A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Using X-ray microtomography to study the initiation of chloride-induced reinforcement corrosion in cracked concrete
https://orcid.org/0000-0001-6432-5427
Highlights X-ray tomography was used to study chloride-induced corrosion in cracked concrete. Crack width mostly influences the time to corrosion initiation. Corrosion is mostly dependent on the number of spray-drying cycles after initiation. Pitting is observed preferentially at defects of the steel-mortar interface.
Abstract Corrosion is the main cause of premature degradation of reinforced concrete structures. In particular, the mechanisms of chloride-induced corrosion in cracked structures are not fully elucidated. The aim of this study is to investigate by X-ray tomographic imaging the initiation and propagation of chloride-induced corrosion in cracked concrete. On reinforced prismatic cracked specimens exposed to seawater spray-drying cycles, the approach consists in characterizing in a non-destructive way the crack geometry, corroded steel volume and corrosion products migrating in the cementitious matrix and crack, as a function of time. Sub-volume scans and difference images allow a study of the first stage of chloride-induced corrosion in cracked concrete with respect to the number of spraying cycles, geometry and crack opening. The volume of steel consumed measured by 3D imaging is validated against destructive measurements, and it is shown that insights about the phenomenology of pitting (depth, displacement of corrosion products, densification, crack clogging…) can be obtained.
Using X-ray microtomography to study the initiation of chloride-induced reinforcement corrosion in cracked concrete
https://orcid.org/0000-0001-6432-5427
Highlights X-ray tomography was used to study chloride-induced corrosion in cracked concrete. Crack width mostly influences the time to corrosion initiation. Corrosion is mostly dependent on the number of spray-drying cycles after initiation. Pitting is observed preferentially at defects of the steel-mortar interface.
Abstract Corrosion is the main cause of premature degradation of reinforced concrete structures. In particular, the mechanisms of chloride-induced corrosion in cracked structures are not fully elucidated. The aim of this study is to investigate by X-ray tomographic imaging the initiation and propagation of chloride-induced corrosion in cracked concrete. On reinforced prismatic cracked specimens exposed to seawater spray-drying cycles, the approach consists in characterizing in a non-destructive way the crack geometry, corroded steel volume and corrosion products migrating in the cementitious matrix and crack, as a function of time. Sub-volume scans and difference images allow a study of the first stage of chloride-induced corrosion in cracked concrete with respect to the number of spraying cycles, geometry and crack opening. The volume of steel consumed measured by 3D imaging is validated against destructive measurements, and it is shown that insights about the phenomenology of pitting (depth, displacement of corrosion products, densification, crack clogging…) can be obtained.
Using X-ray microtomography to study the initiation of chloride-induced reinforcement corrosion in cracked concrete
https://orcid.org/0000-0001-6432-5427
Highlights X-ray tomography was used to study chloride-induced corrosion in cracked concrete. Crack width mostly influences the time to corrosion initiation. Corrosion is mostly dependent on the number of spray-drying cycles after initiation. Pitting is observed preferentially at defects of the steel-mortar interface.
Abstract Corrosion is the main cause of premature degradation of reinforced concrete structures. In particular, the mechanisms of chloride-induced corrosion in cracked structures are not fully elucidated. The aim of this study is to investigate by X-ray tomographic imaging the initiation and propagation of chloride-induced corrosion in cracked concrete. On reinforced prismatic cracked specimens exposed to seawater spray-drying cycles, the approach consists in characterizing in a non-destructive way the crack geometry, corroded steel volume and corrosion products migrating in the cementitious matrix and crack, as a function of time. Sub-volume scans and difference images allow a study of the first stage of chloride-induced corrosion in cracked concrete with respect to the number of spraying cycles, geometry and crack opening. The volume of steel consumed measured by 3D imaging is validated against destructive measurements, and it is shown that insights about the phenomenology of pitting (depth, displacement of corrosion products, densification, crack clogging…) can be obtained.
Using X-ray microtomography to study the initiation of chloride-induced reinforcement corrosion in cracked concrete
Bernachy-Barbe, Fabien (author) / Sayari, Takwa (author) / Dewynter-Marty, Véronique (author) / L'Hostis, Valérie (author)
2020-05-13
Article (Journal)
Electronic Resource
English
Initiation Period of Corrosion by Chloride Ion in Cracked Concrete Structures
| Springer Verlag | 2021
Initiation of Chloride-Induced Reinforcement Corrosion in Concrete Structural Members -- Prediction
| Online Contents | 2002