To Study and Optimization of Strength of the RC & SFRC

The Steel fibers have widely been used in the past to reinforce brittle materials in many nonstructural applications such as concrete, tunneling lining, etc. On the basis of numerous earlier studies, ACI 318-11 [2011] has recently accepted the steel fiber as a minimum shear reinforcement replacement with minimum 0.76% volume fraction for both reinforced concrete and fiber reinforced concrete members. However, not much previous research has talked about the strength behavior of fiber reinforced concrete (FRC). As the ACI 318-11 for tension-controlled sections, net the tensile strains in the outermost layer of the steel, �t, should be greater than or equal to 0.006. In this project, six large scale reinforced concrete beams with or without the steel fiber along with some material test were tested. Our experimental investigations indicated that even with inclusion of small percentage volume of fraction of the steel fiber (Vf =0.76%) could not only increase the ductility and shear strength of the SFRC beam. but also change the failure pattern by increasing usable strain in the concrete and steel. Any standard material test results have to ensure the FRC. . Various tests were carried out in order to assess peak and residual strength, stiffness, strain hardening and softening, toughness and the other post crack properties. It could be used to optimization of the peak strength, residual strength, toughness stiffness and different SFRC mixtures with and without steel fiber.