C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/14 (2006.01) C04B 14/10 (2006.01) C04B 14/42 (2006.01) C04B 24/42 (2006.01)
Patent
CA 2361711
A water-resistant prefabricated construction element comprising a hardened plaster-based substrate which can be obtained according to the following steps: (a) homogeneously mixing a dry material that essentially contains at least one hydratable calcium sulphate, a hydrofugating agent comprising at least one silicon compound and water, together with preforming of said substrate in a wet state, (b) the preformed substrate is dried in order to obtain a formed substrate in a solid, dry state. The invention is characterised in that the homongeneous mixture, prior to preforming when the substrate is in wet state, also comprises a mineral additive containing at least one mineral component that has a synergistic hydrogenating affinity with said silicon compound.
Elément de construction préfabriqué résistant à l'eau, comprenant un substrat à base de plâtre durci, ledit substrat étant susceptible d'être obtenu par au moins les étapes suivantes: (a) mélange homogène d'une matière sèche comprenant majoritairement au moins un sulfate de calcium hydratable, d'un agent d'hydrofugation comprenant au moins un composé siliconé, et d'eau, et préformage à l'état humide dudit substrat; (b) séchage du substrat préformé, pour obtenir ledit substrat formé à l'état solide et sec; caractérisé en ce que le mélange homogène, préalable au préformage à l'état humide du substrat, comprend également un additif minéral comportant au moins un composant minéral ayant une affinité synergique d'hydrofugation avec ledit composé siliconé.
Humbert Regis
Martin Daniel
Theuvsen Theo
Lafarge Platres
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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