The concrete is a composite material made up of cement, aggregate, and water, and accumulated latent heat, called hydration heat, can be occurred during the setting and hardening procedure.
Recently, Applying of mass concrete of large section has been being frequently with that concrete structures have become high-rise, bigger, longer. In the case of mass concrete, the temperature difference is occurred between inner concrete and surface of concrete due to the reason that the temperature in concrete increase with hydration heat by hydration reaction of cement and water but the temperature of concrete surface exposed to air decrease.
These temperature difference can cause thermal stress in the concrete structure and, in some cases, cracks can occur. Therefore, to maintain the proper quality of mass concrete, it needs to the proper countermeasure to control concrete crack.
In this study, the hydration heat and crack index were reviewed according to the binder and curing type using finite element analysis program and the suitable method that for field condition was selected from the analysis. And, the concrete hydration heat control effect was confirmed by applying the hydration control method to real construction field.

The scope and the organization of this study are as follows.

Chapter 1 presents the introduction of this study, background, aim and scope. And the definition of mass concrete and problem of temperature crack also are described.
Chapter 2 describes literature consideration on hydration heat of mass concrete and countermeasure of temperature crack control. And, mechanism of temperature crack by hydration heat and the present condition of preventing method for crack also are described.
Chapter 3 presents the results of hydration heat and crack index according to the binder and curing type using finite element analysis program. The cement types are set as 3 types (ordinary portland cement, moderateheat portland cement, blast furnace slag cement) and the 2 types(air, bubble sheet) curing condition are set.
Chapter 4 confirms the concrete hydration heat control effect of selected method from the chapter 3, by applying the hydration control method to the real construction field.
Chapter 5 presents the conclusion of this study which summarizes the result of concrete hydration heat analysis and applying the hydration control method to the real construction field.