LOW TEMPERATURE PERFORMANCE AND BEHAVIOUR OF FLEXIBLE PAVEMENTS

THE BEHAVIOR OF FLEXIBLE PAVEMENTS AT LOW TEMPERATURES IS DISCUSSED AND A DESIGN APPROACH IS PRESENTED THAT MAY BE USED IN PREDICTING FRACTURE SUSCEPTIBILITY IN BITUMINOUS SURFACES. THE EFFECTS OF LOW TEMPERATURE ENVIRONMENT ON PAVEMENT PERFORMANCE ARE EXPLORED AND IT IS SUGGESTED THAT LOW TEMPERATURE CRACKING REPRESENTS AN ANNUAL MULTI-MILLION DOLLAR PROBLEM IN CANADA. THIS CRACKING IN BITUMINOUS SURFACES IS POSTULATED AS OCCURRING IN TWO PHASES WHICH CONSIST OF LIMITED DEPTH INITIATION FOLLOWED BY FULL DEPTH PROPAGATION WITH RISING AIR TEMPERATURES OR THERMAL CYCLING. THE MECHANICS OF THE FRACTURE PHENOMENON ARE DESCRIBED AND PROCEDURES FOR CALCULATING THERMAL STRESSES ARE DISCUSSED. DATA ARE PRESENTED TO ILLUSTRATE THE RELIABILITY OF THE PROCEDURE FOR PREDICTING LOW TEMPERATURE FRACTURE IN BITUMINOUS SURFACES, AND IT IS SUGGESTED THAT THIS CAN BE MARKEDLY INFLUENCED BY THE ASPHALT SOURCE OR TYPE. SEVERAL PRACTICAL DESIGN IMPLICATIONS OF THE CRACKING HYPOTHESIS AND THE FRACTURE PREDICTION APPROACH ARE DISCUSSED. /CGRA/

• Supplemental Notes:
  • Vol 13, pp 201-236, 14 FIG, 1 TAB, 2 PHOT
• Authors:
  • Haas, RCG
• Publication Date: 1968-11

Media Info

• Serial:
  • Canadian Technical Asphalt Association, Proceeding
  • Publisher: POLYSCIENCE PUBLICATIONS INC.

Subject/Index Terms

• TRT Terms: Bituminous materials; Cracking; Flexible pavements; Forecasting; Fracture mechanics; Low temperature; Pavement cracking; Pavement performance; Surface treating; Thermal stresses
• Uncontrolled Terms: Crack propagation; Fracture
• Old TRIS Terms: Bituminous surfacing
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00210589
• Record Type: Publication
• Source Agency: CANADIAN GOOD ROADS ASSOCIATION
• Files: TRIS
• Created Date: Apr 16 1970 12:00AM