A THERNAL STRESS RESISTANCE PARAMETER AS A MEASURE OF THE CRACK SUSCEPTIBILITY OF FLEXIBLE PAVEMENTS

THERMAL LOADINGS ARE AN IMPORTANT CAUSE OF STRESS AND FAILURE IN FLEXIBLE PAVEMENTS. WHEN A PAVEMENT IS SUBJECTED TO A TEMP. GRADIENT, IT IS POSSIBLE FOR THE PAVEMENT TO DEVELOP CRACKS. IN ORDER TO PROVIDE AN INDEX THAT WILL EVALUATE A GIVEN PAVEMENT SURFACE, A THERMAL STRESS RESISTANCE PARAMETER CAN BE USED. THIS PARTICULAR PARAMETER INTERRELATES THE TENSILE STRENGTH, STIFFNESS MODULUS, COEFFICIENT OF THERMAL EXPANSION AND POISSON'S RATIO FOR MIXTURES. IT IS BASED ON THE CONCEPT OF THERMAL SHOCK EVALUATION OF MATERIALS ON A MACROSCOPIC SCALE. ALTHOUGH IT DOES NOT PREDICT PRECISELY WHEN A PAVEMENT WILL CRACK, IT DOES ILLUSTRATE THAT PAVEMENTS THAT HAVE CRACKED SHOW LOW VALUES OF THIS PARAMETER. /CGRA/RRL/

• Supplemental Notes:
  • Vol 13, pp 237-246, 4 FIG, 2 TAB, 10 REF
• Authors:
  • Breen, J J
  • Stephens, J E
• Publication Date: 1968-11

Media Info

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

Subject/Index Terms

• TRT Terms: Cracking; Flexible pavements; Loads; Modulus; Poisson ratio; Stiffness; Tensile strength; Thermal expansion; Thermal stresses
• Uncontrolled Terms: Loading; Parameters
• Old TRIS Terms: Poissons ratio; Resistance
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00205638
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Apr 25 1971 12:00AM