Abstract
Drying shrinkage of concrete exerts a serious influence toward the long-term reliability such as the durability of the structure. The estimation formula of drying shrinkage of concrete is necessary by using examine this behavior of properties. In this paper, the prediction estimation formula of drying shrinkage strain of concrete is obtained with two-phase composite material model as cement paste and aggregate. The results of the this study are summarized as follows: 1) The elastic modulus of cement paste can be explained as a function of the cement-water ratio and age at drying, as well as drying shrinkage strain. 2) Drying shrinkage of aggregate can be explained as a function of its absorption. 3) Drying shrinkage of concrete can be calculated using five parameters of water-cement ratio, age at drying, the absorption of aggregate, the volume of aggregate and volume-surface ratio of member. The calculated results agreed well with the experimental data.
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