<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Several inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as they do not cause any or very limited damage to the existing concrete. In this paper, the corrosion state of three reinforced concrete beams exposed to marine environment for 25 years was evaluated by measuring three parameters; electrochemical potential, concrete resistivity and corrosion rate. The measurements were performed with commercial devices. It was found that all devices are applicable for field inspections. Among the methods selected for the study, the electrochemical potential measured in a fine grid and analysed statistically offered the best possibility of evaluating the corrosion state; preferably in combination with selected excavations for determination of the level of corrosion.</p></abstract>

Several inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as they do not cause any or very limited damage to the existing concrete. In this paper, the corrosion state of three reinforced concrete beams exposed to marine environment for 25 years was evaluated by measuring three parameters; electrochemical potential, concrete resistivity and corrosion rate. The measurements were performed with commercial devices. It was found that all devices are applicable for field inspections. Among the methods selected for the study, the electrochemical potential measured in a fine grid and analysed statistically offered the best possibility of evaluating the corrosion state; preferably in combination with selected excavations for determination of the level of corrosion.

Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures

SINTEF Community, Department Architecture, Materials and Structures

Norwegian University of Science and Technology

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Several inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and...

Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures

Published Online: Jul 09, 2020

Page range: 41 - 61

Received: Mar 30, 2020

Accepted: May 28, 2020

DOI: https://doi.org/10.2478/ncr-2019-0005

Keywords
Non-destructive testing, reinforcement corrosion, potential measurement, concrete resistivity, corrosion rate

© 2020 Hornbostel Karla et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures

Published Online: Jul 09, 2020

Page range: 41 - 61

Received: Mar 30, 2020

Accepted: May 28, 2020

DOI: https://doi.org/10.2478/ncr-2019-0005

KeywordsNon-destructive testing, reinforcement corrosion, potential measurement, concrete resistivity, corrosion rate

© 2020 Hornbostel Karla et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Non-destructive testing, reinforcement corrosion, potential measurement, concrete resistivity, corrosion rate