Additives for mineral binders, based on a product of internal dehydration of a hydrogenated sugar, mineral binders with additives and method of preparing same

   
   

The subject matter of the invention is a new additive for mineral binders comprising a composition containing at least one product of internal dehydration of a hydrogenated sugar which can especially be a dehydrated hexitol such as isosorbide, isomannide, sorbitan or mannitan and which can be introduced at a rate of between roughly 0.001 and 5% (dry/dry) within any mineral binder, said additive being advantageously used as an accelerator for setting and/or hardening and/or as an agent for improving the mechanical properties of the mineral binder. It has a remarkable efficiency, including at low temperatures.

Les thèmes de l'invention sont un nouvel additif pour les reliures minérales comportant une composition contenant au moins un produit de déshydratation interne d'un sucre hydrogéné qui peut particulièrement être un hexitol déshydraté tel que l'isosorbure, l'isomannide, le sorbitane ou mannitan et qui peut être présenté à un taux de entre approximativement 0.001 et 5% (dry/dry) dans n'importe quelle reliure minérale, ledit additif étant avantageusement employé comme accélérateur pour placer et/ou durcir et/ou comme agent pour améliorer les propriétés mécaniques de la reliure minérale. Ils ont une efficacité remarquable, incluant à de basses températures.

 
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