2023; 16:ma16103771. [PMID: 37241399 DOI: 10.3390/ma16103771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023]
Abstract
Rutting is one of the most widespread and severe diseases in the service life of asphalt pavement. Enhancing the high-temperature rheological properties of pavement materials is one of the valid measures that can be used to solve rutting disease. In this research, the laboratory tests were carried out to compare the rheological properties of the different asphalts (including neat asphalt (NA), styrene-butadiene-styrene asphalt (SA), polyethylene asphalt (EA), and rock-compound-additive-modified asphalt (RCA)). Then, the mechanical behaviors of different asphalt mixtures were investigated. The results show that the rheological properties of modified asphalt with a 15% rock compound additive performed better compared with the other forms of modified asphalt. The dynamic shear modulus of 15% RCA is significantly higher than the other three asphalt binders, which is 8.2 times, 8.6 times, and 14.3 times that of the NA, SA, and EA at a temperature of 40 °C, respectively. After adding the rock compound additive, the compressive strength, splitting strength, and fatigue life of the asphalt mixtures were significantly enhanced. The results of this research have practical significance for new materials and structures to improve asphalt pavement resistance to rutting.
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Affiliation(s)
- Yanbing He
- Hunan Expressway Group Co., Ltd., Changsha 410008, China
- College of Civil Engineering, Central South University of Forestry & Technology, Changsha 410004, China
| | - Jin Yi
- College of Civil Engineering, Central South University of Forestry & Technology, Changsha 410004, China
| | - Tuo Huang
- National Engineering Laboratory for Highway Maintenance Technology, School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China
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Xia L, Cao D, Zhang H. Rheological and Aging Properties of Vegetable Oil-Based Polyurethane (V-PU) Modified Asphalt. Polymers (Basel) 2023; 15:polym15092158. [PMID: 37177304 PMCID: PMC10181481 DOI: 10.3390/polym15092158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/19/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
To study the rheological and aging properties of vegetable oil-based polyurethane (V-PU) modified asphalt, V-PU terminated with an -NCO group was synthesized from renewable castor oil, and liquefied MDI-100LL and 10-40 wt% V-PU modified asphalts were prepared. Temperature classification, multiple stress creep recovery (MSCR), and linear amplitude scanning (LAS) tests were carried out. The results showed that the modulus, the creep recovery rate (R), and the yield stress and yield strain of the V-PU modified asphalts significantly increased in the order: 0 wt% < 10 wt% < 20 wt% < 40 wt% < 30 wt%, while the phase angle and the unrecoverable creep compliance (Jnr) changed in the opposite order, and the high temperature grade of 30 wt% V-PU modified asphalt was 4 grades higher than that of the base asphalt, which indicated that the addition of V-PU enhanced the fatigue, permanent deformation, and recovery deformation resistance. The 30 wt% sample exhibited phase inversion had the best performance. Comprehensive FTIR, GPC, and fluorescence microscopy analyses showed that the molecular weight significantly increased and the V-PU molecules agglomerated after aging. The excess -NCO groups of V-PU prepolymer react with water in the air and the active hydrogen in the asphalt system and finally form a cross-linked three-dimensional network structure with the asphalt to improve performance. The mechanism of intramolecular cementation reaction and the aging process of V-PU modified asphalt was creatively derived.
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Affiliation(s)
- Lei Xia
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China
- China-Road Transportation Verification & Inspection Hi-Tech Co., Ltd., RIOH, Beijing 100088, China
| | - Dongwei Cao
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China
- China-Road Transportation Verification & Inspection Hi-Tech Co., Ltd., RIOH, Beijing 100088, China
| | - Hongliang Zhang
- Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China
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Luo Y, Zhang K. Review on Performance of Asphalt and Asphalt Mixture with Waste Cooking Oil. Materials (Basel) 2023; 16:1341. [PMID: 36836971 PMCID: PMC9965389 DOI: 10.3390/ma16041341] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/20/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
To make full use of the regenerative value of waste cooking oil, and to solve the environmental pollution and food security issues caused by waste cooking oil, waste cooking oil was suggested for use in asphalt. Waste cooking oil was used to adjust the performance of virgin and aged asphalt. This review article summarizes research progress on the performance of asphalt and asphalt mixture with waste cooking oil. The results showed that a moderate dosage of waste cooking oil will improved the low-temperature performance and construction workability of petroleum asphalt and aged asphalt. The mixing and compaction temperature of asphalt mixture with waste cooking oil are reduced by up to 15 °C. The rutting resistance and fatigue resistance of modified asphalt and modified asphalt mixture with waste cooking oil are damaged. After the addition of waste cooking oil in aged asphalt, the high-temperature performance and shear rheologic property of aged asphalt will be recovered. The regeneration effect of waste cooking oil on aged asphalt and aged asphalt mixture is close to that of a traditional regeneration agent, and the partial performance of asphalt or asphalt mixture with waste cooking oil is better. There is no chemical reaction between waste cooking oil and asphalt, but the asphalt component and absorption peak intensity of partial functional groups are changed. The light components content of asphalt binder is usually increased. Further research regarding the engineering application of asphalt mixture with waste cooking oil should be conducted. The method for improving the performance of asphalt and asphalt mixture with waste cooking oil will be mainly researched.
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Affiliation(s)
- Yaofei Luo
- School of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450046, China
| | - Ke Zhang
- College of Information Engineering, Fuyang Normal University, Fuyang 236041, China
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11
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Gan X, Chen P, Yu B, Zhang W. Study on the Performances of Waste Battery Powder Modified Asphalt and Asphalt Mixture. Polymers (Basel) 2022; 14. [PMID: 36559774 DOI: 10.3390/polym14245409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
As an asphalt modifier, waste battery powder (WBP) has been proven to be possible. This paper studies the modification effect of WBP on asphalt. The Flight Test Instrumentation Requirements (FITR) of WBP, Dynamic Shear Rheology (DSR) test, and Full Section Fracture Energy Test (FSFET) of asphalt are carried out. The high-temperature rheological properties and low-temperature properties of WBP modified asphalt are analyzed. The high-temperature stability, low-temperature crack resistance and water stability of WBP modified asphalt mixture are tested. The research results show that the modification of asphalt by WBP is essentially physical modification but the mixing of WBP has a certain enhancement effect on the bond energy of the methylene group, which is helpful to improve the technical performance of modified asphalt. The proportion of elastic components in asphalt can be significantly increased by adding WBP, thus enhancing the deformation resistance of asphalt under high-temperature conditions. The dynamic shear modulus of 10% waste battery powder is about 1.5-2.0 times that of 0% waste battery powder. The mixing of WBP reduces the proportion of viscous components in asphalt which is unfavorable to the crack resistance under low temperatures. The greater the amount of WBP, the smaller the fracture energy density, the content of WBP is 6% and 10%, the fracture energy density is about 60-80% and 40-60% of the original asphalt, and the low temperature cracking resistance of asphalt decreases. The modification effect of WBP on asphalt is much lower than that of SBS.
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12
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Wang L, Li X, Shen J, Li J, Wang W. Aging Characterizations of Modified Asphalt Binders Based on Low Field Nuclear Magnetic Resonance (LF-NMR). Materials (Basel) 2022; 15:8224. [PMID: 36431709 PMCID: PMC9699286 DOI: 10.3390/ma15228224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/09/2022] [Accepted: 11/18/2022] [Indexed: 06/16/2023]
Abstract
Styrene-butadiene-styrene block copolymer (SBS) and crumb rubber modifier (CRM) are commonly used modifiers to modify asphalt binders. The aging of modified asphalt binders is an important factor affecting their performance. In this paper, the effects of the two modifiers (i.e., SBS, CRM) on the aging of modified asphalt binders were studied by using low field nuclear magnetic resonance (LF-NMR) technology and dynamic shear rheological (DSR) tests. Test results showed that when T2, a parameter of relaxation time from NMR test, was within 2.2 milliseconds, the relaxation peak of both modified and unmodified asphalt binders tested showed two peaks (i.e., "M" shape), and when it was greater than 2 milliseconds, extra peaks appeared only in the modified asphalts. These extra peaks gradually disappeared with increased aging; the modifiers carried signal intensities of their own. The addition of a modifier changes the law of "the greater the viscosity of asphalt, the shorter the T2 relaxation time". With the aging process, the normalized peak area (NPA) from NMR decreased, and rutting resistance factor from DSR increased. However, the NPA of modified asphalt increased after the PAV test, which may be related to the change of H semaphore. The rheological properties of the asphalt binders before and after aging were well-correlated with the NPA of T2.
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Affiliation(s)
- Lili Wang
- Suzhou Sanchuang Pavement Engineering Co., Ltd., Suzhou 215011, China
| | - Xinsheng Li
- Jiangsu Provincial Center of Ecological Road Technology Industrialization and Research, Suzhou University of Science and Technology, Suzhou 215011, China
| | - Junan Shen
- Department of Civil Engineering and Construction, Georgia Southern University, Statesboro, GA 30458, USA
| | - Jing Li
- Jiangsu Provincial Center of Ecological Road Technology Industrialization and Research, Suzhou University of Science and Technology, Suzhou 215011, China
| | - Wei Wang
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
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Li Y, Hui B, Yang X, Wang H, Xu N, Feng P, Ma Z, Wang H. Multi-Scale Characterization of High-Temperature Properties and Thermal Storage Stability Performance of Discarded-Mask- Modified Asphalt. Materials (Basel) 2022; 15:7593. [PMID: 36363185 PMCID: PMC9654420 DOI: 10.3390/ma15217593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 10/23/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
In the context of the global pandemic of COVID-19, the use and disposal of medical masks have created a series of ethical and environmental issues. The purpose of this paper is to study and evaluate the high temperature properties and thermal storage stability of discarded-mask (DM)-modified asphalt from a multi-scale perspective using molecular dynamics (MD) simulation and experimental methods. A series of tests was conducted to evaluate the physical, rheological, thermal storage stability and microscopic properties of the samples. These tests include softening point, rotational viscosity, dynamic shear rheology (DSR), Fourier transform infrared (FT-IR) spectroscopy and molecular dynamics simulation. The results showed that the DM modifier could improve the softening point, rotational viscosity and rutting factor of the asphalt. After thermal storage, the DM-modified asphalt produced segregation. The difference in the softening point between the top and bottom of the sample increased from 2.2 °C to 17.1 °C when the DM modifier admixture was increased from 1% to 4%. FT-IR test results showed that the main component of the DM modifier was polypropylene, and the DM-modified asphalt was mainly a physical co-blending process. MD simulation results show that the DM modifier can increase the cohesive energy density (CED) and reduce the fractional free volume (FFV) of asphalt and reduce the binding energy between base asphalt and DM modifier. Multi-scale characterization reveals that DM modifiers can improve the high temperature performance and reduce the thermal storage stability of asphalt. It is noteworthy that both macroscopic tests and microscopic simulations show that 1% is an acceptable dosage level.
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Affiliation(s)
- Yuanle Li
- School of Highway, Chang’an University, Xi’an 710064, China
| | - Bing Hui
- School of Highway, Chang’an University, Xi’an 710064, China
| | - Xinyi Yang
- School of Highway, Chang’an University, Xi’an 710064, China
| | - Huimin Wang
- School of Highway, Chang’an University, Xi’an 710064, China
| | - Ning Xu
- School of Highway, Chang’an University, Xi’an 710064, China
| | - Ponan Feng
- College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China
| | - Ziye Ma
- School of Highway, Chang’an University, Xi’an 710064, China
| | - Hainian Wang
- School of Highway, Chang’an University, Xi’an 710064, China
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14
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Li H, Zhou L, Sun J, Wang S, Zhang M, Hu Y, Temitope AA. Analysis of the Influence of Production Method, Plastic Content on the Basic Performance of Waste Plastic Modified Asphalt. Polymers (Basel) 2022; 14:polym14204350. [PMID: 36297928 PMCID: PMC9608455 DOI: 10.3390/polym14204350] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 11/20/2022] Open
Abstract
The sustainable reuse of waste plastic as an alternative construction material has numerous environmental and economic advantages. New opportunities to recycle waste plastic in asphalt for road construction would mitigate landfill issues and significantly reduce global carbon emissions. With a clear aim to contribute to a more efficient reuse of waste plastic, this paper reutilized two types of waste plastic (polypropylene (PP) and polyethylene (PE)) as asphalt modifiers to improve the performance of asphalt pavement as well as to achieve the purpose of sustainable recycling waste plastic. Therefore, the optimal preparation parameters of plastic-modified asphalt were recommended by the orthogonal test. Then, the dispersion and modification mechanisms of plastic particles in plastic-modified asphalt were further studied by Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Differential Scanning Calorimetry (TG-DSC). The results show that the asphalt containing PP and PE shows better overall performance at high temperatures compared with the base asphalt. Furthermore, PE-modified asphalt and PP-modified asphalt exhibited optimal properties when prepared at 3000 rpm for 30 min at 170 °C. Moreover, the results of the expansion mechanism show that the main reaction process of plastic asphalt is a physical change. Finally, PP-modified asphalt and PE-modified asphalt generally perform well and are suitable for high-temperature areas. Consequentially, the results of this research promote the recycling of waste plastic, ultimately advocating the recycling of waste materials and environmental protection of pavement construction.
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Affiliation(s)
- Haibin Li
- School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
- Correspondence:
| | - Lichang Zhou
- School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
| | - Jianmei Sun
- School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
| | - Sirui Wang
- Shaanxi Transportation Holding Group Co., Ltd., Xi’an 710064, China
| | - Mingming Zhang
- School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
| | - Yihong Hu
- School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
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Feng L, Zhao P, Chen T, Jing M. Study on the Influence of Nano-OvPOSS on the Compatibility, Molecular Structure, and Properties of SBS Modified Asphalt by Molecular Dynamics Simulation. Polymers (Basel) 2022; 14:4121. [PMID: 36236070 DOI: 10.3390/polym14194121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
Abstract
The present research is carried out to inspect the influence of nano-OvPOSS (octavinyl oligomeric silsesquioxane) with different particle sizes on styrene-butadiene-styrene (SBS) modified asphalt through the method of molecular dynamics simulation. This nanomaterial is investigated for the first time to be used in asphalt modification. With the construction of modified asphalt simulation models and the analysis of their mixing energy, radius of gyration (Rg), radial distribution function (RDF), ratio of free volume (RFV), heat capacity, bulk modulus, and shear modulus, this study elucidates the influence of nano-OvPOSS on the compatibility between SBS and asphalt, on the structure of SBS as well as that of asphalt molecules and on the temperature stability and mechanical properties of SBS modified asphalt. The results show that nano-OvPOSS not only is compatible with SBS as well as with asphalt, but also is able to improve the compatibility between SBS and asphalt. Nano-OvPOSS is able to reinforce the tractility of branched chains of SBS and make SBS easier to wrap the surrounding asphalt molecules. The free movement space of molecules in the SBS modified asphalt system also shrinks. Moreover, the addition of nano-OvPOSS into SBS modified asphalt results in higher heat capacity, bulk modulus, and shear modulus of modified asphalt. All of these effects contribute to a more stable colloidal structure as well as more desirable temperature stability and deformation resistance of the modified asphalt system. The overall results of the study show that nano-OvPOSS can be used as a viable modifier to better the performance of conventional SBS modified asphalt.
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16
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Fan G, Liu H, Liu C, Xue Y, Ju Z, Ding S, Zhang Y, Li Y. Analysis of the Influence of Waste Seashell as Modified Materials on Asphalt Pavement Performance. Materials (Basel) 2022; 15:ma15196788. [PMID: 36234145 PMCID: PMC9570732 DOI: 10.3390/ma15196788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/19/2022] [Accepted: 09/24/2022] [Indexed: 05/31/2023]
Abstract
An increasing amount of waste seashells in China has caused serious environmental pollution and resource waste. This paper aims to solve these problems by using waste seashells as modified materials to prepare high-performance modified asphalt. In this study, seashell powder (SP) and stratum corneum-exfoliated seashell powder (SCESP) were adopted to prepare 10%, 20% and 30% of seashell powder-modified asphalt (SPMA) and stratum corneum-exfoliated seashell powder-modified asphalt (SCESPMA) by the high-speed shear apparatus, respectively. The appearance and composition of two kinds of SPs were observed and determined by the scanning electron microscope (SEM). The types of functional groups, temperature frequency characteristics, low temperature performance and adhesion of SPMA were tested by the Fourier-transform infrared (FTIR) spectrometer, dynamic shear rheometer (DSR), bending beam rheometer (BBR) and contact angle meter. The results show that the SP and SCESP are rough and porous, and their main component is CaCO3, which is physically miscible to asphalt. When the loading frequency ranges from 0.1 Hz to 10 Hz, the complex shear modulus (G*) and phase angle (δ) of SPMA and SCESPMA increase and decrease, respectively. At the same load frequency, SCESPMA has a larger G* and a smaller δ than SPMA. At the same temperature, SCESPMA has a larger rutting factor (G*/sin δ) and better high-temperature deformation resistance than SPMA. SP and SCESP reduce the low-temperature cracking resistance of asphalt, of which SCESP has a more adverse effect on the low-temperature performance of asphalt than SP. When SP and SCESP are mixed with asphalt, the cohesion work (Waa), adhesion work (Was) and comprehensive evaluation parameters of water stability (ER1, ER2 and ER3) of asphalt are improved. It is shown that both SP and SCESP have good water damage resistance, of which SCESP has better water damage resistance than SP. These research results have important reference value for the application of waste biological materials in asphalt pavement.
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Affiliation(s)
- Guopeng Fan
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
| | - Honglin Liu
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
- Henan Transport Investment Group Co., Ltd., Zhengzhou 450016, China
| | - Chaochao Liu
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
| | - Yanhua Xue
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
| | - Zihao Ju
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
| | - Sha Ding
- Wuhan Hanyang Municipal Construction Group Co., Ltd., Wuhan 430050, China
| | - Yuling Zhang
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
| | - Yuanbo Li
- National Engineering Research Center of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
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17
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Zhou G, Li C, Wang H, Zeng W, Ling T, Jiang L, Li R, Liu Q, Cheng Y, Zhou D. Preparation of Wax-Based Warm Mixture Additives from Waste Polypropylene (PP) Plastic and Their Effects on the Properties of Modified Asphalt. Materials (Basel) 2022; 15:ma15124346. [PMID: 35744405 PMCID: PMC9228889 DOI: 10.3390/ma15124346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/31/2022] [Accepted: 06/02/2022] [Indexed: 12/04/2022]
Abstract
The production of high-performance, low-cost warm mix additives (WMa) for matrix asphalt remains a challenge. The pyrolysis method was employed to prepare wax-based WMa using waste polypropylene plastic (WPP) as the raw material in this study. Penetration, softening point, ductility, rotational viscosity, and dynamic shear rheological tests were performed to determine the physical and rheological properties of the modified asphalt. The adhesion properties were characterized using the surface free energy (SFE) method. We proved that the pyrolysis temperature and pressure play a synergistic role in the production of wax-based WMa from WPPs. The product prepared at 380 °C and 1.0 MPa (380-1.0) can improve the penetration of matrix asphalt by 61% and reduce the viscosity (135 °C) of matrix asphalt by 48.6%. Furthermore, the modified asphalt shows favorable elasticity, rutting resistance, and adhesion properties; thus, it serves as a promising WMa for asphalt binders.
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Affiliation(s)
- Gang Zhou
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
| | - Chuanqiang Li
- School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (H.W.); (W.Z.)
- Correspondence: ; Tel.: +86-23-6265-2389
| | - Haobo Wang
- School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (H.W.); (W.Z.)
| | - Wei Zeng
- School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (H.W.); (W.Z.)
| | - Tianqing Ling
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
| | - Lin Jiang
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
| | - Rukai Li
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
| | - Qizheng Liu
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
| | - Ying Cheng
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
| | - Dan Zhou
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (G.Z.); (T.L.); (L.J.); (R.L.); (Q.L.); (Y.C.); (D.Z.)
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18
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Xue X, Gao J, Wang J, Chen Y. Evaluation of High-Temperature and Low-Temperature Performances of Lignin-Waste Engine Oil Modified Asphalt Binder and Its Mixture. Materials (Basel) 2021; 15:ma15010052. [PMID: 35009199 PMCID: PMC8746038 DOI: 10.3390/ma15010052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 05/27/2023]
Abstract
This research aims to explore the high-temperature and low-temperature performances of lignin-waste engine oil-modified asphalt binder and its mixture. For this research, the lignin with two contents (4%, 6%) and waste engine oil with two contents (3%, 5%) were adopted to modify the control asphalt binder (PG 58-28). The high-temperature rheological properties of the lignin-waste engine oil-modified asphalt binder were investigated by the viscosity obtained by the Brookfield viscometer and the temperature sweep test by the dynamic shear rheometer. The low-temperature rheological property of the lignin-waste engine oil-modified asphalt binder was evaluated by the stiffness and m-value at two different temperatures (-18 °C, -12 °C) obtained by the bending beam rheometer. The high-temperature and the low-temperature performances of the lignin-waste engine oil-modified asphalt mixture were explored by the rutting test and low-temperature bending beam test. The results displayed that the rotational viscosity and rutting factor improved with the addition of lignin and decreased with the incorporation of waste engine oil. Adding the lignin into the control asphalt binder enhanced the elastic component while adding the waste engine oil lowered the elastic component of the asphalt binder. The stiffness of asphalt binder LO60 could not meet the requirement in the specification, but the waste engine oil made it reach the requirement based on the bending beam rheometer test. The waste engine oil could enhance the low-temperature performance. The dynamic stabilities of LO40- and LO60-modified asphalt mixture increased by about 9.05% and 17.41%, compared to the control mixture, respectively. The maximum tensile strain of LO45 and LO65 increased by 16.39% and 25.28% compared to that of LO40 and LO60, respectively. The high- and low-temperature performances of the lignin-waste engine oil-modified asphalt LO65 was higher than that of the control asphalt. The dynamic stability had a good linear relationship with viscosity, the rutting factor of the unaged at 58 °C, and the rutting factor of the aged at 58 °C, while the maximum tensile strain had a good linear relationship with m-value at -18 °C. This research provides a theoretical basis for the further applications of lignin-waste engine oil-modified asphalt.
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Affiliation(s)
- Xue Xue
- Key Laboratory of Transport Industry of Road Structure and Materials (Xi’an), Chang’an University, Xi’an 710064, China; (X.X.); (Y.C.)
- Xi’an Municipal Engineering Design & Research Institute Co., Ltd., Xi’an 710065, China
| | - Junfeng Gao
- Key Laboratory of Transport Industry of Road Structure and Materials (Xi’an), Chang’an University, Xi’an 710064, China; (X.X.); (Y.C.)
- National & Local Joint Engineering Laboratory of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China
| | - Jiaqing Wang
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Yujing Chen
- Key Laboratory of Transport Industry of Road Structure and Materials (Xi’an), Chang’an University, Xi’an 710064, China; (X.X.); (Y.C.)
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Kong P, Xu G, Yang J, Chen X, Zhu Y. Study on Storage Stability of Activated Reclaimed Rubber Powder Modified Asphalt. Materials (Basel) 2021; 14:ma14164684. [PMID: 34443206 PMCID: PMC8398284 DOI: 10.3390/ma14164684] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/15/2021] [Accepted: 08/17/2021] [Indexed: 11/16/2022]
Abstract
The purpose of this research was to make full use of waste lubricating by-products (LBP) and reclaimed rubber powder (RR) to modify asphalt by a one-pot approach, so as to achieve the dual purpose of solving the poor storage stability of reclaimed rubber powder modified asphalt (RRMA) and the realization of solid waste recycling. A variety of characterization techniques were performed to analyze storage stability, conventional properties and microstructure of LBP-activated reclaimed rubber powder modified asphalt (Blend). Fourier transform infrared spectroscopy illustrated that not only the chemical composition of LBP was very similar to that of asphalt, but also the activation of LBP improved the compatibility of RR with asphalt and enhanced the storage stability of Blend. Fluorescence spectrum and scanning electron microscopy results indicated that the RR without LBP activation was aggregated and dispersed as blocks in asphalt, while the LBP activated RR was uniformly dispersed in the asphalt phase. The segregation test demonstrated that Blend exhibited outstanding storage stability, in which the softening point difference was within 2.5 °C and the segregation rate was -0.2-0.2. In addition, the conventional properties of Blend have been significantly improved, especially in penetration and ductility. More importantly, the short-term aging results demonstrated that, compared with RRMA, Blend possessed excellent anti-aging performance.
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Affiliation(s)
- Peipei Kong
- School of Transportation, Southeast University, Nanjing 211189, China; (P.K.); (G.X.); (J.Y.)
| | - Gang Xu
- School of Transportation, Southeast University, Nanjing 211189, China; (P.K.); (G.X.); (J.Y.)
| | - Jingyao Yang
- School of Transportation, Southeast University, Nanjing 211189, China; (P.K.); (G.X.); (J.Y.)
| | - Xianhua Chen
- School of Transportation, Southeast University, Nanjing 211189, China; (P.K.); (G.X.); (J.Y.)
- Correspondence:
| | - Yaqin Zhu
- Jiangsu Zhonghong Environment Technology Co., Ltd., Jiangyin 214434, China;
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Chen B, Dong F, Yu X, Zheng C. Evaluation of Properties and Micro-Characteristics of Waste Polyurethane/Styrene-Butadiene-Styrene Composite Modified Asphalt. Polymers (Basel) 2021; 13:2249. [PMID: 34301007 DOI: 10.3390/polym13142249] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 11/29/2022] Open
Abstract
In order to solve the problems caused by asphalt diseases and prolong the life cycle of asphalt pavement, many studies on the properties of modified asphalt have been conducted, especially polyurethane (PU) modified asphalt. This study is to replace part of the styrene-butadiene-styrene (SBS) modifier with waste polyurethane (WP), for preparing WP/SBS composite modified asphalt, as well as exploring its properties and microstructure. On this basis, this paper studied the basic performance of WP/SBS composite modified asphalt with a conventional performance test, to analyze the high- and low-temperature rheological properties, permanent deformation resistance and storage stability of WP/SBS composite modified asphalt by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests. The microstructure of WP/SBS composite modified asphalt was also observed by fluorescence microscope (FM) and Fourier transform infrared spectroscopy (FTIR), as well as the reaction between WP and asphalt. According to the results of this study, WP can replace SBS as a modifier to prepare WP/SBS composite modified asphalt with good low-temperature resistance, whose high-temperature performance will be lower than that of SBS modified asphalt. After comprehensive consideration, 4% SBS content and 15% WPU content (4 S/15 W) are determined as the suitable types of WPU/SBS composite modified asphalt.
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21
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Yan W, Ou Y, Xie J, Huang T, Peng X. Study on Properties of Bone Glue/Polyurethane Composite Modified Asphalt and Its Mixture. Materials (Basel) 2021; 14:3769. [PMID: 34300688 DOI: 10.3390/ma14143769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/28/2022]
Abstract
Composite modification technology is widely used in the materials field. To enhance the property of polyurethane modified asphalt and realize its application in road engineering, the bone glue/polyurethane composite modified asphalt (CMA) was prepared using bone glue, polyurethane, and neat asphalt in this research. The bone glue content ranges 5–10%, that of the polyurethane is 1–5%. The relationship between the modifier’s content and the conventional properties and rheological properties of CMA was revealed by response surface methodology (RSM). The CMA performance was further verified under the optimal content of the bone glue and polyurethane. The differences of properties of styrene–butadienestyrene (SBS) modified asphalt mixture, neat asphalt mixture, and bone glue/polyurethane CMA mixture were compared and analyzed by using the pavement performance test. The results showed that the CMA’s conventional properties and rheological properties are improved. The optimal bone glue content and polyurethane content determined by RSM are 6.848% and 2.759%, respectively. The low-temperature crack resistance and water stability of the CMA mixture are enhanced, better than neat asphalt mixture and SBS modified asphalt mixture. The CMA mixture’s dynamic stability is 85% of SBS modified asphalt mixture, but it is 2.4 times of neat asphalt mixture. The result indicated that the bone glue/polyurethane CMA mixture still has certain advantages of high-temperature stability. In this research, the composite modification of bone glue and polyurethane can significantly enhance the characteristic of asphalt and asphalt mixture and provide a new method for applying and promoting polyurethane modified asphalt in road engineering.
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22
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Yu C, Hu K, Yang Q, Wang D, Zhang W, Chen G, Kapyelata C. Analysis of the Storage Stability Property of Carbon Nanotube/Recycled Polyethylene- Modified Asphalt Using Molecular Dynamics Simulations. Polymers (Basel) 2021; 13:1658. [PMID: 34065181 DOI: 10.3390/polym13101658] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/04/2021] [Accepted: 05/05/2021] [Indexed: 12/04/2022] Open
Abstract
Carbon nanotubes (CNTs) can improve the storage properties of modified asphalt by enhancing the interfacial adhesion of recycled polyethylene (RPE) and base asphalt. In this study, the interaction of CNT/RPE asphalt was investigated using molecular dynamics simulation. The base asphalt was examined using a 12-component molecular model and verified by assessing the following properties: its four-component content, elemental contents, radial distribution function (RDF) and glass transition temperature. Then, the adhesion properties at the interface of the CNT/RPE-modified asphalt molecules were studied by measuring binding energy. The molecular structural stability of CNTs at the interface between RPE and asphalt molecules was analyzed through the relative concentration distribution. The motion of molecules in the modified asphalt was studied in terms of the mean square displacement (MSD) and diffusion coefficient. The results showed that CNTs improved the binding energy between RPE and base asphalt. CNTs not only weakened the repulsion of RPE with asphaltenes and resins, but also promoted the interaction of RPE with light components, which facilitated the compatibility of RPE with the base asphalt. The change in the interaction affected the molecular motion, and the molecular diffusion coefficient in the CNT/RPE-modified asphalt system was significantly smaller than that of RPE-modified asphalt. Moreover, the distribution of the asphaltene component was promoted by CNTs, resulting in the enhancement of the storage stability of RPE-modified asphalt. The property indexes indicated that the storage stability was significantly improved by CNTs, and better viscoelastic properties were also observed. Our research provides a foundation for the application of RPE in pavement engineering.
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Liu W, Xu Y, Wang H, Shu B, Barbieri DM, Norambuena-Contreras J. Enhanced Storage Stability and Rheological Properties of Asphalt Modified by Activated Waste Rubber Powder. Materials (Basel) 2021; 14:ma14102693. [PMID: 34065577 PMCID: PMC8160994 DOI: 10.3390/ma14102693] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/15/2021] [Accepted: 05/17/2021] [Indexed: 12/02/2022]
Abstract
Segregation of waste crumb rubber powder (WR) modified asphalt binders the large-scale application of WR in asphalt. The method of microwave activation combined with chemical activation (KMWR) was proposed to improve storage stability and rheological properties of WR modified asphalt in this work. Storage stability and rheological properties of virgin asphalt, MWR modified asphalt, and KMWR modified asphalt were comparatively studied by the standard segregation test, bending beam rheometer (BBR) test, and dynamic shear rheometer (DSR) test. The effect of composite activation on waste rubber powder particles was studied by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and Brunauer–Emmett–Teller (BET) tests. The main results showed that after the physical and chemical composite activation, the storage stability of waste rubber powder modified asphalt was significantly improved, WR modified asphalt had better crack resistance, better rutting resistance, and better fatigue performance. After physical and chemical activation, WR was desulfurized, and a large number of active groups was grafted on the WR particles.
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Affiliation(s)
- Weihong Liu
- Jiangsu College of Engineering and Technology, Nantong 226007, China; (W.L.); (H.W.)
| | - Yishen Xu
- Foshan Transportation Science and Technology Co., Ltd., Foshan 528000, China;
| | - Hongjun Wang
- Jiangsu College of Engineering and Technology, Nantong 226007, China; (W.L.); (H.W.)
| | - Benan Shu
- Foshan Transportation Science and Technology Co., Ltd., Foshan 528000, China;
- Correspondence: ; Tel.: +86-132-9414-8458
| | - Diego Maria Barbieri
- Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway;
| | - Jose Norambuena-Contreras
- LabMAT, Department of Civil and Environmental Engineering, Universidad del Bío-Bío, Concepcion 1202, Chile;
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Moretti L, Fabrizi N, Fiore N, D’Andrea A. Mechanical Characteristics of Graphene Nanoplatelets- Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes. Materials (Basel) 2021; 14:ma14092434. [PMID: 34067163 PMCID: PMC8125687 DOI: 10.3390/ma14092434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 11/25/2022]
Abstract
In recent years, nanotechnology has sparked an interest in nanomodification of bituminous materials to increase the viscosity of asphalt binders and improves the rutting and fatigue resistance of asphalt mixtures. This paper presents the experimental results of laboratory tests on bituminous mixtures laid on a 1052 m-long test section built in Rome, Italy. Four asphalt mixtures for wearing and binder layer were considered: two polymer modified asphalt concretes (the former modified with the additive Superplast and the latter modified with styrene–butadiene–styrene), a “hard” graphene nanoplatelets (GNPs) modified asphalt concrete and a not-modified mixture. The indirect tensile strength, water sensitivity, stiffness modulus, and fatigue resistance of the mixtures were tested and compared. A statistical analysis based on the results has shown that the mixtures with GNPs have higher mechanical performances than the others: GNP could significantly improve the tested mechanical performances; further studies will be carried out to investigate its effect on rutting and skid resistance.
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Liu S, Gao Y, Jin J, Chen H, Liu X, Liu R, Guan Q, Wu Y, Long H, Qian G. Synergy Effect of Nano-Organic Palygorskite on the Properties of Star-Shaped SBS- Modified Asphalt. Polymers (Basel) 2021; 13:polym13060863. [PMID: 33799695 PMCID: PMC7999607 DOI: 10.3390/polym13060863] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/01/2021] [Accepted: 03/07/2021] [Indexed: 11/21/2022] Open
Abstract
With the rapid development of economic construction, styrene-butadiene-styrene (SBS)-modified asphalt is being more and more widely used in highway engineering, but there are still many deficiencies in the process of its use. In order to further improve its performance for use, nano-organic palygorskite (A-Pal) and star-shaped SBS were compounded to obtain modified asphalt in this study. The high-temperature stability of SBS-modified asphalt was enhanced after incorporation with A-Pal for the high-temperature stability test by a dynamic shear rheometer. The A-Pal should improve the surface free energy and adhesion of SBS-modified asphalt by the water stability test analysis. The aging test shows that A-Pal can reduce the thermal oxygen decomposition of SBS and improve the anti-aging performance and the fatigue resistance of SBS-modified asphalt. A-Pal has a certain improvement effect on the low temperature performance of SBS-modified asphalt as shown by a low temperature crack resistance test. A-Pal-compounded SBS-modified asphalt features good storage stability in normal temperatures with the lowest critical compatibility temperature.
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Affiliation(s)
- Shuai Liu
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
| | - Yuchao Gao
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
| | - Jiao Jin
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
- Correspondence:
| | - Huiwen Chen
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
| | - Xinyu Liu
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
| | - Ruohua Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
| | - Qingjun Guan
- School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;
| | - Yinrui Wu
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
| | - Huaqiang Long
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
| | - Guoping Qian
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China; (S.L.); (Y.G.); (H.C.); (X.L.); (Y.W.); (H.L.); (G.Q.)
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Li W, Han S, Fu X, Huang K. Evaluation of Micro-Mechanism and High- and Low-Temperature Rheological Properties of Disintegrated High Volume Crumb Rubber Asphalt (DHVRA). Materials (Basel) 2021; 14:1145. [PMID: 33670943 DOI: 10.3390/ma14051145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 02/24/2021] [Accepted: 02/24/2021] [Indexed: 11/28/2022]
Abstract
The aims of this paper are to prepare disintegrated high volume crumb rubber asphalt (DHVRA) with low viscosity, good workability and low-temperature performance by adding disintegrating agent (DA) in the preparation process, and to further analyze the disintegrating mechanism and evaluated high-temperature and low-temperature rheological properties. To obtain DHVRA with excellent comprehensive performance, the optimum DA dosage was determined. Based on long-term disintegrating tests and the Fluorescence Microscopy (FM) method, the correlations between key indexes and crumb rubber (CR) particle diameter was analyzed, and the evaluation indicator and disintegrating stage division standard were put forward. Furthermore, Fourier transform infrared spectroscopy (FT-IR) and Gel Permeation Chromatography (GPC) was used to reveal the reaction mechanism, and the contact angle test method was adopted to evaluate the surface free energy (SFE). In addition, the high-temperature and low-temperature rheological properties were measured, and the optimum CR content was proposed. Results indicated that the optimum DA dosage was 7.5‰, and the addition of DA promoted the melt decomposition of CR, reduced the viscosity and improved the storage stability. The 135 °C rotational viscosity (RV) of DHVRA from mixing for 3 h could be reduced to 1.475 Pa·s, and the softening point difference was even less than 2 °C. The linear correlation between 135 °C RV and the diameter of CR particle in rubber asphalt system was as high as 0.968, and the viscosity decay rate (VDR) was used as the standard to divide the disintegrating process into a fast disintegrating stage, stable disintegrating stage and slight disintegrating stage. Compared to common rubber asphalt (CRA), DHVRA has an absorption peak at 960 cm−1 caused by trans olefin = C-H, and higher molecular weight and polar component of surface energy. Compared with CRA, although the high-temperature performance of DHVRA decreases slightly, the low-temperature relaxation ability can be greatly improved.
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Yang L, Zhou D, Kang Y. Rheological Properties of Graphene Modified Asphalt Binders. Nanomaterials (Basel) 2020; 10:E2197. [PMID: 33158033 DOI: 10.3390/nano10112197] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/25/2020] [Accepted: 11/02/2020] [Indexed: 12/02/2022]
Abstract
Recently, low-cost, high-quality graphene can be obtained readily, so it is potential to prepare conductive graphene modified asphalts (GMAs). In this paper, GMAs were prepared with 0%, 2%, 4%, 6%, 8%, and 10% of graphene by weight of composites. Dynamic shear rheological experiments conducted from −30 to 120 °C illustrate that elasticity at above ambient temperatures and rutting resistance at higher temperatures are enhanced and, especially, the conceived percolation of GMAs occurs at graphene contents (GC) above 8% which were verified from three changes as GC increases, i.e., the curve characteristics of complex moduli, storage moduli at temperatures over 100 °C, temperatures when the phase angle reaches 90° and the trend of TG′=G″. The modification mechanisms are different before and after percolation. Before the percolation threshold, graphene which has a molecular structure similar to asphaltene enhances asphalt, like increasing asphaltene components, and after threshold, graphene improves asphalt because of the formed graphene networks. Rotational viscosities test results show that the higher the GC is, the higher the operating temperatures are, but the operating temperatures are higher than 200 °C when GC is above 4%. The percolation helps to further develop conductive asphalt concrete for intelligence pavement, but the operating properties of GMAs need to be improved.
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Liang M, Su L, Li P, Shi J, Yao Z, Zhang J, Jiang H, Luo W. Investigating the Rheological Properties of Carbon Nanotubes/Polymer Composites Modified Asphalt. Materials (Basel) 2020; 13:ma13184077. [PMID: 32937835 PMCID: PMC7560345 DOI: 10.3390/ma13184077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/01/2020] [Accepted: 09/08/2020] [Indexed: 11/16/2022]
Abstract
The utilization of nanomaterials in the field of binder materials for road paving has attracted researchers’ attention in recent years. This study presented the performance properties of a binder modified with carbon nanotubes (CNT) and polyethylene (PE). The rheological properties, adhesion behavior, morphology, and storage stability of the modified asphalt were investigated. Experimental analysis indicated a positive effect of CNT/PE composites on the performance of the binder. The results indicate that the combined use of CNT and PE shows a significant enhancement on complex modulus, viscosity, and creep recovery of the binder at high temperatures and a great decrease in compliance, indicating great resistance to permanent deformation. Meanwhile, only using CNT to improve the high temperature performance of the binder is limited due to high shear mixing. CNT/PE modifiers enhance the cracking resistance at low temperatures and moisture damage resistance. The CNT/PE melt mixing composites endow asphalt with stronger cracking resistance, better resistance to moisture damage and workability. Asphalt with CNT/PE composites formed an even dispersion system. Notably, CNT bridges on the interface between PE phase and asphalt for the two modified asphalts, which reinforces the cohesion of interface. Asphalt with CNT/PE composites showed improved storage stability in comparison with PE modified asphalt.
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Affiliation(s)
- Ming Liang
- School of Qilu Transportation, Shandong University, Jinan 250002, China; (M.L.); (L.S.); (P.L.); (Z.Y.); (J.Z.)
| | - Linping Su
- School of Qilu Transportation, Shandong University, Jinan 250002, China; (M.L.); (L.S.); (P.L.); (Z.Y.); (J.Z.)
| | - Peizhao Li
- School of Qilu Transportation, Shandong University, Jinan 250002, China; (M.L.); (L.S.); (P.L.); (Z.Y.); (J.Z.)
| | - Jingtao Shi
- PetroChina Fuel Oil Co., Ltd., Research Institute, Beijing 100195, China;
| | - Zhanyong Yao
- School of Qilu Transportation, Shandong University, Jinan 250002, China; (M.L.); (L.S.); (P.L.); (Z.Y.); (J.Z.)
| | - Jizhe Zhang
- School of Qilu Transportation, Shandong University, Jinan 250002, China; (M.L.); (L.S.); (P.L.); (Z.Y.); (J.Z.)
| | - Hongguang Jiang
- School of Qilu Transportation, Shandong University, Jinan 250002, China; (M.L.); (L.S.); (P.L.); (Z.Y.); (J.Z.)
- Correspondence: (H.J.); (W.L.); Tel.: +86-137-0531-8533 (H.J.)
| | - Weixin Luo
- State Key Laboratory of Special Functional Waterproof Materials, Beijing Oriental Yuhong Waterproof Technology Co. Ltd., Beijing 100123, China
- Correspondence: (H.J.); (W.L.); Tel.: +86-137-0531-8533 (H.J.)
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Ye Q, Dong W, Wang S, Li H. Research on the Rheological Characteristics and Aging Resistance of Asphalt Modified with Tourmaline. Materials (Basel) 2019; 13:E69. [PMID: 31877826 DOI: 10.3390/ma13010069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 12/17/2019] [Accepted: 12/20/2019] [Indexed: 11/17/2022]
Abstract
Tourmaline modified asphalt (TMA) binders were prepared with different modifier types and contents in this research. The routine properties, rheological properties, and aging resistance were evaluated to research the function of tourmaline on the performances of asphalt binders. Test results show that the storage stability can be improved significantly by the smaller particle size and negative-ion treated surface of tourmaline modifier. It indicates that the stiffness and rutting-resistance of TMA binder can be enhanced significantly, and the elastic component of the viscoelastic characteristic can also be increased. Moreover, the complex viscosity and the Zero Shear Viscosity (ZSV) values of tourmaline modified asphalt are increased within the test frequency range, which results in the improvement of deformation resistance of tourmaline modified asphalt. When mixed with asphalt, the tourmaline modifier maintains a two-phase structure, which results in the good rheological property for tourmaline modified asphalt.
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Wang P, Shi FQ, Liu XY, Ren RB, Zhu Y, Sun H, Zheng GS, Dong ZJ, Wang LZ. Role of Aliphatic Chain Characteristics on the Anti-Cracking Properties of Polymer- Modified Asphalt at Low Temperatures. Polymers (Basel) 2019; 11:E2025. [PMID: 31817766 DOI: 10.3390/polym11122025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 11/30/2019] [Accepted: 12/03/2019] [Indexed: 11/17/2022] Open
Abstract
The anti-cracking properties of polymer-modified asphalt depend largely on the molecular structure of the polymer modifier. However, the mysterious structure-performance relationship is still elusive. In this paper, three kinds of polymers with different chain structures were selected to address this issue. The indices of styrene, trans-butadiene, aliphatic branched-chain, and aliphatic long-chain from the infrared spectrum were used to quantify the functional group compositions of polymer modifiers. Viscoelastic parameters, including relaxation time, dissipation energy ratios, and stiffness were assessed to illustrate the anti-cracking properties of polymer-modified asphalt. Results showed that relaxation time and dissipation energy ratios were mainly determined by the polymer network strength, molecular size, aliphatic chain feature, and the orientations speed of aliphatic chains. The short relaxation time and high dissipation ratio lead to the low stiffness and favorable low-temperature performance of asphalt. The improvement of these performances requires a polymer with high indices of an aliphatic long-chain, styrene, aliphatic branched-chain, and trans-butadiene, respectively. An aliphatic-long chain, aliphatic branched-chain, and trans-butadiene were soft segments in asphalt while styrene was the rigid segment. The soft segments affect the intramolecular friction, orientation, and thermal motion at low temperatures, whereas the rigid segment enhances the strength of polymer networks. Thus, the anti-cracking property of polymer-modified asphalt can be improved by adjusting the ratio of soft and rigid segments in the polymer modifier.
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Xie J, Yang Y, Lv S, Zhang Y, Zhu X, Zheng C. Investigation on Rheological Properties and Storage Stability of Modified Asphalt Based on the Grafting Activation of Crumb Rubber. Polymers (Basel) 2019; 11:polym11101563. [PMID: 31557923 PMCID: PMC6835636 DOI: 10.3390/polym11101563] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/12/2019] [Accepted: 09/23/2019] [Indexed: 11/16/2022] Open
Abstract
Acrylamide with a double bond and amide group can not only copolymerize with macromolecules of crumb rubber but also react with acidic groups in asphalt, so it was selected as a modifier to activate crumb rubber through chemical graft action. The purpose is to improve the compatibility between crumb rubber and asphalt and thus improve the rheological properties and storage stability of rubber asphalt. Infrared spectroscopy (IR) and scanning electron microscopy (SEM) were used to characterize the crumb rubbers and their modified asphalt. It was found that the crumb rubber of grafting acrylamide had better compatibility in asphalt due to its larger specific surface area and chemical reaction with asphalt. In addition, the high temperature rheological test, low temperature creep test, and polymer separation test were carried out to study the effect of grafted activated crumb rubber on the properties of modified asphalt. The results showed that compared with modified asphalt with common crumb rubber (CRMA), the rheological properties and storage stability of modified asphalt with grafting activated crumb rubber (A–G–R) were improved significantly. The results of microscopic and macroscopic tests show that the activated rubber particles have a larger contact area with asphalt due to a rougher surface and the chemical cross-linking between rubber particles and asphalt further strengthens their interaction. Therefore, there is a relatively stable blend system formed in modified asphalt, and its performance of modified asphalt has been improved.
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Affiliation(s)
- Juan Xie
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.
- National Engineering Laboratory for Highway Maintenance Technology, Changsha University of Science and Technology, Changsha 410114, China.
| | - Yueming Yang
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Songtao Lv
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.
- National Engineering Laboratory for Highway Maintenance Technology, Changsha University of Science and Technology, Changsha 410114, China.
| | - Yongning Zhang
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Xuan Zhu
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.
| | - Cece Zheng
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.
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Xue Y, Zhao H, Wei X, Niu Y. Performance Analysis of Compound Rubber and Steel Slag Filler Modified Asphalt Composite. Materials (Basel) 2019; 12:ma12162588. [PMID: 31416232 PMCID: PMC6720664 DOI: 10.3390/ma12162588] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 08/04/2019] [Accepted: 08/05/2019] [Indexed: 11/16/2022]
Abstract
A new treatment method of combined crumb rubber and steel slag modifier for asphalt binders was proposed in this work. The viscosity, rheological properties, and thermogravimetric analysis of modified asphalt mortar were then investigated. The modified asphalt composite was prepared in laboratory by two steps. Rubber powder was firstly added into hot asphalt flux to make rubber modified asphalt (RA), and then RA binders were wrapped with steel slag powder by granulation machine to make compound rubber and steel slag filler modified asphalt composite (RSAC). Test results showed that the viscosity–temperature susceptibility of RSAC was superior to that of modified asphalt binder with only one additive. The softening point differences of RSAC was 2.1 °C. The complex modulus and phase angle were significantly influenced by the addition of steel slag fillers. Creep tests show that a better anti-permanent deformation performance of RSAC can be obtained, which means a better low temperature performance could be predictable. The CAM (Christensen-Anderson-Marasteanu) and Burgers models can be used to describe the change of complex modulus and viscous-elasticity performance of RSCA. The lower value of me (0.6344) and R (0.1862) from the CAM model indicated that RSAC was slightly related to the sensibility of frequency. The higher value of λ∞ and E0 of RSAC indicated a better ability of shear-creep resistance.
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Affiliation(s)
- Yongjie Xue
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
| | - Hui Zhao
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
| | - Xintong Wei
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
| | - Yunya Niu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
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Xie J, Yang Y, Lv S, Peng X, Zhang Y. Investigation on Preparation Process and Storage Stability of Modified Asphalt Binder by Grafting Activated Crumb Rubber. Materials (Basel) 2019; 12:E2014. [PMID: 31234607 DOI: 10.3390/ma12122014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 11/26/2022]
Abstract
According to the theory of molecular design, crumb rubber was grafting activated with acrylamide and then used as asphalt binder modifier. An orthogonal three-factor, three-level test was designed to optimize the preparation process of modified asphalt. Softening point, viscosity, rutting factor, ductility, stiffness modulus and creep speed index were selected as evaluation indicators to study the effects of rubber content, shear time and shear temperature by variance analysis and range analysis. The results show that the rubber content had a significant impact on the performance of modified asphalt with grafting-activated crumb rubber, while the shear temperature and shear time had little effect. The grafting activated crumb rubber content of 20%, shear temperature of 170–190 °C, and shear time of 90 min was determined as the reasonable preparation process. Modified asphalt with common crumb rubber (CRMA) and modified asphalt with grafting activated crumb rubber (A-G-R) were prepared, respectively, using the reasonable process to analyze the influence of grafting activation of crumb rubber. The results indicate that A-G-R had smaller softening point difference, lower segregation index and more stable and uniform dispersed phase.
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Yan X, Ning G, Wang X, Ai T, Zhao P, Wang Z. Preparation and Short-Term Aging Properties of Asphalt Modified by Novel Sustained-Release Microcapsules Containing Rejuvenator. Materials (Basel) 2019; 12:ma12071122. [PMID: 30987389 PMCID: PMC6480191 DOI: 10.3390/ma12071122] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/28/2019] [Accepted: 04/02/2019] [Indexed: 11/16/2022]
Abstract
Aged asphalt can enormously affect the performance of asphalt pavement and cause serious environmental hazards. Microcapsule-modified asphalt is one of the effective means to improve the anti-aging ability of asphalt. In this work, novel sustained-release microcapsules containing rejuvenator were prepared by the solvent evaporation method. The morphology of the microcapsules was characterized by scanning electron microscopy (SEM). The sustained-release properties of the microcapsules were investigated by static thermogravimetric analysis. The physical properties such as penetration, ductility, softening point, and Brookfield viscosity of the original asphalt and microcapsule-modified asphalt were studied. In addition, the viscoelasticity of the original asphalt and microcapsule-modified asphalt was investigated by means of a dynamic shear rheometer (DSR). The results show that the prepared microcapsules have a smooth surface and a complete encapsulation with an average particle size of 60 μm. After the heating treatment (above 140 °C), a large number of micropores were formed on the shell surface of microcapsules, which provided a structural basis for the sustained-release of rejuvenator. The release rate of the rejuvenator was obviously slowed down by the microcapsules. The aging behavior of sustained-release microcapsules containing rejuvenator-modified asphalt can be greatly improved. The enhanced anti-aging properties of sustained-release microcapsule-modified asphalt are attributed to the functions of the rejuvenator which can be slowly released from the micropores on the microcapsules' surface, after which the light components lost in the original asphalt can be supplemented.
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Affiliation(s)
- Xin Yan
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.
| | - Guotao Ning
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.
| | - Xiaofeng Wang
- Research and Development Center of Transport Industry of Technologies, Materials and Equipments of Highway Construction and Maintenance, Zhengzhou 450052, China.
| | - Tao Ai
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.
| | - Peng Zhao
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.
- Engineering Research Center of Pavement Materials, Ministry of Education of P.R. China, Chang'an University, Xi'an 710061, China.
| | - Zhenjun Wang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.
- Engineering Research Center of Pavement Materials, Ministry of Education of P.R. China, Chang'an University, Xi'an 710061, China.
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Kang Y, Jin R, Wu Q, Pu L, Song M, Cheng J, Yu P. Anhydrides-Cured Bimodal Rubber-Like Epoxy Asphalt Composites: From Thermosetting to Quasi-Thermosetting. Polymers (Basel) 2016; 8:polym8040104. [PMID: 30979205 PMCID: PMC6432489 DOI: 10.3390/polym8040104] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 03/16/2016] [Accepted: 03/18/2016] [Indexed: 11/16/2022] Open
Abstract
The present engineering practices show the potential that epoxy asphalt composites (EACs) would be a better choice to obtain long life for busy roads. To understand the service performance–related thermorheological properties of prepared bimodal anhydrides-cured rubber-like EACs (REACs), a direct tensile tester, dynamic shear rheometer and mathematical model were used. Tensile tests demonstrate that all the REACs reported here are more flexible than previously reported anhydrides-cured REACs at both 20 and 0 °C. The better flexibility is attributed to the change of bimodal networks, in which cross-linked short chains decreased and cross-linked long chains increased, relatively. Strain sweeps show that all the REACs have linear viscoelastic (LVE) properties when their strains are smaller than 1.0% from −35 to 120 °C. Temperature sweeps illustrate that the thermorheological properties of REACs evolve from thermosetting to quasi-thermosetting with asphalt content, and all the REACs retain solid state and show elastic properties in the experimental temperature range. A Cole–Cole plot and Black diagram indicate that all the REACs are thermorheologically simple materials, and the master curves were constructed and well-fitted by the Generalized Logistic Sigmoidal models. This research provides a facile approach to tune the thermorheological properties of the REACs, and the cheaper quasi-thermosetting REAC facilitates their advanced applications.
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Affiliation(s)
- Yang Kang
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Rui Jin
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Qiang Wu
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Liang Pu
- Department of Chemistry and Molecular Engineering, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Mingyu Song
- Department of Chemistry and Molecular Engineering, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Jixiang Cheng
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
- Jinan Urban Construction Group, Jinan, Shandong 250001, China.
| | - Pengfei Yu
- College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
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