Rutting Resistance Ability Related to Asphalt-Aggregate Bonding Based on Surface Energy Analysis

The cohesive and adhesive bond strength of the asphalt-aggregate system, sensitive to environment temperature, will impact asphalt pavement rutting resistance. This paper used the Whihelmy plate method to test the change process of surface free energy of AH70 asphalt and styrene butadiene styrene (SBS) modified asphalt in the range of 20°C to 70°C. Surface free energy of aggregates was measured by contact angle meter. The results show that the surface energy decreased as temperature increased. When the temperature exceeds the asphalt binder softening point, the adhesion bonding of asphalt-aggregate will reduce. The adhesion between asphalt and limestone or basalt is higher than that between asphalt and diabase or sandstone. By analyzing the correlation of surface energy parameters and dynamic stability of the six types of asphalt mixture, a linear correspondence between the surface energy at 60°C and rutting resistance is derived. This research may provide a theoretical basis for the optimization of selecting asphalt and aggregate and rutting preventive maintenance.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 189-199
  • Monograph Title: Pavement Materials, Structures, and Performance

Subject/Index Terms

Filing Info

  • Accession Number: 01527752
  • Record Type: Publication
  • ISBN: 9780784413418
  • Files: TRIS, ASCE
  • Created Date: May 22 2014 3:03PM