Probabilistic study of chloride-induced corrosion of carbon steel in concrete structures

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Conference9th ASCE Joint Specialty Conference on Probabilistic Mechanics and Structural Reliability: 26 July 2004, Albuquerque, New Mexico
Pages16; # of pages: 6
SubjectCorrosion (of reinforced concrete)
AbstractThis paper presents an approach for the probabilistic modeling of the chloride-induced corrosion of carbon steel reinforcement in concrete structures that takes into account the uncertainties in the physical models of chloride penetration into concrete and corrosion of carbon steel, as well as the uncertainties in the governing parameters, including concrete diffusivity, concrete cover depth, surface chloride concentration and threshold chloride level for onset of corrosion. The parameters of the models are modeled as random variables and the distribution of the corrosion time and probability of corrosion are determined by using Monte Carlo simulation. The approach is applied to predict the level of corrosion in the top layer of reinforcing carbon steel of a highway bridge deck that was exposed to chlorides from deicing salts for forty years. The statistics of the governing parameters are generated from a detailed field survey using non-destructive evaluation methods. The predictions of the proposed model agree very well with the field data, which illustrates the capability of probabilistic models to characterize the corrosion response of carbon steel and the actual condition of reinforced concrete structures.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47071
NPARC number20378409
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Record identifierfb130681-50e7-4ae8-a59f-4a475748db9f
Record created2012-07-24
Record modified2016-05-09
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