Effect of Replacement of Coarse Aggregate with Steel Fibers in Concrete

Strength and ductility are the two important factors to be considered in the design of structures subjected to seismic and other dynamic forces. Hence many attempts have been made in the recent past to develop new materials which exhibit higher1 strength and ductility than conventional concrete, so that they could be used in the case of structures subjected to seismic loading, impact or blast loading, cyclic loading etc. It has been understood from the literature that many of the engineering properties such as tensile strength, compressive strength, flexural strength, fracture toughness, energy absorption capacity, strain at peak load etc. of the conventional concrete could be improved by the addition of steel fibers. This study aimed at analyzing the variation in strength of Steel Fiber (used in place of coarse aggregate) reinforced concrete at varying fiber contents and to compare it with that of conventional concrete. The various strength aspects analyzed are the flexural, compressive and tensile strength of the steel fiber reinforced concrete at varying percentages (5 %, 10 % by the weight of cement) of fiber.