Development of Stress Block and Design Parameters for Recycled Aggregate Concrete Members

The objective of present investigation is to develop stress – block parameters for the design of reinforced recycled aggregate concrete members. To arrive at the objectives, acomprehensive experimental programme was undertaken. The influence of replacementratio, (Rr) the ratio of recycled coarse aggregate to total coarse aggregate (Rr = RCA/TCA) on properties of recycled aggregate concrete was studied. The scope of the investigation programme is defined to generate stress strain test data of concrete, viz; M15, M20, M25, M30, and M35 and five replacement ratios, viz; 0, 0.5, 0.75, 0.85, and 1.0 were considered.A total of 150 cylinder specimens’ and 48 RC beam specimens were cast for the stressstrain characteristics and flexural design of hardened concrete and design parameters are developed for recycled aggregate concrete.