THE PERFORMANCE AND BEHAVIOR OF FLEXIBLE PAVEMENTS AT LOW TEMPERATURES

A PAVEMENT DESIGN SYSTEM EMBODYING SERVICEABILITY AGE HISTORIES AND THE TOTAL COST SEEMS NECESSARY TO PRODUCE THESE SERVICEABILITY PROFILES IS PRESENTED. THE EFFECTS OF LOW TEMPERATURE ENVIRONMENT ON FLEXIBLE PAVEMENT PERFORMANCE IS THEN CONSIDERED. THE MECHANISM OF LOW TEMPERATURE PAVEMENT CRACKING IS POSTULATED AS INCLUDING TWO PHASES-LIMITED DEPTH CRACK INITIATION IS FOLLOWED BY FULL DEPTH PROPAGATION THROUGH RISING AIR TEMPERATURES OR THERMAL CYCLING. THE MECHANICS OF THE FRACTURE ARE DESCRIBED. A METHOD OF CALCULATING THERMAL STRESSES IS PRESENTED. A PROCEDURE IS PRESENTED FOR PREDICTING THE CONDITIONS UNDER WHICH RESTRAINED ASPHALT CONCRETE SPECIMENS WILL FRACTURE. AN EXPERIMENTAL PROGRAM USING A RANGE OF ASPHALT TYPES AND MIXTURES WAS USED TO VERIRY THE PROCEDURE. THE PRINCIPAL CONCLUSION IS THAT PREDICTIVE PROCEDURES ARE APPLICABLE TO DESIGN EVALUATION OF BITUMINOUS MIXTURES AND THAT THIS EVALUATION IS ECONOMICALLY WARRANTED WHERE LOW-TEMPERATURE CRACKING CAN BE A PROBLEM. /CGRA/

  • Supplemental Notes:
    • 228 Pp, 66 FIG, 10 TAB, 4 PHOT, 82 REF
  • Corporate Authors:

    University of Waterloo

    Department of Civil Engineering, 200 University Avenue West
    Waterloo, Ontario  Canada  N2L 3G1
  • Authors:
    • Haas, R C
  • Publication Date: 1968-6

Subject/Index Terms

Filing Info

  • Accession Number: 00205446
  • Record Type: Publication
  • Source Agency: CANADIAN GOOD ROADS ASSOCIATION
  • Files: TRIS
  • Created Date: Nov 23 1970 12:00AM