A process for the electrochemical treatment of concrete

Details A process for the electrochemical treatment of concrete A process for the electrochemical treatment of concrete

C - Chemistry, Metallurgy

04

B

204/80, 204/88

C04B 41/61 (2006.01) C23F 13/02 (2006.01) E04G 23/02 (2006.01)

Patent

CA 2294229

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 11Ø

Cette invention traite d'un procédé de réalcalinisation électrochimique de béton renforcé consistant à faire passer un courant électrique direct entre une anode, associée à une couche d'électrolyte alcalin appliquée sur une surface externe du béton, et une cathode située à l'intérieur du béton. Ce procédé provoque l'augmentation du pH interne du béton et l'imprégnation d'une couche superficielle de béton par la solution d'électrolyte qui renferme une solution de carbonate de potassium dont la concentration molaire est d'au moins 0,3. Ce procédé peut être appliqué à un bloc de béton dont une partie présente un pH inférieur à 10,0 et peut être poursuivi jusqu'à ce que le pH atteigne une valeur minimale de 10,5 et, de préférence, au moins 11,0.

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