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US 6,332,971 B1Granted
Electrochemical treatment of reinforced concrete
AssigneeAtraverde Limited
InventorAndrew Hill
Life of this patent
Estimating the term…
Abstract
Electric current of about 1 A/M2 is applied to reinforcement in concrete and the gases released are allowed to pass to the atmosphere via gas permeable set material in a hole alongside the electrode.
Claims15
A method for cathodically protecting a concrete body containing metal reinforcement, said method comprising the steps of:
- (a) creating a hole of a predetermined diameter in the concrete body to a depth to approach the metal reinforcement;
- (b) inserting an electrode comprising conductive and corrosion resistant material into said hole, said electrode being of a smaller diameter than said hole whereby an annular clearance is established;
- (c) filling said clearance with a gas permeable material and allowing said gas permeable material to set;
- (d) applying an electric current between said electrode and the reinforcement at a current density level selected such that the reinforcement is cathodically protected and allowing gases generated thereby to reach the ambient atmosphere via said gas permeable material.
1 more element
A concrete structure having a concrete body and metal reinforcement therein, said structure comprising:
- a hole extending from a surface of the concrete body to a position adjacent the metal reinforcement;
- said hole containing an electrode surrounded by a gas permeable material;
- and
- wherein said electrode comprises a non-porous, conductive and corrosion resistant material and is arranged to carry a current at a high current density.
1 more element
Dependencies are inferred from the claim text.