Experimental Study on Glass Fibre Reinforced Concrete with Partial Replacement of Cement by Rice Husk Ash and Fine Aggregate by Copper Slag and Quarry Dust

Abstract

Glass Fibre reinforced concrete is a composite material consisting of cement, fine aggregate, coarse aggregates and fibres. Glass fibers are used as reinforcement for concrete. It improves the tensile strength of concrete and resistance to cracking in concrete. It has many advantages such as light weight, fire resistance, good appearance and strength. Rice Husk Ash possess high pozzolanic activities and very suitable as partial replacement of cement in concrete. By using rice husk ash in concrete, it provides many advantages, such as improved strength and durability properties and reduced carbon-dioxide emissions. The function of Fine Aggregate is to assist in producing workability and voids are filled to attain uniformity in mixture. The river beds are most common source of fine aggregate. In order to limit the usage of Fine aggregate the construction projects that use Quarry Dust and copper slag have proven to be cheaper than those that depend wholly on sand. The dust come at cheaper cost and lesser. To reduce the consumption of river sand we are replacing Quarry dust at 15% and copper slag at 15% as a partial replacement of fine aggregate. In this present study the concrete is casted for a design mix of M30 grade with a partial replacement of cement with Rice Husk Ash at varying percentages i.e., 5%, 10%, 15% and Glass FIBREs were added at 0.25% by weight of cement. The experimental test results demonstrate considerable changes in compressive strength, flexural strength, split tensile strength of specimen at 7 and 28 days with addition of alkali resistant glass Fibers. From the test results it was observed that 10% replacement of Rice husk ash, 15% quarry dust,15 % copper slag & 0.25% of glass fibers showed the maximum compressive, tensile & flexural strength when compared to conventional M30 grade concrete.