Effects of SBS and Polyester Fiber on Performance Characteristics of Hot Recycled Asphalt Mixtures With High RAP Content.
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| Title: | Effects of SBS and Polyester Fiber on Performance Characteristics of Hot Recycled Asphalt Mixtures With High RAP Content. |
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| Authors: | Du, Sujun1,2 (AUTHOR), Li, Rui1,2 (AUTHOR) lirui3@sxgkd.edu.cn, Guo, Haoyan3 (AUTHOR) hyguo@chd.edu.cn, Sun, Xiaolong (AUTHOR) xls1998@gdut.edu.cn |
| Source: | Advances in Civil Engineering. 11/19/2025, Vol. 2025, p1-13. 13p. |
| Subjects: | Polyester fibers, Asphalt pavement recycling, Viscoelasticity, Thermoplastic elastomers, Mechanical behavior of materials, Fracture strength, Engineering |
| Abstract: | The decrease in the viscoelasticity of the binder and the failure of the aggregate gradation are the main reasons for the poor crack resistance and stability of hot recycled asphalt mixtures with high reclaimed asphalt pavement (RAP) materials content. In this work, the effects of of old/new aggregates synthetic gradation, styrene–butadiene–styrene (SBS) block copolymer and polyester fiber on the physical, mechanical, and road performance of hot recycled asphalt mixtures were throughly researched and analyzed. Results show that the compactness and mechanical properties of mixtures with high RAP content deteriorated due to the weak adhesion and viscoelasticity of the binder. 0.25% of polyester fiber can significantly improve the low‐temperature cracking resistance by inhibiting crack propagation through fiber bridging, but excessive content can cause structural inhomogeneity. Marshall stability, compactness, and deformation resistance of mixtures with 1.5% SBS can be significantly improved due to the uniform physical cross‐linking network formed by SBS. The collaborative incorporation of SBS and polyester fiber can further improve mixture properties, which is attributed to the enhancement of viscoelasticity brought by SBS and the excellent volume stability performance brought by polyester fibers. This work can provide a scientific basis for rationally regulating SBS and polyester fiber contents for optimizing properties of RAP hot recycled asphalt mixtures with high RAP content and highlights considerable engineering application potential. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The decrease in the viscoelasticity of the binder and the failure of the aggregate gradation are the main reasons for the poor crack resistance and stability of hot recycled asphalt mixtures with high reclaimed asphalt pavement (RAP) materials content. In this work, the effects of of old/new aggregates synthetic gradation, styrene–butadiene–styrene (SBS) block copolymer and polyester fiber on the physical, mechanical, and road performance of hot recycled asphalt mixtures were throughly researched and analyzed. Results show that the compactness and mechanical properties of mixtures with high RAP content deteriorated due to the weak adhesion and viscoelasticity of the binder. 0.25% of polyester fiber can significantly improve the low‐temperature cracking resistance by inhibiting crack propagation through fiber bridging, but excessive content can cause structural inhomogeneity. Marshall stability, compactness, and deformation resistance of mixtures with 1.5% SBS can be significantly improved due to the uniform physical cross‐linking network formed by SBS. The collaborative incorporation of SBS and polyester fiber can further improve mixture properties, which is attributed to the enhancement of viscoelasticity brought by SBS and the excellent volume stability performance brought by polyester fibers. This work can provide a scientific basis for rationally regulating SBS and polyester fiber contents for optimizing properties of RAP hot recycled asphalt mixtures with high RAP content and highlights considerable engineering application potential. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 16878086 |
| DOI: | 10.1155/adce/6655872 |
