Evaluation of chloride-ingress models on concrete bridge exposed to deicing salts (CROSBI ID 705516)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Kušter Marić, Marija ; Ožbolt, Joško ; Balabanić, Gojko ; Pavlica, Ivona
engleski
Evaluation of chloride-ingress models on concrete bridge exposed to deicing salts
Numerical models for chloride transport in concrete have been improved in the last four decades, however, their application to existing structures is still not at a satisfactory level. While simple models have many limitations that cannot be applied to existing structures in a real environment, more comprehensive models for service life prediction are not suitable for everyday engineering practice. Two chloride ingress models, a more comprehensive 3D chemo- hygro-thermo mechanical (CHTM) model implemented into the MASA software and well-known Life-365, are used for a case study: motorway bridge in the mountain region in Croatia. Both models are capable to predict the chloride content in concrete and match well with measured data on the bridge after 11 and 14 years of exposure to deicing salts. However, calibration with measured results led to higher values of surface chloride content and initial chloride diffusion coefficient for numerical analyses using the Life-365, which assumes that the concrete is uncracked and the surface chloride content is constant. On the other hand, the 3D CHTM model considers more realistic conditions: variable temperature, surface water and chloride contents, wetting and drying cycles, chloride diffusion and convection in cracked and un-cracked concrete. Consequently, input values for chloride diffusivity and surface chloride content do not require calibration for each chloride profile, as is the case for the Life-365 application.
chloride diffusion, numerical model, concrete bridge, wetting-draying cycles, crack, numerical analysis, chloride content, de-icing salts.
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Podaci o prilogu
10046
2021.
objavljeno
10.3390/CMDWC2021-10046
Podaci o matičnoj publikaciji
1st Corrosion and Materials Degradation Web Conference session: Corrosion in Concrete and Porous Media
Singh, Raman ; Macdonald, Digby ; Jones, Rhys
Basel: MDPI Books
Podaci o skupu
1st Corrosion and Materials Degradation Conference (CMDWC 2021)
predavanje
17.05.2021-19.05.2021
Basel, Švicarska