A Critical Study of Composite Fiber Reinforced Concrete with the Partial Replacement of Cement by flyash

Concrete is a most versatile material it can be used in typical environmental condition like extreme cold & hot weather, under any chemically surcharged and atomic reactor. Concrete possess very good compressive strength but have very low tensile strength, that cannot be neglected also limited ductility and little resistance to cracking. Internal microcracking is inherently present in concrete and the poor tensile strength of concrete is due to propagation of these microcracks and that leads to brittle fracture of concrete. In a Composite Fiber Reinforced Concrete (CFRC), two or more different types of fibers are rationally combined and added to the concrete produce a composite material that derives benefits from each of the individual fibers and show evidence of a synergistic response. The foremost aim of the present experimental investigation is to use different fractions of coconut coir and galvanized steel fibers to produce HFRC and thus to evaluate its performance under compression and flexure strength. Samples were prepared with 10 % replacement of ordinary Portland cement with fly ash and various proportions of these two fibers. The amount of fiber is kept upto 3% by the weight of cement. Six samples are prepared with the ratio of S0C0, S3C0, S2C1, S1.5C1.5, S1C2, & S0C3. The strength of each specimen is investigated to determine the optimum result of sample.