양생조건에 따른 Mass Concrete의 수화열 특성

Abstract

In mass concrete, thermal stresses are developed in two ways: from the dissipation of the heat of hydration and from periodic cycles of ambient temperature. At mat foundation, the temperatures of inner and external part is different in general. The temperature of inner part is mainly affected by hydration of cement and external part is by ambient temperature. Thermal gradient is one of the main reasons of thermal crack but can be controlled by surface curing condition. The purpose of this study is to observe the thermal gradient according to curing condition. Temperatures at mat foundations with different surface curing conditions are examined and FEM thermal analysis is performed. In result, as the adiabatic capacity of surface curing material is better, the thermal gradient of mass concrete is steeper.