Estimation of Modulus of Elasticity In High-Performance Concrete Mix at Earlier and Later Ages

Abstract

An investigation was performed to study the estimation of modulus of elasticity at early and later ages, as a function of compressive strength and by the maturity approach. The study includes extensive laboratory work, where compressive strength and modulus of elasticity were measured at different ages for a high performance concrete mixture made with two different types of coarse aggregate, and cured at various curing temperatures. Comparison with provisions to estimate the modulus of elasticity given by ACI 318 and the CEB model code are presented, together with the application of the maturity approach to model the development of the modulus of elasticity. It is concluded that the compressive strength-modulus of elasticity relationships in the international codes may be used to estimate the elastic modulus at later ages if correction factors to account for the type of coarse aggregate are used. These relationships, however, were not able to estimate reliable results at earlier ages. The maturity approach was seen to better estimate the modulus of elasticity at early ages.