Authors : Salahaldein Alsadey, Abdelnaser Omran and Issa Amaish
Abstract: Waste from construction and demolition are one of the main types of wastes produced worldwide. The aim of this study is to lessen the environmental problems produced by the dumping of waste from construction and demolition. This study presents a comparative analysis of the findings of the experiments conducted on the properties of fresh and hardened concrete with different replacement ratios of normal with recycled coarse aggregate. Recycled aggregate was produced by crushing the waste concrete from buildings. Two types of concrete mixtures were tested namely concrete made fully using normal aggregate as a control concrete and another type of concrete made using recycled coarse aggregate (25, 50 and 75% coarse recycled aggregate replacement were used). Twelve specimens were utilized for the testing compressive strength of the basic properties of hardened concrete. Flexural test of the concrete beams made from the concrete types were also tested. Irrespective of the replacement ratio used, recycled aggregate concrete had a satisfactory performance that did not significantly differ from the performance of control concrete in this experimental study. Nevertheless, it is vital to utilize quality recycled concrete coarse aggregate and to adhere to the specific rules for designing and producing this type of new concrete.
Salahaldein Alsadey, Abdelnaser Omran and Issa Amaish, 2021. The Effect of Recycled Aggregate Quality on Concrete Properties. Journal of Engineering and Applied Sciences, 16: 42-46.