A Study on Minimizing for Hydration Heat Cracks of a Subway Concrete Box Structure

콘크리트 BOX 구조물의 수화열에 의한 온도균열제어 대책

The bigger of concrete structures by a construct technique improvement, and the increase of the cement quantity which is caused by with use of the high-strength concrete for the load-carrying-capacity and a durability cause temperature cracks by a heat of hydration. The temperature crack due to the heat of hydration classified a nonstructural crack. but it has a bad effect on durability of concrete structures. especially, in case of a subway concrete box structure, when a water-proof facilities is beaked on an outer-wall, the water leakage occurs through a penetration crack generated from a wall of the concrete structure too. This paper, for the subway concrete box structure, which is located in chloride attack region, the use of blended cement, the temperature of air and concrete, was considered and analysed by a three dimensional finite element method.