PAVEMENT DESIGN CHARACTERISTICS OF IN-SERVICE ASPHALT MIXTURES

This paper summarizes the findings of a pavement design study on evaluating fatigue and resiliency characteristics and their variations in asphalt materials from in-service pavements in Texas. Cores from seven recently constructed highway pavements in Texas were tested with the repeated load indirect tensile test. Mean values of fatigue life, resilient modulus of elasticity, and resilient Poisson's ratio were determined, and their variations were estimated. In addition, stress-fatigue life relations were evaluated in terms of applied tensile stress and applied stress difference. The relations between repeated load fatigue properties and static properties were also evaluated. Fatigue lives were found to be essentially the same as those reported by other investigators. The mean resilient moduli of elasticity were fairly consistent for the various projects and ranged from 1520 to 4240 MPa (221 000 to 615 000 lbf/sq in). The majority of the Poisson's ratios were in the 0.10 to 0.22 range. The coefficient of variation for fatigue life, which was relatively large, ranged from 30 to 80 percent; the amount of variation was stress and project dependent. The coefficient for resilient modulus was relatively small, from 4 to 28 percent. No correlations for estimating purposes were found, although the relation between fatigue life and tensile strain looked promising. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 24-32
  • Monograph Title: Bituminous concrete materials, mixtures, and additives
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00185292
  • Record Type: Publication
  • ISBN: 0309026881
  • Files: TRIS, TRB
  • Created Date: Jan 13 1979 12:00AM