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07Oct93 UK: HOW IT WORKS - BRIDGE REPAIR.

The system used to repair the bridge at Weston Favell consisted of glass fibre reservoir panels, each containing a temporary electrode weld mesh, fitted to the face of the affected concrete. With the panels sealed, water was added to form an electrolyte. The water was then heated to 30 deg C to speed up the rate of chloride extraction and a current of 1 A/sq m was passed from the cathode created at the rebar to the anode at the weld mesh. The negatively-charged chloride ions then migrated ...

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