Natural aggregate is used in larger quantities from natural resources it makes the big problem in future. For less use of natural aggregate, the availability of demolished concrete for use as the recycled concrete aggregate (RCA) is increasing. Using this waste concrete as RCA conserves natural aggregate, reduces the quantities of landfills, decreases energy consumption and can provide in less cost. However, there are still many questions on the beneficial use of RCA in concrete pavements.The aim of this research is to find the possibility of the structural usage of recycled aggregate concrete is mixed with natural aggregates, based on better understanding of the behavior of recycled aggregate in concrete structures experimenting fresh and hardened concrete, mixtures containing recycled aggregates. The literature review provides an overview of sustainability, the material properties of RCA both as an aggregate and in concrete, concrete mixture and designs with RCA, the performance of used RCA pavements, and the implementation of RCA highlighting some examples where RCA has been used successfully. Use of recycled aggregate (RA) in concrete is very useful for environmental protection and economic terms. Recycled aggregates are the construction materials for the future. Recycle concrete aggregate is giving little lower strength than natural aggregate concrete. Though, if it is used up to 20% of replacement by weight than it can give almost same strength to that of natural aggregate concrete. Hence it was very important to improve the strength of recycled aggregate concrete for higher recycled aggregate content.Hence silica fume used for strength improvement material.