Abstract
For the control of thermal cracking of concrete gravity dams in the design and construction stages, the effect of autogenous shrinkage of concrete on thermal cracking has been considered to be negligible from such that it is lean mix concrete. On the other hand, the effects of cement type and mix proportion on autogenous shrinkage of dam concrete have not been made clear. In this study, autogenous shrinkage strain of dam concrete using full-sized aggregate was experimentally investigated. Autogenous shrinkage characteristics of dam concrete with several types of cement, which have generally been used in Japan, was also investigated. In addition, the design values of autogenous shrinkage strain to be used for verification of thermal cracking in the construction stage of concrete gravity dams were proposed.
