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온도조건에 따른 철근부식 촉진시험과 장기폭로시험의 상관성에 관한 연구

A Study on Correlation Between Accelerated Corrosion Test and Long-term Exposure Test According to the Temperature Condition

  • 박상순 (상명대학교 건설시스템공학과) ;
  • 소병탁 (상명대학교 건설시스템공학과)
  • Park, Sang-Soon (Department of Civil Environmenal Engineering, Sangmyung University) ;
  • So, Byung-Tak (Department of Civil Environmenal Engineering, Sangmyung University)
  • 투고 : 2016.06.09
  • 심사 : 2016.06.21
  • 발행 : 2016.06.30

초록

본 논문에서는 침지내 환경을 재현한 철근부식촉진시험과 장기폭로시험을 실시하였다. 환경조건을 변수로 시험을 실시하였으며, 반전지전위법을 통한 철근부식 모니터링을 실시하였다. 부식촉진 시험결과 시험조건 별 상관계수 도출을 할 수 있었다. 촉진시험은 온도조건에 따라 인공해수의 온도가 $20^{\circ}C$인 case 1과 $65^{\circ}C$인 case 2로 구분하여 실시하였다. 고온 조건인 case 2가 1.7~1.8배 정도 상온조건인 case 1에 비해 부식을 촉진시키는 것으로 나타났으며, 해양환경시험장에서의 장기폭로시험결과와의 비교를 통해 case 1의 경우 2.45~2.94의 상관계수를 case 2의 경우 4.37~4.99의 상관계수를 나타내었다.

In this study, to clarify the differences rebar corrosion beginning, through the actual corrosion accelerated test in corrosion time and laboratory test chamber of the structure of the marine environment results in both environments, it is an object of correlation coefficient derived. The accelerated corrosion test was carried out by two case, I.e., one is $20^{\circ}C$ of low temperaure codition(case 1), and the other is $65^{\circ}C$ of high temperaute codition(case 2). Whether corroions occurs, it was measures using half-cell potential method. The results indicated that case 2 is to acclerate the corrosion of rebar about 1.7~1.8 times as compared with case 1, thenthe corrosion of rebar embadded in concrete occurred according to the order of OPC60, FA, BS, OPC35. Correlation coefficient between acclerated corrosion test and long-term exposure test, case 1 is 2.45 to 2.94, and case 2 is 4.37~4.99.

키워드

참고문헌

  1. ASTM C 876-91. (1999). Standard Test Method for Half-cell Potentials of Uncoated Reinforcing Steel in Concrete.
  2. ASTM G 109. (2007). Standard Test Method for Determining the Effects of Chemical Admixtures on Corrosion of Embedded Steel Reinforcement in Concrete Exposed to Chloride Environments.
  3. Bae, S.H., Lee, K.M., Kim, J.S., 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, 27(5), 771-776 [in Korean].
  4. DuraCrete (2000). Final Technical Report General Guidelines for Durability Design and Redesign, The European Union- Brite DuRam III, Document BE95-1347/R17.
  5. Gower, K.R., Millard, S.G. (1999). Measurement of concrete resistevity for assessment of corrosion severity of steel using wenner technique, ACI Materials Journal, 96(5), 536-541.
  6. KS F 2599-2. (2008). Standard Test Method for the Accelerated Corrosion of Reinforced Concrete(Wet-drying Cycles Method), Korean Industrial Standards [in Korean].
  7. KS F 2713. (2012). Analysis Test Methods Chloride of Concrete and Concrete Material, Korean Industrial Standards [in Korean].
  8. Oh, B.H., Lee, S.K., Lee, M.K., Jung, S.H. (2005). Influence of carbonation for chloride diffusion in concrete, Journal of the Korean Concrete Institute, 17(2), 179-189 [in Korean]. https://doi.org/10.4334/JKCI.2005.17.2.179
  9. Park, S.S., 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, 18(1), 93-99 [in Korean]. https://doi.org/10.11112/jksmi.2014.18.1.093
  10. Park, S.S., 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, 13(6), 214-223 [in Korean]. https://doi.org/10.14773/cst.2014.13.6.214
  11. Saetta, A.V., Scotta, R.V., Vitaliani, R.V. (1993). Analysis of chloride diffusion into partially saturated concrete, ACI Materials Journal, 90(47), 441-451.