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Prediction of Time to Corrosion for Concrete Bridge Decks Exposed to De-Icing Chemicals
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 Title & Authors
Prediction of Time to Corrosion for Concrete Bridge Decks Exposed to De-Icing Chemicals
Lee, Chang-Soo; Yoon, In-Seok; Park, Jong-Hyok;
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 Abstract
The major cause of deterioration for the concrete bridge decks exposed to de-icing chemicals would be chloride-induced reinforcement corrosion. Thus, in this paper, in order to predict time to corrosion for concrete bridge decks in the urban area, chloride concentration was measured with depth from the surface. A frequency analysis on surface chloride concentration and chloride diffusion coefficient of concrete bridge deck equals 0.192, 29.828 in the scale parameter and 7.899, 1.983 in the shape parameter of gamma distribution. The average value of surface chloride concentration equals 1.5 kg/㎥ and condenses from 1 to 2 kg/㎥ in the level of probability 70%. From the probabilistic results, it is confirmed that 26mm of minimum cover depth in order to target 20 years over is calculated. The countermeasure strategy to extend the service life of concrete bridge deck exposed to de-icing chemicals would be an effective method to increase cover depth and to place high performance concrete, which could lead to reduce the chloride diffusion coefficient and distribution range.
 Keywords
de-icing chemicals;concrete bridge deck;service life prediction;surface chloride concentration;chloride diffusion coefficient;
 Language
Korean
 Cited by
1.
중성화와 염해를 고려한 콘크리트의 복합열화 예측,이창수;윤인석;

한국콘크리트학회논문집, 2003. vol.15. 6, pp.902-912 crossref(new window)
2.
동절기 제설제 사용에 대한 고속도로 교량의 내구수명 평가,;;;;;

한국재난정보학회 논문집, 2015. vol.11. 4, pp.548-555 crossref(new window)
1.
Estimation of Service Life for Expressway Bridge Subjected to Chloride Ingress from De-icer, Journal of The Korean Society of Disaster Information, 2015, 11, 4, 548  crossref(new windwow)
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