Abstract
This paper presents the experimental results regarding compressive strength, flexural strength, Young's modulus and Poisson's ratio of expansive concrete subjected to uniaxial restraint. The uniaxial restraint with which a compressive strength test is carried out, does hardly affect the compressive strength and Young's modulus of expansive concrete, but the Poisson's ratio with the restraint is larger than that without one.Young's moduli obtained by releasing the uniaxial restraint are almost the same as ones obtained by loading. The expansive concrete shows reduction in Young's modulus due to expansion even though the compressive strength is the same as one of ordinary concrete. When the restraining steel ratio is high, reduction of both strength and Young's modulus is alleviated. However, there is a limit of the restraining steel ratio in case of restrained only in a uniaxial direction. The change with increased age in mechanical behavior of expansive concrete is larger than that of ordinary concrete not containing expansive admixture.
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