Experimental study on recycled coarse aggregate of concrete

Abstract

After water, concrete is the second most consumed substance on the earth, and its extensive use serves as the foundation for the urbanisation of the planet. Additionally, concrete facilitates the growth of metropolitan zones. Approximately 25 billion tonnes of concrete are produced annually on a global scale, according to estimates. The manufacture of concrete requires a growing quantity of aggregate, while the current supply is decreasing. Therefore, it is vital that new aggregate sources be identified. Recycling concrete is growing in importance as it conserves natural resources and reduces the need for disposal by utilising readily available concrete as a source of aggregate for the manufacture of fresh concrete. Due to the fact that recycling concrete conserves natural resources and avoids the need for disposal, this is the case. It is often believed that the use of demolished concrete as a substitute for natural aggregate might lead to numerous issues. This is because all emerging nations are concentrating on the creation of ecologically friendly technology. However, according to a previous study, the use of recycled concrete results in a decrease in the concrete's strength as well as other characteristics. The incorporation of aggregate as one of the basic components in the production of concrete is crucial to the operation. 35 to 40 percent of the entire concrete mixture consists of coarse aggregate. The qualities of the aggregates utilised in the production of concrete also have an effect on the final strength of the concrete. As part of this programme, demolished concrete from a field is collected, reused through a few easy steps to improve its qualities, and then used to produce new concrete. It was discovered that reborn concrete with 100 percent, 75 percent, and 50 percent replacement of aggregate (RCA) at 7 days, 14 days, and 28 days exhibited higher compressive strength than conventional concrete. This was discovered by comparing resurrected concrete to conventional concrete.