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염화칼슘이 함유된 제설제로 인한 콘크리트 바닥판 단부의 염해에 관한 사례 연구

A Case Study on Chloride Corrosion for the End Zone of Concrete Deck Subjected to De-icing Salts Added Calcium Chloride

  • 정지승 (동양대학교 철도토목학과) ;
  • 김보헌 (한국시설안전공단 시설안전본부) ;
  • 김일순 (한국시설안전공단 시설안전본부)
  • Chung, Jee-Seung (Department of Railroad Civil Engineering, Dongyang University) ;
  • Kim, Bo-Heon (Korea Infrastructure Safety Corporation) ;
  • Kim, Il-Sun (Korea Infrastructure Safety Corporation)
  • 투고 : 2014.07.11
  • 심사 : 2014.12.15
  • 발행 : 2014.12.31

초록

In this study, the reinforced concrete rahmen bridge damaged by the chloride attack was investigated. According to the investigation, the degraded concretes on cantilever kerb and end part were intensively observed. Thus, the chloride content test and half-cell method were performed to evaluate the degraded parts. As a result, the contents of chloride on degraded parts were C and D grade. On the other hand, the half-cell potential values of rebar in degraded concrete were measured with the minor corrosion. This rebar corrosion is expected to progressing. Chloride content D grade is due to expansion pressure by corrosion of rebar and freeze-thaw by permeate water, could see progresses rapidly degradation. In order to prevent chloride attack to concrete deck caused by deicing salts, corresponding to the chloride critical concentration must maintain grade b or at least grade c. Chloride condition evaluation standard apply to evaluation of marine structure chloride attack with chloride attack by deicing salts.

키워드

참고문헌

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피인용 문헌

  1. A Study on the Durability Improvement of Highway-Subsidiary Concrete Structure Exposed to Deicing Salt and Freeze-Thaw vol.20, pp.4, 2016, https://doi.org/10.11112/jksmi.2016.20.4.128
  2. Engineering Characteristics of Cemented Sand with Microorganism Using Eggshell as Calcium Source vol.32, pp.5, 2016, https://doi.org/10.7843/kgs.2016.32.5.5
  3. Sustainable Biocement Production via Microbially Induced Calcium Carbonate Precipitation: Use of Limestone and Acetic Acid Derived from Pyrolysis of Lignocellulosic Biomass vol.5, pp.6, 2017, https://doi.org/10.1021/acssuschemeng.7b00521
  4. Biocementation for Sand Using an Eggshell as Calcium Source vol.142, pp.10, 2016, https://doi.org/10.1061/(ASCE)GT.1943-5606.0001534
  5. Development of a Proactive Anti-Icing System for Driving Zones at Risk During Winter vol.20, pp.5, 2018, https://doi.org/10.7855/IJHE.2018.20.5.113