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Steel-concrete interface influence on chloride threshold for corrosion – Empirical reinforcement to theory
https://orcid.org/0000-0002-2223-8218
Highlights Steel-concrete distance in void correlate with chloride threshold. Voids on steel surface explain chloride threshold variability. Results agree with theory of localized corrosion.
Abstract Reinforcement corrosion is a common cause for reinforced concrete structure deterioration. One of the main causes for reinforcement corrosion is chloride ingress to the concrete. Published work hint at a relationship between susceptibility to chloride induced corrosion and the interface between the concrete and the rebar, known as the steel–concrete interface (SCI). This paper presents an investigation of the relationship between the chloride threshold for chloride-induced corrosion and the properties of the SCI around embedded rebar. The relationship was investigated using 16 different concrete mixes. SCI properties were extracted using automated image analysis. The chloride threshold was found to decrease with the distance between the rebar surface and the concrete solids. In the case of horizontal rebar, the chloride threshold decreased with SCI thickness as well. These results agree with the theory of concentration polarization in localized corrosion and may explain the variety of chloride threshold values reported in the literature.
Steel-concrete interface influence on chloride threshold for corrosion – Empirical reinforcement to theory
https://orcid.org/0000-0002-2223-8218
Highlights Steel-concrete distance in void correlate with chloride threshold. Voids on steel surface explain chloride threshold variability. Results agree with theory of localized corrosion.
Abstract Reinforcement corrosion is a common cause for reinforced concrete structure deterioration. One of the main causes for reinforcement corrosion is chloride ingress to the concrete. Published work hint at a relationship between susceptibility to chloride induced corrosion and the interface between the concrete and the rebar, known as the steel–concrete interface (SCI). This paper presents an investigation of the relationship between the chloride threshold for chloride-induced corrosion and the properties of the SCI around embedded rebar. The relationship was investigated using 16 different concrete mixes. SCI properties were extracted using automated image analysis. The chloride threshold was found to decrease with the distance between the rebar surface and the concrete solids. In the case of horizontal rebar, the chloride threshold decreased with SCI thickness as well. These results agree with the theory of concentration polarization in localized corrosion and may explain the variety of chloride threshold values reported in the literature.
Steel-concrete interface influence on chloride threshold for corrosion – Empirical reinforcement to theory
https://orcid.org/0000-0002-2223-8218
Highlights Steel-concrete distance in void correlate with chloride threshold. Voids on steel surface explain chloride threshold variability. Results agree with theory of localized corrosion.
Abstract Reinforcement corrosion is a common cause for reinforced concrete structure deterioration. One of the main causes for reinforcement corrosion is chloride ingress to the concrete. Published work hint at a relationship between susceptibility to chloride induced corrosion and the interface between the concrete and the rebar, known as the steel–concrete interface (SCI). This paper presents an investigation of the relationship between the chloride threshold for chloride-induced corrosion and the properties of the SCI around embedded rebar. The relationship was investigated using 16 different concrete mixes. SCI properties were extracted using automated image analysis. The chloride threshold was found to decrease with the distance between the rebar surface and the concrete solids. In the case of horizontal rebar, the chloride threshold decreased with SCI thickness as well. These results agree with the theory of concentration polarization in localized corrosion and may explain the variety of chloride threshold values reported in the literature.
Steel-concrete interface influence on chloride threshold for corrosion – Empirical reinforcement to theory
Kenny, Amit (author) / Katz, Amnon (author)
2020-02-06
Article (Journal)
Electronic Resource
English
BSE , back scattered electron microscopy , CCCL , chloride corrosion concentration limit, or chloride threshold , EIS , electrochemical impedance spectroscopy , HRWR , high range water reducer , RC , reinforced concrete , SCI , steel-concrete interface , Concrete , Chloride threshold , Rebar , Steel , Corrosion , Steel-concrete interface
Chloride Threshold for Corrosion of Reinforcement in Concrete
| Online Contents | 1996
Chloride Threshold for Corrosion of Reinforcement in Concrete
| British Library Online Contents | 1996
Factors Affecting Threshold Chloride for Reinforcement Corrosion in Concrete
| British Library Online Contents | 1995