Estimation of ultimate modulus of elasticity and Poisson ratio of normal concrete

The relationship between compressive strength of concrete and modulus of elasticity, and between compressive strength of concrete and Poisson ratio was investigated in this study by using the cement hydration equation. The hydration criteria of modulus of elasticity and Poisson ratio of concrete are established hydration criteria and for this reason the cement hydration equation can be used for calculating their accurate values up to the final hydration. Because of the applicability of cement hydration equation to the hydration criteria of modulus of elasticity, Poisson ratio and compressive strength of mortar and concrete, there is a linear relationship between any two of them according to the results of previous study. If examined mortar and concrete were prepared using the same cement. Hence, the "method of two points proportionality" can be used to estimate ultimate modulus of elasticity and Poisson ratio using only two measured values of these properties at ages less than or equal to 28 days (e.g. at 7 and 28 days) and the hydration criterion of mortar's compressive strength. (C) 2003 Elsevier Ltd. All rights reserved.