Effect of Steel Fiber on Structural Characteristics of High-Strength Concrete

High-strength steel fiber-reinforced concrete (HSSFRC) is used as a structural material and has immense importance in today's scenario. Flexural behavior of HSSFRC with a characteristic compressive strength of 60 MPa using hooked-end fiber is presented in this paper. To study the structural behavior, a total of 20 beams of size 150 mm × 250 mm × 3000 mm with various percentages of steel fiber were cast and tested under static and cyclic loading. The results revealed that use of steel fibers enhanced the properties such as ductility, energy absorption capacity and stiffness degradation of concrete. In order to predict the number of cycles to failure, parameters such as failure deflection, cyclic ductility and cumulative energy absorption capacity of the specimens were considered under cyclic loading. It was assessed that the mixture with 1% steel fiber yielded better values in terms of strength criteria and modulus of elasticity at all the ages of concrete. Ultimate load carrying capacity of HSSFRC was found to be higher than the control concrete.