PREDICTION AND EVALUATION OF THE DEPTH OF CARBONATION OF CONCRETE BY ACCELERATED TEST

Abstract

The effect of initial curing periods in water, the replacement ratio of fly ash and binder content on the depth of carbonation of concrete under accelerated carbonation condition is evaluated to predict the depth of carbonation of concrete under natural exposure condition. The depth of carbonation depends on these factors and it can be predicted by the effective water-binder ratio or compressive strength of concrete cured in water for 28 days. The test results of the accelerated carbonation test are compared with those of the natural exposure test. The depth of carbonation of concrete exposed indoors for 15 years has a good correlation with the calculated values by the equations proposed in this study. The depth of carbonation of concrete under natural indoor condition can be predicted by the accelerated carbonation test.