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Edition:Final Report
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Abstract:Since 1990, VTrans and the Vermont Agency of Natural Resources (VANR) have had an interest in the repurposing of tire byproducts in transportation infrastructure, including the use of shredded whole scrap tires, known as Tire Derived Aggregate (TDA). Vermont’s universal recycling laws have made reliable quantities of material available, though a market for their use does not currently exist in Vermont. Instead, the approximately 700,000 scrap tires that Vermont generates per year are shipped out of state for processing and use [1]. These are mainly burned as Tire Derived Fuel (TDF) in paper mill boilers or cement kilns, with lesser amounts used for mulch, playground surfaces, and rubberized asphalt. VTrans is supporting the repurposing effort by researching methods to recycle and repurpose scrap tires. Since 1990 TDA has been used in several VTrans projects including a test side slope embankment in Middlesex, VT [2], a study on geotechnical properties of TDA [3], and documentation of 65,000 tires used as TDA in a capillary break layer beneath gravel roads in Georgia, VT [4][5].
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