Study of Crumb Rubber Modified Local Asphalts Using Classical Tests

  • Diyar Nadhim Hasan Shwan Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region, Iraq.
  • Aso Faiz Saeed Talabany Department of Civil Engineering, College of Engineering, Salahaddin University-Erbil, Kurdistan Region, Iraq.
Keywords: Modified Asphalt; CRM; Recycled tire; Classical Asphalt tests.


The rapid growth of population and industrialization levels around the world requires higher number of vehicles for transportation and better road qualities, on one hand, on the other hand this growth causes a huge number of scrap tires. These two problems can be solved together by incorporating scrap tires into the asphalt pavements to improve its properties and recycle the scrap tires. The objective of this study is to investigate the effect of Crumb Rubber Modifier (CRM) on the asphalt properties using classical tests. Different percentages of CRM by weight of the asphalt was added to three locally produced asphalts of different sources and grades. The results of this study show that higher CRM contents lead to decrease penetration and ductility values, while it causes increase of the softening point, elastic recovery and penetration index. Higher softening point and elastic recovery indicates better resistance against rutting and high temperature deteriorations, higher penetration index indicates lower temperature susceptibility.


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How to Cite
Nadhim Hasan Shwan, D. and Faiz Saeed Talabany, A. (2019) “Study of Crumb Rubber Modified Local Asphalts Using Classical Tests”, Zanco Journal of Pure and Applied Sciences, 31(6), pp. 23-29. doi: 10.21271/ZJPAS.31.6.3.
Mathematics ,Physics and Engineering Researches