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Influence of Porosity on the CO2 Diffusion Characteristic in Concrete
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 Title & Authors
Influence of Porosity on the CO2 Diffusion Characteristic in Concrete
Oh, Byung-Hwan; Jung, Sang-Hwa; Lee, Myung-Kue;
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The diffusivity of carbon dioxide in concrete is very important in that it directly affects the degree of carbonation in concrete structures. The purpose of the present study is to explore the diffusivity of carbon dioxide and to derive a realistic equation to estimate the diffusion coefficient of carbon dioxide in concrete. For this purpose, several series of concrete specimens have been tested. Major test variables were the water-cement ratios. The total porosities and the diffusion coefficients of carbon dioxide were measured for the specimens. The present study indicates that the measured porosities agree well with the calculated ones. The effects of porosity and relative humidity on the diffusion coefficient of carbon dioxide were examined. A prediction equation to estimate the diffusion coefficient of carbon dioxide was derived and proposed in this study. The proposed equation shows reasonably good correlation with test data on the diffusion coefficient of concrete
carbonation;relative humidity;porosity; diffusion coefficient equation;
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Stephen Brunauer, L. E. Copeland, 'The chemistryof concrete,' Scientific American, Vo1.210, No.4,1964, pp.80-92

H. F. W. Taylor, 'Cement chemistry,' Academic Press, London, 1990, pp.123-152

V. G. Papadakis, C. G. Vayenas, and M N. Fardis, 'Physical and chemical charactehstics affecdng the durability of concrete,' ACI Material Journal, March-April,88-M24, 1991, pp.186-196

V. G. Papadakis, C. G. Vayenas, and M N. Fardis, 'A reaction engineering approach to the problem of concrete carbonation,' AIChE Journal, October, Vol. 35, No. 10, 1989, pp.1639-1650 crossref(new window)

I. Soroka, 'Portland cement paste and concrete,'Chemical Publishing Co., Haifa, 1980, pp.30-39

오병환, 이명규, 정상화, '콘코리트의 기체확산계수측정장치 개발 및 응용', 대한토목학회 논문집, 제23권 제 1A호, 2003. 1, pp.77-84

R L Day and B. K. Marsh, 'Measurement of porosity in blended cement pastes,' Cement and Concrete Research, Vol. 18, No. 1, 1988, pp.63-73 crossref(new window)

'Standard practice for maintaining constant relative humidity by means of aqueous solution,' ASTM E104-85, 1996

Y. F. Houst and F. H. Wittmann, 'Influence of porosity and water content on the diffusivity of CO2 and O2 through hydrated cement paste,' Cement and Concrete Research Vol. 24, No. 6, 1994, DD.1165-1176 crossref(new window)

M. D. A Thomas and J. D. Matthews, 'Carbonation of fly ash conocrete,' Magazine of Concrete Research, Vol. 44, No. 160, September, 1992, PP.217- 228 crossref(new window)

N. I. Fattuhi, 'Carbonation of concrete as affected by mix constituents and initial water curing priod,'Materials and Structures, Vo1.19, No.110, February, 1986, pp.131-136 crossref(new window)

N. I. Fattuhi, 'Concrete carbonation as influenced by curing regime,' Cement and Concrete Research, Vol.18, No.3, 1988, pp.426-430 crossref(new window)