Experimental investigation of the effects of using waste rubber ash on the mechanical properties of plain concrete

Document Type : Original Article


1 Babol Noshirvani University of Technology

2 Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran



The effects of using rubber ash on the mechanical properties of plain concrete are investigated experimentally in this study. In this study, experimental evaluations were performed to evaluate the effects of adding waste tire rubber ash to concrete by measuring the mechanical properties of the specimens. The main purpose of this study was to determine the proper fraction of rubber ash to be utilized in concrete by investigating the mechanical properties of concrete such as elasticity modulus, compressive strength, tensile strength, bending strength, and fresh concrete slump. Four different fractions of rubber ash (2.5%, 5%, 7.5% and 10% of cement weight) were added to concrete mixture. Based on the results achieved from the tests conducted on the specimens, it could be deduced that adding rubber ash to concrete considerably increases compressive and bending strength and reduces the slump flow. It also increases tensile strength and elasticity modulus at a lower level.


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