Study the Addition of Styrene–Butadiene Rubber Latex on the Workability and Flexural Strength of Crumb Rubber-Mortar

Abstract

In this research different mixes were prepared with Cement-Sand ratio (1:3) and Water- Cement (0.5) by weight. Four sets were prepared by partially or full replacing the sand with crumb rubber tire to fabricate the Crumb Rubber-Mortar mixtures. The first  two sets include fine crumb rubber with particles size (0.3-1 mm), The other set include coarse crumb rubber with particles size (1.18-2.36 mm).The second two sets were prepared as the same first sets but with the addition of (7%) SBR latex by weight of cement. Each set was consist of different percentage of replacing the sand by crumb rubber (10,30,50,100%) by volume. Tests were conducted, both in fresh and in hardened state. fresh state test included workability, while hardened state test included flexural strength. Several results were obtained and it was including that the fineness of Crumb Rubber-Mortar play a major role in measuring workability and flexural strength and the addition of SBR to Crumb Rubber-Mortar improve the properties also the increase in crumb rubber percentage cause decrease in flexural strength and workability of fine Crumb Rubber-Mortar, while the increase in crumb rubber percentage cause increase in workability of coarse Crumb Rubber-Mortar.

Keywords: Mortar, Recycled Crumb Rubber, Styrene–Butadiene Rubber, Workability, Flexural Strength, Particles Size.