CASE STUDIES OF PAVEMENT SHRINKAGE CRACKING AS FEEDBACK FOR A DESIGN SUBSYSTEM

LOW-TEMPERATURE SHRINKAGE CRACKING OF PAVEMENTS IN ONTARIO AND IN OTHER PROVINCES OR STATES HAS SERIOUS IMPLICATIONS WITH RESPECT TO ACCELERATING LOSSES IN SERVICEABILITY OF THESE PAVEMENTS. TO DATE, MOST RESEARCH EFFORTS HAVE CONCENTRATED ON THE CAUSES OF THE PROBLEM WITH LITTLE ATTENTION TO ANY PRACTICAL DESIGN METHODOLOGY. A NUMBER OF FLEXIBLE PAVEMENT SECTIONS IN ONTARIO WITH WIDELY VARYING DEGREES OF CRACKING WERE EXAMINED. PREVIOUSLY DEVELOPED LABORATORY TECHNIQUES TO DETERMINE THE LOW-TEMPERATURE PROPERTIES OF THE BITUMINOUS LAYERS WERE EXTENDED AND MODIFIED. RELATIVELY SIMPLE, RELIABLE, AND LOW-COST APPARATUS FOR THIS PURPOSE WAS DEVELOPED AND APPEARS TO BE USABLE FOR ROUTINE DESIGN. THE CASE STUDIES INDICATED THAT HIGH CRACKING FREQUENCIES WERE ASSOCIATED WITH STIFF BITUMINOUS SURFACES AT LOW TEMPERATURES AND THAT CRACKING COULD BE CORRELATED WITH THE PREDICATED FRACTURE TEMPERATURE OF THE MIXTURE. THEY ALSO INDICATED THAT THE MOST DOMINANT VARIABLE AFFECTING FRACTURE SUSCEPTIBILITY WAS ASPHALT SOURCE AND THAT, IN ORDER TO ACHIEVE A CERTAIN CRACKING FREQUENCY, A "HARD" ASPHALT FROM ONE SOURCE COULD BE EQUIVALENT TO A "SOFT" ASPHALT FROM ANOTHER SOURCE, DEPENDING ON THEIR LOW-TEMPERATURE STIFFNESS PROPERTIES. THE USE OF INFORMATION FROM THIS STUDY IN REFINING A PREVIOUSLY DEVELOPED DESIGN SUBSYSTEM FOR LOW-TEMPERATURE RESPONSE HAS BEEN INDICATED. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/313/313-003.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Mechanical Properties of Bituminous Paving Mixtures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Haas, R C G
  • Phang, W A
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 32-43
• Monograph Title: Bituminous Materials, Mixes, and Compaction
• Serial:
  • Highway Research Record
  • Issue Number: 313
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt; Bituminous mixtures; Cracking; Flexible pavements; Fracture mechanics; Low temperature; Pavement cracking; Pavement design; Shrinkage; Stiffness
• Uncontrolled Terms: Fracture; Sources
• Old TRIS Terms: Shrinkage cracks
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00205835
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Oct 26 1970 12:00AM