Chryso

Lafarge

Chryso S.a.s.

Bruno Pellerin

Serge Sabio

Pascal Boustingorry

Frédéric Leising

David Rinaldi

Philippe Maitrasse

Horacio Naranjo

Serge Ghilardi

Christophe Levy

Isabelle Sgro

Nicolas Noiret

Sandrine Mateo

Frédéric Rudolph

Vanessa Kocaba

Martinho Duarte Amaro Correia

Karen Ayme

Pierre-Antoine Andreani

Lucia Ferrari

Jean-Philippe Bigas

Jerome Seurre

Jean-Michel Laye

Nathanael Olivi

David Sedan

Loic Lemiegre

David Babayan

Marie Jachiet

Sophie Lachenaud

Mickaël Herve

Claire Giraudeau

Jérôme Seurre

Disclosed is a method for using a secondary or tertiary alkanolamine for grinding cement, the method including: forming an inorganic acid salt of the alkanolamine; and adding the salified alkanolamine to a grinder.

Method for using alkanolamine in a grinder

The invention relates to an anti-filming surface adjuvant for hydraulic binders comprising at least one fat and at least one anti-caking agent, to its preparation method as well as to a method for preparing a hydraulic binder composition suitable for making screeds or self-compacting concretes (SCC) including the step consisting of adding to the hydraulic binder the adjuvant according to the invention at a dosage comprised between 50 and 1,500 g/mof screed or of concrete.

Anti-filming surface-active agent

The present invention is mainly aimed at a set-accelerating admixture for hydraulic compositions comprising, in an aqueous solution,

Set-accelerating admixture having improved stability

The invention relates to a compound of following formula (I): the preparation method thereof and the use of same.

Plasticizers for aqueous suspensions of mineral particles and hydraulic binder pastes

A fast hydraulic binder comprising cement, at least one first superplasticizer, a calcium salt, and at least one second superplasticizer different from the first superplasticizer and comprising a main chain and pendant groups connected to the main chain adapted so as to separate from the main chain in a basic medium, wherein the result is that the second plasticizer has a fluidifying action which increases at least temporarily over time in a basic medium.

Fast hydraulic binder for parts and constructions made of concrete containing a calcium salt

The present invention relates to a system of adjuvants for concrete comprising a superplasticizer, such as a polyalkoxylated polycarboxylate comb polymer; an accelerator selected from calcium salts; and a rheology extender, which is a polyalkoxylated polyphosphonate. The system of adjuvants is particularly useful for prefabricated concrete, which is used for producing concrete building elements in series such as slabs, walls, beams, frontage panels. Methods for preparing prefabricated concrete using this system of adjuvants are also provided.

Adjuvant system for prefabricated concrete

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 relates to an additive for reducing Cr(VI) ions to Cr(III) ions, comprising a complex of tin(II) and a carboxylic acid or a salt thereof, and to the process for the preparation thereof. It also relates to a process for preparing a material having a low chromium(VI) content. Finally, it relates to the use of said additive for reducing chromium(VI) ions to chromium(III) ions.

Additive for reducing chromium (VI) to chromium (III) ions

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Avon, France

Bruno Pellerin