Cold Reclamation and Recycling Techniques to Achieve Perpetual Pavements

Details

• Creators:
  Sabouri, Mohammadreza ; Wegman, Daniel E. ; Dave, Eshan ; Sias, Jo E. ; Al-Ihekwaba, Ebubechukwu
• Corporate Creators:
  Braun Intertec Corporation ; National Road Research Alliance ; University of New Hampshire
• Corporate Contributors:
  Minnesota. Department of Transportation. Office of Research & Innovation
• Subject/TRT Terms:
  Asphalt Emulsions Cold In-place Recycling Laboratory Tests Perpetual Pavements Rehabilitation Rejuvenator Emulsion Rejuvenators Rutting Sustainable Pavement Rehabilitation
• Publication/ Report Number:
  NRRA202604
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Minnesota
• Edition:
  Final Report
• Corporate Publisher:
  Minnesota. Department of Transportation. Office of Research & Innovation
• Abstract:
  This study evaluates Cold In-place Recycling (CIR) for developing sustainable and cost-effective perpetual pavements. As part of the 2022 NRRA construction, four test sections were constructed at the MnROAD mainline section to utilize CIR and additionally assess the effects of incorporating rejuvenator in cold recycled asphalt materials. Two sections included bituminous layer over aggregate base, while the other two included bituminous overlay over stabilized full depth reclamation (SFDR) base layer. For two sections, rejuvenator was incorporated to evaluate its impact on the performance of the cold recycled (CR) layer. Laboratory tests conducted after one year of service showed that even though rejuvenator improved binder fatigue resistance, its benefits were less evident at the mixture level, where cracking resistance declined. Perpetual pavement analysis indicated bottom-up cracking potential in all test sections but suggested that reasonable adjustments to overlay or CIR thickness could achieve perpetual behavior. The contrasting outcomes between binder, mixture, and Falling Weight Deflectometer (FWD) testing highlight the need for further research to fully understand the effect of rejuvenator on the CR layer/material behavior. Additional testing, focusing on fatigue, rutting, and low-temperature performance, is recommended to refine rejuvenator use in CIR applications and optimize cold recycling techniques for perpetual pavement construction.
• Format:
  PDF
• Funding:
  (C)1048377
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:db808a2926efbc67b5531106c856a5612f43f2918ed1b9791aae3a86a96e36ca1581858b5a4c9319081a3bd908547be5d1016d8ea4971c340e96f43547a89b7a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92410/dot_92410_DS1.pdf
• File Type:
  [PDF - 6.02 MB ]