Lafarge

Lafarge Sa

Sébastien Georges

Emmanuel Villard

Alain Jacquet

Cédric Comparet

Olivier Watt

Serge Ghilardi

Philippe Thouilleux

Vincent Duveau

Laurent Barcelo

Anik Delagrave

Bruno Thibaut

A bag is used to provide an admixture for a hydraulic composition, wherein a wall of the bag includes a layer, the layer including a water-soluble polymer, and wherein an admixture is present in the wall of the bag.

Bag and its use to provide admixture for a hydraulic composition

A treatment process for the production of a hydraulic composition with entrained air including at least one admixture and a constituent including carbonaceous materials, the process including: obtaining a representative value of the adsorption of probe molecules by the carbonaceous materials; and producing the hydraulic composition or treating the constituent with a quantity of admixture which depends on the value.

Process for production of a hydraulic composition with entrained air

A mix including at least one hydraulic and/or pozzolanic material and at least one water-soluble cationic polymer, the cationic polymer having a density of cationic charges greater than 0.5 meq/g and an intrinsic viscosity less than 1 dl/g, and the hydraulic and/or pozzolanic material not being clinker, nor limestone, nor gypsum, nor calcium sulphate, nor anhydrous calcium sulphate, nor hemi hydrated calcium sulphate, nor plaster, nor lime.

Composition with a base of hydraulic and/or pozzolanic material

The invention provides an admixture for a hydraulic binder composition comprising at least one cationic polymer and at least one anionic polymer, at least one of these polymers having a comb type of structure, wherein the mass ratio of the anionic polymer/cationic polymer is from 99.9/0.1 to 60/40. It also provides a process for its preparation as well as its use as a plasticizer.

Adjuvant for hydraulic compositions

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Mions, France

Sébastien Georges