Published Paper Details:

Cement is the most expensive constituents of concrete. Over 5% of global CO2 emission is attributed by cement production. The use of scrap tyre rubber in the preparation of concrete has been thought as an alternative disposal of such waste to protect the environment. consequently, it is required to find substitute materials to reduce the cost of concrete. In this work, alternate source for cement as rice husk ash (RHA) and coarse aggregate as waste tyre rubber is tried. In the current experimental analysis, the M20 grade concrete is preferred as the reference concrete specimen. A comparative study is done on properties of concrete when cement and aggregate are partially replaced by rice husk ash and waste tyre rubber. Percentage replacement of cement and coarse aggregate with RHA and tyre rubber are replaced at 0%, 5%, 10% and 15% in a mix of M20 grade of concrete. The compressive strength is found out at 7 and 14 days. The strength is compared with control concrete and the optimum % of replacement of RHA and rubber is found out. The objective of this project is to investigate the use of rubber pieces as coarse aggregate and RHA as cement in the concrete. Concrete is tested with varying percentages of rubber and RHA from 0 to 15% of normal aggregates. Compressive strength of concrete, impact value, abrasion value, slump value is measured and comparative analysis is made. Based on the analysis of results, the conclusions that can be made are: 1.The workability of concrete decreased as the percentage of rubber and RHA increased. 2. Lack of cohesiveness and proper bonding between rubber and cement causes shear slump. 3. Compressive strength of normal concrete is higher compared to rubberized and RHA concrete.4. Replacement of rubber reduces the weight of the concrete. 5 compressive strength decreases as the percentage of replacement increases.