A Study and Comparative Analysis of Mechanical Properties of Concrete after Partial Replacement of Sand with Granite Powder for M30 Grade Brijmohan Sharma M.Tech. Scholar Department of Civil Engineering , Kautilya Institute of Technology and Engineering, Sitapura, Jaipur-302022 Mahendra Saini Assistant Professor Department of Civil Engineering , Kautilya Institute of Technology and Engineering, Sitapur, Jaipur-302022 Sitaram Jat Assistant Professor Department of Civil Engineering, Kautilya Institute of Technology and Engineering, Sitapura, Jaipur-302022 Abstract – With the rising population and booming construction sector, there is an immense burden on environment. Concrete as we know as a composite material made up of cement, sand, aggregates, water and admixtures. It is one of the key components in any construction. So far, valuable research and development has been conducted in the field of concrete technology. The scientists and engineers have replaced cement partially by fly ash and invented PPC cement thereby reducing burden of excessive burden of limestone excavation from mines to an extent. Fly ash being a waste material extracted from thermal power plant chimneys has now become useful component of cement and concrete. Fine aggregate is one of the most essential components of concrete. The most commonly used fine aggregate is natural river sand. Due to the extensive use of concrete, the global consumption of natural river sand is very high. Now as we are progressing with time, need of the hour is to remove burden on rivers from where sand is mined illegally and on a massive scale. The sand mined from rivers leads to drying of rivers, reducing habitat of species and increase problem of migration on account of water scarcity. This problem could be addressed by using waste products from industries and partially replacing them with sand to an extent. This could ease the burden on rivers which are currently main source of sand. Due to excessive cost of transportation from natural sources the river sand is expensive. Also exploitation of the natural sources on a massive scale creates environmental problems. The granite waste is a by-product generated by the granite industry which has accumulated over years. Only small quantity of it has been utilized and the remaining has been dumped in the surrounding areas resulting in environment problem. With the colossal increase in the quantity of waste requiring disposal, coupled with severe scarcity of dumping sites, and sharp increase in the transportation and dumping costs the quality of environment, has got seriously deteriorated preventing sustainable development. Granite powder (GP) gets easily carried away by the air easily as it is a fine material and causes health problems like lung diseases and inhaling problems moreover it causes environmental pollution. The worst effects of air pollution are on the majority of people living in and around the dumping sites. In this study, concrete prepared with granite powder was tested and compared with control mix of M30 grade. The blended mixes i.e. GPC5, GPC10, GPC15, GPC20, GPC25 and GPC30 were prepared in which sand was replaced by GP in different proportions of 5%, 10%, 15%, 20%, 25% and 30% respectively. The basic parameters on which control mix and blended mixes were compared are compressive strength, flexural strength, split tensile strength, water absorption, density and workability. The compressive strength test was done for mixes after 7 and 28 days of curing. The parameters like flexural strength, split tensile strength, water absorption and density were evaluated after 28 days of curing. In this study an attempt has been made to overcome problem of river sand to an extent by partially replacing it with GP and develop a sustainable concrete from the granite scrap. Alternative materials such as granite powder would reduce the demand on river sand and contribute in sustainable development Keywords- Fly Ash, Compressive strength, Workability, Granite scrap, Tensile Strength, Flexural strength. I. INTRODUCTION Mixture of cement, natural sand, coarse aggregate and water is known as Concrete. Concrete is considered to be successful when it is versatile against harsh environment and can withstand unfavourable weather conditions with ease. With the help of innovative chemical admixtures and various supplementary materials SMs the engineers and scientists are further trying to increase its limits. When industrial wastes are used in the concrete to reduce burden of over-consumption of natural resources, save energy and minimize pollution of the environment, the resultant concrete is known as Green concrete. Between the different varieties of solid industrial wastes generated the marble and granite wastes, have the potentiality to be used for concrete. These by-products could be used as a filler (partially replacing sand) material to reduce the total voids content in International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 http://www.ijert.org IJERTV8IS060356 (This work is licensed under a Creative Commons Attribution 4.0 International License.) Published by : www.ijert.org Vol. 8 Issue 06, June-2019 375