Utilization of recycled concrete aggregate in bituminous mixtures: A comprehensive review

Utilizing Recycled concrete aggregates (RCA) in bituminous mixes contains several environmental and economic benefits however the poor physical properties of RCA in some cases results in inferior mix properties as compared to mixtures comprised of virgin aggregates. Due to these drawbacks, field utilization of RCA in bituminous mixes is very low. This paper presents a detailed review associated with different stages included in the utilization of RCA in bituminous mixes. The paper discusses different stages and treatment methods used to produce RCA. It also talks about RCA's conventional characteristics i.e. physical and chemical and microscopic characteristics and how they affect the performance of RCA incorporated bituminous mix in terms of stability, indirect tensile strength, rutting, fatigue, resilient modulus, moisture damage potential, and low-temperature performance with the help of reviewing available literature. The available approaches for enhancing the RCA's physical properties and the performance of RCA incorporated bituminous mixes are also explored.