Abstract
In order to evaluate the effect of autogeneous shrinkage and tensile creep property on stress of concrete under quasi-complete restraint condition as well as cracking behavior, Variable Restraint Testing Machine (VRTM) was developed. Using this machine, cracking potential of variable high-strength concrete in early ages were evaluated. According to those experiments, following results were obtained: (1)Tensile strength of concrete was higher than splitting tensile strength, while concrete under small stress/strength ratio. (2)Tensile strength of concrete under restrained condition was changed according to the amount of tensile creep strain. Larger amount of tensile creep strain reduced the tensile strength.
