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http://dx.doi.org/10.11112/jksmi.2013.17.6.104

Modeling on Chloride Diffusivity in Concrete with Isotropic and Anisotropic Crack  

Lee, Hack-Soo (한남대학교 건설시스템공학과)
Bae, Sang-Woon (다산컬설턴트)
Kwon, Seung-Jun (한남대학교 건설시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.17, no.6, 2013 , pp. 104-111 More about this Journal
Abstract
Deterioration is accelerated due to additional intrusion of chloride ion in crack width in cracked concrete. In this paper, modeling on equivalent diffusion coefficient in cracked concrete is performed for 1-D (Anisotropic) and 2-D (Isotropic) diffusion based on steady state condition. In the previous research, rectangular shape of crack was considered but the shape was modified to wedge shape with torturity. For verification of the proposed model, crack is induced in concrete sample and migration test in steady state is performed for 1-D diffusion. For 2-D diffusion, previous test results are adopted for verification. Through considering wedge shape of crack with torturity, diffusion coefficients in 1-D and 2-D diffusion are reduced, and the more reasonable prediction is obtained. The results from the proposed model with torturity of 0.10~0.15 are shown to be in the best agreement with the test results.
Keywords
Crack; Chloride diffusion coefficient; Wedge shape crack; Crack torturity;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Andrade, C., "Calculation of chloride diffusion coefficients in concrete from ionic migration measurement", Cement and Concrete Research, Vol. 23, No. 3, 1993, pp.724-742.   DOI   ScienceOn
2 Gerard, B., Marchand, J., "Influence of cracking on the diffusion properties of cement-based materials Part I: Influence of continuous cracks on the steady-state regime", Cement and Concrete Research, Vol. 30, No. 2, pp.37-43.   DOI   ScienceOn
3 Ishida, T., Maekawa, K., "Modeling of PH profile in pore water based on mass transport and chemical equilibrium theory", Concrete Library of JSCE, Vol. 37, No. 1, 2001, pp.151-166.
4 Jacobsen, S., Marchand, J., Boisvert, L., "Effect of cracking and healing on chloride transport in OPC concrete", Cement and Concrete Research, Vol. 26, No. 6, 1996, pp.869-881.   DOI   ScienceOn
5 JSCE - Concrete Committee. Standard Specification for Concrete Structures, 2002.
6 Korea Concrete Institute. Concrete standard specification -Durability Part, 2004 (in Korean).
7 Kwon, S. J., Lee, H. S., Park, S. G., "Effect of additional water on durability and pore size distribution in cement mortar", Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 3, No. 3, 2012, pp.75-83.   과학기술학회마을   DOI   ScienceOn
8 Kwon, S. J., Na, U. J., Park, S. S., Jung, S. H., "Service life prediction of concrete wharves with early-aged crack : Probabilistic approach for chloride diffusion", Structural Safety, Vol. 31, No.1, 2009, pp.75-83.   DOI   ScienceOn
9 Maekawa, K., Ishida, T., Kishi, T., Multi-Scale Modeling of Structural Performance, Taylor & Francis, 2009, pp.322-325.
10 Park, S. S., Kwon, S. J., Jung, S. H., "Analysis technique for chloride penetration in cracked concrete using equivalent diffusion and permeation", Construction and Building Materials, Vol. 29, No. 2, 2012b, pp.183-192.   DOI   ScienceOn
11 Park, S. S., Kwon, S. J., Jung, S. H., Lee, S. W., "Modeling of water permeability in early aged concrete with cracks based on micro pore structure", Construction and Building Materials, Vol. 27, No. 1, 2012a, pp.597-604.   DOI   ScienceOn
12 Song, H. W., Kwon, S. J., Byun, K. J., Park, C. K., "Predicting carbonation in early-aged cracked concrete", Cement and Concrete Research, Vol. 36, No. 5, 2006, pp.979-989.   DOI   ScienceOn
13 Park, S. S., Song, H. W., Byun, K. J., "Model for chloride diffusivity and water permeability in cracked concrete", J. of KSCE, Vol. 21, No. 6-B, 2001, pp.925-924 (in Korean).   과학기술학회마을
14 Song, H. W., Cho, H. J., Park, S. S., Byun, K. J,. Maekawa, K., "Early-age cracking resistance evaluation of concrete structure", Concrete Science Engineering, Vol. 3, No. 1, 2001, pp.62-72.
15 Song, H. W., Kim, H. J., Kwon, S. J., Lee, C. H., Byun, K. J., Park, C. K., "Prediction of service life in cracked reinforced concrete structures subjected to chloride attack and carbonation", 6th International Congress Global Construction: Ultimate Concrete Opportunities, Dundee, Scotland, 5-7 July, Vol. Cement Combinations for Durable Concrete, 2005b, pp.767-776.
16 Song, H. W., Kwon, S. J., Byun, K. J., Park. C. K., "A Study on analytical technique of chloride diffusion considering characteristics of mixture design for high performance concrete using mineral admixture", Journal of KSCE, Vol. 25, No. 1A., 2005a, pp.213-223 (in Korean).   과학기술학회마을
17 Song, H. W., Pack, S. W., Lee, C. H., Kwon, S. J., "Service life Prediction of concrete structures under marine environment considering coupled deterioration", J. of Restoration of Buildings and Monuments, Vol. 12, No. 4, 2006, pp.265-284.
18 Thomas, M. D. A., Bamforth, P. B., "Modeling chloride diffusion in concrete: Effect of fly ash and slag", Cement and Concrete Research, Vol. 29, No. 4, 1999, pp.487-495.   DOI   ScienceOn
19 Yokozeki, K., Okada, K., Tsutsumi, T., Watanabe, K., "Prediction of the service life of RC with crack exposed to chloride attack", Japan Symposium of Rehabilitation of Concrete Structure, Vol. 10. No. 1, 1998, pp.1-6.
20 Win, P. P., Watanabe, M., Machida, A., "Penetration profile of chloride ion in cracked reinforced concrete", Cement and Concrete Research, Vol. 34, No. 2, 2004, pp.1073-1079.   DOI   ScienceOn