Performance evaluation of galvanic anodes through laboratory testing and on-site monitoring

Author(s): W. Dodds, C. Christodoulou, C.I. Goodier, S.A. Austin
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
ISBN: 978-2-35158-135-3
e-ISBN: 978-2-35158-136-0
Pages: 175 - 182
Total Pages: 8
Language: English

Abstract: 
This study examines the effectiveness of galvanic anodes installed both within the patch repair and surrounding parent concrete through laboratory testing and on-site monitoring. Sodium chloride was added during casting of the laboratory concrete specimens to induce corrosion. The anodes were tested using surface potential mapping at 7 days, 8 months and also 26 months after repair. Site monitoring of galvanic anodes was performed over a period of 215 days. The results showed that galvanic anodes installed in the parent concrete had a greater polarisation effect on the surrounding steel, which is generally considered to be at highest risk, as compared to galvanic anodes installed within the patch repair itself. This was in-line with data obtained from similar installations in full-scale reinforced concrete structures. It was also noted that, with increasing chloride content, the polarisation extent was reduced.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00