Studies on Properties of Concrete Using Crumb Rubber as Fine Aggregate

The waste generated from the disposal of tyres, i.e., waste rubber, rubber products, and angle scrap is very high in volume raising serious environmental concerns. The disposal of this waste has become an environmental concern that needs to be attended to as quickly as possible. The effect of partial replacement of waste fine crumb rubber with sand are investigated on the cement concrete specimens. Due to the wide use of concrete in construction, the application of crumb rubber as a material of concrete would provide an efficient way of disposing the enormous amount of waste that is generated from scrap tyres. In this study, concrete with crumb rubber replacement 3, 6, 9, 12, and 15% is adopted. The objective of this paper is to establish the applicability of crumb rubber as a promising substitute to fine aggregate in conventional concrete. The potential advantage of using the crumb rubber in concrete is revealed through the tests such as compressive strength, split tensile strength and flexural strength. Even though the compressive strength of concrete is reduced to some extent in comparison to conventional concrete by replacing the crumb rubber by fine aggregate but the results showed a substantial increase compared to target compressive strength until 6% replacement.