The Effect Warm Mix Asphalt on RAP in Hot Mix Asphalt

The objective of The Effect of Warm Mix Asphalt on RAP in hot mix asphalt (HMA) project, is to determine whether recycled asphalt pavement (RAP) can be used at typical and higher percentages in warm mix asphalt (WMA). The goal with warm mix asphalt is to produce mixtures with similar strength, durability, and performance characteristics as hot mix asphalt using substantially reduced production temperatures. There are important environmental and health benefits associated with reduced production temperatures including: lower greenhouse gas emissions, lower fuel consumption, and reduced exposure of workers to asphalt fumes. One of the critical issues facing warm mix asphalt is the lack of a formal mixture design procedure. If warm mix asphalt is to replace or be used in conjunction with hot mix asphalt in the future, a laboratory mixture design procedure for warm mix asphalt must be established. Current efforts are underway that have recommended modifications but to date, nothing has yet to be adopted. Key issues that will be addressed during the research project are; (1) Appropriate RAP percentages due to potential of decreased RAP and virgin asphalt binder blending; (2) Possible mixture design modifications for WMA technologies and additives, including foamed asphalt; (3) Possible recommendations for minimum production temperature and storage times of warm mix asphalt and (4) Acceptance procedures for allowing the use of current and new WMA technologies and additives.

  • Supplemental Notes:
    • Rutgers University, Center for Advanced Infrastructure and Transportation (CAIT)


  • English


  • Status: Completed
  • Funding: $330031.00
  • Contract Numbers:


  • Sponsor Organizations:

    New Jersey Department of Transportation

    1035 Parkway Avenue
    Trenton, NJ  United States  08625
  • Project Managers:

    Aboobaker, Nazhat

  • Performing Organizations:

    Center for Advanced Infrastructure and Transportation

    Rutgers University
    100 Brett Road
    Piscataway, NJ  United States  08854-8058
  • Principal Investigators:

    Bennert, Thomas

  • Start Date: 20100501
  • Expected Completion Date: 0
  • Actual Completion Date: 20120430
  • Source Data: RiP Project 26695

Subject/Index Terms

Filing Info

  • Accession Number: 01461344
  • Record Type: Research project
  • Source Agency: Center for Advanced Infrastructure and Transportation
  • Contract Numbers: 254-RU2382
  • Files: UTC, RiP, STATEDOT
  • Created Date: Jan 3 2013 1:44PM