Lafarge

Chryso

Lafarge Sa

Serge Ghilardi

Serge Sabio

Emmanuel Villard

Bruno Pellerin

Olivier Watt

Sébastien Georges

Christophe Levy

Xiaolin Pardal

Michel Testud

Lê-Chiên Hoang

A hydraulic binder includes a Portland clinker having a Blaine specific surface of 4000 to 5500 cm/g, from 2.5 to 8% of sulphate expressed by mass of SOrelative to the mass of clinker, from 1.5 to 10% of calcium nitrite and/or calcium nitrate expressed as anhydrous mass relative to the mass of clinker and from 15 to 50% of a mineral addition including calcium carbonate by mass relative to the total mass of binder.

Rapid hydraulic binder comprising a calcium salt

An inerting process for impurities in aggregates intended for preparation of hydraulic or hydrocarbon compositions, includes adding to the composition or to one of its constituents a cationic polymer corresponding to at least one derivative of a natural polymer or a polymer of natural origin selected from the group including dextrin (in particular yellow dextrin and white dextrin), chitosan, chitin, alginates, hemicellulose, pectin, polyols or proteins.

Inerting process for impurities

The invention concerns a fast binder comprising; cement; at least one superplasticizer; calcium nitrite; and at least one formic derivative. The invention also concerns concrete mixtures obtained from said binder and methods for making same.

Rapid binder compositions containing a calcium salt for concrete components and structures

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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Mery, France

Serge Ghilardi