"OXIDATION" CRACKING OF ASPHALT PAVEMENT

AN APPARATUS WAS DEVELOPED TO STUDY THE WEATHERING OF THE ASPHALT-AGGREGATE SYSTEM. THE APPARATUS IS DESCRIBED. DURING THE WEATHERING PROCESS, THE PERMEABILITY, SONIC VELOCITY, AND QUANTITY OF WEATHERING FLUID WAS MEASURED AS A FUNCTION OF TIME. IT WAS CONCLUDED THAT NEITHER THE OXIDATION AND/OR THE EVAPORATION OF VOLATILES WAS THE CAUSE OF DEGRADATION OF ASPHALT-AGGREGATE MIX. DEGRADATION OF THE ASPHALT-AGGREGATE MIX IS ACCELERATED BY INCREASED TEMPERATURE AND INTERMITTANT EXPOSURE TO WATER. HEAT APPEARS TO BE RESPONSIBLE FOR THE REDISTRIBUTION OF THE ASPHALT WITHIN THE MIX. ADDITIONAL WEATHERING STUDIES IN PROGRESS INDICATE THAT AMBIENT TEMPERATURE CYCLING RESULTS IN EMBRITTLEMENT AS INDICATED BY AN INCREASE IN THE YOUNG'S MODULUS AND INCREASE OF UNCONFINED COMPRESSIVE STRENGTH. CYCLING WITH AIR AND WATER AT AMBIENT TEMPERATURE APPEARS TO CAUSE MINOR INCREASE IN EMBRITTLEMENT.

• Supplemental Notes:
  • Rept No 3, 20 PP, 13 FIG
• Corporate Authors:

  Mississippi State University, Mississippi State

  College of Engineering
  Mississippi State, MS  United States  39762
• Authors:
  • Oakes, D T
• Publication Date: 1969-8-8

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bituminous aggregates; Bituminous mixtures; Compressive strength; Modulus of elasticity; Oxidation; Temperature; Water; Weathering
• Uncontrolled Terms: Unconfined compression
• Old TRIS Terms: Degradation (Aggregate)
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211545
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 21 1970 12:00AM