Lafarge

Lafarge Gypsum International

Continental Building Products LLC

Hakimi Yahiaoui

David Rinaldi

Jean-Michel Faure

Olivier Watt

Alain Jacquet

Stéphane Brocas

Laurence Martin

Laurent Meunier

A method includes using copolymers including at least polyoxyalkylenated monomer units and at least phosphorus-comprising monomer units as water-reducing agent in hydraulic binders.

Water-reducing agent for hydraulic binders

An embodiment of the invention provides a production process of sand including the extraction of sand from a quarry; the periodic, on-line and automated withdrawal of a sample of sand; and the automated measurement of the methylene blue value on the sample of sand. Another embodiment of the invention provides a production line of sand including means of extraction of sand from a quarry; periodic and automated means of withdrawal of a sample of sand; and automated means of measuring the methylene blue value for the sample of sand.

On-line production process of sand presenting a controlled methylene blue value

A method of using an admixture in hydraulic binders, in particular in plaster-based or anhydrous calcium sulphate-based compounds, the admixture being an acrylic polymer with controlled end chains.

Admixture for a hydraulic binder

Growing community of inventors

Saint Priest, France

Hakimi Yahiaoui