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http://dx.doi.org/10.14346/JKOSOS.2014.29.6.087

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

Chung, Jee-Seung (Department of Railroad Civil Engineering, Dongyang University)
Kim, Bo-Heon (Korea Infrastructure Safety Corporation)
Kim, Il-Sun (Korea Infrastructure Safety Corporation)
Publication Information
Journal of the Korean Society of Safety / v.29, no.6, 2014 , pp. 87-93 More about this Journal
Abstract
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.
Keywords
end zone of concret deck; chloride attack; chloride content test; condition evaluation standard; repairs of degraded parts;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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