Solidifying and hardening accelerator for hydraulic binders

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 22/08 (2006.01) C04B 20/02 (2006.01) C04B 22/14 (2006.01) C04B 24/04 (2006.01) C04B 24/16 (2006.01) C04B 24/40 (2006.01) C04B 40/00 (2006.01)

Patent

CA 2271629

The invention concerns novel liquid solidifying and hardening accelerators obtained by a process in which the following components: component a: basic aluminium salts and/or aluminium hydroxide; component b: aluminium sulphate and/or sulphuric acid; component c: organic carboxylic acids or mixtures of at least two of the organic carboxylic acids; component d: aluminium salts of organic carboxylic acids; component e: organic and/or inorganic sulphates and/or hydrogen sulphates and/or carbonates and/or hydrogen carbonates and/or alkaline earth oxides and/or alkaline earth hydroxides, are reacted in water at temperatures of up to 150 ~C such that a solution is obtained, wherein: 1. all the components or a selection of the components react with one another such that the molar ratios of aluminium to sulphate in the end product are between 0.83 and 13.3 and the molar ratios of the aluminium to organic carboxylic acid are between 0.67 and 33.3; or 2. all the components apart from component e or a selection of the components apart from component e react with one another such that the molar ratios of aluminium to sulphate in the end product are between 0.83 and 13.3 and the molar ratios of aluminium to organic carboxylic acid in the end product are between 0.67 and 33.3; or 3. component e is subsequently dissolved in the reaction product according to point 2. The compounds can be used in combination with other compounds.

L'invention concerne de nouveaux accélérateurs liquides de prise et de solidification qui sont mis à réagir dans de l'eau à des températures pouvant atteindre 150 ·C, par réaction des constituants suivants: constituant a): sels d'aluminium basiques et/ou hydroxyde d'aluminium; constituant b): sulfate d'aluminium et/ou acide de soufre; constituant c): acides carboxyliques organiques ou mélanges d'au moins deux des acides carboxyliques organiques; constituant d): sels d'aluminium des acides carboxyliques organiques; constituant e): sulfates organiques et/ou inorganiques et/ou sulfates d'hydrogène et/ou carbonates et/ou carbonates d'hydrogène et/ou oxydes alcalino-terreux et/ou hydroxydes alcalino-terreux, de manière à obtenir une solution. 1) Tous les constituants ou une sélection des constituants régissent les uns avec les autres, de manière que dans le produit final, les rapports molaires de l'aluminium au sulfate soient compris entre 0,83 et 13,3 et que les rapports molaires de l'aluminium à l'acide carboxylique organique soient compris entre 0.67 et 33,3. 2) Tous les constituants à l'exception du constituant e) ou une sélection des constituants à l'exception du constituant e) réagissent les uns avec les autres, de manière que dans le produit final, les rapports molaires de l'aluminium au sulfate soient compris entre 0,83 et 13,3 et que les rapports molaires de l'aluminium à l'acide carboxylique soient compris entre 0,67 et 33,3. 3) Le constituant e) est ensuite dissous dans le produit de réaction suivant le point 2. Ces composés peuvent s'utiliser en combinaison avec d'autres composés.

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