[논문]원전 취배수 구조물 콘크리트 배합의 염소이온 확산특성 평가를 위한 실험적 연구

이호재; 서은아

doi:10.11112/jksmi.2022.26.5.112

원전 취배수 구조물 콘크리트 배합의 염소이온 확산특성 평가를 위한 실험적 연구
Experimental Study for Evaluation of Chloride Ion Diffusion Characteristics of Concrete Mix for Nuclear Power Plant Water Distribution Structures 원문보기

한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.26 no.5, 2022년, pp.112 - 118

이호재 (한국건설기술연구원 구조연구본부) , 서은아 (한국건설기술연구원 구조연구본부)

초록
AI-Helper

이 연구는 원전 안전성 관련 구조물의 콘크리트 배합설계를 이용하여 확산특성을 평가하였다. 원전안전성관련 콘크리트 구조물 중 해수에 침지되거나 간만대에 위치하는 취배수구조물의 배합을 선정하여 압축강도, 전기전도도에 의한 염소이온 침투저항성 평가, 염수침지를 통한 확산특성을 분석하였다. 원전 콘크리트 구조물의 설계기준강도인 91일까지 재령에 따라 1, 7, 14, 28, 56, 91일에 압축강도를 측정했으며, 재령 28, 91일에 염소이온 침투저항성 평가를 실시했다. 재령 28일 콘크리트 시험체를 28일간 염수에 침지한 뒤 깊이별 시료를 채취하여 염화물량을 분석함으로써 확산계수를 도출하였다. 결과적으로 보통포틀랜드시멘트를 100% 사용한 콘크리트보다 플라이애시가 20% 치환된 원전 콘크리트 배합이 28일 이후 장기적인 강도증진 효과가 더 높게 나타났다. 또한 원전콘크리트 배합이 보통포틀랜드시멘트를 100% 사용한 배합보다 염소이온 침투저항성이 높고 확산계수도 더 낮게 나타나 염해에 대한 저항성이 더 높은 것으로 나타났다.

Abstract ▼ AI-Helper

In this study, the diffusion characteristics were evaluated using the concrete mix design of nuclear safety-related structures. Among the concrete structures related to nuclear power safety, we selected the composition of intake and drainage structures that are immersed in seawater or located on the tidal platform and evaluated the chloride ion permeation resistance by compressive strength and electrical conductivity and the diffusion characteristics by immersion in salt water. analyzed. Compressive strength was measured on the 1st, 7th, 14th, 28th, 56th, and 91st days until the 91st day, which is the design standard strength of the nuclear power plant concrete structure, and chloride ion permeation resistance was evaluated on the 28th and 91st. After immersing the 28-day concrete specimens in salt water for 28 days, the diffusion coefficient was derived by collecting samples at different depths and analyzing the amount of chloride. As a result, it was found that after 28 days, the long-term strength enhancement effect of the nuclear power plant concrete mix with 20% fly ash replacement was higher than that of concrete using 100% ordinary Portland cement. It was also found that the nuclear power plant concrete mix has higher chloride ion permeation resistance, lower diffusion coefficient, and higher resistance to salt damage than the concrete mix using 100% ordinary Portland cement.

주제어

표/그림 (12)

그림 Fig. 1 Sieve test result of fine aggregate
그림 Fig. 2 RCPT preparation
표 Table 1 Mix proportion
표 Table 2 Chemical composition of binder
그림 Fig. 3 Specimen preparation for exposure test
그림 Fig. 4 Vicat test results
그림 Fig. 5 Compressive strength results
그림 Fig. 6 RCPT result
표 Table 3 Predicted models of compressive strength
표 Table 4 Compressive strength ratio compare at 28 days result
그림 Fig. 7 Chloride contents penetration depth
그림 Fig. 8 Diffusion coefficient result

참고문헌 (20)

ACI Committee 365 (2000), Service Life Prediction State of the Art Report
ACI Committee 209 (1997), Prediction of Creep, Shrinkage and Temperatrue Effects in Concrete Structures, American Concrete Institute.
An, J.-H., Jeon, S.-I., Nam, J.-H., and Kwon, S.-A. (2011), An Experimental Study on Relation between compressive strength and Shear Wave velocity for characteristics of coarse aggregate size and type of cement, J. Korean Soc. Road Engineers, 13(1) 169-175.
ASTM C 39/C 39M (2021), Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens.
ASTM C 136 (2006), Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates
ASTM C 1202 (2019), Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration.
ASTM C 191 (2021), Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle.
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, Cem. Concr. Res., 37(1), 79-88.

상세보기
CEB-FIP (1999), Structural Concrete : Textbook on Behaviour, Design and Performance, International Federation for Structural Concrete (Fib), 224.
CEB-FIP, (2006), Model Code for Service Life Design, The International Federation for Structural Concrete (fib), Task Group 5.6, 16-33.
Korea Institute of Nuclear Safety (1993), Development of Safety Assessment Technique on the Structural Aging Degradations in NPP Concrete Structures, KINS/GR-062.
Korea Institute of Construction Technology (1996), Deterioration of Safety Related Concrete Structures in Nuclear Power Plants.
Kim, D.-H., Lee, S.-S., Song, H.-Y., and Kim, E.-Y. (2004). An experimental study on the properteis of concrete according to G/S ratio classified by maximum size of coarse aggregate, J. Korea Inst. Bld. Const., 4(2), 97-103.
KS L ISO 9597 (2019), Determination of setting time and soundness of cements.
KS F 2711 (2017), Standard test method for resistance of concrete to chloride ion penetration by electrical conductance.
Lee, C.-M., Yoon, E.-S., and Kim, S.-S. (2019), A Study of Time Dependent Diffusion for Prediction Service Life in NPPs Safety Related Concrete Structures, J. Korea Inst. Struct. Maint. Insp., 23(3), 136-142.
Lee, S.-H., and Kwon, S.-J. (2012), Experimental study on the relationship between time-dependent chloride diffusion coefficient and compressive strength, J. Korea Conc. Inst., 24(6) 715-726.

원문보기 상세보기
Ministry of Land Infrastructure and Transport (MLIT) (2009), Concrete Standard Specification Appendix II Evaluation Concrete Durability, 637-672.
Shakouri, M., and Trejo, D. (2017), A time-variant model of surface chloride build-up for improved service life predictions, Cem. Concr. Compos., 84, 99-110.

상세보기
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, Constr. Build. Mater, 108, 56-66.

상세보기

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