The Evaluation of Mechanical Rheology on Rubber Asphalt Modification

Abstract

Scientifically natural rubber can be used as an asphalt modifier. Natural rubber production in Indonesia is dominated by crumb rubber products. Based on the technology developed by the addition of natural rubber can improve the rheology properties of asphalt. Therefore, this research used SIR 20 crumb rubber by evaluating the mechanistic rheological properties of asphalt mixtures. The purpose of this research to analyze of effect adding crumb rubber to asphalt Pen 60/70 toward the mechanistic rheology parameters to analyze the bitumen stiffness modulus (E *) that occurs with rubber modified asphalt.In order to obtain optimum levels of addition of rubber into asphalt pen 60/70. The method of this research was carried out in two stages, the first was to make a mixture of Pen 60/70 asphalt and crumb rubber on a variation of crumb rubber content, namely 0%, 4%, 6%, 7%, 8%, 9%, 10%, and 20 % while the second is to test the mechanical rheological properties performed with a Dynamic Shear Rheometer (DSR). The results of this study indicate that the value of Bitumen Stiffness Modulus (E *) has decreased in line with the addition of SIR 20 Crumb Rubber content. The optimum level of addition of SIR 20 crumb rubber is on adding 9% of SIR 20 crumb rubber content to asphalt pen 60/70.