Electrode structure for protection of structural bodies

Details Electrode structure for protection of structural bodies Electrode structure for protection of structural bodies

C - Chemistry, Metallurgy

23

F

C23F 13/00 (2006.01) C23F 13/16 (2006.01)

Patent

CA 2469391

Electrolytic protection of steel-reinforced concrete bodies such as bridges and building facades is achieved with carbon material (3, 12, 23) inserted into the concrete body (6, 10, 21). The carbon material is connected to act as a anode with the steel reinforcement (1, 11, 22) as a cathode, so that corrosive chloride ions migrate away from the steel reinforcement. The carbon material is inserted so as also to act as a reinforcement. In one arrangement carbon textile material is provided between inner and outer grout-filled plastics ducts (2, 4, 5) fixed around post-tensioned steel cables (1). In another arrangement a carbon rod (12), or pin (23), is fixed between a concrete body (23) and a steel I-beam (22).

Selon l'invention, la protection électrolytique de corps en béton armé à acier tels que des ponts et des façades de bâtiments est assurée par un matériau en carbone (3, 12, 23) inséré dans le corps en béton (6, 10, 21). Le matériau en carbone, servant d'anode, est relié à l'armure en acier (1, 11, 22), servant de cathode, de sorte que les ions chlorure corrosif migrent à l'opposé de l'armure en béton. Le matériau en carbone est inséré de façon à agir également en tant qu'armure. Dans un agencement, un matériau textile en carbone est placé entre des conduits plastiques internes et externes (2, 4, 5) remplis d'un coulis et fixés autour de câbles (1) en acier postcontraints. Dans un autre agencement, une barre (12) ou une tige (23) de carbone est fixée entre un corps de béton (23) et une poutre en I (22) en acier.

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