Abstract—Construction waste has been dramatically increased in the last decade, social and environmental concerns on the recycling have consequently been increased. Recent technology has greatly improved the recycling process for waste concrete. This study presents comparison of properties of natural and recycled aggregates and also the effect of mineral admixture (Metakaolin) on behavior of Recycled Aggregate Concrete (RAC). This study presents the experimental results of recycled aggregate concrete (RAC) prepared with different amount of Recycled Coarse Aggregate (RCA). Six mixes of concrete with 0%, 20%, 40%, 60%, 80%, 100% replacement of natural aggregate with recycled aggregate (RCA) were cast respectively with target compressive strength 25 MPa. In addition to this partial replacement to the weight of cement is done with Metakaolin (20%) for all mixes. The compressive strength using cube specimen, flexural strength using beams specimen, split tensile strength using cylinder specimens were determined at the age of 28 days. The result show that there is minor effect on strength with 20% to 40% recycled aggregates in concrete and later the compressive strength, flexural strength and split tensile strength of the concrete goes on reducing as the recycled aggregate content increases. The study focuses on the possibility of the use of recycled aggregate as a structural material

Index Terms—C & D waste, Metakaolin, Recycled Aggregates, Recycled aggregate concrete

Cite: Rahul M. Jadhav, Pradip D. Jadhao, and Shantanu G. Pande, "A Study on Behavior of Metakaolin Base Recycled Aggregate Concrete," International Journal of Structural and Civil Engineering Research, Vol. 4, No. 1, pp.50-62, February 2015.