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Title |
Prediction of Carbonation Progress Using Diffusion Coefficient of CO2 in the Atmosphere
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Keywords |
중성화진행 예측 ; 수학모델 ; CO2 확산계수 ; 수산화칼슘 ; 일반 대기환경 Prediction of carbonation progress ; Mathematical model ; Diffusion of CO2 ; Calcium hydroxide ; Atmosphere |
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Abstract |
The rate of carbonation is usually low in the natural environment due to the low CO2 concentration in the atmosphere. Therefore, investigation of carbonation is usually conducted under accelerated testing conditions so as to speed up the process. This study is to predict carbonation progress by mathematical model, based on the diffusions of CO2 and its reaction with Ca(OH)2 in carbonation progressing region, in the atmosphere. To predict of carbonation progress in the atmosphere, we adopted a diffusion coefficient of CO2 that agreed well the experimental value obtained by the accelerated carbonation test. Consequently the model can predict the rate of carbonation of concrete exposed in the atmosphere regardless of finishing materials.
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