Browse > Article
http://dx.doi.org/10.4334/JKCI.2010.22.2.209

The Prediction Model of Carbonation Process by CO2 Diffusion Using the Air Permeability Coefficient for Concrete  

Kang, Suk-Pyo (Dept. of Architecture and Interior Design, Woosuk University)
Kim, Young-Sun (Dept. of Architectural Engineering, Chungnam National University)
Song, Ha-Won (Dept. of Civil and Environmental Engineering, Yonsei University)
Kim, Gyu-Yong (Dept. of Architectural Engineering, Chungnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.2, 2010 , pp. 209-217 More about this Journal
Abstract
Recently, some mathematical models for the prediction on progress of carbonation of concrete were reported. These models take account for $CO_2$ diffusion and chemical reaction between $Ca(OH)_2$ and $CO_2$. Based on the assumption that $CO_2$ diffuses in the carbonation zone and reacts with $Ca(OH)_2$ at the outer face of carbonation zone and non-carbonation 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 $CO_2$ and $Ca(OH)_2$ and $CaCO_3$ coexist. Also, the prediction model of carbonation progress rate of concrete using the air permeability coefficient regarding to $CO_2$ diffusion is developed. As a result of this study, an expression, the model equation is obtained for the prediction of carbonation based on the time and interaction velocity between $CO_2$ and Ca(OH)$_2$ dependent air permeability coefficient. The prediction by the model satisfied the experimental data of the accelerated carbonation for painted concrete. Consequently, the model can predict the rate of carbonation and the potential service life of concrete structure exposed to atmosphere.
Keywords
carbonation; prediction model; $CO_2$ diffusion; air permeability coefficient; $Ca(OH)_2$;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 黃光律, 野口貴文, 友澤史紀, “フライアッシユを混和したコンクリ一トの中性化進行の豫測,” 日本建築學會構造系論文報告集, 541 , 2001, pp. 9-15.
2 이상현, 박원준, 이한승, 경제운, 변영모, “콘크리트 표면마감재의 탄산화 억제성능 평가를 위한 FEM 해석연구,” 대한건축학회논문집(구조계), 23권, 9호, 2007, pp. 151-158.
3 유재강, 최성우, 김용로, 강석표, 권영진, 김무한, “중성화에 영향을 미치는 물시멘트비와 마감재 종류에 관한 실험적 연구,” 한국콘크리트학회 가을학술대회 논문집, Vol. 11, No. 2, 1999, pp. 667-670.   과학기술학회마을
4 深谷泰文, 露木尙光, セメント·コンクリト材料科, 技術書院, 2006, pp. 151-154.
5 Kropp, J., Performance Criteria for Concrete Durability, E&FN Spon, London, 1995, pp. 103-111.
6 Castellote, M. and Andrade, C., “Modelling the Carbonation of Cementitious Matrixes by Means of the Unreacted-core Model, UR-CORE,” Cement and Concrete Research, Vol. 38, No. 12, 2008, pp. 1374-1384.   DOI   ScienceOn
7 前田孝一, “コンクリ一トの中性化の値解析にする硏究,” 日本建築學會構造系論文報告集, 1989, pp. 11-20.
8 田佳寬, 棚野博之, “コンクリ一トの中性化進行豫測モデル,” コンクリ一ト工學論文集, 1991, pp. 125-134.
9 岸谷孝一, 西澤紀昭, “コンクリ一ト構造物の耐久性シリ一ズ中性化,” 技報堂, 1988, pp. 34-40.
10 福島敏夫, “コンクリ一トの中性化進行にする基礎的考察,” 日本建築學會學術講演梗槪集, 1983, pp. 199-200.