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

Abstract

The concrete structure has been designed on the basis of strength criteria. The compressive strength of concrete is traditionally determined by 28 days cured cylinder test and this strength is used in designing concrete structures. We used recycled aggregate in concrete can be useful for the environment harmful. In this reports the basic materials of recycled coarse aggregate and compares these properties with natural aggregates. Concrete materials like compressive strength, flexure strength, etc. are explained here for mixed of recycled aggregate with new aggregate. Design Code guidelines for the recycled aggregate of concrete in various countries are stated here with their effects on concrete work. Usually recycled aggregate in Bangladesh along with its future need and successful use are discussed here. We performed our work in three ways. Firstly, we made 6 nos concrete cylinders by using fresh aggregate 100%. Secondly 6 nos concrete cylinders by using recycled aggregate 100%. Thirdly, we made 6 nos concrete cylinders by using fresh aggregate 50% and recycled aggregate 50% mixed. For this study, we have made the cylinder of 4” (dia) and 8” (height). The total cylinders for the experiment are 18 nos. The maximum load was found after 28 days for 100% fresh aggregate concrete.