Probabilistic evaluation of time to corrosion initiation in RCelements exposed to chlorides: 2-D modelling

摘要

The paper presents a two-dimensional model for chloride ingress into concrete.rnThe model accounts for two mechanisms which control the chloride ingress – diffusion andrnconvection. Using the model probabilistic evaluation of the time of corrosion initiation in reinforcedrnconcrete (RC) wall (1-D problem) and column (2-D problem) in a marine environmentrnhas been carried out. Results of the analysis show that for the same thickness of the concreterncover the probability of corrosion initiation in the corner reinforcing bars of the RC column isrnmuch higher than in reinforcing bars in the middle part of the RC wall. The results demonstraternthe importance of 2-D modelling for correct prediction of corrosion initiation in such RC elementsrnas columns and beams.