Effect of Steel Fibre on The Flexural Strength of Self-Compacting Concrete

With the increase in demand in the construction industry Self-Compacting Concrete is becoming more popular due to its versatile nature of improved efficiency. But the SCC possesses some properties which makes it brittle under tensile forces. The behavior of SCC as a structural material can be improved with the addition of Steel Fibres in adequate amount. In fact, the fibre reinforcement mechanism can convert the brittle behavior of concrete into semi-ductile behavior of crack width that is acceptable under the structural design. Also, it improves the strength and ductility of the concrete member by improving the core confinement. The main objective of present work is, to study the influence of Steel Fibres on the workability and Flexure performance of SCC and to find the optimum percentage of steel fibre in the mix for better performance. The experimental investigation consists of M40 grade concrete. In this study fibre is added as 0.5%, 1%, 1.5% and 2% by the Volume fraction to study its influence on the fresh and hardened property of SCC. Various tests are conducted on concrete in its fresh and hardened state. The experimental investigation shows that with the increase in the fibre content the flexural strength of concrete also increases. The mix having 0.5%, 1% and 1.5% of fibres has adequate workability. In terms of compressive strength all mixtures satisfy the target compressive strength.