Lafarge

Stéphane Brocas

Emmanuel Villard

Alain Jacquet

Hakimi Yahiaoui

Laurence Martin

Mohsen Ech

Philippe Toubeau

Nicolas Richard

Hassan Baaj

Richard Taylor

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 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

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Montpellier, France

Stéphane Brocas