One of the most serious environmental concerns affecting the scientific community and government organizations around the world is end-of-life tire recycling. An estimated one billion tires reach the end of their usable life each year, with only about half being recycled and the rest ending up in landfills. As a result, in order to solve the deficiency in the utilization rate of end-of-life tires, it is critical to improve existing recycled tire applications and develop new ones. One application that is currently being investigated is the use of scrap tire rubber as a partial replacement for conventional aggregates in concrete applications. Although it has a lot of promise, it has several drawbacks, such as the rubber's intrinsic strength and poor binding performance with the cement matrix, which prevents it from being used as an aggregate in significant numbers. Tire rubber has been utilized to improve the impact and toughness of ordinarily brittle concrete for quite some time. Rubber aggregates' flexibility could be the key to alleviating the problem of fatigue and impact loading failure, which is a concern in ordinary concrete. Even if the mechanical properties of tire rubber concrete are compromised, this can be remedied by correctly treating tire rubber aggregates. To increase their adhesion to cement mortar, tire rubber aggregates could be treated with mechanical, chemical, thermal, or UV-A treatment. This review paper considers the effect of rubber particle size, percentage replacement, and various treatment procedures on different mechanical properties of rubber concrete has been studied over the last one or two decades.