Experimental Study on Lightweight Concrete with Copper Slag and Pumice Stone, Leca as a Partial Replacement of Aggregates

The project presents the usage of copper slag, pumice stone and leca (light expanded clay aggregate) for partial replacement of fine aggregate and coarse aggregate. The experimental procedure is conducted for the replacing percentages of 5, 15 and 25%. For this above-mentioned replacement percentage, M20 grade concrete is used with a water–cement ratio of 0.48. For 5% replacement of pumice, the amount of copper slag replaced is 5% with fine aggregate and the amount of pumice replaced is 5% with coarse aggregate. For 5% replacement of leca, the amount of copper slag replaced is 5% with fine aggregate and the amount of leca replaced is 5% with coarse aggregate. Similarly, 15 and 25% replacement of fine aggregate and coarse aggregate is done, respectively. For this purpose, seven sets were prepared to study the compressive strength, split tensile strength and flexural strength. Each set comprises of three cubes, three cylinders and three prisms. The compressive strength test, split tensile strength test, flexure strength test have been done. A comparison study has been done between leca and pumice to identify the suitable alternate for ordinary concrete. The main objective of this project is to know the strength of partially replaced concrete.