Roquette Freres

Clement Robert

Jean-Pierre Graux

Leon Mentink

A novel admixture for mineral binders is composed of a polyol composition with a high hydrogenated disaccharide content (&gE;40%). The hydrogenated disaccharide is advantageously chosen from maltitol, lactitol and mixtures thereof. Within the admixture, the polyol composition (for example, maltitol powder, a maltitol syrup or a hydrogenated starch hydrolysate) may be combined with conventional admixtures for mineral binders, particularly lignosulfonates. The hydrogenated disaccharides make it possible to obtain an excellent compromise between retardation, plasticity and the mechanical properties of the mineral binder. They may be used equally well for admixing with cements and raw materials for cements as for admixing with mortars, slurries and concretes.

Admixtures for mineral binders based on hydrogenated disaccharide, admixture-containing mineral binders, and a process for the preparation thereof

The present invention relates to a new plaster, coating or adhesive composition based on plaster, containing an amylaceous compound. The amylaceous compound used according to the invention consists of a cationic amylaceous compound having, characteristically, a fixed nitrogen content at least equal to about 0.15% and a solubility in water at least equal to about 50%.

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Sailly sur la Lys, France

Clement Robert