Abstract
As reinforced concrete structures have become large, cracking caused by thermal stress is becoming a serious problem. For reducing heat of hydration, Super Low Heat Cement has been developed. This cement has extremely low heat of hydration, that is approximately 55cal/g at age of 28 days, which is about 35 and 20cal/g lower than that of normal portland cement and moderate heat portland cement, respectively.
The strength of the concrete using this cement was found to be about the same as that using normal portland cement. Nevertheless the adiabatic temperature rise of the Super Low Heat Cement concrete was approximately 10°C lower than that of normal portland cement. The same tendency was recognized when used for concrete with segregation resistivity in water, too.
Therefore, it is evident that use of this cement is very effective for reducing the temperature rise of mass concrete members, in the atmosphere or in water.
