Evaluate Warm Mix Technology for use in Asphalt Rubber - Asphaltic Concrete Friction Courses (AR-ACFC)

European countries are using technologies that allow a reduction in the temperatures at which asphalt mixes are produced and placed. These technologies have been labeled Warm Mix Asphalt (WMA). The immediate benefit to producing WMA is the reduction in energy consumption required by burning fuels to heat traditional hot mix asphalt (HMA) to temperatures in excess of 300° F at the production plant. With the decreased production temperature comes the additional benefit of reduced emissions from burning fuels, fumes, and odors generated at the plant and the paving site. The technology allows the production of WMA by reducing the viscosity of the asphalt binder at a given temperature. This reduced viscosity allows the aggregate to be fully coated at a lower temperature than what is traditionally required in HMA production. There have been a number of demonstration projects in the US with a variety of mixes and binders, but none with asphalt rubber. This will be a two-phase project to evaluate the applicability of warm mix asphalt technology to Arizona Department of Transportation (ADOT's) AR-ACFC mixes. The first phase would be principally a laboratory evaluation and review of relevant literature designed to answer the following questions: Are the existing WMA technologies compatible with the asphalt rubber binders used in ADOT's AR-ACFC mixes? How does ADOT's design procedure for AR-ACFC mixtures need to be modified to accommodate WMA technologies? The second phase would be primarily a field trial with the following research objectives: (1) to characterize (quantify) the potential plant production / mix lay-down savings that can be generated by using WMA technologies in AR-ACFC (e.g. energy cost reduction, reduced emissions, etc.); (2) to characterize the impact of incorporation WMA technologies into AR-ACFC mixes on the surface characteristics of the mix (e.g. noise reduction capabilities, frictional characteristics, and smoothness); and (3) to evaluate the potential for extension of the paving window for AR-ACFC resulting from reduced paving temperatures (e.g. minimum surface temperature, paving season).


    • English


    • Status: Completed
    • Funding: $155000.00
    • Contract Numbers:

      SPR 631

    • Sponsor Organizations:

      Arizona Department of Transportation

      206 South 17th Avenue
      Phoenix, AZ  United States  85007

      Federal Highway Administration

      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590
    • Project Managers:

      Dimitroplos, Christ

    • Performing Organizations:

      AMEC Earth & Environmental, Incorporated

    • Principal Investigators:

      Hanson, Doug

    • Start Date: 20061001
    • Expected Completion Date: 0
    • Actual Completion Date: 20151101
    • Source Data: RiP Project 12492

    Subject/Index Terms

    Filing Info

    • Accession Number: 01566177
    • Record Type: Research project
    • Source Agency: Arizona Department of Transportation
    • Contract Numbers: SPR 631
    • Files: RiP, STATEDOT
    • Created Date: Jun 11 2015 1:02AM