posted on 2014-07-23, 08:31authored byWayne Dodds, Christian Christodoulou, Chris GoodierChris Goodier, Simon Austin
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.
History
School
Architecture, Building and Civil Engineering
Published in
RILEM International workshop on performance-based specification and control of concrete durability, RILEM PRO 89
Pages
175 - 182
Citation
DODDS, W. ... et al, 2014. Performance evaluation of galvanic anodes through laboratory testing and on-site monitoring. IN: Bjegovic, D., Beushausen, H., Serdar, M. (eds). Proceedings of the RILEM International Workshop on Performance-Based Specification and Control of Concrete Durability, Zagreb, Croatia, 11th - 13th June 2014, pp.175-182.