HEAT OF HYDRATION ANALYSIS IN CONCRETE STRUCTURES FOR TECHNICAL FLOOR

Hydration heat is one of the most important factors because it is used as source of heat in concrete structures. Development of compressive strength of concrete for technical floor may be delayed due to using large amount of fly ash to control the heat of hydration. However, long-term development of compressive strength of concrete is expected after 28 days due to the pozzolanic reaction of cement (binder) hydrates. Thus, we suggest the extension of specified strength control age from 28 days to 90 days. Based on the results of finite element analysis of hydration heat for technical floor, we suggest curing methods and periods as follows in order to restrict thermal cracks. This paper presents the results of mix design of concrete grade 50MPa and finite element analysis of heat of hydration on the technical floor. The concrete mix proportion, considering member size and work condition, for technical floor of grade 50MPa is designed.