Use of organic polymer particles for the manufacture of lightened building materials of mortar, gypsum plaster or concrete

Use of organic polymer particles (I), comprising (before their expansion) graphite microparticles (II), as artificial aggregates to replace completely or partially natural aggregates (sand or gravel), for the manufacture of lightened building materials of mortar, gypsum plaster or concrete, where th...

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Bibliographische Detailangaben
Hauptverfasser:	CALLOU BRUNO, DE CADIER DE VEAUCE CHARLES
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE GENERAL PROCESSES OF COMPOUNDING LIME, MAGNESIA METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS REFRACTORIES SLAG THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE WORKING-UP
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Beschreibung
Zusammenfassung:	Use of organic polymer particles (I), comprising (before their expansion) graphite microparticles (II), as artificial aggregates to replace completely or partially natural aggregates (sand or gravel), for the manufacture of lightened building materials of mortar, gypsum plaster or concrete, where the weight percentage of (I) in (II) is 1-20. Independent claims are also included for: (1) light aggregates (III) ready to be used as artificial aggregates for the manufacture of mortars, gypsum plasters or concretes, comprising expanded (I) incorporating (II) at 1-20 (preferably 1-5) wt.%, where (I) are polystyrene, copolymers of styrene /ethylene unsaturated hydrocarbon and their mixtures, associated with one or more additives of surface-active agents, fluidifying or plasticizing agents, or air-entraining colloids, to increase their density and/or to reduce their electrostatism; (2) a lightened building material incorporating (III); and (3) a building material reduced of concrete type or mortar using cement as hydraulic binder and incorporating (III). La présente invention concerne le domaine général des agrégats artificiels utilisés pour la fabrication de bétons, plâtres et mortiers allégés.On préconise ici l'utilisation de particules de polymère organique incluant, préalablement à leur expansion, des microparticules de graphite, à titre d'agrégats artificiels pour remplacer totalement ou partiellement des agrégats naturels genre sable ou gravier, dans le cadre de la fabrication de matériaux de construction allégés. La teneur des particules de polymère organique en microparticules de graphite, exprimée en poids par rapport au poids desdites particules, est comprise entre 1 et 20 %, de préférence entre 2 et 3 %.Ces particules de polymère organique graphité améliorent les caractéristiques de résistance et d'isolation des matériaux obtenus ; de plus, en association avec un liant hydraulique de type ciment gris, elles améliorent l'aspect des produits obtenus.