Performance of Multiaxial Paving Interlayer–Reinforced Asphalt Pavement Webinar

  • Performance of Multiaxial Paving Interlayer–Reinforced Asphalt Pavement
  • 09/07/2016

Presenter(s)

  • Jenny Liu

  • Civil and Environmental Engineering
  • University of Alaska Fairbanks

Abstract

Paving interlayers have been used in asphalt concrete (AC) overlays for a variety of benefits. In cold regions such as Alaska and other northern states, pavements are more prone to distresses due to extreme climatic conditions. This webinar presents a study which has been conducted to explore how paving interlayers function in AC pavements in Alaska through laboratory investigation, pavement structural analysis, finite element method (FEM) analysis, and surveys from field test sections with three types of paving interlayers. The multi-axial interlayer provided the best overall laboratory performance in terms of stiffness, permeability, and resistance to cracking. The pavement structural analyses confirmed that using interlayer could improve fatigue crack resistance and extend service life. The FEM analysis indicated that the multi-axial interlayer could improve stress distribution more effectively than the two-yarn bi-axial interlayer. Preliminary results from field evaluation of test sections showed that pavement performance was improved if reinforced by interlayers, in terms of reduced amount and severity of cracking. Further monitoring of field test sections are recommended to give clearer projection of the utility of the paving interlayers in cold regions.

Speaker Bio(s)

Dr. Jenny Liu is a professor in the Department of Civil and Environmental Engineering at the University of Alaska Fairbanks. She received her M.S. and Ph.D. degrees in Civil Engineering from Texas A&M University, and her B.S. degree in Materials Science and Engineering from Tongji University, Shanghai, China. Over the last ten years she has secured over 10 million dollars of research funding to support her research in infrastructure materials and pavement engineering. She is the Director of CESTiCC, and currently serving as an Associate Editor for ASCE Journal of Materials in Civil Engineering, Chair of ASCE Bituminous Materials Committee, Director of ACI Alaska Chapter, and members of TRB committees of AFP70, AFK30, and AFK50, and ASCE committees of Highway Pavement and Geo-Institute Pavements. She is a registered Professional Engineer in Alaska and certified examiner for ACI Certifications of aggregate and concrete testing technicians. Her dedication to education and research, and commitment to professional communities have been recognized by many awards including UAF Dennis Demmert Award, Best Paper Award (twice), ASCE Outstanding Reviewer (twice), ASPE Fairbanks Chapter’s 2016 Engineer of the Year Award, and IACIP Outstanding Service Award.

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  • Center for Environmentally Sustainable Transportation in Cold Climates (CESTiCC)
  • PO Box 75 5900
  • Fairbanks, AK 99775-5900