Quantifying Thermomechanical Fatigue of Hot Mix Asphalt: A Feasibility Study

Highway agencies and the research community have struggled for many years to improve the repeatability of lab tests that characterize the fracture and fatigue properties of hot mix asphalt (HMA) materials. The major source of uncertainty stems from the fact that specimens grossly deviate from the requirements of solid and continuum mechanic; thus the test protocols and interpretation schemes are inaccurate. Laid down HMA layers in the field are subject to thermomechanical fatigue (TMF) during their service lives where extreme weather can lead to embrittlement (cold weather) and/or healing effects (kneading from traffic coupled with hot weather). There is a need to assess the thermomechanical fatigue resistance of HMA. A systematic experimental-theoretical-numerical paradigm will be developed to evaluate the fracture and fatigue resistance of HMA materials; especially when subjected to thermomechanical conditions. The expected outcomes or results of the project will be: A provisional standard test method for the fracture and fatigue resistance of HMA subjected to TMF; A computational model capable of predicting the mechanical state of HMAs subjected to climate extremes; and A PhD graduate trained to work in the pavement industry.

  • Supplemental Notes:
    • Contract to a Performing Organization has not yet been awarded.

Project

  • Status: Proposed
  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590

    Texas Department of Transportation

    11th and Brazos Streets
    Austin, TX  United States  78701

    University of Texas, El Paso

    El Paso, TX  United States  79968
  • Start Date: 20151101
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01590792
  • Record Type: Research project
  • Source Agency: University of Oklahoma, Norman
  • Files: UTC, RiP
  • Created Date: Feb 22 2016 10:54AM