Mechanical properties of concrete containing recycled aggregate from construction waste

Recycling is one of the wonderful ways to manage construction waste in terms of reducing the volume of wastes and decreasing the number of natural resources that are exploited in order to rehabilitate and safeguard our surroundings. Recycling can be done in a number of different ways. Because of this significant problem, certain types of trash from building, such as waste concrete aggregate, can be recycled multiple times and put to use in brand new endeavors. We evaluated the influence that these substances have on the compressive, tensile, and flexural strength of concrete cases as part of this research. In this study, we focused closely on certain types of trash as a substitute for large-sized materials like gravel. The ratio of water to cement in this concrete is 0.56, and the percentage of recycled large aggregates to natural and fresh large aggregate ranges from 0 to 60, with 20 and 30 being the least recycled and 60 being the most recycled. Seven and twenty-eight days of cure were the two separate times that the tests were run for. According to the findings, increasing the replacement rate has an effect on the compressive strength, tensile strength, and flexural strength of the material; however, these reductions in strength are not statistically significant. The low compressive strength can be attributed to the excessive water absorption of recycled materials and the weak adhesion between recycled aggregates, aged mortar, and cement paste. Recycled materials also have poor adherence to one another. The lack of cohesiveness of recycled materials and the crushing of those aggregates during the mixing process are two additional contributors to the increase in concrete fines. The compressive strength decreased by fifty percent as a direct effect of the replacement.