A Review Paper on Recycle Aggregate in Concrete

In this rapid urbanization of world, recycle of Construction & Demolition (C&D) materials plays a key role to prevent natural resources. In the last few decades a variation of recycling method for C&D wastes has been established. One of the key components in C&D waste concrete aggregate has been use to replace with natural aggregate (NA) after being treated, which is known as recycle coarse aggregate (RCA). The different properties of RCA and C&D wastes affect the mix design and also affect the fresh properties and harden properties of the resulting concrete, when the replacement of RCA beyond a certain percentage of natural aggregate. Various studies show the recycle aggregate concrete required comparatively lower water-cement ratio as compared to parent concrete to gain particular compressive strength. This paper represents the analysis of the different research paper on the topic of Recycle Aggregate Concrete. Study found that the setting time of recycled aggregate concrete are slightly less as compare to the natural concrete and rate of workability is slightly less in recycled aggregate concrete than for a natural aggregate concrete and recycled aggregate concrete requires more water than fresh concrete to retain the same slump without use of adhesions and the creep of recycled aggregate concrete is comparatively higher then natural concrete.