Skip Navigation

Mid-America Transportation Center

Accelerated Testing of Warm Asphalt Mixtures for Safe and Reliable Freight Transportation (Phase 3)


Researchers

  • Principal Investigator: Hosin Lee (hlee@engineering.uiowa.edu 319-335-6818)
  • Co-Principal Investigator: Mustaque Hossain (mustak@ksu.edu (785) 532-1576)
  • Project Status
    In Progress
    Sponsors & Partners
  • Nebraska Department of Roads
  • About this Project
    Brief Project Description & Background
    Warm mix asphalt provides many benefits including reduced fuel consumption, less carbon dioxide emissions, longer paving season, longer hauling distance, reduced oxidation of asphalt, earlier opening to traffic and a better working environment in the field. For this reason it is moving into the mainstream of asphalt pavement construction in the United States. At the University of Iowa, researchers have evaluated WMA with six additives compared to a control WMA and HMA mixtures. However, no WMA mixtures satisfied the Superpave requirement of 80% for the moisture susceptibility test. WMA mixtures should therefore be tested using the accelerated testing equipment in the lab and APT facility.
    Research Objective
    The objectives of this research will be to 1) review past research efforts in this area, 2) perform a wheel tracking test on both HMA and WMA mixtures, 3) perform a wheel loading test on both HMA and WMA mixtures, and gather information on the moisture susceptibility and other characteristics of the WMA.
    Potential Benefits
    Increased implementation of WMA provides many environmental benefits and is cost effective, and this research will find more information about its properties through accelerated testing, which has not been performed extensively with WMA mixtures
    Abstract
    Warm mix asphalt provides many benefits including reduced fuel consumption, less carbon dioxide emissions, longer paving season, longer hauling distance, reduced oxidation of asphalt, earlier opening to traffic and a better working environment in the field. For this reason it is moving into the mainstream of asphalt pavement construction in the United States. NCAT recently proposed a national WAM certification program. At the University of Iowa, researchers have evaluated WMA with six additives compared to a control WMA and HMA mixtures. However, no WMA mixtures satisfied the Superpave requirement of 80% for the moisture susceptibility test. Moisture damage can occur because of a loss of a bond between the asphalt cement or the mastic. WMA mixtures should therefore be tested using the accelerated testing equipment in the lab and APT facility to understand their long-term performance and how safe their use is on roadways with high volumes of freight transportation.
    Project Amount
    $ 100,000.48