The Utilization of Silica Fume in Mortar Mixed with Rubber Crumb

Abstract

This study looks closely at how rubber crumbs and additives might improve the mechanical properties of mortar concrete. It is focused to help the concrete industry transition this form of mortar concrete from a research laboratory level to a more useful usage. On the compressive strength, density, and water absorption of mortar concrete, the effects of various mixing techniques, mechanical which was before mostly on crumb rubber, and the use of fiber additions have been investigated. Mixing duration and order were two factors in the mixing technique. The replacement of fine aggregate with rubber crumb in the mortar was conducted from 0% (control sample), 5%, 10%, and 15% with fixed 5% of silica fume (replaced cement amount). A size of 50mm x 50mm x 50mm was used as a designing size cube sample in the current study. All blends should be subjected to a slump test before being used to determine the combination's level of durability. The water absorption and density value showed a good result giving benefits and advantages on increases of crumb rubber amount. However, compressive strength decreased when the amount of crumb rubber increased. In the application of roof tiles, lower density values provide an advantage for workability during installation.