C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/14 (2006.01) C04B 14/10 (2006.01) C04B 14/26 (2006.01)
Patent
CA 2361710
A prefabricated fire-resistant construction element having a relatively low average thickness, comprising a hardened plaster-based substrate that can be obtained by hydration, by mixing for example dry matter that is primarily made up of at least one hydratable calcium sulphate and a mineral additive in a discrete form comprising an argillaceous material, characterized in that the mineral additive substantially comprises argillaceous material wherein the amount of crystalline silica is at the most approximately 15 % of the weight of said mineral additive, and an inert mineral complement that is compatible with argillaceous material and is dispersible in the hardened plaster substrate.
Elément de construction préfabriqué, résistant au feu, ayant une épaisseur moyenne relativement faible, comprenant un substrat à base de plâtre durci, ledit substrat étant susceptible d'être obtenu par hydratation, par exemple gâchage, d'une matière sèche comprenant majoritairement au moins un sulfate de calcium hydratable, et un additif minéral sous forme discrète, comprenant un matériau argileux, caractérisé en ce que, l'additif minéral comporte essentiellement un matériau argileux dont la quantité de silice cristalline est au plus égale à environ 15 % en poids dudit additif minéral, et un complément minéral inerte, compatible avec le matériau argileux et dispersable dans le substrat de plâtre durci.
Lafarge Platres
Ogilvy Renault
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