Recycle Concrete Aggregate has also been described as “the most revolutionary development in concrete construction for several decades”. It has proved to be beneficial from the point of economic, environmental benefits and Preservation of non-renewable recourses this thesis presents a study conducted on mechanical and durability properties of recycled aggregates concrete. The investigation covered concrete mixes at the water-cementitious material with a ratio of 0.4. Ordinary Portland cement of 43-grade was used in this study. The percentage of recycled aggregates that partially replaced natural aggregates by weight were 0%, 15%,30%, 45%, 60% and 75%. Concrete cubes and cylinders were cast and tested in laboratories. The optimum proportion of replacement was found by conducting tests on mechanical properties like Compressive strength test and Split tensile strength test. To assess the corrosion and durability characteristics of recycled concrete aggregates Acid and alkalinity resistance test were performed. The results show that the optimum replacement of recycled aggregates with natural aggregates was 45%. Up to 45% replacement, it is possible to gain the same strength as conventional concrete. Beyond 45% replacement the strength results following a decreasing trend.