A study on eco- friendly composite blocks incorporating scrap tyre rubber and steel slag as coarse aggregate with sisal fiber

Abstract

Global modernization trends result in significant updating of methodologies in constructional activities. This progression makes resources scarce. On the other hand, waste from industry is piling up of late and managing scrap is the principal concern faced globally. In the current scenario, the livelihood environment has noteworthy awareness of waste recycling. Globally, the throwaway problem is the most significant cause of environmental pollution. Recent growth in transportation has generated scrap rubber from automobiles. M30 geopolymer composite blocks incorporating scrap tyre rubber and steel slag as coarse aggregate were investigated. Scrap tyre rubber and steel slag were incrementally added at 0%, 5%, 10%, 15%, and 20% to replace coarse aggregate with sisal fiber for 5% fly ash. In the present work, basic properties were investigated and the mechanical properties of geopolymer composites were determined. It is found that compressive characteristics increased for the addition of 5% scrap tyre rubber with 5% sisal fiber of fly ash, but it declined for other combinations of 10%, 15%, and 20% scrap tyre rubber with 5% sisal fiber. Similarly, compressive characteristics increased for the addition of 5% steel slag with 5% sisal fiber for fly ash but declined for geopolymer composites with 10%, 15%, and 20% steel slag with 5% sisal fiber. The trend of increase is the same for scrap tyre rubber with sisal fiber and steel slag with sisal fiber for flexural characteristics. It reveals that M30 geocomposite blocks with 5% scrap tyre rubber, 5% sisal fiber and steel slag with 5% sisal fiber are optimal. Also, microstructural properties were studied.