Asphalt Pavement Industry Survey on Recycled Materials and Warm-Mix Asphalt Usage 2021 (PDF)
Brett A. Williams, J. Richard Willis, Ph.D., & Joseph Shacat
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The objective of this survey, first conducted for the 2009 and 2010 construction seasons, was to quantify the use of recycled materials, primarily RAP and RAS, as well as the use of WMA technologies by the asphalt pavement industry. For the 2021 construction season, the National Asphalt Pavement Association (NAPA) conducted a voluntary survey of asphalt mixture producers across the United States on tons produced, along with a survey of state asphalt pavement associations (SAPAs) regarding total tons of asphalt pavement mixture produced in their state.