Abstract
This paper deals with estimation of the strength in high strength concrete structures subjected to high temperature history caused by hydration heat of cement. The compressive strengths of standard cured specimens, on site seal cured specimens, and adiabatically cured specimens using the newly developed simple method were compared with the strength in structures. The temperature history of the adiabatically cured specimens were also compared with the temperature history of structure. It was found that the temperature history of the adiabatically cured specimens were similar to that of the structure at early age, Is concluded that the strength in high strength concrete structure can be estimated using the simple adiabatic curing.