Effectiveness of Sustainable Asphalt Recycling Agents

Studies have shown improved resistance to rutting as a result of incorporating Reclaimed Asphalt Pavement (RAP) in Hot-Mix Asphalt (HMA), they have indicated concerns over premature fatigue failure and thermal cracking. Hence, many Departments of Transportation (DOTs) do not allow or limit the use of any RAP in the surface course HMA. The use of Asphalt Recycling Agents (ARAs) has been introduced for reducing the brittleness of HMA containing RAP. As a result, the use of a higher amount of RAP in asphalt mixes without compromising their resistance to rutting, fatigue cracking, and thermal cracking, is made theoretically possible. However, the effectiveness of different ARAs in increasing the flexibility of asphalt binder and their effects on the long-term performance of HMA remain unknown. Mainly due to the lack of laboratory and field performance data, a widely accepted specification that can be used to select, approve, or evaluate ARAs is not available. To this end, the proposed study will determine how ARAs affect the rutting and cracking resistance of the asphalt mixes and binders containing RAP. This objective will be achieved by conducting a comprehensive laboratory testing program on asphalt binders and mixes.


  • English


  • Status: Active
  • Funding: $134192
  • Contract Numbers:


  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    Mountain-Plains Consortium

    North Dakota State University
    Fargo, ND  United States  58108
  • Project Managers:

    Tolliver, Denver

  • Performing Organizations:

    Dept. of Civil and Environmental Engineering

    South Dakota State University
    Brookings, SD  United States 
  • Principal Investigators:

    Ghabchi, Rouzbeh

  • Start Date: 20220524
  • Expected Completion Date: 20240731
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers Program
  • Source Data: MPC-689

Subject/Index Terms

Filing Info

  • Accession Number: 01848309
  • Record Type: Research project
  • Source Agency: Mountain-Plains Consortium
  • Contract Numbers: 69A3551747108
  • Files: UTC, RIP
  • Created Date: Jun 9 2022 3:25PM