International Research Journal of Education and Technology

The massive constructions like bridges, high-rise buildings, tunnels linings, and irrigation structures etc need high strength of concrete like M30, M40, up to M80. We have different methods for producing high strength to the concrete like fiber reinforced concrete, use super plasticizers, additives etc in concrete. In this thesis we are using reinforced polypropylene as an additive To boost concrete strength, it is important to integrate polypropylene and steel fibres into the mix. Reinforcement resin is widely used in the building industry to add strength to cement-based materials. Having only a single type of fibre in concrete can boost its efficiency. In cases with two fibre types, hybrid fibre may compensate the drawback of these two fibres. This article addresses the influences of the properties of steel-polypropylene composite on the consistency of reinforced concrete. This mixture use two different forms of fibre which are steel and polypropylene. The optimum sum of steel and polypropylene is used in order to achieve the optimum value of 2 percent S & 0.30 percent P. The slump test was performed for each mix in the fresh state. In the hardened condition of steel fibre-reinforced concrete, break tensile strength and flexural strength of reinforced steel fibre concrete, polypropylene concrete and composite concrete as well as standard concrete were seen at about 21 days and with full strength at 28 days..

Keywords— Concrete, Steel fibers, Polypropylene fibers, Hybrid fibers, Compressive strengths. Introduction