2005 Volume 2005 Issue 802 Pages 802_33-802_48
When the effectiveness of expansive concrete is discussed in analytical evaluation, the effective Young's modulus is one of the most important factors for the reliability of analysis. Although there have been conducted some experimental investigation on the Young's modulus of concrete at an early age, the general solution has not yet yielded. This paper discusses the effective Young's modulus of expansive concrete with use of high early strength cement at an early age based on the experimental results obtained from the two test series, one is the series of stress release using the standard uni-axially restrained test specimen and the other is the series of specially designed uni-axially restrained test specimen where a restraining bar with very little thermal sensitivity is used to compensate the thermal expansion of the bar. Moreover, the influence of creep at an early age on Young's modulus of concrete is discussed based on the thermal stress analysis by finite element method.
