Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
권호 표지
DOI QR코드

DOI QR Code

Variation of Half Cell Potential Measurement in Concrete with Different Properties and Anti-Corrosive Condition

콘크리트 특성에 따른 반전위 측정값의 변화와 부식제어 조건

  • Received : 2013.05.09
  • Accepted : 2013.07.19
  • Published : 2013.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

Half Cell Potential (HPC) technique has been widely adopted for its quantitative evaluation of corrosion possibility. In this study, RC specimens with three different cover depths (10mm, 30mm, and 60mm) and w/c ratios (0.35, 0.55, and 0.70) are prepared and accelerated salt spray test (SST) is performed for 45 days. Steel corrosion occurs in the specimens with 0.55 of w/c and 10mm of cover depth. In the case of 0.70 of w/c and 30mm of cover depth, steel corrosion is also monitored. Considering the effect of cover depth and w/c ratio, HCP evaluation equation is proposed and the condition which can control steel corrosion is obtained. Furthermore, anti-corrosive conditions containing w/c ratio and cover depth are analyzed through Life 365 program and the conditions are compared with the results from this study.

비파괴 기법중 반전위 측정법은 부식가능성을 정량적으로 판별할 수 있으므로 꾸준하게 사용되고 있다. 본 연구에서는 피복두께를 10, 30, 60mm, 물-시멘트비를 0.35, 0.55, 0.70으로 변화시킨 RC 시편을 대상으로 비말대 지역을 모사한 촉진염해분무실험을 수행하였다. 45일간의 촉진 염해 분무시험을 수행한 뒤, RC 시편에 대하여 반전위값을 측정하였다. w/c 0.55 조건에서 피복두께가 10mm인 RC 시편은 부식이 발생하였으며, w/c 0.7인 경우 피복두께 30mm인 시편에서도 부식이 발생하였다. 실험결과를 이용하여 물-시멘트비와 피복두께를 변수로 하는 반전위 평가식을 제안하였으며, 비말대지역에서 부식을 억제할 수 있는 조건을 도출하였다. 또한 Life 365 프로그램을 이용하여 비부식 조건의 w/c와 피복두께를 분석하였으며, 본 연구의 결과인 반전위 측정값과 비교하였다.

Keywords

References

  1. ASTM C876-09, Standard Test Method for Corrosion Potentials of Uncoated Reinforcing Steel in Concrete, 2009, pp.1-6.
  2. Baek, S. H., Xue, William, Feng, M. Q., Kwon, S. J., "Nondestructive Corrosion Detection in RC Through Integrated Heat Induction and IR Thermograph", Journal of Non Destructive Evaluation, Vol. 31, No. 2, 2012, pp.181-190.
  3. Broomfield, J. P., Corrosion of Steel in Concrete: Understanding, Investigation and Repair. London: E&FN, 1997, pp.1-15.
  4. Guthrie, W. S., Pinkerton, T. M., Eggett, D. L., Sensitivity of Half Cell Potential Measurements to Properties of Concrete Bridge Deck, Report No.UT-08.21, October 2008, pp.36-50.
  5. KCI-Korea Concrete Institute. Concrete Standard Specification -Durability Part, 2004, pp.12-19 (in Korean).
  6. Kim, K. B., A Study on Allowable Crack Width of Reinforced Concrete Flexural Beam Subjected to Corrosive Environment, Yonsei University, Dissertation of MS, 2001, pp.35 (in Korean).
  7. Kwon, S. J., Park, S. S., "Non Destructive Technique for Steel Corrosion Detection Using Heat Induction and IR Thermography", Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 16, No. 2, 2012, p.40 (in Korean). https://doi.org/10.11112/jksmi.2012.16.2.040
  8. Kwon, S. J., Song, H. W., "Analysis of Carbonation Behavior in Concrete Using Neural Network Algorithm and Carbonation Modeling", Cement and Concrete Research, Vol. 40, No. 1, 2010, pp.119-127. https://doi.org/10.1016/j.cemconres.2009.08.022
  9. Leelalerkiet, V., Kyung J. W., Ohtsu, M., Yokota, M., Yokota., M., "Analysis of Half-Cell Potential Measurement for Corrosion of Reinforced Concrete", Construction and Building Materials, Vol. 18, No. 3, pp.155-162.
  10. Lim, Y. C., "A styudy on the Estimation of Moisture Condition of Concrete by Resistivity Method", Journal of Korea Architecture Institute, Vol. 28, No. 12, 2012, pp.69-76 (in Korean).
  11. Otsuki, N., Nagatataki, S. and Nakashita, K, "Evaluation of $AgNO_3$ Solution Spray Method for Measurement of Chloride Penetration into Hardened Cementitious Matrix Materials", ACI Materials Journal, Vol. 89, No. 6, 1992, pp.587-592.
  12. RILEM, Durability Design of Concrete Structures. Report of RILEM Technical Committee 130-CSL, E&FN, 1994, pp.28-52.
  13. So, H. S., "Environmental Influences and Assessment of Corrosion Rate of Reinforcing Bars Using the Linear Polarization Resistance Technique", Journal of Korea Architecture Institute, Vol. 22, No. 2, 2006, pp.107-114 (in Korean).
  14. Song, H. W., Lee, C. H., Lee, K. C., "A study on Corrosion Potential of Cracked Concrete Beam According to Corrosion Resistance Assessment", Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 97, No. 1, 2009, pp.97-105 (in Korean).
  15. Song, H. W., Pack, S. W., Lee, C. H., Kwon, S. J., "Service Life Prediction of Concrete Structures Under Marine Environment Considering Coupled Deterioration", Journal of Restoration and Building Monuments, Vol. 12, 2006, pp.265-284.
  16. Thomas, M. D. A., Bentz, E. C., Computer program for predicting the service life and life-cycle costs of reinforced concrete exposed to chlorides. Life 365 Manual, SFA, 2002, pp.28-56.

Cited by

  1. 반전위 측정을 통한 원주 법천사지 지광국사탑 모르타르 복원부위 상태평가 연구 - 옥개석 모르타르 복원부위를 중심으로 - vol.34, pp.6, 2013, https://doi.org/10.12654/jcs.2018.34.6.06