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http://dx.doi.org/10.11112/jksmi.2016.20.4.136

A Study on Correlation Between Cyclic Drying-Wetting Accelerated Corrosion Test and Long-term Exposure Test  

Park, Sang-Soon (Dept. of Civil Engineering, Sangmyung University)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.20, no.4, 2016 , pp. 136-143 More about this Journal
Abstract
There are various method for evaluating the durability life of concrete structures due to salt damage. The best way is to perform a corrosion test for a rebar embedded in concrete specimen was exposure to marine environment. However, this method has the disadvantage that it takes a long period of time. Also, accelerated corrosion test which was complemented complements the time-consuming weakness is limited to apply because it could not reveal a correlation between long-term exposure test. Accordingly, the purpose of this study is to derive a correlation coefficient between cycle drying-wetting accelerated corrosion test and long-term exposure test. Corrosion initiation time was measured in four types of concrete samples, i.e., two samples mixed with fly ash(FA) and blast furnace slag(BS), and the other two samples having two water/cement ratio(W/C = 0.6, 0.35) without admixture(OPC 60 and OPC 35). The accelerated corrosion test was carried out by two case, i.e., one is a cyclic drying-wetting method(case 1), and the other is a artificial seawater ponding test method(case 2). Whether corrosion occurs, it was measures using half-cell potential method. The results indicated that case 1 is to accelerated the corrosion of rebar about 24~36% as compared with case 2, then the corrosion of rebar embedded in concrete occurred according to the order of OPC60, FA, BS, OPC35. Correlation coefficient between accelerated corrosion test and long-term exposure test, case 1 is 4.23 to 5.42, and case 2 is 6.54 to 7.82.
Keywords
Accelerated corrosion test; Long-term exposure test; Corrosion of rebar; Cyclic drying-wetting condition; Correlation coefficient;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 R.K. Dhir, M.R. Jones, and H.E.H. Ahmed.(1991), Concrete Durability : Estimation of Chloride Concentration During Design Life, Magazine of Concrete Research, 43(154), 37-44.   DOI
2 A.V. Saetta, R.V. Scotta, and R.V. Vitaliani.(1993), Analysis of Chloride Diffusion into Partially Saturated Concrete, ACI Materials Journal, ACI, 90(47), 441-451.
3 M. Otieno, H. Beushausen and M. Alexander.(2014), Chloride-induced Corrosion of Steel in Cracked Concrete-Part II: Corrosion Rate Prediction Models, Cement and Concrete Research, 79, 386-394.
4 Oh, B.H., Lee, S.K., Lee, M.K., and Jung, S.H.(2005), Influence of Carbonation for Chloride Diffusion in Concrete, Journal of the Korea Concrete Institute, KCI, 17(2), 179-189.   DOI
5 Bae, S.H., Lee, K.M., Kim, J.S., and Kim, Y.S.(2007), Estimation of Critical Chloride Content for Corrosion of Reinforcing Steel in Concrete by Accelerated Corrosion Tests, Journal of the Korean Society of Civil Engineers, KSCE, 27(5), 771-776.
6 Yang, S.K., Kim, D.S., Um, T.S., Lee, J.R., and Katsuya K.(2008), Study on the Critical Threshold Chloride Contents for Steel Corrosion in Concrete with Various Cement Contents, Journal of the Korea Concrete Institute, KCI, 20(4), 416-421.
7 KS F 2599-2.(2008), Standard test method for the accelerated corrosion of reinforced concrete (wet-drying cycles method), Korean Industrial Standards.
8 ASTM G 109-99a.(1999), Standard Test Method for Determining the Effects of Chemical Admixtures on the Corrosion of Embedded Steel Reinforcement in Concrete Exposed to Chloride Environment, The American Society for Testing and Materials.
9 Park, S.S. and Jeong, J.W.(2014), A Study of Accelerated Corrosion Test and Chloride Penetration Analysis with Artificial Seawater Immersion Condition, Journal of the Korea Institute for Structural Maintenance and Inspection, ,KSMI, 18(1), 93-99.   DOI
10 NT Build 492.(1999), Concrete, Mortar and Cement-base Repair Materials : Chloride Migration Coefficient From Non-Stead-State Migration Experiments, Nordtest Method.
11 ASTM C 876-91.(1999), Standard Test Method for Half-cell Potentials of Un-coated Reinforcing Steel in Concrete, The American Society for Testing and Materials.
12 Park S.S and Lee M.W.(2014), Study on the Correlation Between Long-term Exposure tests and Accelerated Corrosion tests by the Combined Damage of Salts, Corrosion Science and Technology, KCSS, 13(6), 214-223.   DOI