DETERMINING MECHANICAL PROPERTIES OF CONCRETE WITH PARTIAL REPLACEMENT OF FINE AGGREGATE BY TIRE RUBBER CRUMB

Abstract

The environment will be critically polluted if the enormous amount of rubber tyres is not adequately reprocessed and disposed of. One of the feasible solutions to the reduction of wastes is using recycled crumb rubber particles in concrete. In this research waste tire rubber were used to study the effectiveness of concrete with replacement of tire rubber crumb in conventional concrete. The rubber crumb were prepared and replacing by 11%, 13%, 15% and 17% of fine aggregate in terms of the density. The concrete cubes were prepared in size of 150 x 150 x 150 (mm) and tested for compressive strength test. The ductility of the concrete were studied by getting the deformation of the cube through dial gauge and plotted the stress strain curve. It was found that the workability of the concrete mix reached its highest slump value in sample with 11% of rubber crumb replacement which was 97mm, and the slump value decreased when the percentage of rubber crumb replacement increased. Overall, the results obtained for compressive strength of the concrete cubes with rubber crumb replacement achieved a lower compressive strength than the control sample. As well, all of the concrete cube samples with rubber crumb replacement obtained a higher strain than that of the control sample.