E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
E04C 5/00 (2006.01) E04G 21/12 (2006.01) E04G 23/00 (2006.01) E04G 23/02 (2006.01)
Patent
CA 2137051
A method for the grouting of an unbonded post-tensioned cable in a concrete structure which cable is enclosed in a cable sheath is disclosed. The method includes the steps of pumping a curable hydrophobic grouting material, for example a polyurethane resin into the cable sheath to fill a selected length of the cable sheath with the grouting material and continuing the injection until the selected length of the sheath is filled with the grouting material and the material expelled from the sheath no longer includes any admixed water. Infiltrated water in the cable sheath is expelled by way of the injected grouting material so that corrosion of the cable is stopped and further corrosion prevented. The grouting material also bonds to the cable and the sheath thereby preventing a sudden eruption of the cable from the surrounding building structure should the cable break.
Cette invention concerne une méthode de cimentation de câbles de précontrainte par post-tension dans une structure en béton, ledit câble se trouvant à l'intérieur d'une gaine. La méthode comprend l'injection d'un coulis hydrophobe durcissable, par exemple une résine polyuréthanne, dans la gaine pour remplir celui-ci sur une longueur prédéterminée et poursuivre l'injection jusqu'à ce que la gaine soit totalement remplie sur la longueur prédéterminée et que le coulis sortant de la gaine ne renferme plus d'eau. L'eau infiltrée dans la gaine est chassée par le coulis afin de stopper la corrosion du câble. Le coulis colle au câble et à la gaine pour prévenir toute sortie explosive du câble de la structure précontrainte dans l'éventualité d'une rupture.
Borden Ladner Gervais Llp
Morrow Jack A.
LandOfFree
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