空隙構造と化学平衡を考慮したコンクリートの炭酸化反応モデル

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  • Modeling of the carbonation reaction based on pore-structures and chemical equilibrium in pore-water

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In the past, we presented a model of the carbonation reaction of concrete. For that, the chemical equilibrium in the pore-water was measured by its pH. This time, the pore structure was modeled on the mix proportion, the methods of handling and environmental conditions. In this paper, the results of the carbonation analyses are compared, using this model and the measurements of neutralization in existing reinforced concrete structures (in service for 19 to 29 years). Thus, regarding existing reinforced concrete structures, the comparison shows that this analytical model is useful for (1) predicting the progress of neutralization and (2) being adapted for performance certification and service life estimation.

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