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

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Estimation on the Durability of Metakaolin Concrete According to the W/B Ratio

물결합재비를 달리하여 제작한 메타카올린 혼입 콘크리트의 내구성능 평가

  • 김춘호 (중부대학교 공과대학 토목공학과) ;
  • 김남욱 (전북대학교 공과대학 토목공학과)
  • Received : 2014.05.29
  • Accepted : 2014.06.26
  • Published : 2014.07.30
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Abstract

In this study, in order to find the improvement effect of metakaolin for using improvement of strength in concrete structures, it is investigated the diffusion coefficient of chloride ions and adiabatic temperature rise test. As a result, due to the mixing of metakaolin, it has been confirmed reducing diffusion coefficient of chloride ions and could prevent down of slump for use of adding fly ash. Therefore, ensuring resistance to chloride ion penetration into concrete, it is possible to enlarge the W/B ratio and reduce the adiabatic temperature rise by mixing of metakaolin. So, it is confirmed that the durability of concrete structures is increased.

본 연구에서는 콘크리트 구조물의 강도 향상을 위하여 혼입하고 있는 메타카올린의 내구성능 향상 효과를 규명하기 위하여 염화물이온 확산계수 및 단열온도상승량을 측정하였다. 그 결과, 메타카올린의 혼입으로 인하여 염화물이온 확산계수가 작아짐이 확인되었으며 플라이 애쉬의 첨가를 통하여 유동성의 저하를 억제할 수 있었다. 따라서 염분침투저항성을 확보하면서 물결합재비를 크게 하는 것이 가능하므로 메타카올린의 혼입으로 발생되는 단열온도상승량을 억제할 수 있어 콘크리트의 내구성능이 향상될 수 있음을 확인하였다.

Keywords

References

  1. Kim, C. H., Kim, N. W., and Kim, S. D., (2013), Improvement of Durability in Concrete Structures Using CRM, Journal of the Korea Institute for Structural Maintenance and Inspection, 17(6), 145-152 (in Korean). https://doi.org/10.11112/jksmi.2013.17.6.145
  2. Kim, N. W. (2008), A Study on the Evaluation of Durability of Fiber Reinforced Concrete according to the Change of External Conditions, Journal of the Korean Society of Safety, 23(5), 97-104 (in Korean).
  3. 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 Korean Concrete Institute, 19(4), 499-506 (in Korean). https://doi.org/10.4334/JKCI.2007.19.4.499
  4. Lee, C. S., and Yoon, I. S., (2003), An Experimental Study on the Durability Performance for Ternary Blended Concrete Containing Both Fly Ash and Granulated Blast Furnace Slag, Journal of the Korea Institute for Structural Maintenance and Inspection, 7(1), 145-152 (in Korean).
  5. Moon, H. Y., and Kim, B. K., (2004), Resistance of Chloride Penetration into High Strength Concrete Containing Mineral Admixtures according to Curing Conditions, Journal of the Korea Institute for Structural Maintenance and Inspection, 8(2), 185-194 (in Korean).
  6. Moon, H. Y., Kim, H. S., and, Choi, D. (2003), The Characteristic of Capillary Pore and Chloride Diffusivity by Electrical Difference into Various Concrete, Journal of the Korean Society of Civil Engineers, 23(5-A), 969-976 (in Korean).
  7. Moon, H. Y., Kim, Y. B., and, Moon, D. J., (2005), Mechanical Properties and Resistance to Freezing and Thawing of the Recycled Aggregate Concrete with Metakaolin, Journal of the Korea Institute for Structural Maintenance and Inspection, 9(4), 270-277 (in Korean).
  8. Tang, L. (1992), Electrically Accelerated Methods for Determining Chloride Diffusivity in Concrete-Current Development, Magazine of Concrete Research, 48(176), 173-179.
  9. Tang, L., and Nilsson, O. (1992), Rapid Determination of the Chloride Diffusivity in Concrete by Applying an Electrical Field, American Concrete Institute Materials Journal, 89(49), 46-59.