Enhancing Asphalt Pavement Performance Using Recycled Materials
Prof.Musharraf Zaman
University of Oklahoma, USA
Time：2018年7月25日（周三）上午10:30
地点：安中大楼A322
Abstract: With increased environmental awareness, using reclaimed asphalt pavement (RAP) and reclaimed asphalt shingles (RAS) in pavements has been gaining momentum in Oklahoma. Despite many advantages, there are concerns associated with fatigue and low-temperature cracking potential of pavements containing increased amounts of RAS and RAP. Fatigue performance of asphalt pavements containing varying amounts of these recycled materials will be discussed in light of laboratory and field test results. Resulting changes in binder grades and input parameters for mechanistic design of pavements will be discussed. In general, use of RAP or a blend of RAP and RAS improves the fatigue life. But, increasing the amount of these recycled materials beyond certain levels reduces the fatigue life. Use of RAP generally leads to increased stiffness and improved resistance to rutting, but low-temperature cracking resistance may be compromised. A comprehensive survey of state DOTs in the U.S. indicates need for developing specifications for design of asphalt mixes containing RAP and RAS.
Bio:Musharraf Zaman holds the David Ross Boyd Professorship and the Aaron Alexander Professorship in Civil Engineering and Environmental Science, and Alumni Chair Professorship in Petroleum and Geological Engineering at OU. He served as the Associate Dean for Research and Graduate Programs in College of Engineering from July 2005 to December 2013. During his 35 plus years of service at OU, he has received more than $30 Million in external funding, published 172 journal and 224 peer reviewed conference proceedings papers and 12 book chapters, and served on the editorial boards of several highly prestigious journals. During the past fifteen years, he has introduced a graduate-level multidisciplinary research program in asphalt area (annual research expenditures of more than 1 Million) and developed two new laboratories: Broce Asphalt Laboratory and Asphalt Binders Laboratory. He has supervised 79 master theses and doctoral dissertations to completion. He has been serving as the Director of Southern Plains Transportation Center (SPTC) since October 2013. He also has been serving as the Editor-in-Chief of the International Journal of Geomechanics (IJOG), ASCE since 2009. He is a member of the Technical Publication Committee, ASCE. His research papers have own international-level awards from the International Association for Computer Methods and Advances in Geomechanics (IACMAG) and Indian Geotechnical Society. In 2011, he won the prestigious Outstanding Contribution Award, given by IACMAG, for life-long contributions in geomechanics.