| Title |
An Experimental Study on High Flow and High Strength Concrete for Concrete Filled Steel Tube |
| Authors |
Kang Yong-Hak ; Jung Keun-Ho ; Kim Jin-Ho ; Jung Sang-Jin ; Choi Mun-Sik |
| Keywords |
Concrete Filled steel Tube(CFT) ; High Flow and High Strength Concrete ; Condition of Cold and Hot Weather |
| Abstract |
CFT(Concrete Filled steel Tube) is a structure of circular or squared of steel column filled with concrete. The steel tube holds the concrete inside and that makes this structure to perform superior features on stiffness, proof stress, transformation, fire resistance and also on construction itself. In this study, research has been done on the basic property of matter such as fluidity, resistance on segregation, compressive strength, setting icons of the concrete filled in the steel tube under conditions of cold and hot weather. This was compared to the data started in the index of planning and construction of steel tube structure, and mock up test has been done under air curing and adiabatic curing condition. In this study, hydration heat variations while the concrete hardening, core samples were extracted to analysis compressive strength and unit weight. With the results from the tests, it is possible to conclude that adiabatic cured mock up show better proof stress condition under cold weather condition, and air cured mock up show better proof stress condition under hot weather condition. In order to have a satisfactory quality control, special curing management according to the weather conditions is required. Especially when using the method of tremie, special care is needed on the decreasing proof stress of the concrete between two diaphragms. |