ABSTRACT
Chloride ingress is one of the most important causes of reinforcement corrosion. To assess the risk of chloride-induced corrosion, a frequently used technique is to measure the concrete cover and chloride profile in order to map the chloride ingress process and associated risk for depassivation of the rebars. Based on the results of the analysis, a range of different repair solutions can be proposed, among which a repair mortar applied to the concrete surface to increase the quality and thickness of the concrete cover, such to lower the risk of forthcoming depassivation. Unfortunately, modelling of the migration process of chlorides after such an intervention becomes more complex as two different materials with varying diffusion coefficients are combined. Here, a novel framework is proposed in order to determine the minimal thickness of the repair mortar applied to the surface, ensuring that the probability of depassivation stays below a predefined threshold.
