Across the United States, about four out of every five homes have asphalt shingle roofs. Annually, as those roofs are replaced and maintained, about 12 tons of waste shingles are generated, and ...
The National Center for Asphalt Technology (NCAT) recently released guidance on recalibrating the structural asphalt layer coefficient in the AASHTO 1993 Design Guide. The AASHTO 93 design methods are ...
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