대한건축학회논문집 (Journal of the Architectural Institute of Korea)

  • 제39권12호
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  • Pages.269-278
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  • 2023
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  • 2733-6239(pISSN)
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  • 2733-6247(eISSN)
대한건축학회 (Architectural Institute of Korea)
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EIS를 활용한 염해에 따른 철근 부식 및 콘크리트 손상 평가

Evaluation of Chloride-Induced Steel Corrosion and Concrete Deterioration Using Electrochemical Impedance Spectroscopy (EIS)

  • 우성엽 (동아대 ICT융합해양스마트시티공학과) ;
  • 김제경 (동아대 해양도시건설.방재연구소(교육부지정 대학중점연구소)) ;
  • 이정재 (동아대 ICT융합해양스마트시티공학과) ;
  • 기성훈 (동아대 ICT융합해양스마트시티공학과)
  • Woo, Seong-Yeop (Dept. of ICT Intergrated Ocean Smartcity Engineering, Dong-a University) ;
  • Kim, Je-Kyung (National Research Centre for Disaster-free and Safety Ocean City Construction, Dong-a University) ;
  • Yee, Jurng-Jae (Dept. of ICT Intergrated Ocean Smartcity Engineering, Dong-a University) ;
  • Kee, Seong-Hoon (Dept. of ICT Intergrated Ocean Smartcity Engineering, Dong-a University)
  • 투고 : 2023.09.25
  • 심사 : 2023.11.09
  • 발행 : 2023.12.31
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, it was utilized Electrochemical Impedance Spectroscopy(EIS) to evaluate the deterioration of concrete caused by the propagation of cracks due to chloride-induced steel corrosion at different corrosion stages. Concrete specimens with a water-to-cement ratio of 0.5 were immersed in a NaCl solution to simulate four corrosion stages(0C, 650C, 1300C, and 2600C) through accelerated corrosion experiments on steel reinforcement. EIS analysis revealed key parameters like charge solution resistance(RS), transfer resistance(RC) and double layer capacitance(Cdl). RS decreased significantly according to occurring concrete cracks. RC value decreased sharply at the onset of corrosion, while Cdl vlaue gradually increased with higher impressed current, reflecting oxygen diffusion rates and crack development. These findings provide insights for signal interpretation methods to monitor concrete degradation due to steel corrosion at various stages. And based on these results, this study had proposed criteria for evaluating steel corrosion and concrete damage conditions.

키워드

과제정보

이 연구는 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업에 의한 결과의 일부임. 과제번호:2016R1A6A1A03012812

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