ASPHALT PROPRETIES IN RELATION TO PAVEMENT PERFORMANCE

Six asphalt cements from different sources were used during 1964 in the construction of the pavements studied and reported in this paper. These asphalt cements ranged in viscosity at 140 F (60.c) from 966 to 2,649 poises (96.6 to 265 Pa-s) and in penetration from 62 to 149 units. Tests have been conducted to determine the properties of the original asphalts, as well as the asphalts recovered from time to time from the pavements in service. The performance of these test pavements was evaluated in 1974 by a team of eight evaluators. Changes in the asphalt properties have been observed to be a hyperbolic function of time. According to this study, viscosity or shear susceptibility of the aging asphalt alone does not, necessarily, indicate the pavement performance. The rate of gain in shear susceptibility relative to increase in viscosity at 77 F (25 C) seems to be one of the major factors affecting pavement performance. Asphalt ductility values, determined at 39.2 F (4.c) before and after pug mill mixing, seem to be consistent with the pavement performance observed so far. Higher ductility values are associated with better pavement performance.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-13
  • Monograph Title: Asphalt properties and performance
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00128537
  • Record Type: Publication
  • ISBN: 0309023998
  • Files: TRIS, TRB
  • Created Date: May 14 1976 12:00AM