An Experimental Study on Ternary Blended Fibre Reinforced concrete with Basalt Fibre and Steel Fibre

Abstract

Concrete is a popular building material because of its great compressive strength, durability, and availability of sub-components. The strain at fracture and tensile strength of normal concrete are extremely poor. Simple concrete usually contains multiple micro-cracks and fails due to a lack of tensile strength under continuous loading conditions. Concrete is strengthened with fibres to increase tensile and flexure strength. Fibre-reinforced concrete's primary function is to monitor cracking and thus provide some post-cracking ductility. The aim is to compare the performance of fibres on the mechanical properties of M30 grade concrete and to find the optimal fibre concentration. Fibres are added by 0.5%, 1%, 1.5% and 2% in concrete. Ternary blended concrete was considered in the study. Cement is partially replaced by GGBS with 30% and Dolomite powder 10% respectively. The study took in to account the replacement to reduce the CO2 emission while also conserving natural resources. Total 8 mixes are prepared with fibre proportions. Different concrete specimens such as cubes, cylinders and beams are prepared with different proportions of fibres. Prepared concrete specimens were tested at 3, 7& 28days. The inclusion of fibres resulted in significant improvements in compression, flexure, and split tensile strength in experimental test results.