EXPERIMENTAL STUDY OF CONCRETE CONTAINING MARBLE DUST IN PARTIAL REPLACEMENT OF CEMENT AND FINE AGGREGATE BY WASTE FOUNDARY SAND

In good concrete the ingredients must be of right proportioned, cohesive enough to be transported, placed in such a way that ingredients must not segregated from each other. Moreover the good concrete must be workable and can be compacted. In mixing of fresh concrete and in curing of hardened concrete water is necessary. To modify property of concrete some chemical & mineral admixture are used. Also the emerging trends in engineering divert the interest of researchers towards the usage of waste material in concrete. Many of the waste materials are already in use such as fly ash, rice husk ash, silica fume and blast furnace slag. These materials are termed as supplementary cementitious materials as they are used as a partial replacement of concrete. But researches are still on-going on other waste materials for their use in concrete such as rubber tires, waste glass, egg shell etc. The present work is directed towards developing a better understanding on strengths characteristics of concrete using marble dust powder as a partial replacement of cement and waste foundry sand as a partial replacement of sand. Before further discussion, it shall be better to have a knowledge and clear understanding about the foundry sand and marble waste and their properties and performances. Marble dust powder and foundry sand were used in proportion of 2.5 % and 5% replacement of cement and sand respectively. Optimum results were found at 2.5 % Mable dust and 2.5 % foundry sand combination use