DEVELOPMENT OF RUBBER AND ASPHALT BINDERS BY DEPOLYMERIZATION AND DEVULCANIZATION OF SCRAP TIRES IN ASPHALT

Scrap tires in three forms--crumb rubber 60 minus mesh, crumb rubber 20 minus mesh, and buffed rubber--were subjected to depolymerization and devulcanization by applying heat, high shear, and a combination of both. Different reaction temperatures and times of reaction were applied. The reaction products were submitted to the testing of rheological properties by measurement of creep and recovery, viscosity, and some conventional tests. The amount of unreacted rubber and tendency to separation during the hot storage were also tested. Selected materials were evaluated according to Strategic Highway Research Program (SHRP) specification and by the gel permeation chromatography. The results from the SHRP testing indicate that these materials are less temperature sensitive than conventional asphalts prepared from the same crude oil as the base asphalt. These materials were prepared in larger quantities and are being tested for their performance in paving mixes.

• Record URL:
  https://doi.org/10.3141/1530-07
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=DEVELOPMENT+OF+RUBBER+AND+ASPHALT+BINDERS+BY+DEPOLYMERIZATION+AND+DEVULCANIZATION+OF+SCRAP+TIRES+IN+ASPHALT&author=L.+Zanzotto&author=G.+Kennepohl&publication_year=1996
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/030905902X
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1530, Recycled Rubber, Aggregate, and Filler in Asphalt Paving Mixtures.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Zanzotto, L
  • Kennepohl, G J
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 51-58
• Serial:
  • Transportation Research Record
  • Issue Number: 1530
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Creep; Crumb rubber; Frost susceptibility; Gel permeation chromatography; Rheological properties; Solid wastes; Temperature; Test procedures; Tires; Viscosity; Vulcanization
• Identifier Terms: Strategic Highway Research Program
• Uncontrolled Terms: Scrap tires; Temperature susceptibility
• Old TRIS Terms: Depolymerization; Devulcanization; Hot storage stability
• Subject Areas: Highways; Materials; Vehicles and Equipment; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00728392
• Record Type: Publication
• ISBN: 030905902X
• Files: TRIS, TRB
• Created Date: Nov 7 1996 12:00AM