[논문]가혹 조건에서 양생된 콘크리트의 염화물 확산과 공극 특성의 상관관계 비교

최소영; 양성준; 김일순; 양은익

doi:10.11112/jksmi.2023.27.4.54

[국내논문] 가혹 조건에서 양생된 콘크리트의 염화물 확산과 공극 특성의 상관관계 비교
Comparison of Correlation between Chloride Diffusion and Pores Characteristics in Concrete Cured under Extreme Condition 원문보기

한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.27 no.4, 2023년, pp.54 - 61

최소영 (강릉원주대학교 방재연구소) , 양성준 (신성엔지니어링 구조부) , 김일순 (강릉원주대학교 방재연구소) , 양은익 (강릉원주대학교 건설환경공학과)

초록
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본 논문은 가혹 조건을 고려하여 양생시킨 콘크리트를 대상으로 양생 조건이 콘크리트의 공극과 염화물 확산에 미치는 영향을 분석하고자 재령 28일에서의 압축강도, 공극 특성 및 염화물 확산계수를 각각 측정하였다. 연구 결과에 따르면, 상대습도가 증가함에 따라 압축강도가 개선되었으며, 양생 온도 35 ℃에서 가장 큰 압축강도를 보이나, 45 ℃에서 양생을 실시한 경우, 오히려 강도가 감소하였다. 이와 달리, 염화물 확산계수는 온도 및 상대습도가 증가할수록 감소하므로 압축강도의 경향과 차이를 보였다. 한편, 수중양생을 실시할 경우, 압축강도-염화물 확산계수와 공극률-염화물 확산계수의 상관성은 우수하였으나, 가혹 조건에서 양생한 경우, 수중 양생을 실시한 경우와 비교하여 크게 감소하였다. 이에 비해, 양생 조건과 관계없이 평균 공극 직경과 염화물 확산계수는 상관관계가 크지 않은 것으로 나타났다.

Abstract ▼ AI-Helper

In this paper, the compressive strength, pore characteristics, and chloride diffusion coefficient were measured at 28 days of age in order to examine the influence of curing conditions for the chloride diffusion and pores in concrete cured under extreme condition. According to the test results, the compressive strength was improved as the relative humidity increased. Additionally, higher compressive strength was observed when the specimens were cured at 35℃. However, the compressive strength of specimens cured at 45℃ was decreased. Meanwhile, the chloride diffusion coefficient decreased with an increase in curing temperature and relative humidity, indicating a difference compared to the trend observed for compressive strength. On the other hand, the excellent correlation showed between compressive strength and chloride diffusion coefficient, porosity and chloride diffusion coefficient when the concrete cured under water. However, when the concrete cured under extreme condition, this correlation was significantly reduced compared to the water curing case. In contrast, it has been determined that there is no significant correlation between the average pore size and chloride diffusion coefficient, regardless of the curing conditions.

Keyword

표/그림 (11)

그림 Fig. 1 Instrument used to measure the pore structure
그림 Fig. 2 Arrangement of the migration set-up (NT Build 492)
표 Table 1 Concrete mix proportions
그림 Fig. 3 Pore distributions (micro)
그림 Fig. 4 Porosity
그림 Fig. 5 Average pore size
그림 Fig. 6 Results of compressive strength test
그림 Fig. 7 Chloride diffusion coefficients
그림 Fig. 8 Correlation between compressive strength and diffusion coefficient
그림 Fig. 9 Correlation between porosity and diffusion coefficient
그림 Fig. 10 Correlation between average pore size and diffusion coefficient

참고문헌 (25)

Bazant, Z. P., and Prat, P. C. (1988). Effect of temperature and humidity on fracture energy, ACI Materials Journal, 85(4), 262-271.？
Choi, Y. S., Won, M. S., Yi, S. T., and Yang, E. I. (2012), Characteristics of Pore Structure and Chloride Penetration Resistance of Concrete Exposed to Freezing-Thawing, Journal of the Korea Institute for Structural Maintenance and Inspection, 16(6), 73-81 (in Korean).？
Choi, S. Y., Kim, S. W., Kim, I. S., and Yang, E. I. (2023), Effect of Extracted Tempered Glass from End-of-Life Solar Panels on Mechanical Properties of Mortar, Journal of the Korea Institute for Structural Maintenance and Inspection, 27(2), 77-85 (in Korean).？
Fujibe, F. (2002). Long-term humidity change on hot days in the central part of Tokyo, Tenki, 49(6), 473-476.？
Ishida, T., Maekawa, K., and Kishi, T. (2007) Enhanced modeling of moisture equilibrium and transport in cementitious materials under arbitrary temperature and relative humidity history, Cement and Concrete Research, 37(4), 565-578.？

상세보기
Kim, C. H., and Kim, N. W. (2016), Mechanical Property of Fiber Reinforced Concrete according to the Change of Curing Method, Journal of the Korea Institute for Structural Maintenance and Inspection, 20(2), 67-73 (in Korean).？
Kim, R. H., Kim, G. Y., Lee, B. K., Shin, K. S., and Song, G. Y (2015), Effects of Micropores on the Freezing-Thawing Resistance of High Volume Slag Concrete, Journal of the Korea Institute for Structural Maintenance and Inspection, 19(4), 67-75 (in Korean).？
Kim, T. K., Shin, J. H., Shin, D. W., Shim, H. B., and Kim, J. H. (2014), Performance Based Evaluation of Concrete Material Properties from Climate Change Effect on Temperature and Humidity Curing Conditions, Journal of the Korea Institute for Structural Maintenance and Inspection, 18(6), 114-122 (in Korean).？
Kim, T. S., Jung, S. H., Choi, Y C., and Song, H. W. (2009), An Experimental Study on Relation between Chloride Diffusivity and Microstructural Characteristics for GGBS Concrete, Journal of the Korea Concrete Institute, 21(5), 639-647 (in Korean).？
Kim, N. W., Yeo, D. G., Song, J. H., and Bae, J. S. (2007), A Study on the Characteristic of Capillary Pore and Chloride Diffusivity by Electrical Difference of High-Strength Concrete Using Metakaolin, Journal of the Korea Concrete Institute, 19(4), 499-506 (in Korean).？
Korean Construction Specification (2022), Ordinary Concrete (KCS 14 20 10), Korea Construction Standard Center, Seoul (in Korean).？
Korean Construction Specification (2022), Formwork and Shores (KCS 14 20 12), Korea Construction Standard Center, Seoul (in Korean).？
Mangat, P. S., and Molly, B. T. (1994) Prediction of free chloride concentration in concrete using routine inspection data, Magazine of Concrete Research, 46(169), 279-287.？

상세보기
Mehta, P. K., and Monteiro, P. J. (2014), Concrete: microstructure, properties, and materials. McGraw-Hill Education, 26-38.？
Mindess, S., Young, F. J., and Darwin, D. (2003), Concrete 2nd edition. Prentice Hall, 57-90.？
Moon, H. Y., Kim H. S., and Choi, D. S. (2003), The Characteristic of Capillary Pore and Chloride Diffusivity by Electrical Difference into Various Concrete, Journal of the Korean Society of Civil Engineers, 23(5A), 969-976 (in Korean).？
Moon, H. Y., Kim H. S., and Choi, D. S. (2006), Relationship between average pore diameter and chloride diffusivity in various concretes, Construction and Building Materials, 20(9), 725-732？

상세보기
NT BUILD 492 (1999), Concrete, Mortar and Cement-Based Repair Materials: Chloride Migration Coefficient from Non-Steady State Migration Experiments, Nordtest, 1-8.？
Park, S. S., Kwon, S. J., and Kim, T. S. (2009), An Experimental Study on the Durability Characterization using Porosity, Journal of the Korean Society of Civil Engineers, 29(2A), 171-179 (in Korean).？
Park, M. H., Lee, J. S., Suh, Y. S., Han, I. S., Bae, H. G., and Kim, H. D. (2013), Long-term Relative Humidity Changes on High Temperature Days of Major Cities in Korea for the Recent 37 Years, Journal of Environmental Science International, 22(12), 1671-1681 (in Korean).？
Song, H. W., Kwon, S. J., Byun, K. J., and Park, C. K. (2005), A Study on Analytical Technique of Chloride Diffusion considering Characteristics of Mixtrue Design for High Performance Concrete using Mineral Admixture, Journal of the Korean Society of Civil Engineers, 25(1A), 213-223 (in Korean).？
Tang, L., and Nilsson, L. O. (1992), A study of the quantitative relationship between permeability and pore size distribution of hardened cement pastes, Cement and Concrete Research, 22(4), 541-550.？

상세보기
Tang, L., and Nilsson, L. O. (1993), Chloride binding capacity and binding isotherms of OPC paste and mortar, Cement and Concrete Research, 23(2), 347-353.？
Won, M. S. (2012), Characteristics of Pore Structures and Chloride Penetration Resistance for Concrete exposed to Freezing-Thawing, (Masters dissertation), Gangneung-Wonju National University, Gangneung, Korea.？
Yang, S. J. (2023), Performance Evaluation and Service Life Prediction of Concrete Structures Exposed to Chloride Penetration Damage with Various Temperature and Humidity Conditions (Masters dissertation), Yonsei University, Seoul, Korea.

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