Understanding the Blending and Diffusion of Recycled Asphalt in Paving Mixtures
04 Dec 2019, 2:30 pm
Asphalt pavements covers over 93 percent of the paved roads in the United States. The use of recycled asphalt into pavement maintenance and construction has been a common practice. However the lack of understanding of the interaction between recycled and virgin asphalt poses a change on the efficient use of recycled asphalt, and often causes pavement premature failures. The present study addressed some fundamental aspects associated with the beneficial use of recycled asphalt into asphalt paving mixtures: 1) how much recycled asphalt can be mobilized into a uniform asphalt coating in the mixture? and 2) will the mobilized old asphalt co-mingle with virgin asphalt to form a homogeneous material? Analytical chemical procedure and fluorescence microscopy (FM), and molecular dynamics simulation have been utilized for the analyses. The results have provided better understandings on the homogenization process between the recycled and virgin asphalt; thus provide better guidance to efficient use of recycled asphalt pavements.
Baoshan Huang, Ph.D.,P.E, is the Edwin G. Burdette Professor of Civil Engineering at the University of Tennessee-Knoxville, where he has been employed since January 2002. He earned his Bachelor's and Master's Degrees at Tongji University in China and a Ph.D. at Louisiana State University. His areas of research include transportation infrastructure materials, pavement engineering, geotechnical engineering, and infrastructural asset management. Over the last fifteen years of his professional career, Dr. Huang has secured over ten million dollars of research funding to support his research activities. He has been actively involved in many professional committees, including the Transportation Research Board (TRB), Association of Asphalt Paving Technologists (AAPT), American Society of Civil Engineers (ASCE), and the International Society of Asphalt Pavement (ISAP). He was the chair of the ASCE Bituminous Materials Committee (BMC) during 2010-2012, and has been associate editors for the ASCE Journal of Materials in Civil Engineering, Journal of Transportation Engineering - Part B: Pavements, Journal of Cleaner Production, and serves in editorial boards for several international journals. Dr. Huang has published over 180 (SCI Indexed) journal papers and holds five US patents (one pending), one International patent, and three Chinese patents (two pending) on innovative infrastructure materials design and characterization.
Huang, Baoshan, "Diffusion and Uniformity of Recycled Asphalt in Pavements" (2019). Abbett Distinguished Seminar Series. 1.
Civil, Architectural and Environmental Engineering
Center for Intelligent Infrastructure
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