127-4(F) "EVALUATION OF ASPHALT STRUCTURAL PERFORMANCE"

A METHOD OF FUNDAMENTAL EVALUATION OF ASPHALT CEMENT STRUCTURAL PERFORMANCE WAS EXAMINED BY MEASUREMENT OF THE MECHANICAL BEHAVIOR (LOAD RESPONSE AND FAILURE) OF CANDIDATE ASPHALTIC CONCRETE MIXTURES BY APPLICATION OF DIRECT UNIAXIAL TENSION AND COMPRESSION, SPLITTING TENSION, TRIAXIAL TENSION, AND DOUBLE LAP SHEAR TEST PROCEDURES. THE MIXTURES WERE MADE BY USING TWO DIFFERENT REPRESENTATIVE ASPHALT CEMENTS (UNMODIFIED AND MODIFIED BY THE ADDITION OF A SYNTHETIC ELASTOMERIC POLYMER). TEST RESULTS WERE EXAMINED WITH RESPECT TO RELIABILITY OF THE TEST PROCEDURES AND THEIR CAPABILITY OF DISTINGUISHING AMONG ASPHALT CEMENTS OF SIGNIFICANTLY DIFFERENT COMPOSITION AND CHARACTERISTICS. THE RESULTS INDICATE THAT RELIABLE TEST METHODS ARE AVAILABLE BUT REQUIRE FURTHER DEVELOPMENT TO MAKE THEM SUITABLE FOR PRACTICAL APPLICATION. THE RESULTS ALSO INDICATE THAT RELATIVE STRUCTURAL PERFORMANCE WILL VARY WITH STRESS AXIALITY AND THAT ADEQUATE EVALUATION OF ASPHALT CEMENT STRUCTURAL PERFORMANCE REQUIRES MORE THAN UNIAXIAL TEST METHODS. THE VISCOELASTIC (TIME DEPENDENT) NATURE OF ASPHALTIC CONCRETE WAS CONFIRMED AND IT WAS SHOWN THAT ADDITION OF ELASTOMERIC POLYMER WILL SIGNIFICANTLY ALTER THE STRUCTURAL PERFORMANCE OF AN ASPHALT CEMENT. /AUTHOR/

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  USA  78701
  • Authors:
    • Britton, S C
    • Bynum, D
    • Ledbetter, W B
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00210470
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Study No 127-4(f)
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Feb 15 1972 12:00AM