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Li H, Sun J, Hao G, Zhao Q, Hu Y, Zou X, Li Z. Effect of styrene butadiene styrene and desulfurized rubber powder on asphalt modification: Preparation, performance enhancement, mechanism analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169077. [PMID: 38056672 DOI: 10.1016/j.scitotenv.2023.169077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/09/2023] [Accepted: 12/01/2023] [Indexed: 12/08/2023]
Abstract
The aim of this study is to propose a desulfurized rubber powder / styrene butadiene styrene (DRP/SBS) composite modified asphalt technology by combining the advantages of DRP and SBS. This reduces the production cost of modified asphalt and improves the performance of asphalt. In this paper, orthogonal tests were used to optimize preparation process parameters of DRP/SBS composite modified asphalt. And the physicochemical properties, modification mechanism of composite modified asphalt had been thoroughly studied. Subsequently, the results showed that the optimum content of DRP and SBS modifiers are 25 % and 2 %, respectively. The suitable preparation process is to add SBS first, then DRP, while shearing at 5000 r/min for 50 min. In addition, DRP/SBS composite modified asphalt has better high-temperature performance, viscosity-temperature characteristics, aging resistance, and storage stability. Meanwhile, the storage stability of the composite modified asphalt was verified by fluorescence microscopy test. Through the Fourier transform infrared spectroscopy test, it was observed that the composite modified asphalt modification process is a compatible and stable modification of physical and chemical coexistence. Overall, the composite modification method achieves recycling of waste tires while improving pavement performance, thus promoting the sustainability of pavement.
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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; Road Engineering Research Center, 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; Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Gongxin Hao
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China; Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Qiongyang Zhao
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China; Road Engineering Research Center, 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; Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Xiaolong Zou
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China; Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an 710054, China.
| | - Zhigang Li
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China; Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an 710054, China.
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Chen Y, Hu K, Chen Y, Zhang T, Zhang W. Preparation and modification mechanism study of microwave-treated crumb rubber and waste engine oil-modified asphalt. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:12483-12498. [PMID: 38231330 DOI: 10.1007/s11356-023-31144-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 11/16/2023] [Indexed: 01/18/2024]
Abstract
The objective of this study was to characterize the performance of waste engine oil (WEO) and microwave-treated crumb rubber (CR)-modified asphalt (WEO-MCRA) and analyze the modification mechanism. The viscosity and dynamic shear rheological (DSR) tests were carried out to evaluate the viscoelasticity property of WEO-MCRA. The storage stability and fluorescence microscope (FM) tests were used to characterize the compatibility of the components. The Fourier transform infrared spectroscopy (FTIR) and molecular dynamic simulation were introduced to analyze the change of function groups and modification mechanism. The results demonstrated that introducing Wt.20% CR treated with microwave and Wt.6% WEO obtained a lower viscosity, excellent storage stability, and satisfactory elasticity properties of asphalt. The morphology of modifiers presented a thread-like structure microscopic with the range of WEO content Wt.3%-Wt.6%. Molecular dynamic simulations revealed that the aromatic may be intensively absorbed by CR and increase the likelihood of phase separation. WEO reduced the binding energy of CR to aromatic from 178.0 to 151.5 kcal/mol, which will contribute to the disaggregation of CR clusters. The diffusion coefficient shows a more obvious decrease with the addition of WEO and microwave treatment, which will benefit the stability of the asphalt. This study can provide a reference for the recycling of CR and WEO.
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Affiliation(s)
- Yan Chen
- College of Civil Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Kui Hu
- College of Civil Engineering, Henan University of Technology, Zhengzhou, 450001, China.
| | - Yujing Chen
- College of Civil Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Taoli Zhang
- College of Civil Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Wengang Zhang
- School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, 255000, China
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Li H, Zhang Y, Zhang M, Cui C, Hao G, Zhou L. Optimizing parameters for the preparation of low viscosity rubber asphalt incorporating waste engine oil using response surface methodology. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:87433-87448. [PMID: 37422565 DOI: 10.1007/s11356-023-28383-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/18/2023] [Indexed: 07/10/2023]
Abstract
Due to the high viscosity, rubber asphalt displays poor construction workability, which ultimately compromises the comfort and safety of pavement. In this study, specified control variates were used to study the effect of the waste engine oil (WEO) addition sequence on the properties of rubber asphalt while ensuring the consistency of other preparation parameters. Initially, in order to evaluate their compatibility, the storage stability and aging properties of the three groups of samples were determined. The variation of asphalt viscosity was then analyzed using a low-field nuclear magnetic resonance (LF-NMR) test, by predicting the fluidity of each sample. Subsequently, the results showed that the rubber asphalt prepared by premixing WEO and crumb rubber (CR) had the best properties of low temperature, compatibility, and fluidity. On this basis, the effects of WEO content, shear rate, shear temperature, and shear time on the properties of low viscosity rubber asphalt were investigated separately through response surface methodology (RSM). Quantitative data from the basic performance experiment were used to fit the high precision regression equation, thereby correlating a more precise level of factors with experimental results. The response surface model prediction analysis showed that the optimal preparation parameters of the low viscosity rubber asphalt were 60 min shear time, 180 °C shear temperature, and 5000 r/min shear rate. Simultaneously, the addition of 3.5% of WEO showed great potential as an asphalt viscosity reducer. Ultimately, this study provides an accurate method for determining the optimum preparation parameters of asphalt.
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Affiliation(s)
- Haibin Li
- School of Civil and Architectural Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
- Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an, 710054, China.
| | - Yongfei Zhang
- School of Civil and Architectural Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China
- Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Mingming Zhang
- School of Civil and Architectural Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China
- Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Canyang Cui
- School of Civil and Architectural Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China
- Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Gongxin Hao
- School of Civil and Architectural Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China
- Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an, 710054, China
| | - Lichang Zhou
- School of Civil and Architectural Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China
- Road Engineering Research Center, Xi'an University of Science and Technology, Xi'an, 710054, China
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