United States Department of Transportation
i
Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements
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2020-04-01
[PDF-879.03 KB]
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Edition:Final Report
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Abstract:Addition of ground tire rubber (GTR) to asphalt binder and mixture is an accepted asphalt mixture practice in asphalt production that consumes about 12 percent of the total GTR market today. Modification of asphalt binders with GTR is well established and can provide high performance pavements that aid in reduction of the number of waste tires disposed of in landfills and elsewhere. This informational brief presents a review and update of the various processes for use of recycled tire rubber (RTR) in production of asphalt pavements. The objective is to provide knowledge for resource responsible use RTR to promote sustainable use in asphalt pavements. RTR is available in a variety of physical forms including: whole tires, stamped items, chunks, shreds, chips, crumb, and ground. The scope of this report is limited to use of RTR from whole scrap tires through size reduction and grinding, to the particle size range defined by industry as GTR. The report also includes information related to specifications and testing of GTR-modified asphalt binders, as well as additional considerations for GTR-modified asphalt mixture designs.
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