The effect of tire ash to the compressive strength of concrete

Abstract

The purpose of this study was to determine the effect of the addition of tire ash as a partial replacement of cement for concrete slumps. This study has experimented with cylindrical specimens with a diameter of 150 mm and a mixture length of 300 mm. It was planned to establish a cement water factor of 0.49 with the concrete compressive strength 25 MPa and a reduction plan of 60-180 mm, the percentage of tire ash substitution from the weight of cement 2.5%, 5%, 7.5%, and 10%, the cement used in this study was PCC type I cement from PT. Semen Padang. The results of the use of tire ash as a substitution showed that the greater the addition of tire ash, the greater the value of the slump obtained, meaning that the concrete produced is thinner so that it can facilitate the processing and compaction process. The use of tire ash cannot influence the increase or the same as of the concrete compressive strength and cannot be used as a substitute or reduction in the use of cement with the type I composite cement produced by PT. Semen Padang. Further research is needed on the content of the physical and chemical properties of tire ash.