Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

A Method on the Rapid Assessment of Resistance to Chloride Ion Penetration for Mortar and Concrete with Mineral Admixtures

혼화재를 사용한 모르타르 및 콘크리트의 염소이온 침투 저항성 평가

  • Park Jung-Jun (Dept. of Structure Research, Korea Institute of Construction Technology) ;
  • Kim Sung-Wook (Dept. of Structure Research, Korea Institute of Construction Technology) ;
  • Koh Kyung-Taek (Dept. of Structure Research, Korea Institute of Construction Technology) ;
  • Lee Jong-Suk (Dept. of Structure Research, Korea Institute of Construction Technology) ;
  • Lee Jang-Hwa (Dept. of Structure Research, Korea Institute of Construction Technology)
  • 박정준 (한국건설기술연구원 구조연구부) ;
  • 김성욱 (한국건설기술연구원 구조연구부) ;
  • 고경택 (한국건설기술연구원 구조연구부) ;
  • 이종석 (한국건설기술연구원 구조연구부) ;
  • 이장화 (한국건설기술연구원 구조연구부)
  • Published : 2004.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, ASTM C 1202 which is most commonly used for evaluating the penetration resistance into the concrete is reviewed. The test results by ASTM C 1202 showed that the passed charge could be underestimated as the $OH^-$ ion concentration in the concrete is lowered when the concrete is mixed with the admixtures. Therefore, the modified method using the distilled water was proposed in the paper. According to the test results, the modified method is not susceptible to $OH^-$ ion and temperature rise. In addition, the long term emersion test for the concrete mixed with the admixtures in the NaCl solution showed that the chloride diffusion coefficient tested by the modified method have higher correlation compared to the conventional ASTM method.

본 논문에서는 콘크리트의 염소이온에 대한 저항성을 평가하기 위한 대표적인 전기적 촉진시험인 ASTM C 1202 방법을 혼화재를 사용한 콘크리트에 적용하면 콘크리트내의 $OH^-$ 농도의 저하에 따른 영향으로 통과전하량을 낮게 평가할 수 있다는 문제점을 지적하고 이에 해결방안으로 증류수를 사용하는 보정방법을 검토하였다. 실험결과 보정방법 사용시 $OH^-$ 이온과 온도상승에 의한 영향을 배제시킬 수 있었고 NaCl 용액에 장기침지실험을 통해 구한 염화물 확산계수와의 비교시 ASTM C 1202 방법보다 상관성이 높게 나타나 혼화재를 사용한 콘크리트의 염소이온 침투저항성을 보다 정확하게 평가할 수 있는 방법이라 사료된다.

Keywords

References

  1. 박정준, 고경택, 김도겸, 김성욱, 하진규, '혼화재를 혼입한 콘크리트의 염화물 고정화에 관한 실험적 연구', 한국콘크리트학회 가을학술발표회 논문집, 13권 2호, 2001, pp.787~792
  2. 박정준, 김성욱, 이종석, 김도겸, 하진규, '혼화재를 사용한 콘크리트의 염화물 침투 저항성 평가방법에 대한 연구', 2001년도 대한토목학회 정기 학술대회, 2001
  3. 김성욱,박정준, 김도겸, 하진규, '플라이애쉬를 사용한 콘크리트의 염화물 저항성 촉진시험 방법에 관항 검토', 한국구조물진단학회 봄학술발표회 논문집, 6권 1호, 2002, pp.235~238
  4. Caijun Shi, Julia A Stegemann, and Robert J. Caldwell, 'Effect of Supplementary Cementing Materials on the Specific Conductivity of Pore Solution .and its Implications on the Rapid CWoride Permeability Test (MSlITD T277 and AS1M C1202) Results,' ACI Material Journal, Vol.95, No.4, July-August 1998, pp.389~394
  5. Stephanie Charvin, 'Influence of Possolanic Ad -mixtures on Concrete Pore Water pH, CWoride Diffusion and CWoride Binding', A Thesis of Master of science, Florida Atlantic Univ., 1999
  6. 박승범, 김도겸, '콘크리트 중의 염소이온 확산 특성에 관한 실험적 연구', 콘크리트학회 논문집, 12권 1호, 2000, pp.33~44
  7. Nobuaki Otsuki, Makoto Hisada, Takayuki Otani, and Toshio Maruyama, 'Theoretical Evaluation of Diffusion Coefficient of CWoride Ion in Mortar from Mobility,' ACI Material Journal, Vol.96, No.6, 1999, pp.627~633
  8. C. Andrade, 'Calculation of CWoride Diffusi on Coefficients in Concrete from ionic migration measurements,' Cement and Concrete Research, Vol.23, 1993, pp.724~742 https://doi.org/10.1016/0008-8846(93)90023-3
  9. Tang Luping and Lars-Olof Nilsson, 'Rapid IR -termination of the Chloride Diffusivity in Concrete by Applying an Electical Field,' ACI Materials Journal, Vol.89, No.1, 1992. pp.A9~53
  10. Tiewei Zhang and Odd E. Gj$\phi$rv, 'An ElectroChemical Method for Accelerate of testing of Chloride Diffusivity in Concrete,' Cement and Concrete Research, Vol.24, No.8, 1994, pp.1534~1548 https://doi.org/10.1016/0008-8846(94)90168-6
  11. R.K. Dhir, M.R. Jones, H.E.H Ahmed, and A.M.G. Seneviratne, 'Rapid estimation of chloride diffusion coefficient in concrete,' Magazine of Concrete Research, No.152, 1990, pp.177~185
  12. 문한영, 김홍삼, 이승태, 정호섭, 회두선, '콘크리트 중의 염화물 확산평가를 위한 전기화학적 촉진시험법', 한국콘크리트학회 가을학술발표회논문집, 12권 2호, 2000, pp.409~412
  13. ASTM C 1202-97, 'Standard Test Method for Electrical Indication Concrete's Ability to Resist Chloride Ion Penetration,' ASTM, USA, 1997
  14. Roy, D.M, Kumar, A, and Rhodes, J.P., 'Diffusion of Chloride Ions in Hardened Cement Pastes,' Cement and Concrete Research, Vol.11, No.3, 1981, pp.395~400 https://doi.org/10.1016/0008-8846(81)90111-3
  15. 문한영, 김성수, 류재석. '염분환경하에 있는 모르터 및 콘크리트 중의 염분 확산에 대한 연구', 콘크리트학회논문집, 7권 2호, 1995. 3, pp.283~292

Cited by

  1. Experimental Study on Performance of MgO-based Patching Materials for Rapid Repair of Concrete Pavement vol.18, pp.1, 2016, https://doi.org/10.7855/IJHE.2016.18.1.043
  2. Effect of Mineral Admixture on Bond Properties between Polyolefin Based Synthetic Fiber and Cement Mortar vol.23, pp.3, 2011, https://doi.org/10.4334/JKCI.2011.23.3.339