Development of a SFE Database for Screening of Mixes for Moisture Damage in Oklahoma

With recent developments in testing equipment, test methods and studies focused on performance testing, asphalt mix design methods are moving increasingly from empirical to mechanistic. In spite of these developments, the moisture-induced damage (also called stripping) potential of asphalt mixes is generally evaluated using the retained indirect tensile strength ratio (TSR) test or from the stripping inflection point (SIP) in the Hamburg wheel tracking (HWT) test. Although widely used as indicators of moisture-induced damage potential, neither of these tests directly addresses the mechanisms governing stripping of asphalt pavements. A mechanistic approach is needed for screening of asphalt mixes at the design stage to combat moisture-induced damages of pavements that cost millions of dollars annually. A particular area of weakness is screening of mixes containing reclaimed asphalt pavement (RAP) and warm-mix asphalt (WMA). Surface Free Energy (SFE) characteristics of asphalt mixes can be used effectively to quantify bond strength and debonding of aggregate and asphalt binder in presence of water, which cannot be achieved using either a TSR or a HWT test. This study will deliver a SFE database and training for pavement designers for the implementation of this innovative and cost-effective mechanistic approach.

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


  • English


  • Status: Proposed
  • Sponsor Organizations:

    Oklahoma Department of Transportation

    200 NE 21st Street
    Oklahoma City, OK  United States  73105

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Start Date: 20160101
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01590811
  • Record Type: Research project
  • Source Agency: University of Oklahoma, Norman
  • Files: UTC, RiP
  • Created Date: Feb 22 2016 1:09PM