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100% recycled hot mix asphalt: A review and analysis
Institution:1. Worcester Polytechnic Institute (WPI), 100 Institute Road, Kaven Hall, Worcester, MA 01609, United States;2. RAP Technologies, 217 Belhaven Avenue, Linwood, NJ 08221, United States;1. Virginia Center for Transportation Innovation and Research, 530 Edgemont Road, Charlottesville, VA 22903, USA;2. Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, 325 John D. Tickle Building, Knoxville, TN 37996, USA;1. Texas A&M Transportation Institute, Flexible Pavements – CE/TTI, Room 309G, 3135 TAMU, College Station, TX 77843-3135, United States;2. Texas A&M Transportation Institute, College Station, TX 77843-3135, United States;3. Texas Department of Transportation, Austin, TX 21915, United States;1. Bahcesehir University, Ciragan Cad. No: 4, 34353 Besiktas/Istanbul, Turkey;2. Laboratory for Road Engineering/Sealing Components, EMPA, Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Duebendorf, Switzerland;1. Worcester Polytechnic Institute, 100 Institute Road, USA;2. EMPA Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
Abstract:A holistic evaluation of the feasibility of producing 100% recycled mixtures is presented. Eleven technologies readily available for producing 100% Reclaimed Asphalt Pavement (RAP) hot asphalt mixtures are described in the article and the complementary video (http://youtu.be/coj-e5mhHEQ). The recorded performance of 100% RAP mixtures is analyzed along with identification of typical high RAP distresses. Recommended mix design procedures and the best RAP management strategies are described. A cradle-to-gate analysis of environmental effects indicated 18 kg or 35% CO2eq savings per t of produced 100% RAP asphalt mixture compared to virgin mix, while cost analysis showed at least 50% savings in material related expenses.
Keywords:100% RAP recycling  Asphalt production  State-of-the-art  Rejuvenator  Asphalt cost  Sustainable pavement
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