ASPHALT FRACTURE

A BRIEF REVIEW IS CONTAINED OF THE CONCEPTS OF BRITTLE FRACTURE AND THEIR EXTENSION TO FRACTURE OF VISCOELASTIC MATERIALS. THE POSSIBILITY OF APPLICATION OF SUCH THEORIES TO CRACKING OF ASPHALTIC MATERIAL AT LOW TEMPERATURES IS DISCUSSED. A LABORATORY TECHNIQUE UTILIZING A NOTCHED BEAM SPECIMEN TO STUDY THE FRACTURE BEHAVIOR OF ASPHALTIC MATERIALS AT LOW TEMPERATURES IS DEVELOPED AND APPLIED TO THREE ASPHALTS OF DIFFERENT RHEOLOGIC PROPERTIES. THE EFFECTS OF PARAMETERS SUCH AS THE RATE OF LOADING, THE TEMPERATURE, AND THE DEPTH OF NOTCH ON THE ENERGY REQUIRED TO CAUSE FRACTURE ARE STUDIED. THE RESULTS OF THIS STUDY SHOW THAT THE STRAIN ENERGY RELEASE RATE AS CALCULATED FROM THE THEORY OF BRITTLE FRACTURE IS AN INHERENT PROPERTY OF THE ASPHALTIC MATERIALS, AND ITS VARIATION FROM ONE ASPHALT TO ANOTHER MAY BE USED TO DETERMINE FRACTURE SUSCEPTIBILITY OF THE ASPHALTS AT LOW TEMPERATURES. THE RESULTS ALSO SHOW THAT SIMILARITY IN RHEOLOGICAL RESPONSE OF ASPHALTS AT NORMAL TEMPERATURES (ABOVE 40F) DOES NOT NECESSARILY PROVIDE A SIMILAR RESPONSE AT LOW TEMPERATURES (BELOW 10F). /AUTHOR/

• Supplemental Notes:
  • Vol 36, pp 51-72, 22 FIG, 8 TAB, 13 REF
• Authors:
  • Moavenzadeh, F
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1967-2

Subject/Index Terms

• TRT Terms: Asphalt; Beams; Concrete tests; Cracking; Depth; Energy; Flexural strength; Fracture mechanics; Laboratory tests; Loads; Low temperature; Notch tests; Rheological properties; Strain (Mechanics); Structural tests; Temperature; Theory; Viscoelasticity
• Uncontrolled Terms: Loading rate; Strain rate
• Old TRIS Terms: Cracked asphalt
• Subject Areas: Bridges and other structures; Energy; Highways; Materials;

Filing Info

• Accession Number: 00210711
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 19 1994 12:00AM