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Modeling of Chloride Ingress in Reinforced Concrete Structures
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 Title & Authors
Modeling of Chloride Ingress in Reinforced Concrete Structures
Koo, Hyun-Bon; Kim, Eui-Tae; Lee, Kwang-Myong;
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 Abstract
The degradation of reinforced concrete (RC) structures due to physical and chemical attacks has been a major issue in construction engineering. Deterioration of RC structures by chloride attack followed by reinforcement corrosion is one of the serious problems. An objective of this study is to develop a form of mathematical model of chloride ingress into concrete. In order to overcome some limits of the previous approaches, a chloride ingress model, consisting of chloride solution intrusion through the capillary pore and chloride ion diffusion through the pore water, was proposed. Moreover, the variability of chloride ion diffusivity due to the degree of hydration of cement, relative humidity in pore, exposure condition, and variation of chloride binding, was considered in the model. In order to verify the proposed model, the results predicted by the proposed model were compared with analysis results of Life-365, a computer program for predicting the service life of reinforced concrete structures exposed to chlorides. In conclusion, the proposed model would be promising to predict the chloride ion profile and to estimate the service life of RC structures.
 Keywords
degradation;chloride ingress;corrosion;degree of hydration;diffusion;
 Language
Korean
 Cited by
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한국콘크리트학회논문집, 2009. vol.21. 3, pp.377-386 crossref(new window)
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콘크리트내의 이중구조와 시간의존성을 고려한 염화물 해석기법의 개발,문진만;김진영;김영준;오경석;권성준;

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Analysis Technique for Chloride Penetration using Double-layer and Time-Dependent Chloride Diffusion in Concrete, Journal of the Korea institute for structural maintenance and inspection, 2015, 19, 5, 83  crossref(new windwow)
 References
1.
Tuutti, K. Corrosion of Steel in Concrete, Swedish Cement and Concrete Research institute, Stockolm,1982

2.
Saetta- A V., Scotta, R V., and Vitaliani, R V.,'Analysis of Chloride Diffusion into PartiallySaturated Concrete,' ACI Materials Journal, Vo1.90,No.5, 1993, pp.441-451

3.
Nagesh, M. and Bishwajit, B., 'Modelling of Chloride Diffusion in concrete in Concrete and Determination of Diffusion Coefficients,' ACI Materials Journal, Vo1.95, No.2, 1998, pp.113-120

4.
Bazant, Z. P. and Najjar, L. J., 'Nonlinear Water Diffusion in Non-Saturated Concrete,' Materials and Structures, Research and Testing, V. 5, No. 25,1972, pp.3-20

5.
Hansen, E. J. and Saouma, V. E. 'Numerical Simulation of Reinforced Concrete Deterioration -Part 1 : chloride diffusion,' ACI Materials Journal,Vol.96, No.2, 1999, pp.173-180

6.
Maage, M, Helland. S., Poulsen, E., Vennesland, $\Phi$,and Carlsen, J. E. 'Service Life Prediction of Existing Concrete Structures Exposed to MarineEnvironment,' ACI Materials Journal, Vol.93, No.6,1996, pp.902-608

7.
Amey, S. L., Johnson, D. A, Miltenberger, M A.,and Farzam, H. 'Predicting the Service Life of Concrete Marine Structures : An Environmental Methodology,' ACI Structural Journal, Vol. 95, No.2, 1998, pp.205-214

8.
장승엽, 염소이온의 확산 모델에 의한 염해를 받는 콘크리트 구조물의 내구성 예측 연구, 석사논문, 서울대학교, 1997

9.
김은겸, 콘크리트 구조물의 염화물 이온 침투 거동해석,' 한국콘크리트학회 논문집, 제9권 6호, 1997, pp.233-241

10.
박승범, 김도겸, '해양 구조물의 철근 부식 예측 기법개발에 관한 연구,' 한국콘크리트학회 논문집, 제11권6호, 1999, PP.89-100

11.
Byfors, J., Plain concrete at early ages, CBI report FO 3:8, Sweden, 1980

12.
Jonasson, J-E., Modelling of temperature, moisture and stresses in young concrete, PhD dissertation, Lulea University of Technology, 1994

13.
Cha, S. W., Modeling of Hydration Process and Analysis of Thermal and Hydral Stresses in Hardening Concrete, PhD dissertation, Seoul National University, Seoul, Korea, 1999

14.
Marten, J., Method of Measuring the Moisture Diffusivity at High Moisture Levels, Licentiate thesis, University of Lund, Sweden, 1997

15.
Hedenblad, G., 'The Use of Mercury Intrusion Porosity or Helium Porosity to Predict the Moisture Transport Properties of Hardened CementPaste,' Advanced Cement Based Materials, No.6,1997, pp.123-129

16.
Luping, T., and Nilsson, L. O., 'Rapid Determination of the Chloride Diffusivity in Concrete by Applying an Electrical Field,' ACI Materials Journal, 1992,pp.49-53

17.
Hussain, S. E., Al-Gahtani, A. S., and Rasheeduzzafar.,'Chloride Threshold for Corrosion of Reinforcement in Concrete' ACI Material Journal, Vol. 93, No. 6, 1996, pp. 534-538

18.
Bentz, E. C. and Thomas, M D. A, 'Life-366Service Life Prediction Model,' Silica Fume Association, 2001, pp.34-46