The aim of this research is to investigate the impact of crumb rubber and Styrene-Butadiene-Styrene (SBS) on rutting potential of porous asphalt mixtures. Optimal binder content of control mix, 5% SBS, and mixtures containing 10%, 15%, and 20% of crumb rubber were determined using Cantabro Loss test. | Rutting evaluation of rubberized and SBS modified porous asphalt mixtures Engineering Solid Mechanics 3 2015 253-262 Contents lists available at GrowingScience Engineering Solid Mechanics homepage esm Rutting evaluation of rubberized and SBS modified porous asphalt mixtures Hassan Ziari Bahram Shirini and Reza Imaninasab School of Civil Engineering Iran University of Science and Technology Tehran Iran ARTICLE INFO ABSTRACT Article history The aim of this research is to investigate the impact of crumb rubber and Styrene-Butadiene- Received 6 January 2015 Styrene SBS on rutting potential of porous asphalt mixtures. Optimal binder content of Accepted 2 June 2015 control mix 5 SBS and mixtures containing 10 15 and 20 of crumb rubber were Available online determined using Cantabro Loss test. Dynamic creep wheel tracking draindown and falling- 4 June 2015 Keywords head permeability tests were then carried out on specimens to examine rutting resistance Porous asphalt resistant to draindown and permeability. SBS modified and 10 rubberized asphalt satisfied Permeability all the requirements of porous asphalt design criteria. They also have similar rutting Rutting resistance performance permeability. Except for rutting performance 10 rubberized asphalt has the Wheel tracking best performance. Instead asphalt mixture containing 20 crumb rubber was the most mixture against rutting resistance. 2015 Growing Science Ltd. All rights reserved. 1. Introduction Porous asphalt is gap-graded coarse mixture containing approximate air void content of 20 . It is mainly used for water drainage which avoids puddle formation and improves sight vision while raining. Moreover sound absorption property causes noise reduction and increases friction. Safety is enhanced due to drainage properties improvement and Hydroplaning phenomenon removal by porous asphalt mix PIARC 1993 . Regarding functional properties structural deficiency of this type of mixture increases life .
