Comparative Study on Compressive Strength of Demolished Concrete Aggregate and Conventional Concrete Aggregate for Construction Materials

Abstract

Recycling and waste reduction both are extremely important elements in the framework of waste management, because they help to preserve mainly the natural resources and reduce demand for valuable landfill space. Demolition and construction waste quantities posing an adverse effect on the environment. Utilization of such waste as recycled aggregate in concrete can be useful both for environmental protection and economical aspects in the construction industry. In this research, the use of recycled concrete aggregate in the concrete and the effects on its compressive strength by progressively replacing the natural concrete aggregate (NCA) with recycled aggregate was studied. It was the experimental study of recycled concrete aggregate (RCA) when it was compared with the natural concrete aggregate on account of its physical properties. Cubes having dimension 150x150x150mm 3 were casted using recycled aggregate by replacing the natural aggregate by 0%, 25%, 50% and 75% and corresponding results of compressive strengths were recorded. The compressive strengths were recorded by crushing the cube at 7, 14, 21 and 28 days and it was found that performance of concretes with 0% and 25% replacement of natural aggregate by recycled aggregate were quite similar to concrete without replacement but with 50% and 75% replacement, the strength of concrete was decreased.