Waste Marble as Coarse aggregate in Concrete

Today we are faced with an important consumption and a growing need for aggregates because of the growth in industrial production, this situation has led to a fast decrease of available resources. On the other hand, a high volume of marble production has generated a considerable amount of waste materials; almost 70% of this mineral gets wasted in the mining, processing and polishing stages which have a serious impact on the environment. The processing waste is dumped and threatening the aquifer. The main purpose of this study is to demonstrate the possibility of using marble wastes as a substitute rather than natural aggregates in concrete production. This paper presents the study methodology, the characterization of waste marble aggregates and various practical formulations of concrete. This experimental investigation was carried out on two grades of concrete M20 This experimental investigation was carried out on the grades of concrete M20 substituting the coarse aggregate with waste marble chips The collected material was crushed by hammer crusher followed by jaw crusher followed by final screening. The final 20mm passing and 10 mm retaining material obtained were brought into grading zone confirming to IS 383-1970.Control mixes viz. M20 was designed as per IS10262-2009 for virgin aggregates. Cubes of sizes 150x150x150 mm. The samples were kept under water for the ages 3, 7 and 21 days. The Green concrete obtained was investigated for its suitability for structural concrete on the basis of different mechanical properties (compressive strength), workability (Slump value), The concrete formulations were produced with a constant water/cement ratio.