Performance of WMA Technologies: Stage II-Long-Term Field Performance

The use of warm mix asphalt (WMA) technology offers significant benefits, notably, lower energy demand during production and construction, reduced emissions at the plant and the paver, and increased allowable haul distances. However, it also presents potential engineering challenges. Lower WMA production temperatures and the water injection used with some WMA technologies have raised concerns about possible rutting and moisture susceptibility of WMA pavements. Thus, facilitating the implementation of WMA technologies in the United States requires the collection and analysis of definitive information on the material and engineering properties and long-term performance of WMA pavements constructed with the wide range of WMA technologies now available. The objectives of this research are to (1) identify the material and engineering properties of WMA pavements that are significant determinants of their long-term field performance and (2) recommend best practices for the use of WMA technologies. Phase I and II deliverables shall include technical reports with the Phase III Final Report summarizing the results, findings, conclusions, and recommendations of Phases I and II, with particular emphasis on the following: 1) Performance of the WMA and control hot mix asphalt (HMA) pavements from time of construction through the contract period. 2) Material and engineering properties that are significant determinants of the performance of the WMA pavements compared to the HMA controls. 3) Recommended best practices for the use of WMA technologies developed in this project or updated from Projects 9-43, 9-47A, and 9-49. 4. Recommended changes to AASHTO specifications and test methods.


  • English


  • Status: Active
  • Contract Numbers:

    Project 09-49A

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway & Transportation Officials

    444 North Capitol Street, NW, Suite 225
    Washington, DC    20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  USA  20001
  • Project Managers:

    Harrigan, Edward

  • Performing Organizations:

    Washington State University, Pullman

    Civil & Environmental Engineering Department
    PO Box 642910
    Pullman, WA  USA  99164-2910
  • Principal Investigators:

    Shen, Shihui

  • Start Date: 20110429
  • Actual Completion Date: 20160728
  • Source Data: RiP Project 26891

Subject/Index Terms

Filing Info

  • Accession Number: 01463871
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 09-49A
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:31PM