Process for the electrochemical treatment of concrete
AssigneeFosroc International Limited
InventorPamela Hird
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Abstract
A process for the electrochemical realkalization of reinforced concrete comprises passing a direct electric current between an anode associated with a layer of alkaline electrolyte applied to an external surface of the concrete and a cathode which is located internally in the concrete. The process causes the internal pH of the concrete to increase and a surface layer of the concrete to be impregnated with the electrolyte solution and which comprises a solution of potassium carbonate of concentration at least 0.3 Molar. The process may be applied to concrete a zone of which has a pH of less than 10.0 and the process continued until the pH reaches a level of at least 10.5, preferably at least 11.0.
Claims10
A process for the electro-chemical realkalization of reinforced concrete comprising passing a direct electric current between an anode in contact with a layer of aqueous alkaline electrolyte applied to an external surface of the concrete and a cathode which is located internally in the concrete, to cause the internal pH of the concrete to increase and a surface layer of the concrete to be impregnated with the electrolyte solution and wherein the aqueous electrolyte solution comprises an aqueous solution of potassium carbonate of concentration at least 0.3 Molar.
Dependencies are inferred from the claim text.