Abstract
This paper deals with predictions of drying shrinkage strain of concrete from short-term tests. Two kinds of prediction methods are presented in this study; the simplified method and the extrapolation method proposed by R.P.Ojdrovic and authors, respectively. The ultimate shrinkage of concrete can be predicted with one-point data in the short-term tests by the former method and with the extrapolation of continuous data by the latter one. The effectiveness of these methods was verified with drying shrinkage data accumulated in Japan. The test results showed that both methods, which use the shrinkage data up to 21 days, successfully evaluated the long-term shrinkage strains of concretes. Furthermore, the extrapolation method had higher prediction accuracy than the simplified method especially in the case of the gradual development of shrinkage strains.
