Fire-protection material

Details Fire-protection material Fire-protection material

C - Chemistry, Metallurgy

04

B

C04B 28/06 (2006.01) C04B 14/04 (2006.01) E04B 1/94 (2006.01)

Patent

CA 2424589

The fire-protection material for constructions made of concrete and prestressed concrete, especially for tunnels, in the form of prefabricated plates or sprayed-on and cured coatings is prepared from hydraulically curing compositions containing aluminous cement, optionally in admixture with Portland cement, fillers and, if desired, fibers, curing accelerators, curing delayers, plasticizing agents and foaming agents, wherein the cured material contains less than 5% by weight of ettringite and wherein the composition contains from 50 to 200 weight parts of aluminous cement and from 10 to 250 weight parts of xonotlite in the uncured composition.

L'invention concerne un matériau ignifuge pour constructions en béton et en béton précontraint, notamment pour tunnels, se présentant sous forme de plaques préfabriquées ou de revêtements pris, appliqués par pulvérisation. Ledit matériau est obtenu à partir de mélanges à prise hydraulique contenant du ciment d'alumine fondu, éventuellement en mélange avec du ciment de Portland, des charges, ainsi que le cas échéant des fibres, des accélérateurs de prise, des retardateurs de prise, des agents plastifiants et des agents moussants. Le matériau pris contient moins de 5 % d'ettringite et le mélange dans le mélange qui n'est pas encore pris contient entre 50 et 200 parties en poids de ciment d'alumine fondu et entre 10 et 250 % parties en poids de xonotlite.

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