Issue |
MATEC Web Conf.
Volume 199, 2018
International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2018)
|
|
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Article Number | 05004 | |
Number of page(s) | 8 | |
Section | Reinforcement Corrosion Prevention and Cathodic Protection | |
DOI | https://doi.org/10.1051/matecconf/201819905004 | |
Published online | 31 October 2018 |
A 5 year track record on a galvanic CP system applied on a light weight concrete bridge with prestressed steel – Developments in time of the effectiveness as determined by depolarisation values and current densities
1
Vogel Cathodic Protection, Zwijndrecht, The Netherlands
2
Rijkswaterstaat-GPO, Utrecht, The Netherlands
3
CorrPRE, Moordrecht, The Netherlands
4
Cathodic Protection Advice, Capelle aan den IJssel, The Netherlands
* Corresponding author: hansvandenhondel@icloud.com & hvdhondel@mourik.com
This paper gives insight in the research and investigations which were undertaken on a post tensioned light-weight concrete box girder bridge in the Netherlands. This project started in the first half of 2013 and measurements are still executed regularly. Due to long-term leakage of a longitudinal joint between 2 parts of the bridge, chlorides had penetrated into the concrete up to the level of the reinforcement and beyond, causing severe corrosion of the steel, spalling of the concrete cover and eventually causing danger for the shipping underneath the bridge due to falling lumps of concrete. To solve this problem, Galvanic Cathodic Protection (GCP) was applied in 2 stages. Firstly, in 2013, zinc based anode strips were applied on the soffit of 2 post tensioned lightweight bridge segments for the purpose of testing and monitoring. After obtaining good results from the test, in 2014/2015 the remaining 29 bridge segments were repaired and protected with the same GCP system as well. This paper reviews subsequent potential decay and current densities measurements, which have provided valuable information on GCP performance and throwing power. The results of anode performance at different locations and depths are reviewed. Concrete resistivity have shown a major influence on the effectiveness of the installed GCP system.
© The Authors, published by EDP Sciences, 2018
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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