A Study On Effect Of Steel Fiber On Concrete Strength

Abstract

Concrete is observed to be very weak in tension and exhibits somehow brittle type of failure. This problem is often reduced by the addition of different types of fibers in concrete mix. This study considers adding a certain percentage of steel waste fiber in concrete mix and examines its effect on concrete compressive strength, concrete flexural strength, concrete split tensile strength, and its effect on workability of fresh concrete. The experimental procedure contains determination of concrete and steel waste fiber material properties. The percentages of the steel fiber(SWF) used in the concrete mix are 0.5%, 1%, and 2% of the total volume of concrete. The tests are conducted at the age of 7 𝑡ℎ and 28𝑡ℎ days of concrete to determine the effects of steel fiber(SWF) at early and hardened stage of concrete. From the result of laboratory tests the effects of steel fiber(SWF) on concrete stress strain, crack pattern, load versus deflection and workability is investigated. From the results, it is observed that an addition of steel fiber(SWF) in concrete mix has a significant effect on split tensile strength and flexural strength. However, it has a little effect on concrete compressive strength. The effects of steel fiber(SWF) beyond the peak load have also been examined and it is observed that the steel fiber increased the ductility of the concrete.