PRELIMINARY PERFORMANCE REQUIREMENTS FOR FLEXIBLE PAVEMENT

PRELIMINARY PERFORMANCE REQUIREMENTS FOR A HIGH QUALITY, LONG LIFE, FLEXIBLE PAVEMENT SURFACE COURSE WERE PRESENTED. THE PROBLEMS CONSIDERED IN THE REQUIREMENTS WERE BEARING, FLEXURE, RIPPING (CRACK FAILURE INDUCED AT LOW TEMPERATURES BY BRAKING OF HEAVY LOADS), THERMAL DISTRESS, FOUNDATION EFFECTS, CHEMICAL DEGRADATION AND FATIGUE. TO SIMPLIFY RELATIONS, A MODIFIED CORRESPONDENCE PRINCIPLE WAS USED TO ACCOUNT FOR TIME TEMPERATURE DEPENDENT PROPERTIES. THE BASIS OF FAILURE WAS CONSIDERED TO BE CRACK INITIATION, SO THE APPROACH USED TO DETERMINE THE PERFORMANCE REQUIREMENTS WAS ULTIMATES DESIGN. THE PAVEMENT DISTRESS CALCULATED FROM THE APPROXIMATE DESIGN RELATIONS SHOULD BE SUPERIMPOSED TO OBTAIN THE TOTAL CRITERIA FOR SPECIFICATION OF THE MATERIAL PROPERTIES. THE REQUIRED FUNDAMENTAL MATERIAL PROPERTIES WERE GIVEN IN TERMS OF EQUIVALENT PROPERTIES TO BE OBTAINED FROM THE MOST SIMPLE CHARACTERIZATION TESTS POSSIBLE, NAMELY UNIAXIAL TENSION, UNIAXIAL COMPRESSION, AND PURE SHEAR. THE PERFORMANCE REQUIREMENTS GIVEN WILL BE CONSTRUCTED AS PRELIMINARY UNTIL THE RELATIONS CAN BE CHECKED BY MORE SOPHISTICATED METHODS AND UNTIL THE CONSTITUTIVE RELATIONS FOR TYPICAL PAVEMENT MATERIALS ARE OBTAINED. CONSTITUTIVE RELATIONS ARE NECESSARY IN ORDER TO SELECT THE RATE OF LOADING THAT WILL REFLECT THE WEAKEST PROPERTY OF A PARTICULAR MATERIAL. /AUTHOR/

  • Corporate Authors:

    Texas Transportation Institute

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

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Bynum, D
    • Traxler, R N
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00210436
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Jul 14 1970 12:00AM