Use of Quarry Wastes for Block Making

Stone quarrying is undertaken in various places in Karnataka. The stones which are quarried thus are used for various construction activities. During the quarrying process, rubbles of varying sizes and stone dust are generated. These are rejected. This reject percentage is of the order of 25% of the quarried quantity. An analysis of the reject shows that 50% consists of rubbles greater that 1/2" in size, 25% consists of gravel less than 1/2" in size and the dust forms the remaining 25%.

A preliminary analysis of the quarry waste showed the possibility of using them for making cement concrete blocks. This would result in low cost blocks with expected savings of upto 30%. To establish the feasibility, a project on use of quarry waste for block making was initiated.