Study On Compressive Strength Of Concrete Using Recyceled Concrete As Partial Replacement Of Coarse Aggregate

Abstract

Concrete is a major construction material used in the construction. It is a composite material containing cement, fine aggregate, coarse aggregate and water. Coarse aggregate is required in large quantities for manufacturing of concrete. Generally natural stone chips/brick chips is used as a coarse aggregate. Concrete waste is a solid waste and discarding this waste is a serious problem and requires large space for its disposal and a few percent of it is recycled or reused. This waste can be used instead of natural aggregates in fresh concrete, thus reducing the space for landfill deposits and minimizing environmental pollution. In the recent years, utilization of recycled materials in concrete has gained considerable attention as it means to enhance sustainability and reduce the environmental impact of construction practices. This study focuses on investigating the compressive strength behavior and sustainability analysis of recycled aggregates is partially or completely replaced. The utilization recycled coarse aggregates sourced from various waste materials, including pile head broken and demolished concrete. For this study first control specimens were laid for M15 grade concrete. The coarse aggregate proportion from the mix design was replaced partially in percentages of 0%, 25%, 50%, 75% and 100% by coarse aggregates as pile head broken and demolished concrete on the compressive strength and sustainability of concrete. The compressive strengths of concrete specimens for respective mix proportions were tested at 7, 21 and 28 days of water curing. The behavior of concrete by partial replacement of coarse aggregate as pile head broken and demolished concrete has been studied. The compressive strength of the concrete significantly changed with increasing percentage of replacement in concrete.