In concrete structures subjected to a source of chlorides such as coastal structures or roads treated with de-icing salts, corrosion will appear in due time, compromising the structural reliability of the structure. In order to prevent the deterioration of the structure from reaching a critical level, a preventive maintenance intervention may be applied. However deciding whether to execute a particular intervention requires accurate prediction of chloride ingress into concrete, both with and without the repair intervention.
While analytical models have been developed to predict chloride ingress in one-dimensional situations, there is a lack of analytical models for more complex geometries where two-dimensional effects are significant. In this work, an approximate model will be developed to quantify the chloride ingress in a 2D cross-section before and after an intervention. The repair interventions considered include the application of a coating, a mortar overlay, or partial cover replacement. The results of the analytical model will be compared with those from a numerical approach where the chloride ingress is predicted in a more accurate way, but is much more computationally expensive. Finally, the benefits and drawbacks of both the analytical and numerical approaches will be discussed.