Tarrahan Parseh Transportation Research Institute International Journal of Transportation Engineering 2322-259X 4 2 2016 10 01 Evaluating the Performance of Crumb Rubber Modified Binders used in Isfahan Province 97 107 40535 10.22119/ijte.2016.40535 EN Ahmad Goli Assistant Professor, Department of Transportation Engineering, University of Isfahan, Isfahan, Iran Hasan Ziari Professor, Department of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran A. Amini MSc. Grad., Department of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran Journal Article 2014 03 09 The performance of asphalt binders at high and low temperatures has an important role on the rutting and cracking<br />resistance of asphalt pavements. Crumb Rubber Modified (CRM) is one of the asphalt modifiers that improves asphalt<br />physical and mechanical properties and helps reducing environmental pollution. In this research, three unmodified<br />and six CRM modified binders were tested using the Superpave test and Performance Grading (PG) system. The Multiple<br />Stress Creep and Recovery (MSCR) test was used to assess rutting resistance of rubberized binders. The study<br />compared the results of this classification with the 7 performance grade binders required for specific climatic zones<br />in Isfahan Province. The results show that, CRM improves asphalt’s physical and mechanical properties at service<br />temperatures and decrease in the non-recoverable compliances (Jnr) in MSCR test. Moreover, CRM binder is sufficient<br />for the required PGs, while based on MSCR test, it cannot fully cover the traffic level requirements in Isfahan<br />Province. http://www.ijte.ir/article_40535_4d9d05d77cf26dc3bf32f66728a43787.pdf