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Impact of Recycled Binder Availability on Performance Properties of RAP Asphalt Mixtures.

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Title: Impact of Recycled Binder Availability on Performance Properties of RAP Asphalt Mixtures.
Authors: Yin, Fan1 (AUTHOR) f-yin@auburn.edu, Taylor, Adam2 (AUTHOR) tayloa3@auburn.edu, Chen, Chen3 (AUTHOR) czc0105@auburn.edu, Moraes, Raquel4 (AUTHOR) moraes@auburn.edu, Tran, Nam5 (AUTHOR) nht0002@auburn.edu
Source: Journal of Materials in Civil Engineering. Sep2025, Vol. 37 Issue 9, p1-14. 14p.
Subjects: Asphalt pavements, Asphalt testing, Limestone, Granite, Mixtures, Asphalt
Abstract: This study evaluated the impact of recycled binder availability (RBA) on the performance properties of asphalt mixtures in Florida, covering two recycled asphalt pavements (RAP) contents (20% and 40%) and two aggregate types (granite and limestone). According to the current state specification, the 20% RAP mixture used a performance grade (PG) 76-22 polymer-modified asphalt binder, and the 40% RAP mixture used a PG 52-28 binder. Each mixture was subjected to a rigorous performance testing plan at two asphalt binder contents: volumetric optimum binder content (V-OBC) and RBA-adjusted optimum binder content (A-OBC) at 80% RBA. The testing plan included the indirect tensile asphalt cracking test (IDEAL-CT), overlay test (OT), Hamburg wheel tracking test (HWTT), asphalt pavement analyzer (APA), and indirect tensile asphalt rutting test (IDEAL-RT). Test results indicated that adding more virgin binders, considering 80% RBA, improved cracking resistance but reduced moisture resistance in RAP mixtures, especially those with 40% RAP. Increasing virgin binder content also reduced rutting resistance in 40% RAP mixtures but had a negligible impact on 20% RAP mixtures. At A-OBC, 40% RAP mixtures had comparable cracking resistance but were more rutting resistant than 20% RAP mixtures. Additional HWTT and IDEAL-CT testing of 40% RAP mixtures showed that grade bumping the virgin binder from PG 52-28 to PG 58-28 and PG 58-22 improved the rutting and moisture resistance of 40% RAP mixtures, but its impact on the cracking resistance varied depending on the virgin aggregate type. Finally, the HWTT, APA, and IDEAL-RT results were strongly correlated, whereas the IDEAL-CT and OT results showed a moderate or weak correlation depending on the mixture aging condition. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials in Civil Engineering is the property of American Society of Civil Engineers 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 186640951
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PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Impact of Recycled Binder Availability on Performance Properties of RAP Asphalt Mixtures.
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  Data: <searchLink fieldCode="AR" term="%22Yin%2C+Fan%22">Yin, Fan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> f-yin@auburn.edu</i><br /><searchLink fieldCode="AR" term="%22Taylor%2C+Adam%22">Taylor, Adam</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> tayloa3@auburn.edu</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chen%22">Chen, Chen</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> czc0105@auburn.edu</i><br /><searchLink fieldCode="AR" term="%22Moraes%2C+Raquel%22">Moraes, Raquel</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> moraes@auburn.edu</i><br /><searchLink fieldCode="AR" term="%22Tran%2C+Nam%22">Tran, Nam</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> nht0002@auburn.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+in+Civil+Engineering%22">Journal of Materials in Civil Engineering</searchLink>. Sep2025, Vol. 37 Issue 9, p1-14. 14p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Asphalt+pavements%22">Asphalt pavements</searchLink><br /><searchLink fieldCode="DE" term="%22Asphalt+testing%22">Asphalt testing</searchLink><br /><searchLink fieldCode="DE" term="%22Limestone%22">Limestone</searchLink><br /><searchLink fieldCode="DE" term="%22Granite%22">Granite</searchLink><br /><searchLink fieldCode="DE" term="%22Mixtures%22">Mixtures</searchLink><br /><searchLink fieldCode="DE" term="%22Asphalt%22">Asphalt</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study evaluated the impact of recycled binder availability (RBA) on the performance properties of asphalt mixtures in Florida, covering two recycled asphalt pavements (RAP) contents (20% and 40%) and two aggregate types (granite and limestone). According to the current state specification, the 20% RAP mixture used a performance grade (PG) 76-22 polymer-modified asphalt binder, and the 40% RAP mixture used a PG 52-28 binder. Each mixture was subjected to a rigorous performance testing plan at two asphalt binder contents: volumetric optimum binder content (V-OBC) and RBA-adjusted optimum binder content (A-OBC) at 80% RBA. The testing plan included the indirect tensile asphalt cracking test (IDEAL-CT), overlay test (OT), Hamburg wheel tracking test (HWTT), asphalt pavement analyzer (APA), and indirect tensile asphalt rutting test (IDEAL-RT). Test results indicated that adding more virgin binders, considering 80% RBA, improved cracking resistance but reduced moisture resistance in RAP mixtures, especially those with 40% RAP. Increasing virgin binder content also reduced rutting resistance in 40% RAP mixtures but had a negligible impact on 20% RAP mixtures. At A-OBC, 40% RAP mixtures had comparable cracking resistance but were more rutting resistant than 20% RAP mixtures. Additional HWTT and IDEAL-CT testing of 40% RAP mixtures showed that grade bumping the virgin binder from PG 52-28 to PG 58-28 and PG 58-22 improved the rutting and moisture resistance of 40% RAP mixtures, but its impact on the cracking resistance varied depending on the virgin aggregate type. Finally, the HWTT, APA, and IDEAL-RT results were strongly correlated, whereas the IDEAL-CT and OT results showed a moderate or weak correlation depending on the mixture aging condition. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Materials in Civil Engineering is the property of American Society of Civil Engineers 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:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1061/JMCEE7.MTENG-20162
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 1
    Subjects:
      – SubjectFull: Asphalt pavements
        Type: general
      – SubjectFull: Asphalt testing
        Type: general
      – SubjectFull: Limestone
        Type: general
      – SubjectFull: Granite
        Type: general
      – SubjectFull: Mixtures
        Type: general
      – SubjectFull: Asphalt
        Type: general
    Titles:
      – TitleFull: Impact of Recycled Binder Availability on Performance Properties of RAP Asphalt Mixtures.
        Type: main
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            NameFull: Yin, Fan
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            NameFull: Taylor, Adam
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            NameFull: Chen, Chen
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            NameFull: Moraes, Raquel
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            NameFull: Tran, Nam
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            – D: 01
              M: 09
              Text: Sep2025
              Type: published
              Y: 2025
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              Value: 08991561
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              Value: 37
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              Value: 9
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            – TitleFull: Journal of Materials in Civil Engineering
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