Brief Project Description: The use of recycled asphalt shingles (RAS) in transportation infrastructure has been extensively studied throughout the United States and elsewhere. An impediment in the wide-spread use of RAS in asphalt concrete has been the increased premature cracking potential of such mixtures due to the aged and brittle nature of asphalt binder in RAS. This has resulted in restrictions on RAS usage in hot- and warm-mixed asphalts by many agencies. The Vermont state law (10 V.S.A. § 6605m) requires that asphalt shingles, predominantly generated as “Architectural Waste”, be recycled, when a recycling facility exists within 20 miles. Due to concerns associated with their usage in asphalt concrete layers of pavement structures, their use within lower pavement layers needs to be explored.
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Additional Materials
Lead Researcher (Similar to Presenter in past Symposiums): Eshan Dave, eshan.dave@unh.edu
Additional Researchers: Jo E. Sias and Gabriele Tebaldi
VTrans Champions: Ian Anderson, Callie Ewald