Long-Term Performance of Asphalt Concrete Mixed with RAP and RAS

The objective of this project is to evaluate the short- and long-term aging performance of high reclaimed asphalt pavement (RAP) and recycled asphalt shingle (RAS) asphalt mixtures utilizing various recycling additives (“rejuvenators”) in the context of balanced mixture design. Mixtures were evaluated for workability using gyratory compactor derived parameters, rutting and moisture susceptibility using the Hamburg Wheel-Track Test (HWTT), intermediate temperature cracking using the Indirect Tensile Asphalt Cracking Test (IDEAL-CT), and low temperature cracking using a modified IDEAL-CT test. It is concluded that the recycling additives used in this study can be used to produce an asphalt mixture containing high amounts of RAP with similar performance to a virgin mixture utilizing the same components using concepts of balanced mixture design. However, the use of 5% RAS in conjunction with RAP is shown to cause difficulties in restoring cracking resistance relative to the virgin mixtures. The effect of aging on mixture performance is significant and measuring mixture performance using at least two levels of aging is recommended to evaluate the efficacy of the various recycling additives in terms of long-term performance.

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• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/56864
• Corporate Authors:

  University of Wisconsin, Madison

  Department of Civil and Environmental Engineering
  1415 Engineering Drive
  Madison, WI  United States  53706

  Wisconsin Department of Transportation

  Research and Library Unit
  Madison, WI  United States  53705
• Authors:
  • Bahia, Hussain
  • Zhang, Yuan
  • Swiertz, Dan
  • Soleimanbeigi, Ali
• Publication Date: 2020-7

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 101p

Subject/Index Terms

• TRT Terms: Aging (Materials); Asphalt concrete; Cracking; Mix design; Moisture damage; Pavement performance; Reclaimed asphalt pavements; Recycled materials; Shingles; Workability
• Subject Areas: Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01759933
• Record Type: Publication
• Contract Numbers: WHRP 00 0092-19-13; TPF-5(352)
• Files: NTL, TRIS, ATRI, STATEDOT
• Created Date: Dec 14 2020 9:14AM