Destructive and Non-Destructive Analysis of Polypropylene Fibre Reinforced Concrete

Abstract

Plain Cement Concrete (PCC) is brittle and has low tensile strength. The brittleness can be avoided by adding fibre. Fibre-reinforced concrete (FRC) is concrete containing fibrous material spread across concrete, which increases its structural integrity. Addition of fibres to concrete makes it an isotropic material and converts its brittle behaviour to ductile behaviour. In the Fibre Reinforced Concrete, polypropylene fibres are rationally combined to produce a cementitious composite that derives benefits from each of the individual fibres and exhibits a synergistic response. Based on I.S. Code method of mix design, proportion of different ingredients was obtained to get M30 grade concrete. Samples were prepared with varying the volume fraction of fibres from 0.50% to 2.50%. The optimum dosage is determined from among the above mixes. The result shows that optimum dosage is obtained at 1.50% addition of fibre. The main aim of the present experimental investigation was to use different volume fractions of polypropylene fibres to produce FRC and thus to evaluate its performance by comparing Destructive tests such as compression, tension, flexure and Non-destructive tests such as Rebound Hammer, Ultrasonic Pulse Velocity and Durability Parameters such as Water Absorption, Sorpitivity etc., .From the results obtained fibre reinforced concrete shows higher values than normal concrete under Compression, Split Tensile and Flexural Strength. The water absorption is reduced for FRC compared to Normal Concrete.