A lot of old structures and pavements (bituminous and concrete) are collapsed or replaced every year. The demolition and structure processes naturally introduce the problem of recycling materials. When used appropriately, recycled materials provide good quality, costeffective road construction materials that benefit the environment and lessen the use of raw materials. In most cases, the use of recycled materials offers economic benefits, because recycled materials often cost less than virgin aggregate materials, particularly when used in reclamationcosts, and may also save transportation and disposal-related costs. The social benefits of using recycled materials include saving available natural resources and extending the life of available landfill space. Although much research has been conducted on using recycled materials, especiallyreclaimed asphalt pavement (RAP) bituminous pavement layers, limited research has been reported on the use of RAP in concrete pavements. Most of the studies have investigated the replacement percentage of RAP for natural aggregates. Several researchers conducted experiments on testing the strength parameters of the RAP concrete and have suggested methods to improve the durability properties of the RAP concrete. This review paper is presented to study and consolidate the results and findings of the previous works carried out by various researchers across the globe. The review attempted to refer all possible research materials available online and offline. Conference materials, technical reports, IRC code books, etc were also studied to understand the RAP concrete for future research. The reviews from the literature are presented based on the phases that the RAP material has taken in the construction industry. Firstly “RAP as a waste” was reviewed through the literatures and was identified as a potential waste to be reused in concrete. Secondly the literature papers were grouped and reviewed for the possible forms of replacement of RAP (coarse and fine) for natural aggregates. This phase of feasibility (2000 to 2010) established the demand of RAP as an alternative for natural aggregates. By 2011 RAP -271-material had a great potential of being used as a substitute for the natural aggregates in concrete making. Investigations concluded that the natural coarse aggregates could be replaced by coarse RAP up to 50% in concrete pavements and on the other hand the replacement of fine RAP was still under consideration for in depth study and analysis. So, this phase (2011 to 2015) is portrayed as the phase of replaceability in this paper. Finally, during the phase of enrichment and durability (2016 to 2021) few attempts have been made to enhance the strength properties of RAP concrete by utilizing different supplementary cementitious mineral admixtures such a silica fume, fly ash etc., Through the studies it was observed that very few efforts were taken by the researchers for increasing the strength properties of RAP-concrete and there was a need for more attempts to enhance and enrich the potential usage of RAP in concrete pavements. This review is expected to expose the new dimensions required to be thought of by the academicians and researchers in the effective utilization of RAP for sustainable concrete pavements in India.

concrete pavements, reclaimed asphalt pavement, sustainability