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A Study on Chloride Attack Resistibility of Quaternary Concrete

4성분계 콘크리트의 염해 저항성능에 관한 연구

  • Received : 2013.09.30
  • Accepted : 2014.01.09
  • Published : 2014.02.28

Abstract

The purpose of this study is to estimate Chloride Attack Resistibility and mechanical properties of quaternary concrete adding fly ash, blast-furnace slag, and silica fume. Compressive strength, modulus of elasticity, chloride migration coefficient, charge passed from Rapid chloride penetration test(RCPT), and immersion testing in 3% NaCl are tested. Chloride migration coefficient and charge passed of quaternary concrete measured $0.032{\times}10^{-12}m^2/sec$ and 650 coulomb at 17 weeks, which are in a permitted limit. Also in immersion test, depth of chloride penetration and maximum chloride ion of quaternary concrete measured 3.7 mm and $10.211kg/m^3$ respectively. From the results, quaternary concrete adding fly ash, blast-furnace slag, and silica fume denotes improvement of mechanical properties and chloride attack resistibility.

본 연구의 목적은 플라이 애시, 고로슬래그 미분말, 실리카흄을 사용하여 4성분계 콘크리트의 염해 저항성능을 평가하기 위한 것이다. 본 연구에서는 압축강도, 탄성계수, 염수침지 시험, 염화물 확산계수 및 침투계수를 실시하였다. 4성분계 콘크리트의 염화물 확산계수와 침투계수는 재령 17주에 $0.032{\times}10^{-12}m^2/sec$와 650 coulomb으로 측정되었다. 또한 침지시험 결과 염화물 이온 침투깊이와 염화물량은 3.7 mm and $10.211kg/m^3$로 측정 되었다. 이러한 결과로부터 플라이 애시, 고로슬래그 미분말, 실리카흄을 사용하여 제조한 4성분계 콘크리트는 염해 저항성능과 역학적 특성이 매우 높을 것을 알 수 있었다.

Keywords

References

  1. Brown, P. W. and Doerr, A., "Chemical Changes in Concrete Due to the INgress of Chemical Species," Cement and Concrete Research, Vol. 30, 2000, pp.411-418. DOI: http://dx.doi.org/10.1016/S0008-8846(99)00266-5
  2. O. S. B. Al-Amoudi, M. Maslehuddin. The Effect of Chloride and Sulfate Ion on Reinforcement Corrosion. Cement and Concrete Research. 1993 Jan;23(1):139-146. DOI: http://dx.doi.org/10.1016/0008-8846(93)90144-X
  3. ACI Committee 222. Corrosion of Metal in Concrete. ACI Manual of Concrete Practice. Part 1. 2012.
  4. M.D.A Thomas, "Use of ternary cementitious systems containing silica fume and fly ash in concrete", Cement and Concrete Research 29, 1999, pp.1207-1214 DOI: http://dx.doi.org/10.1016/S0008-8846(99)00096-4
  5. Jong-Man Shin, A Study on the Chloride Ion Migration Coefficient of Concrete by Using Rapid Chloride Penetration Test, Dept. of Architectural Engineering, Graduate School, Dong Eui University, 2010
  6. M. P. Luxan, F. Madruga, J. Saavedra, Rapid Evaluation Pozzolanic Activity of Natural Products by Conductivity Measurement. Cement and Concrete Research. 1989 Jan;19(1):63-68. DOI: http://dx.doi.org/10.1016/0008-8846(89)90066-5
  7. Kim YS, Lee DW. A Study on the Steel Corrosion Properties of the Concrete Containing Wasted Tile Powder. Journal of the Architectural Institute of Korea. 2010 Jan;26(1):105-8.
  8. W. A. Rasheeduzzafar, "Sulfate Resistance and Chloride Penetration Characteristics of High-Strength Concrete", SP-149, ACI, Detroit, 1994, pp.123-129.