Lafarge

Lafarge Sa

Envirotech Corporation

Holcim Technology Ltd

Emmanuel Villard

Martin Mosquet

Alain Jacquet

Olivier Watt

Sébastien Georges

Cédric Comparet

David Rinaldi

Horacio Naranjo

Serge Ghilardi

Philippe Thouilleux

Stéphane Brocas

Anik Delagrave

Laurent Barcelo

Bruno Thibaut

Vincent Duveau

Mohsen Ech

Nicolas Richard

Hassan Baaj

Philippe Toubeau

Jean-Michel Laye

Richard Taylor

Stéphane Venon

Emmanuel Faure

Denis Rocca

Stephane Venon

A process to inert non-swelling clays in at least one mineral component intended for the preparation of a hydraulic composition, including the addition, to the hydraulic composition, to the mineral component or to one of the other constituents of the hydraulic composition, of an organic molecule having a cationic charge density strictly less than 0.5 meq/g and including at least two atoms each being capable of forming at least one hydrogen bond.

Process to inert non-swelling clays

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 method for inerting clays in sands which are intended for the preparation of hydraulic compositions, the method including a step of adding to the hydraulic composition, or to one of the constituents thereof, a composition which may include at least 50% by weight of a cationic polymer which has a density of cationic charges which is greater than 0.5 meq/g and an intrinsic viscosity which is less than 1 dl/g as an active substance. The hydraulic composition may be a concrete or a mortar.

Impurity inerting composition

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

In one embodiment, the present invention includes a method for preparing a hydraulic composition including sand in which clay is present, the method including adding to the sand and clay a cationic polymer having a density of cationic charges which is greater than 0.5 meq/g and an intrinsic viscosity which is less than 1 dl/g, said cationic polymer being present in an amount of from 2-20% by weight based on the amount of clay present, said clay present in an amount of from 0.5-5% by weight of the sand present, and water.

Method for preparing a hydraulic composition

A process for the production of a bituminous composition, includes (i) producing a mix of aggregates with a maximum diameter less than or equal to 30 mm and of an amount less than or equal to 0.8 g per square meter of specific surface developed by the aggregates of at least one cationic polymer in the liquid form having a density of cationic charges greater than or equal to 0.5 meq/g and an intrinsic viscosity of from 0.01 to 0.8 dl/g; and (ii) putting the mix obtained in stage (i) into contact with at least one bituminous binder. A bituminous composition includes at least one specific cationic polymer and the use of at least one specific cationic polymer in the surface treatment of aggregates intended for the preparation of a bituminous composition are the other two subject-matters of the present invention.

Process for the production of a bituminous composition

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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Saint-Christo-en-Jarez, France

Emmanuel Villard