CHARACTERIZATION OF CRUMB RUBBER-MODIFIED BINDER USING STRATEGIC HIGHWAY RESEARCH PROGRAM TECHNOLOGY

The objective of the study was to characterize several different types of crumb rubber-modified binders and to develop information relating their properties. Different concentrations, gradations, and asphalt cement sources were evaluated to determine what effect these had on the properties of the modified binders. The asphalt cement and rubber were reacted at 177 deg C (350 deg F) until the stiffness had reached a maximum level. Tests were performed to evaluate both the reaction properties and the final properties of the binders. The concentration was found to have the largest effect on the final properties of the binders. The asphalt cements used in the study had little effect on the rubber-asphalt cement reaction. Strategic Highway Research Program (SHRP) binder properties indicated that the asphalt rubber binder performed better than an AC-20 asphalt cement used for comparison. Conventional asphalt tests were also performed on the mature binders. The softening point was found to produce results similar to those of the SHRP tests and may offer a method for field verification for asphalt rubber binders.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 21-31
  • Monograph Title: Unmodified and modified asphalt binders
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00714790
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Nov 29 1995 12:00AM