Evaluation of Cracking in Concrete due to Alkali-Aggregate Reaction

Abstract

This study was carried out as a part of the research program to develop a tesing method by using a concrete specimen for determining the occurrence of alkali aggregate reaction.
In order to prevent the cracking damage of concrete structure by alkali-aggregate reaction and to devise a counterplan, it is important that the reactivity of aggregate is evaluated in advance, and the characteristics of expansion and crack occured in concrete using reactive aggregate are precisly understood.
In this study, the several conditions affecting the expansion and crack in concrete, that is, length change with the lapse of time, alkali contents in concrete, storage conditions, and characteristics of crack, were investigated experimentally. Moreover, the degree of cracking damage was evaluated from the correlation between the crack development and the deterioration of concrete.