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Title |
Evaluation of Properties of Reinforced Concrete Exposed to Marine Environment and Corrosion Characteristics of Rebar
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Authors |
서지석(Ji-Seok Seo) ; 이봉춘(Bong-Chun Lee) ; 정상화(Sang-Hwa Jung) |
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DOI |
https://doi.org/10.4334/JKCI.2017.29.6.597 |
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Keywords |
해양환경 ; 부식 ; 염화물확산계수 ; 염해 ; 철근콘크리트 marine environment ; corrosion ; chloride diffusion coefficient ; chloride attack ; reinforced concrete |
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Abstract |
This paper presents the performance of concrete exposed to a marine environment in terms of compressive strength, elastic modulus, chloride penetration, and chloride content. The rebar corrosion characteristic was evaluated according to the standard ASTM G 109. Concrete specimens were prepared in various grades of compressive strength with 40 MPa, 80 MPa, 120 MPa, and 180 MPa. A change of properties was seen for all specimens. Both compressive strength and elastic modulus were slightly better, but the depth of chloride penetration was found to have increased. It was reasonable that all specimens were placed in a marine environment before testing. The chloride content and corrosion potential for only SC40 specimen showed an increase at 0∼10 mm depth of rebar. Also, Fick’s second law model was used to review chloride concentration during 1year exposure time.
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