Effect of Tyre Waste on Ground Granulated Blast Furnace Slag (GGBFS) Based Concrete Blocks

Abstract

Objectives: To determine the effect of tyre waste on its addition to Ground granulated blast furnace slag (GGBFS) based Concrete Blocks in respect to compressive strength. Methods: Cube specimens of size 150 x 150 x 150 mm were casted with 45% replacement of cement by GGBS and tyre waste in different proportions 45%, 40%, 35%, 30% and 0%, 5%, 10%, 15% respectively. Cube specimens were kept in ambient conditions, so as to protect it from heat and cold, thus avoiding surface evaporation. After proper curing, compressive strengths were determined at 1, 3, 7, 14 and 28 days respectively. Findings: This research determined the exact quantity of tyre waste and GGBFS which can be used as a cement replacement in Concrete mix. It was found that maximum compressive strength was achieved at 45% GGBFS content and 0% Tyre waste content. Although tyre waste can be introduced up to 15% in the concrete mix and compressive strength is more than only OPC based concrete mix. Novelty: According to the findings of the comprehensive study, use of tyre waste at 15% and GGBFS at 30% in concrete mix reduces the requirement of cement, which finally plays a major role in reduction of construction cost by use of cheap tyre waste and less cement. It encourages us to use tyre waste on a larger scale in construction, along with the protection of environment. Keywords: Ground granulated blast furnace slag; compressive strength; tyre waste; Ordinary Portland Cement; Environment friendly