STUDY ON RESIDUAL COMPRESSIVE STRENGTH AND MODULUS OF ELASTICITY OF STANDARD CONCRETE IN STRESSED STATE EXPOSED TO ELEVATED TEMPERATURES

Abstract

The present study aims to investigate the residual compressive strength and residual modulus of elasticity of standard concrete, when it is simultaneously sustained with load and temperature. The grade of cement for the study is Portland Pozzalana cement and concrete is M25 cured for a period of 28 days. The temperatures under study are 100, 200, 300, 400, 500, 600, 700 and 800 oC sustained for half an hour duration. The stress levels are 0.2 fck, 0.5 fck and unstressed condition. Experiments resulted residual compressive strength and residual modulus of elasticity. Results indicated that at 0.2 fck stress level, residual compressive strength and residual modulus of elasticity slightly improved in comparison with unstressed concrete specimen. But at 0.5 fck stress level, residual compressive strength decreased at high temperatures and residual modulus of elasticity improved when compared to unstressed specimen.