An Anti-corrosion Method for Concrete Slab with Cathodic Protection
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Bibliographic Details
| Author(s): |
Eri Suzue
(Honshu Shikoku Bridge Expressway Company Limited, Kobe, JPN)
Taku Tsujimoto (Honshu Shikoku Bridge Expressway Company Limited, Kobe, JPN) Keiichi Eguchi (Honshi-Expressway Bridge Engineering Company Limited, Kobe, JPN) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Construction’s Role for a World in Emergency, Manchester, United Kingdom, 10-14 April 2024 | ||||
| Published in: | IABSE Symposium Manchester 2024 | ||||
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| Page(s): | 814-821 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/manchester.2024.0814 | ||||
| Abstract: |
Ohnaruto Bridge is a suspension bridge with a total length of 1,629m and has served for 38 years since opening in 1985. In 2001, flaking prevention work and surface coatings as salt damage countermeasures were carried out. Also, cross-sectional restorations were applied to deteriorated sections of the concrete slab. However, after 10 years of the repair work, in 2011, same deteriorations were observed again. Field investigations revealed that the main cause of the deterioration was macro-cell corrosion at the boundary between the repaired and unrepaired sections of the cross-sectional restoration. Impressed current cathodic protection method was adopted as a result of the verification to avoid the re-degradation and to save life cycle cost. This paper reports field investigations of the cause of the re-degradation, a study on cathodic protection, installation work of the adopted protection method, and its maintenance. |
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| Keywords: |
reinforced concrete cathodic protection life cycle cost Macro-cell corrosion Salt damage countermeasure Impressed current system
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