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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.
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]
Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 189422958
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  Label: Title
  Group: Ti
  Data: Effects of SBS and Polyester Fiber on Performance Characteristics of Hot Recycled Asphalt Mixtures With High RAP Content.
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  Data: <searchLink fieldCode="AR" term="%22Du%2C+Sujun%22">Du, Sujun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Rui%22">Li, Rui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lirui3@sxgkd.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Guo%2C+Haoyan%22">Guo, Haoyan</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> hyguo@chd.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Sun%2C+Xiaolong%22">Sun, Xiaolong</searchLink> (AUTHOR)<i> xls1998@gdut.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Advances+in+Civil+Engineering%22">Advances in Civil Engineering</searchLink>. 11/19/2025, Vol. 2025, p1-13. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Polyester+fibers%22">Polyester fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Asphalt+pavement+recycling%22">Asphalt pavement recycling</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelasticity%22">Viscoelasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoplastic+elastomers%22">Thermoplastic elastomers</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+strength%22">Fracture strength</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering%22">Engineering</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1155/adce/6655872
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Polyester fibers
        Type: general
      – SubjectFull: Asphalt pavement recycling
        Type: general
      – SubjectFull: Viscoelasticity
        Type: general
      – SubjectFull: Thermoplastic elastomers
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Fracture strength
        Type: general
      – SubjectFull: Engineering
        Type: general
    Titles:
      – TitleFull: Effects of SBS and Polyester Fiber on Performance Characteristics of Hot Recycled Asphalt Mixtures With High RAP Content.
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      – PersonEntity:
          Name:
            NameFull: Du, Sujun
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            NameFull: Li, Rui
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            NameFull: Guo, Haoyan
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            NameFull: Sun, Xiaolong
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            – D: 19
              M: 11
              Text: 11/19/2025
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              Y: 2025
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              Value: 2025
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            – TitleFull: Advances in Civil Engineering
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