Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
권호 표지
DOI QR코드

DOI QR Code

Anti-Corrosion Property of Geopolymer Evaluated by an Impressed Current Cathodic Protection Method, Exposed to Marine Environment

염해환경에서 외부전원법에 의한 지오폴리머 시험체 보강철근의 방식특성 평가

  • Lee, Hae-Seung (Department of Architecture and Ocean Space, College of Ocean Science and Technology, Korea and Ocean University) ;
  • Cho, Ggu-Hwan (Department of Architecture and Ocean Space, College of Ocean Science and Technology, Korea and Ocean University) ;
  • Park, Dong-Cheon (Department of Architecture and Ocean Space, College of Ocean Science and Technology, Korea and Ocean University)
  • Received : 2014.07.08
  • Accepted : 2014.08.28
  • Published : 2014.10.20
Download PDF
⟨ Previous Next ⟩

Abstract

There are many literatures reporting that the service life of re-bars in concrete structures is reduced in the oceanic environment due to chloride attack. To solve this problem, this study used geo-polymer as a mix material for concrete to increase its resistance to salt damage, and the external voltage method, one of the electric methods, is was applied to evaluate the likelihood of re-bars in the oceanic structure being exposed to the extreme salt environment. The items evaluated include the natural potential of re-bars and the corrosion rate. The results of the tests showed that in all of the salt environmental conditions (submerged zone, tidal zone, and crack), the tested materials were remarkably effective compared with ordinary concrete. The corrosion protective property was found not only in the evaluation of the natural potential but also in the evaluation of the corrosion rate, suggesting that the external voltage method can be used stably for geo-polymer RC structures in an extreme salt environment.

극한 염해환경에서 철근보강 지오폴리머 시험체의 외부전원법 전기방식 특성을 평가를 위하여 일련의 촉진실험을 실시하였다. 동시에 같은 조건의 보통 시멘트 콘크리트도 제조하여 비교 검토하였다. 환경조건은 침지대, 간만대, 그리고 크랙을 상정하였다. 지오폴리머는 밀실한 재료적 특성에 기인한 열화인자 침투 저항 증대에 의해 자연전위 뿐만 아니라 촉진 종료 후의 부식면적에서도 상당히 우수한 방식 성능이 있는 것으로 밝혀졌으며 향후 제작 양생 등의 문제를 개선함으로써 해양구조물로써의 활용이 다양해질 것으로 기대된다.

Keywords

References

  1. Kim SS. Study on the Deterioration of Concrete and the Corrosion and Protection of Reinforcing Steel in Concrete under the Seawater Environment [master's thesis]. [Seoul Korea]: Hanyang University; 1994. 175 p.
  2. Moon HY, Kim SS, Kim SH. Effect of Impressed Current System for Corrosion Protection of Rebars in Concrete. Journal of the Korea Concrete Institute. 1999 October 31;11(2):221-30.
  3. Lee JH, Lee JB, Kim SS, Uhm SH. Furnace Slag and Fly Ash in Concrete Utilizing Study on Salt Resistance. Journal of Korea Recycled Construction Resource Institute. 2013 November 30;13(22):164-6.
  4. Sin KS, Kim GY, Lee BG, Cho BS, Lee HH. Evaluation on the Salt damage Resistance of Concrete using Blast-furnace Slag. Journal of Korea Recycled Construction Resource Institute. 2012 November 30;12(2):44-6.
  5. Song JK, Yang JH. Trends of Geopolymer Concrete Development. Journal of Architectural Institute of Korea. 2010 February 18;54(2):26-9.
  6. Lee KP, Do YS, Lee SS, Song HY. A Study on Optimum Mixing Derivation of the Environment-Friendly High Performance Geopolymer Paste. Journal of The Korea Institute of Building Construction. 2009 November;9(2):107-11.
  7. Lee SG. The Study on the Anti-Corrosive Methods of Reinforced Concrete Exposed to Salt damage Environment [master's thesis]. [Seoul Korea]: Chung-Ang University; 2002. 68 p.
  8. Moon HS. Research of Corrosion Protection System for Reinforced Concrete Steel Exposed to Chloride Environments [master's thesis]. [Seoul Korea]: Chung-Ang University; 2001. 73 p.
  9. Kim EG, Sin CB, Cho WI, Lee YH. An Experimental Study on the Transport of Chloride Ions and the Corrosion of Reinforcing Steel in Coastal Concrete Structures. Journal of Korean Society of Civil Engineers. 1998 July 31;18(1-4):447-55.
  10. LEE GS, Chloride Attack Protection Cases of Reinforced Concrete Structures in Foreign Countries. Journal of the Korea Institute for Structural Maintenance Inspection. 2000 July 31;4(3):30-8.
  11. Bennet J, Turk T. Criteria for the Cathodic Protection of Reinforced Concrete Bridge Elements. SHRP-S-359, SHRP, US. 1994; 3-14.
  12. Jung JA. Corrosion and Cathodic Protection Monitoring of Reinforced Concrete Structure [Doctorate thesis]. [Busan Korea]: Busan University; 2013. 162 p.
  13. Kwon TS. Effects of Alkali-Activatiors on Compressive Strength of Blast Furnace Slag Concrete [master's thesis]. [Seoul Korea]: HanYang University; 2002. 51 p.
  14. LEE JG, Choo YS, Jung SJ. Status and Prospect of Geopolymer. The Korean Journal of Ceramics. 2006 June 30;9(3):44-9.
  15. Kim CM. A Study on the Ways of Practically using Geopolymer Concrete [master's thesis]. [Jeon Nam Korea]: Jeon Nam University; 2009. 45 p.
  16. Song JG, Yang GH, Kim GW, Kim BJ. Properties of Sodium Alkali-Activated Ground Granulated Blast-Furnace Slag(GGBS) Mortar. Journal of Architectural Institute of Korea. 2010 June 30;26(6):61-8.
  17. Choi DS. Characteristics of Chloride Ion Diffusion in Concrete Containing GGBS [master's thesis]. [Seoul Korea]: Hang Yang Univsity; 2001. 56 p.
  18. Choi SS. The Property of Chloride Ion Migration in Concrete According to Method of Fly-Ash Mixtures [master's thesis]. [Busan Korea]: Dong-Eui University; 2012. 82 p.