Effect of GGBFS on age dependent static modulus of elasticity of concrete

This paper presents the results of experimental investigations into the time-dependent static elastic modulus of concrete containing GGBFS. The static modulus of elasticity was determined at the ages of 3, 7, 28, 56, 90, 150 and 180 days for twelve concrete mixes using the cylindrical specimens of plain and GGBFS concrete. The amount of cement replacement by GGBFS was varied from 20% to 60%. The static modulus of elasticity of concrete containing GGBFS has been found to be lower than the plain concrete for all replacements of cement at all ages and for all the mixes. The experimental results of time dependent static modulus of elasticity of concrete were compared with available models. A new model for time-dependent static modulus of elasticity of concrete containing GGBFS has been proposed.