ASPHALT CEMENT DURABILITY AND AGGREGATE INTERACTION

THIS RESEARCH PROGRAM WAS AIMED TOWARD MATERIAL OPTIMIZATION THROUGH ASPHALT COMPOSITIONAL MEANS. THE PROBLEM AREAS OF ADHESION AND DURABILITY ARE INFLUENCED BY MANY FACTORS, SUCH AS THE CHARACTERISTICS OF THE ASPHALT, AGGREGATE PROPERTIES, MIXTURE DESIGN, ENVIRONMENT, CONSTRUCTION PRACTICES AND TRAFFIC LOADINGS. AN ATTEMPT WAS MADE TO DISCUSS THESE FACTORS IN LIGHT OF THOSE WHICH WERE CONTROLLABLE (PHYSICAL DESIGN OF THE MIXTURE) AND THOSE WHICH WERE UNCONTROLLABLE (GEOLOGICAL VARIATIONS). CONSIDERATIONS FOR THE CONTROL OF THE ASPHALT FELL INTO THE TWO AREAS OF ADHESION AND AGING (DURABILITY), BOTH UNCONTROLLABLE AT THIS TIME. THE RESEARCH INDICATED, AMONG OTHER THINGS, THAT: (1) ASPHALTS CAN BE BLENDED TOGETHER TO ACHIEVE PRACTICALLY ANY DESIRABLE VISCOSITY OR AGING INDEX OR COMBINATION OF BOTH; (2) VISCOSITY OF ASPHALTS DID NOT ALONE IMPROVE ADHESION QUALITIES; (3) THE SECOND ACIDAFFIN FRACTION OF AN ASPHALT IS THE MOST IMPORTANT FRACTION IN THE IMPROVEMENT OF DURABILITY, THE ACIDAFFIN FRACTION BEING A COMPONENT OF ASPHALT AS DETERMINED BY THE ROSTLER METHOD; AND (4) ASPHALTENES CONTRIBUTE THE MOST TOWARDS STRUCTURAL STRENGTH.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 84 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00214305
  • Record Type: Publication
  • Report/Paper Numbers: Final Rept
  • Files: TRIS, STATEDOT
  • Created Date: Apr 3 1974 12:00AM