DESIGN AND EVALUATION OF ASPHALT CONCRETE WITH RESPECT TO THERMAL CRACKING

THERMALLY INDUCED CRACKING OF ASPHALT PAVEMENTS INVOLVES TENSILE STRESSES, THEREFORE, A SUITABLE TEST METHOD SHOULD NECESSARILY UTILIZE THESE STRESSES. A REVIEW OF THE LITERATURE REVEALS A VARIETY OF METHODS AVAILABLE FOR THE TENSION TESTING OF ASPHALT CONCRETE AND PLAIN ASPHALT BITUMENS. IN VIEW OF ITS ACCEPTANCE AS A TEST METHOD FOR CONCRETE CYLINDERS, THE TENSILE SPLITTING TEST WAS INVESTIGATED AS A POSSIBLE APPROACH TO EVALUATING THE TENSILE STRESS-STRAIN CHARACTERISTICS OF ASPHALT CONCRETE AT LOW TEMPERATURES. A METHOD OF CONDUCTING THE TENSILE SPLITTING TESTS ON ASPHALT CONCRETE SPECIMENS WAS DEVELOPED WHICH IS CONSIDERED SUFFICIENTLY PRACTICAL TO BE USED AS A ROUTINE TEST. PREVIOUS CONCLUSIONS REGARDING THE EFFECTIVE ASPHALT CEMENT SUPPLY ON THE TENSILE PROPERTIES OF A GIVEN MIX AND ON THE OCCURRENCE OF CRACKING, HAVE BEEN SUBSTANTIATED. THE OCCURRENCE OF CRACKING WAS FOUND TO INCREASE AS THE FAILURE STRAIN DECREASED. FAILURE STRAIN IS CONSIDERED TO BE MOST SIGNIFICANT PARAMETER RESULTING FROM THE TENSILE SPLITTING TEST. FAILURE STRAIN APPEARS TO BE A FUNCTION OF THE ASPHALT CEMENT SUPPLY WHEN THE SAME AGGREGATE AND GRADE OF ASPHALT CEMENT IS USED. THERE ARE SOME INDICATIONS OF MIXES WHICH HAVE HIGH MARSHALL STABILITY VALUES AT 140 F, HAVE LOW FAILURE STRAINS AT 0 F. THE TENSILE SPLITTING TEST METHOD DEVELOPED IS CONSIDERED TO BE VALID AND WARRANTS INCLUSION IN A DESIGN METHOD FOR ASPHALT CONCRETE USED IN COLDER CLIMATES.

• Supplemental Notes:
  • pp 1-c3, 15 FIG, 17 REF, 3 APP
• Authors:
  • Anderson, K O
  • Hahn, W P
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1968-2

Subject/Index Terms

• TRT Terms: Asphalt cement; Asphalt concrete; Asphalt pavements; Deformation curve; Failure; Low temperature; Marshall test; Pavement cracking; Pavement design; Strain (Mechanics); Tensile strength; Tension; Tension tests; Test procedures; Thermal stresses
• Uncontrolled Terms: Tensile stress
• Old TRIS Terms: Marshall stability marshall stability & flow test flow; Strains
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00210761
• Record Type: Publication
• Files: TRIS
• Created Date: May 24 1994 12:00AM