Cementitious material

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 12/02 (2006.01)

Patent

CA 2643650

A cementitious material is provided that includes a phosphate based component and an alkali earth component. The alkali earth ion component has as a majority source a calcium aluminate calcium ion source of dodeca-calcium hepta-aluminate, or tricalcium aluminate. Magnesium oxide that has been fused and crushed to a size of less than 200 microns, alone or in combination with the calcium aluminate calcium ion source is also provided as the alkali earth ion component. When the phosphate based component and alkali earth ion components are combined in appropriate proportions, a rigid structure is obtained. A cementitious material formulation is also provided having an aqueous acidic phosphate solution as a part B and an alkali earth ion source as a part A that includes calcium aluminate, magnesium oxide or a combination thereof. Other additives include strength enhancing insoluble phosphate additive, an impurity metal reaction suppressant, tackifiers, anti-foaming agents, and the like.

La présente invention concerne un matériau cimentaire comprenant un composant à base de phosphate et un composant alcalino-terreux. Le composant d'ion alcalino-terreux possède, comme source majoritaire, une source d'ion calcium d'aluminate de calcium d'hepta-aluminate de dodéca-calcium, ou d'aluminate de tricalcium. De l'oxyde de magnésium qui a été fondu et concassé à une taille n'excédant pas 200 microns, seul ou en combinaison avec la source d'ion calcium d'aluminate de calcium, est également fourni en tant que composant d'ion alcalino-terreux. Lorsque le composant à base de phosphate et les composants d'ion alcalino-terreux sont combinés en proportions appropriées, une structure rigide est obtenue. L'invention concerne également une préparation de matériau cimentaire possédant une solution aqueuse acide de phosphate en tant que partie B et une source d'ion alcalino-terreux en tant que partie A comprenant l'aluminate de calcium, l'oxyde de magnésium ou une combinaison de ceux-ci. D'autres adjuvants comprennent un adjuvant de phosphate insoluble améliorant la résistance, un suppresseur de réaction du métal d'impureté, des agents poisseux, des agents anti-mousse et similaires.

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