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Abstract:Over 250 million scrap tires are generated
annually in the U.S. Historically, a significant
portion of these tires have been processed into
finely ground tire rubber (GTR), or crumb rubber,
for use as an additive in hot mix asphalt (HMA)
pavements to improve pavement performance.
Recently, improved synthetic polymer additives
have been developed that more economically
provide the same performance improvements as
GTR. This development has decreased the demand
for GTR in HMA, potentially freeing supplies of
GTR for other applications.
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