Abstract
Drying shrinkage strain increases as time goes on, the development of drying shrinkage continues for several years. In the process of drying shrinkage strain increasing, it is important that increasing ratio of drying shrinkage strain is examined in order to predict drying shrinkage strain at the long-term age. In this paper, the increasing ratio of drying shrinkage strain is called as the aging characteristic of that.
Authors found that the aging characteristic of drying shrinkage strain is influenced by the fundamental characters of concrete, such as unit weight of water, water cement ratio, aggregate absorption, and the aging characteristic of drying shrinkage strain was expressed by the above concrete characters. Moreover, the predictive method considering the aging characteristic of drying shrinkage strain was developed. The proposed method enables to predict drying shrinkage strain at the age of six months by measuring the drying shrinkage strain at the short-term age, such as one month or two months or three months.
It is found that the predictive accuracy of the proposed method is high. When the differences between measurement values at the age of six months and predictive values at the age of six months were calculated, the average difference was twenty micros.
