염해환경에서 외부전원법에 의한 지오폴리머 시험체 보강철근의 방식특성 평가 = Anti-Corrosion Property of Geopolymer Evaluated by an Impressed Current Cathodic Protection Method, Exposed to Marine Environment

다국어 초록 (Multilingual Abstract)

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

국문 초록 (Abstract)

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

참고문헌 (Reference)

• 1 송진규, "고로슬래그와 나트륨계열 활성화제를 이용한 무시멘트 모르타르의 특성" 대한건축학회 26 (26): 61-68, 2010
• 2 이주현, "고로슬래그 미분말과 플라이애시를 활용한 콘크리트의 염해 저항성에 관한 연구" 한국건설순환자원학회 13 (13): 164-166, 2013
• 3 Song JK, "Trends of Geopolymer Concrete Development" 54 (54): 26-29, 2010
• 4 Lee SG, "The Study on the Anti-Corrosive Methods of Reinforced Concrete Exposed to Salt damage Environment" Chung-Ang University 2002
• 5 Choi SS, "The Property of Chloride Ion Migration in Concrete According to Method of Fly-Ash Mixtures" Dong-Eui University 2012
• 6 Kim SS, "Study on the Deterioration of Concrete and the Corrosion and Protection of Reinforcing Steel in Concrete under the Seawater Environment" Hanyang University 1994
• 7 LEE JG, "Status and Prospect of Geopolymer" 9 (9): 44-49, 2006
• 8 Moon HS, "Research of Corrosion Protection System for Reinforced Concrete Steel Exposed to Chloride Environments" Chung-Ang University 2001
• 9 Sin KS, "Evaluation on the Salt damage Resistance of Concrete using Blast-furnace Slag" 12 (12): 44-46, 2012
• 10 Kwon TS, "Effects of Alkali-Activatiors on Compressive Strength of Blast Furnace Slag Concrete" HanYang University 2002
• 11 Moon HY, "Effect of Impressed Current System for Corrosion Protection of Rebars in Concrete" 11 (11): 221-230, 1999
• 12 Bennet J, "Criteria for the Cathodic Protection of Reinforced Concrete Bridge Elements" SHRP 3-14, 1994
• 13 Jung JA, "Corrosion and Cathodic Protection Monitoring of Reinforced Concrete Structure" Busan University 2013
• 14 LEE GS, "Chloride Attack Protection Cases of Reinforced Concrete Structures in Foreign Countries" 4 (4): 30-38, 2000
• 15 Choi DS, "Characteristics of Chloride Ion Diffusion in Concrete Containing GGBS" Hang Yang Univsity 2001
• 16 Kim EG, "An Experimental Study on the Transport of Chloride Ions and the Corrosion of Reinforcing Steel in Coastal Concrete Structures" 18 (18): 447-455, 1998
• 17 Kim CM, "A Study on the Ways of Practically using Geopolymer Concrete" Jeon Nam University 2009
• 18 Lee KP, "A Study on Optimum Mixing Derivation of the Environment-Friendly High Performance Geopolymer Paste" Journal of The Korea Institute of Building Construction 9 (9): 107-111, 2009