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Although the use of recycled asphalt materials (RAM) in new asphalt mixtures can reduce the amount of virgin and nonrenewable materials required and increase the rutting resistance of pavements, it may also compromise cracking resistance. To mitigate this issue, asphalt mixtures containing RAM may require the use of a softer binder or recycling agent (RA).

The TRB National Cooperative Highway Research Program's NCHRP Synthesis 586: Use of Recycling Agents in Asphalt Concrete Mixtures documents current state department of transportation (DOT) practices and procedures related to the use of RAs in asphalt mixtures containing RAM.

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2022. Use of Recycling Agents in Asphalt Concrete Mixtures. Washington, DC: The National Academies Press. https://doi.org/10.17226/26601.

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Publication Info

126 pages |  8.5 x 11 |  DOI: https://doi.org/10.17226/26601
Chapters skim
Front Matter i-viii
Summary 1-2
Chapter 1 - Introduction 3-7
Chapter 2 - Literature Review of Use of Recycling Agents in Asphalt Mixtures 8-28
Chapter 3 - Survey on Practices for Use of Recycling Agents in Asphalt Mixtures 29-50
Chapter 4 - Case Examples of Practices for Use of Recycling Agents in Asphalt Mixtures 51-61
Chapter 5 - Summary of Major Findings 62-64
References 65-71
Appendix A - Agency Survey Questions 72-88
Appendix B - Agency Survey Responses (DOTs) 89-104
Appendix C - Agency Survey Responses (CPTAs) 105-115
Abbreviations 116-120

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