engleski

Benchmarking chloride ingress models on real-life case studies: Krk bridge and Maslenica bridge

Many chloride ingress models for service life prediction of concrete structures have been developed in the last three decades, but their application in management of existing and design of new bridges is still not on the satisfactory level, due to complexity of transport and corrosion processes, but also due to difficulty in quantifying the material, structural, environmental and corrosion related parameters and their interactions.Two chloride ingress models, recently developed 3D chemo-hygro-thermo mechanical model implemented into finite element code MASA and well-known Life-365, are used for two real life case studies: Maslenica Bridge and Krk Bridges, located in very aggressive maritime environment on the Adriatic coast. Both models are capable to predict the chloride content in concrete after 13 and 20 years of sea exposure with satisfactory accuracy. However, presence of cracks in concrete significantly decreases reinforcement depassivation time. Influence of crack width and depth, but also distance between cracks on chloride ingress in concrete should be considered to predict initiation phase of reinforcement corrosion more realistically.

hloride, numerical model, cracks, case study

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