Abstract
The control of thermal cracking due to the heat of hydration of cement is important for gravity dams to secure the required functions such as watertightness, durability and the safety. In this study, temperature, strain and stress of placed concrete were measured in the field by Roller compacted dam-concrete construction method, and then the results of measurement and analysis of thermal stress using 2-D Finite Element Method were discussed. The results are summarized as follows.
(1) There were differences of 4-5°C in K (the ultimate adiabatic temperature rise) and 0.2-0.4 in α(he constant on rate of temperature rise) between tested and calculated constant.
(2) The compressive strength ratio of standard cured specimen to core sample was approximately 1 to 0.75.
(3) In setting the initial value, the value passed one day after placement was more appropriate than one soon after placement.
