Comparative Studies on Strength of Concrete by Partial Replacement of Cement with Marble Dust and Coconut Fibre

Abstract

The cost of building project primarily on the quantity of concrete used during its construction. Cement being the only component manufactured in factories is costly and adds to the cost of a building project. Research work is going on throughout the globe for partial replacement of cement with suitable agriculture waste product such as rice husk ash , fly ash emanating from thermal power plants with the burning of coal, marble powder or coconut coir fiber without hampering the workability as well as strength of concrete. A large amount of coconut fibers is available in coastal region and marble powder exists in Rajasthan .The Feasibility studies on effect of using an admixture of coconut fibers and marble powder on strength of M30 concrete have been conducted . All the instructions, parameters, formulas have been followed according to the bureau of Indian standard. To conduct the test , aggregate consisting of coarse aggregate 20mm and fine sand, 10mm aggregate, marble dust powder, coconut fiber and fresh water have been used. Mix sample of M30 in different variations of ingredients as below have been examined. Four trail mix by varying the percentage of OPC 43 grade of cement, coconut fiber and marble dust powder were prepared and examine for their average compressive strength by the standardized method. It was concluded that M30 mix prepared by 94% of cement with 4% replacement by marble dust powder and adding 2% coconut fiber gives compressive strength of 38.300N/mm2.