Corrosion monitoring for underground and submerged concrete structures - examples and interpretation issues
bookPart
Since about 1980 Corrosion Monitoring Systems have been used in many concrete structures in
aggressive environmentworldwide. While these systemswork properly in aboveground environment, some questions
have arisen for submerged conditions, e.g. the outer sides of tunnels, piers in seawater or foundations in wet
soil. One question concerns macro-cell formation between reinforcement in submerged concrete and in nearby
aerated concrete, which might lead to severe corrosion for certain types or configurations of structures (“hollow
leg”). In addition, in some cases, unexpected monitoring signals have been measured in submerged structures.
The interpretation of electrochemical methods for monitoring the corrosion activity is not straightforward and
new criteria have to be developed. This paper reports on an example of corrosion monitoring of an underground
structure, the Green Heart Tunnel in The Netherlands. New criteria for interpretation of underground corrosion
monitoring are proposed.
aggressive environmentworldwide. While these systemswork properly in aboveground environment, some questions
have arisen for submerged conditions, e.g. the outer sides of tunnels, piers in seawater or foundations in wet
soil. One question concerns macro-cell formation between reinforcement in submerged concrete and in nearby
aerated concrete, which might lead to severe corrosion for certain types or configurations of structures (“hollow
leg”). In addition, in some cases, unexpected monitoring signals have been measured in submerged structures.
The interpretation of electrochemical methods for monitoring the corrosion activity is not straightforward and
new criteria have to be developed. This paper reports on an example of corrosion monitoring of an underground
structure, the Green Heart Tunnel in The Netherlands. New criteria for interpretation of underground corrosion
monitoring are proposed.
Topics
TNO Identifier
331465
ISBN
978-0-415-47535-
Publisher
CRC Press
Source title
Tailor Made Concrete Structures: New Solutions for our Society : Proceedings of the International FIB Symposium 2008
Editor(s)
Walraven J.C.
Stoelhorst D.
Stoelhorst D.
Pages
6
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