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US 6,602,343 B1Granted
Quick setting cement with lime and aluminates
AssigneeItalcementi S.p.A.
InventorsUmberto Costa, Lorenzo Barcella
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Abstract
The present invention refers to a hydraulic binder made from Portland clinker containing calcium fluoroaluminate 11CaO.7Al2O3.CaF2, to which sodium aluminate, lime, and optionally, sodium bicarbonate are added. The added lime has not undergone the formation process of clinker. The cement mix that can be obtained with this binder has a very short hardening time, scarcely influenced by temperature variations during laying operations.
Claims27
An hydraulic binder for cement compositions comprising:
- (a) a clinker, obtained by a baking process, comprising calcium fluoroaluminate (C11A7f), (b) sodium aluminate in quantities between 0.01% and 0.5% by weight with the respect to the weight of the binder and (c) lime added to the clinker after the baking process thereof.
Dependencies are inferred from the claim text.