モルタルを用いた場合の気体拡散性状への炭酸化の影響

概要

論文の詳細を見る
The diffusivity of CO_2 in the gas phase of concrete pores is an important factor in the prediction of carbonation progress of concrete. In this study, the distribution of gas diffusivity from already carbonated surface zone to non-carbonated center zone in specimens, which are accelerated carbonation (in a controlled at 20℃, 60% R.H. and 5% CO_2) with several mix proportions were examined. Quantity open porosity, Ca(OH)_2 and CaCO_3 in specimens were also determined. As a result of this experiment, the diffusion coefficients in specimen from full carbonated surface zone to partially carbonated zone which is reacting with cement hydration by diffused CO_2 were not constant. It is indicated that the prediction of carbonation progress of concrete take account of this result.
社団法人日本建築学会の論文
2009-02-28