METHOD FOR INERTING IMPURITIES

• Main Authors: GHILARDI, SERGE, HOANG, LEIEN
• Format: Patent
• Language: English; French
• Published: 16.06.2011
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

The invention relates to a method for inerting impurities in aggregates for preparing hydraulic or hydrocarbon compositions, said method including a step that involves adding, to the composition or to one of the components thereof, a cationic polymer corresponding to at least one natural polymer derivative or derivative of natural origin selected from among the group including dextrin (in particular yellow dextrin or white dextrin), chitosan, chitin, alginates, hemicellulose, pectin, polyols, or proteins. L'invention vise un procédé d'inertage d'impuretés dans des granulats destinés à la préparation de compositions hydrauliques ou hydrocarbonées, comprenant une étape consistant à ajouter à la composition ou à l'un de ses constituants un polymère cationique correspondant à au moins un dérivé d'un polymère naturel ou d'origine naturelle choisi parmi le groupe comprenant la dextrine (notamment la dextrine jaune et la dextrine blanche), le chitosan, la chitine, les alginates, l'hémicellulose, la pectine, les polyols ou les protéines.