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

  • 제27권5호
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  • Pages.16-22
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  • 2023
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  • 2234-6937(pISSN)
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  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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플라이애시를 혼입한 콘크리트의 전위차 적정법과 XRF를 이용한 염화물 침투 분석

Chloride Penetration Analysis of Fly Ash Concrete using Potentiometric Titration and XRF

  • 서은아 (한국건설기술연구원 구조연구본부 ) ;
  • 김지현 (부경대학교 공학연구원 융복합인프라기술연구소 ) ;
  • 이호재 (한국건설기술연구원 구조연구본부 )
  • 투고 : 2023.08.16
  • 심사 : 2023.09.11
  • 발행 : 2023.10.31
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초록

이 연구는 원전 콘크리트 배합설계를 모사한 콘크리트 시험체에 대하여 염수침지 실험을 수행하였으며, 시험체 깊이에 따른 염화물량과 XRF 성분의 상관관계를 분석하였다. 원전 콘크리트의 표면부의 염화물량은 염수 침지기간이 증가함에 따라 소폭 증가하였으나, 깊이 5.5 mm 이상의 콘크리트 시험체 내부 염화물량은 염수 침지기간이 증가함에 증가하는 경향이 뚜렷하게 나타났다. 콘크리트의 염화물량과 XRF 성분의 상관관계 분석결과, OPC 배합과 비교하여 FA가 20% 치환된 배합은 XRF 성분분석을 통한 Cl 이온의 구성비율과 염해저항성 평가결과의 상관관계가 매우 높게 나타났다. 이에 따라 FA가 20% 치환된 원전 콘크리트 배합에서는 반복적인 데이터 누적을 통해 XRF 성분분석을 통하여 염소이온분석 및 염해저항성능 평가가 가능함을 확인하였다.

In this study, a salt water immersion test was performed on concrete specimens simulating the concrete mix design of the nuclear power plant, and the correlation between the amount of chloride and the XRF component according to the depth of the concrete was analyzed. The amount of chloride on the surface of the nuclear power plant concrete increased slightly with increasing immersion time in salt water, but the amount of chloride in the depth of 5.5 mm or more showed a clear tendency to increase with increasing immersion time in salt water. As a result of analyzing the correlation between the amount of chloride in concrete and the XRF component, the concrete with 20% FA substitution compared with the OPC concrete showed a very high correlation between the composition ratio of Cl ions and the evaluation result of salt damage resistance by XRF component analysis. Accordingly, it was confirmed that chlorine ion analysis and salt damage resistance performance evaluation by XRF component analysis were possible through repeated data accumulation in the nuclear power plant concrete mix with 20% fly ash replacement.

키워드

과제정보

본 연구는 원자력안전위원회의 재원으로 한국원자력안전재단의 지원을 받아 수행한 원자력안전연구사업의 연구결과입니다(No. 2203025).

참고문헌

  1. Choinska, M., Khelidj, A., Chatzigeorgiou, G., and Pijaudier-Cabot, G. (2007), Effects and interactions of temperature and stress-level related damage on permeability of concrete, Cement and Concrete Research, 37(1), 79-88.  https://doi.org/10.1016/j.cemconres.2006.09.015
  2. Jeong, J. E., Jang, Y. R., Kim, G. U., Heo, S. C., and Min, J. S. (2013), The analytical application for cement using X-Ray diffraction and X-Ray fluorescence spectrometer, Analytical Science and Technology, 26(5), 340-351 (in Korean).  https://doi.org/10.5806/AST.2013.26.5.340
  3. Kang, H., Kang, S. H., Jeong, Y., and Moon, J. (2020), Quantitative Analysis of Hydration Reaction of GGBFS Using X-ray Diffraction Methods, Journal of Korea Concrete Institute, 32(3), 241-250 (in Korean).  https://doi.org/10.4334/JKCI.2020.32.3.241
  4. Kim, C. Y., and Shin, M. S. (2021), Seismic Performance Assessment on Containment Structure Considering the Change in Structural Behavior Due to Material Degradation. Proceedings of the Korea Concrete Institute, 33(2), 721-722 (in Korean). 
  5. Kim, N. D., and Park, S. J., (2014), Effects of Mineral Admixtures on Chloride Binding of Offshore Concrete, Journal of the Architectural Institute of Korea Structure & Construction, 30(6), 67-74 (in Korean). 
  6. Koh, T. H., and Kwon S. J. (2019), Changes in Cement Hydrate Characteristics and Chloride Diffusivity in High Performance Concrete with Ages, Journal of Korea Institute of Structural Maintenace and Inspection, 23(6), 9-17 (in Korean). 
  7. KS F 2713 (2022), Standard test method for analysis of chloride in concrete and concrete raw materials (in Korean). 
  8. KS F 2714 (2022), Standard test method for acid-soluble chloride in mortar and concrete (in Korean). 
  9. KS F 2715 (2022), Standard test method for water-soluble chloride in mortar and concrete (in Korean). 
  10. Lee, C. M. (2019), Study on the prediction concrete service life for nuclear power plant, Ph.D. Thesis, Department of Civil Engineering Graduate School, Daejin University (in Korean). 
  11. Lee, H. J., and Seo, E. A. (2022), Experimental Study for Evaluation of Chloride Ion Diffusion Characteristics of Concrete Mix for Nuclear Power Plant Water Distribution Structures, Journal of Korea Institute of Structural Maintenace and Inspection, 26(5), 112-118 (in Korean). 
  12. Park, W. J. (2021), Analysis of Chloride Penetration in Mortar Sections using Laser Induced Breakdown Spectroscopy, Journal of The Korea Institute of Building Construction, 21(6), 583-591 (in Korean).  https://doi.org/10.5345/JKIBC.2021.21.6.583
  13. Ministry of Land, Infrastructure and Transport (MOLIT) (2021). Detailed Guidelines for the Safety and Maintenance of Facilities (Part of Safety Inspection and Precise Safety Diagnosis). Jinju: Korea Authority of Land & Infrastructure Safety (in Korean). 
  14. Moon, I. H., Kim, T. Y., and Jeong, J. A. (2010), Design and Durability of Concrete Structure in Nuclear Power Plant, Magazine of the Korea Concrete Institute, 22(6), 44-49 (in Korean).  https://doi.org/10.22636/MKCI.2010.22.6.44
  15. Shakouri, M., and Trejo, D. (2017), A time-variant model of surface chloride build-up for improved service life predictions, Cement and Concrete Composites, 84, 99-110.  https://doi.org/10.1016/j.cemconcomp.2017.08.008
  16. Shin, H. S., Hong, J. K., Kim, J. S., Chung, Y. K., Jhung, M. J., Chung, H. D., and Choi, Y. H. (2011), Development of Regulation on the Integrated Materials Aging Management for Nuclear Facilities, Transactions of the Korean Society of Pressure Vessels and Piping, 7(4), 12-18 (in Korean).  https://doi.org/10.20466/KPVP.2011.7.4.012
  17. Ukpata, J. O., Ogirigbo, O. R., and Black, L. (2022), Resistance of Concretes to External Chlorides in the Presence and Absence of Sulphates: A Review, Applied Sciences, 13(1), 182. 
  18. Wang, J., Basheer, P. A. M., and Nanukuttan, S. V. (2016), Influence of service loading and the resulting micro-cracks on chloride resistance of concrete, Construction and Building Materials, 108, 56-66 (in Korean).  https://doi.org/10.1016/j.conbuildmat.2016.01.005
  19. Yoon, Y. S., and Kwon, S. J. (2019). Evaluation of Apparent Chloride Diffusion Coefficient and Surface Chloride Contents of FA concrete Exposed Splash zone Considering Crack Width, Journal of Korea Institute of Structural Maintenace and Inspection, 23(6), 18-25 (in Korean).