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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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