Cement accelerators
AssigneeMBT Holding AG
InventorSalvatore Valenti
Life of this patent
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Abstract
A cement setting and hardening accelerator having the formula Al(OH).sub.x (R).sub.y wherein R is a basic anion which is not sulphate, and x+y=3. The anion is preferably derived from an acid RH.sub.n which is preferably an organic acid. The accelerator gives excellent performance in shotcrete and is alkali-free.
Claims20
A cement setting and hardening accelerator having the formula
- Al(OH).sub.x (R).sub.y
- wherein R is a basic anion which is not sulphate, and x+y=3, wherein x and y are not 0, and wherein R is derived from an organic acid.
A method of applying a cementitious coating on a substrate, comprising preparing a sprayable cementitious composition and spraying it on to a substrate through a nozzle, while adding to the cementitious composition at the nozzle a cement setting and hardening accelerator according the formula
- Al(OH).sub.x (R).sub.y
- wherein R is a basic anion which is not sulphate, and x+y=3, wherein x and y are not 0 , and wherein R is derived from an organic acid.
Dependencies are inferred from the claim text.