An experimental study has been conducted to investigate the effect of polypropylene fibre on concrete with addition of fibres and fly ash. In this study nine different volume fractions (0%, 0.05% ,0.1%, 0.15%, 0.2%, 0.25%, 0.30%, 0.35%, 0.40%) were used. From the basic test conducted we come know that addition of polypropylene fibre has a little adverse effect on the workability of concrete containing fly ash. With the increase in fibre volume, both the slump value and slump flow are decreasing

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... gradually. However, the addition of polypropylene fibre and fly ash has greatly improved the strength in hardened concrete tests. Moreover, there is a tendency of increase in cracking resistance when compared to other concrete composites without fibre and fly ash. There have also been several advances made in the development of fibre reinforced concrete to control cracking and crack propagation in plain concrete, and to increase the overall ductility of the material. However, there are now many types of fibres with different materials and geometric properties, but the exact fracture behaviour of fibre reinforced concrete materials is not clearly understood. Majorly, synthetic fibre has played a dominant role for a long time in a variety of applications for their high specific strength and modulus.