C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 18/06 (2006.01) E04C 1/00 (2006.01)
Patent
CA 2627717
A method of manufacturing a cementitious composite includes: (1) forming mixing an extrudable cementitious composition by first forming a fibrous mixture comprising fibers, water and a rheology modifying agent and then adding hydraulic cement; (2) extruding the extrudable cementitious composition into a green extrudate, wherein the green extrudate is characterized by being form-stable and retaining substantially a predefined cross-sectional shape; (3) removing a portion of the water by evaporation to reduce density and increase porosity; and (4) causing or allowing the hydraulic cement to hydrate to form the cementitious composite. Such a process yields a cementitious composite that is suitable for use as a wood substitute. The wood-like building products can be sawed, nailed and screwed like ordinary wood.
Procédé de fabrication de composite cimentaire, comprenant les étapes consistant à : (1) former et mélanger une composition cimentaire extrudable en formant d'abord un mélange fibreux comportant des fibres, de l'eau et un agent modificateur de rhéologie puis en ajoutant du ciment hydraulique ; (2) extruder la composition cimentaire extrudable en un corps extrudé cru, ledit corps extrudé cru étant caractérisé en ce qu'il conserve sa forme et garde sensiblement une forme de section droite prédéfinie ; (3) retirer une partie de l'eau par évaporation pour réduire la densité et augmenter la porosité ; et (4) provoquer ou permettre l'hydratation du ciment hydraulique pour former le composite cimentaire. Un tel processus donne un composite cimentaire qui convient pour une utilisation comme substitut de bois. Les produits de construction semblables à du bois peuvent être sciés, cloués et vissés comme du bois ordinaire.
Andersen Per Just
Hodson Simon K.
Cassan Maclean
E. Khashoggi Industries Llc
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