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http://dx.doi.org/10.4334/JKCI.2005.17.2.179

Influence of Carbonation for Chloride Diffusion in Concrete  

Oh Byung-Hwan (Dept. of Civil Engineering, Seoul National University)
Lee Sung-Kyu (Korea Institute of Nuclear Safety)
Lee Myung-Kue (Dept. of Civil Engineering, Jeonju University)
Jung Sang-Hwa (Dept. of Civil Engineering, Jeonju University)
Publication Information
Journal of the Korea Concrete Institute / v.17, no.2, 2005 , pp. 179-189 More about this Journal
Abstract
Corrosion of steel due to chloride attack is a major concern in reinforced concrete structures which are located in the marine environments. In this case, Fick's 2nd law has been used for the prediction of chloride diffusion related with service life of concrete structures. However, those studies were confined mostly to the single deterioration due to chloride only, although actual environment is rather of combined type. The purpose of the present study is, therefore, to explore the influences of carbonation to chloride attack in concrete structures and to investigate the validity of Fick's law to chloride attack combined carbonation. The test results indicate that the chloride ion profiles from Fick's law using the diffusion coefficient of immersion tests is not reflected the effect of separation of chloride ions in carbonation region but valid in sound region in case of combined action. On the other hand, the chloride ion profiles from Fick's law using the diffusion coefficient of Tang and Nilsson's method coincide with test results under dry-wet condition but not under combined condition. The results of present study may Imply that the new method for the measurement of diffusion coefficient is required to predict the chloride ion profiles in case of combined action at early.
Keywords
chloride ion diffusion; carbonation; diffusion law; diffusion coefficient;
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1 김은겸, '콘크리트 구조물의 염화물 이온 침투 거동 해석', 콘크리트학회 논문집, 9권 6호, 1997. 12, pp.233-241
2 Sandberg, P., Tang, L., and Andersen, A., 'Recent studies of chloride ingress in uncracked marine concrete at various exposure times and elevations,' Cement and Concrete Research, Vol.28, No.10, 1998, pp.1489-1503   DOI   ScienceOn
3 Thomas, M, 'Chloride thresholds in marine concrete,' Cement and Concrete Research, Vol.26, No.4, 1996, pp.513-519   DOI   ScienceOn
4 Papadakis, V. G., Vayenas, C. G., and Fardis, M. N., 'A reaction engineering approach to the problem of concrete carbonation,' AIChE Journal, Vol.35, No.10, Oct. 1989, pp.1639-1650   DOI
5 CEB Task Groups, New approach to durability design, CEB Bullitin d'Information, Lausanne, No.238, May 1997
6 Clifton, J. R. and Knab, L. I., Service life cf concrete, NISTIR 89-4086, National Bureau of Standards U.S. Department of Commerce, USA, 1989, pp.29-47
7 ASTM C1152-97, Standard test method for acid-soluble chloride in mortar and concrete, ASTM, Philadelphia, 1997
8 ASTM C1218-97, Standard test method for water-soluble chloride in mortar and concrete, ASTM, Philadelphia, 1997
9 Tang, L. and Nilsson, L. O., 'A Discussion of the Paper-Calculation of Chloride Diffusivity in Concrete from migration Experiment in Non-steady state Condition,' Cement and Concrete Research Vol.25, No.5, 1995, pp.H33-1137
10 문한영 외, '해수 침식을 받은 콘크리트의 성능저하 원인 규명', 대한토목학회 논문집, 22권 1A호, 2002. 1, pp.171-179
11 Tang, L. and Nilsson, L. O., 'Rapid determination of the chloride diffusivity in concrete by applying an electrical field,' ACI Material Journal, 1992, pp.49 -53
12 Kdroff, J. and Hilsdorf, H. K., Performance Creteria for Concrete Durability, RILEM report 12, E & FN Spon, London, 1995, pp.4-7
13 Abramowitz, M. and Stegun, I. A., Handbook of Mathematical Functions, Dover Publications, Inc, New York, 1970
14 한국콘크리트학회, '콘크리트진단 및 유지관리', 기문당, 2002. pp.96-105
15 Bakker, R. F. M., Corrosion cf steel in concrete, Report of the Technical Committee 60-CSC, RILEM, 1988, pp.47-54