AE法を適用したコンクリートの劣化度評価に関する実験的研究

Abstract

In this study, a quantitative analysis of Acousitc Emission (AE) data is examined to evaluate the deterioration of concrete structers by uniaxial compressive loadings of core samples. The stochastic theory was introduced into AE activity under uniaxial compressive loading. Applied equation is as follows : N=C・V^a・exp(b・V)……(1) in which, V is relative stress revel (%), N is accumulative AE event number, a, b and C are constants. Following results were obtained in this study : 1) The value of parameter "a" related to the rate of concrete fractrue is closely related with AE behavior under uniaxial compressive loading. In the case of high AE activity at low stress level, the value of "a" becomes positive, while "a" is negative for low AE activity. 2) In the case of specimen cured in air condition, the deterioration of concrete can be estimated by the value of "a".