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http://dx.doi.org/10.4334/JKCI.2005.17.6.931

Applicability of Colormetric Method for Estimation of Chloride Penetration in Concrete Structures  

Yang Eun-Ik (Dept. of Civil Engineering, Kangnung National University)
Kim Myung-Yu (Dept. of Civil Engineering, Kangnung National University)
Leem Young-Moon (Dept. of Industrial System Engineering, Kangnung National University)
Park Hae-Geun (Civil Engineering & Technology Team, Samsung Corporation Co.,)
Publication Information
Journal of the Korea Concrete Institute / v.17, no.6, 2005 , pp. 931-938 More about this Journal
Abstract
When concrete structures are exposed under marine condition for a long time, the steel in concrete is corroded due to the ingression of chlorides in the seawater. Because the damages of corrosion resulting from the chloride ion are very serious, many researches have been performed. Silver nitrate colormetric method that can measure easily penetration depth of chloride ion has been executed, recent)y. However, characteristics of silver nitrate colormetric method were not fully examined. Therefore, the objective of this paper Is to study the applicability of colormetric method. For the purpose of this, effect factors and reaction mechanism of colormetric method were investigated, and the colormetric method is applied for marine concrete structures. According to the results of silver nitrate colored method, two reactions such as white reaction of AgCl and brown reaction of AgOH were shown when $AgNO_3$ was sprayed in splited section. And velocity constant ratio(K) of two reactions appeared that white reaction, AgCl reacts with the fast speed by 3240. When the colormetric method was applied in concrete, it is reasonable that $AgNO_3$ solution more than 0.05N concentration was sprayed. It is confirmed that the colormetric method is useful tool for estimating the chloride of concrete structures in situ. The average chloride amount of colored parts indicates $0.9kg/m^3$ per concrete unit weight.
Keywords
corrosion; chloride ion; colormetric method; penetration depth; diffusion coefficient;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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