1991 Volume 2 Issue 1 Pages 125-134
Recently, some mathematical models for the prediction on progress of carbonation of concrete were reported. These models were taking account of CO2 diffusion and chemical reaction of Ca (OH) 2 and CO2. These models were based on the assumption that CO2 diffused in the carbonation zone and reacted with Ca (OH) 2 at the boundary face of carbonation zone and uncarbonation zone. In these models did not coexist. According to previous studies, however, it was know that Ca (OH) 2 and CaCO3 do coexist in carbonation progress zone. In this study, a mathematical model to predict the progress of carbonation of concrete has been established based on the reducing concentration of Ca (OH) 2 in the carbonation progress zone where Ca (OH) 2 reacts with CO2 and Ca (OH) 2 and CaCO3 coexist.
