Mechanical properties of high strength concrete using eco-friendly construction materials

摘要

In this study, the mechanical property of concrete which is produced by adding agricultural wastes, steel fibres, and bi-products is investigated. M50 grade of concrete containing silica fume for 10% by weight of binder, M-sand for 40% by weight of riversand, coconut shell for 20% by weight of coarse aggregate and 3% of three different fibres at different proportion with water/ binder ratio 0.33. Though silica fume enhances pozzolanic characteristics, it demands addition of superplasticiser. Coir, sisal and steel fibres are used in this study. The compressive, flexure, split tensile, Impact strength and water absorption were studied at different ages under normal curing. The mechanical properties were higher with 2% metallic steel fibre in the modified concrete. Amongst the coir and sisal fibres, sisal proved better for compressive, flexural and tensile strength. Energy absorbance is found to be equally effective in sisal and steel fibre. Water absorption is high in which the coir content. It is observed that coir, sisal fibres increases workability as well mechanical properties to certain extent thus obtained a guideline of making eco-friendly and consfructible concrete.