PREDICTION EQUATION OF SHRINKAGE OF CONCRETE BASED ON COMPOSITE MODEL : Evolution to three-phase model and consideration of external factors

Abstract

In this study, in order to obtain the prediction equation for expressing the drying shrinkage of concrete with high accuracy, the authors' earlier prediction equation based on composite model is developed from two-phase model into three-phase model, and is extended to the form considering the effects of member size and shape, relative humidity of environment. In addition, for the case of no data concerned with aggregate property, which are input data for the authors' equation, another prediction equation is shown. Furthermore, the proposed prediction equation is discussed in comparison with past data of drying shrinkage.