Journal of Materials Science

, Volume 30, Issue 10, pp 2584–2590 | Cite as

A new look at rubber-modified asphalt binders

  • G. R. Morrison
  • S. A. M. Hesp
Papers

Abstract

The high-temperature rheological characteristics and the low-temperature fracture properties of asphalt binders containing crumb and devulcanized rubber waste have been investigated. Asphalt binders containing crumb rubber of different mesh sizes, with and without surface modification, and a commercially available binder containing devulcanized rubber, were tested and compared with an unmodified asphalt and three commercially available polymer-modified binders. Interfacial modification of asphalt systems containing crumb rubber was found to give binders that were far superior in their low-temperature performance to commercially available products. The data suggest that a crack-pinning or crack-blunting mechanism is responsible for the increase in toughness found in these systems. A commercially available binder containing devulcanized rubber showed reasonably good high-temperature properties; however, its low-temperature fracture performance was disappointing in that it was not significantly better than that of unmodified asphalt binders.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • G. R. Morrison
    • 1
  • S. A. M. Hesp
    • 1
  1. 1.Department of ChemistryQueen's UniversityKingstonCanada

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