USE OF GROUND TIRE RUBBER IN ASPHALT CONCRETE PAVEMENTS--A DESIGN AND PERFORMANCE EVALUATION

North Carolina State University, with support from the North Carolina Department of Transportation, has explored the design and performance of two types of rubberized pavements: ground rubber mixed with an asphalt binder at elevated temperatures (wet process) and rubber mixed with a gap-graded aggregate before the addition of asphalt cement (dry process). The wet process mixtures contained 11% ground tire rubber by weight of the binder. The dry process mixtures incorporated 2% ground tire rubber by weight of the aggregate. The Marshall and the Corps of Engineers gyratory testing machine (GTM) procedures were used to design conventional dry process and wet process surface course mixtures. These mixtures were tested with respect to resilient modulus, creep, and fatigue to obtain input parameters for a computerized performance prediction model. The addition of rubber was found to increase asphalt demand by 0.5% for the dry process and 1.5% for the wet process. The performance model estimated that the new rubberized pavement systems would have shorter service lives compared to a new conventional pavement system. When the wet process mixture was used to overlay a distressed conventional system, it performed as well as an equal thickness of a conventional overlay.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1995/1515/1515-002.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=USE+OF+GROUND+TIRE+RUBBER+IN+ASPHALT+CONCRETE+PAVEMENTS--A+DESIGN+AND+PERFORMANCE+EVALUATION&author=G.+Malpass&author=N.+Khosla&publication_year=1995
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1515, Recycled Tire Rubber and Other Waste Materials in Asphalt Mixtures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Malpass, Glen A
  • Khosla, N Paul
• Publication Date: 1995

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 11-17
• Monograph Title: Recycled tire rubber and other waste materials in asphalt mixtures
• Serial:
  • Transportation Research Record
  • Issue Number: 1515
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt content; Computer models; Creep; Crumb rubber; Fatigue (Mechanics); Forecasting; Gyratory testing machines; Mix design; Modulus of resilience; Performance; Service life
• Uncontrolled Terms: Dry process; Marshall mix design; Performance prediction; Wet process
• Old TRIS Terms: Gyratory tests
• Subject Areas: Design; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00715659
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Jan 26 1996 12:00AM