A STUDY ON STRENGTH OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH FLY ASH IN ADDITION WITH STEEL FIBER AND COCONUT FIBER

This paper shows the results of a study undertaken to enhance the property of Fly Ash concrete with steel and coconut fiber. The aim of this experiment is to study the behavior of Fly Ash content with Steel Fibers and Coconut Fibers on the properties of concrete. In this investigation the M-20 Grade of concrete with water-cement ratio of 0.45 having a mix proportion of 1:1.5394:2.6910 to determine the compressive strength, split tensile strength and flexural strength. In this study the cement is been replaced with three percentages of Fly Ash by weight 10%, 20% and 30%. Three percentages of Steel Fibers and Coconut Fibers 0%, 1% and 2% were used having a length of 50mm. The results which are obtained are compared with the control specimen. The optimum dosage of adding Fly Ash and Steel Fibers is obtained to be 20% and 2% and the optimum dosage of adding Fly Ash and Coconut Fibers is obtained to be 20% and 1%. A steel fiber gives better results as compared to that of coconut fibers. Tests were conducted on beams with the optimum dosage obtained and are compared with the Identical Reinforced Concrete Beam