A STUDY OF TRANSVERSE CRACKING OF BITUMINOUS PAVEMENTS

SAMPLES OF PAVEMENT FROM THIRTY-THREE DIFFERENT CONTRACTS, VARYING IN AGE FROM FIVE TO TWENTY-FIVE YEARS, WERE EXAMINED AND ANALYZED IN THE LABORATORY. THESE INCLUDED SPECIMENS OF THE BITUMINOUS LAYERS, GRANULAR BASE AND SUBGRADE. CRACK INDICES WERE PREPARED OF THE SAMPLED AREAS. THE DATA OBTAINED FROM 153 SPECIMENS WERE SUBJECT TO REGRESSION ANALYSIS AND A MATHEMATICAL MODEL WAS DEVELOPED TO DESCRIBE TRANSVERSE CRACKING IN TERMS OF PAVEMENT PROPERTIES. THE RESULTS FROM THIS ANALYSIS ARE PRESENTED AS ARE THE FINAL MODELS WHICH IDENTIFY APPROXIMATELY NINE TO ELEVEN SIGNIFICANT VARIABLES. TABULATED AND GRAPHICAL PRESENTATIONS OF THE DATA ARE INCLUDED TOGETHER WITH PHOTOGRAPHS OF THE TYPES OF CRACKING EXPERIENCED. THE CONCLUSIONS OF THE STUDY IDENTIFY THOSE VARIABLES RELATED TO VISCOSITY OF THE ASPHALT AND THE CHANGE IN VISCOSITY WITH TEMPERATURE AS HAVING THE MOST SIGNIFICANT EFFECT ON TRANSVERSE CRACKING. A CLOSE RELATIONSHIP WAS FOUND TO EXIST BETWEEN THE NEWLY DEVELOPED TEST PROPERTY 'CRITICAL TEMPERATURE' AND THE FREQUENCY OF OCCURRENCE OF TRANSVERSE CRACKING. A TEST SECTION OF ROAD IS BRIEFLY DESCRIBED WHERE TWO EXPERIMENTAL, HIGH-PENETRATION-INDEX ASPHALTS, BOTH WITH LOW CRITICAL TEMPERATURE VALUES, ARE BEING USED AND CONTRASTED TO REGULAR MATERIAL TO ASSESS THEIR RESISTANCE TO TRANSVERSE CRACKING. /AUTHOR/

• Supplemental Notes:
  • Rept Rr 176, 22 PP, 4 FIG, 6 TAB, 31 REF, 1 APP
• Corporate Authors:

  Ontario Dept Transp & Communications

  ,    
• Authors:
  • Fromm, H J
  • Phang, W A
• Publication Date: 1972-1

Subject/Index Terms

• TRT Terms: Asphalt; Bituminous pavements; Mathematical models; Regression analysis; Transverse cracking; Viscosity
• Old TRIS Terms: Critical temperature
• Subject Areas: Data and Information Technology; Highways; Pavements;

Filing Info

• Accession Number: 00207436
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 17 1972 12:00AM