LAFARGE Patent applications |
Patent application number | Title | Published |
20150274589 | PROCESS, GRINDING UNIT AND PRODUCTION OF A HYDRAULIC BINDER - A compression grinding process of at least one component of a hydraulic binder, include the compression of a bed of material formed by this or these component(s) in a grinding zone, and the addition of oil to the bed of material, via a distribution device located upstream of the inlet to the grinding zone. | 10-01-2015 |
20150020714 | HYDRAULIC COMPOSITION WITH LOW CLINKER CONTENT - A hydraulic binder including in parts by mass:
| 01-22-2015 |
20140245929 | SURFACTANTS - A particulate material for the production of a cement foam which material includes particles including, attached to the particle surface, a surfactant which renders the particles hydrophilic, the surfactant including a moiety which is hydrolysable under alkaline conditions, which surfactant, after loss of the moiety by alkaline hydrolysis, renders the particles partially hydrophobic. | 09-04-2014 |
20140174325 | PROCESS FOR THE PRODUCTION OF A RAPID HYDRAULIC BINDER - A process for the production of a hydraulic binder, includes co-grinding a clinker and 0.1 to 5% by dry mass relative to the mass of clinker, of a material including more than 15% by mass of calcium silicate hydrate relative to the solid fraction of the material. | 06-26-2014 |
20140120022 | PROCESS FOR THE MINERALIZATION OF CARBON DIOXIDE - A process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process includes contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound. | 05-01-2014 |
20140079889 | CURING PROCESS FOR CONCRETE - A curing process of a concrete element including at least partially coating the element with a curing composition, the composition including a solvent and a thickening agent, the thickening agent being insoluble at a pH greater than 12 and being soluble in the solvent for a solubility range of pH, the upper limit of the solubility range being less than 11. | 03-20-2014 |
20140072484 | DECARBONATION PROCESS - A process for decarbonation of particles of raw meal, to be burnt in a clinkering kiln at a cement plant, the process includes: a) decarbonation of particles of raw meal, in a fluidised bed heat exchanger, the particles being suspended in a rising carrier gas including carbon dioxide, the fluidised bed heat exchanger having a solid heat carrier circulating counter-current relative to the carrier gas, to provide an effluent gas including carbon dioxide and decarbonated raw meal; b) separating the effluent gas and the decarbonated raw meal c) separating the effluent gas into a first and second part; cooling the first part of the effluent gas and recycling to provide carrier gas, d) isolating the second part of effluent gas e) recovering and re-heating the heat carrier and recirculating to step (a). | 03-13-2014 |
20140033951 | ASPHALT MIXTURE WITHOUT VIRGIN BITUMEN BASED ON RECYCLED MATERIALS - An asphalt mixture includes bitumen partially or in totality proceeding from construction materials, the bitumen having been regenerated using a fatty acid ester which is obtained from esterified vegetable oil. | 02-06-2014 |
20130298805 | HYDRAULIC BINDER WITH LOW CLINKER CONTENT - A hydraulic binder includes, in parts by mass: (a) from 20 to 60 parts of Portland clinker; (b) from 20 to 40 parts of slag; and (c) from 0 to 60 parts of inorganic material other than the clinker and the slag; the sum of (a), (b) and (c) being equal to 100 parts; which binder further includes a slag activator including, relative to 100 parts of the sum of (a) and (b): from 1.4 to 6.55 parts of alkali metal salt, expressed as equivalent—Na | 11-14-2013 |
20130284073 | PROCESS FOR CARBON DIOXIDE REMOVAL FROM A GAS BY CONTACTING IT WITH A SOLID - A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour which process includes contacting the gas with a particulate solid, which solid is a waste material which includes an alkaline earth metal oxide or hydroxide or a mixture thereof and which particulate solid also includes an added alkali metal compound which is an alkali metal hydroxide, carbonate or bicarbonate, or a mixture thereof. | 10-31-2013 |
20130273319 | METHOD FOR TREATING A CONCRETE SURFACE TO PROVIDE A PHOTOCATALYTIC COATING - A method for the treatment of a concrete surface includes at least partially covering the surface with a first coating which is substantially transparent and substantially impermeable to water; and at least partially covering said first coating with a second coating which is substantially transparent and photocatalytic; the surface having an average roughness R | 10-17-2013 |
20130123392 | HYDRAULIC COMPOSITION - A hydraulic composition including | 05-16-2013 |
20130102705 | PROCESS FOR TRANSPORTATION OF A HYDRAULIC COMPOSITION - A process for transportation of a fresh hydraulic composition including:
| 04-25-2013 |
20130041073 | PLASTICIZING MIXTURE FOR A HYDRAULIC COMPOSITION - A mixture for a hydraulic composition, including an inerting agent for at least partially neutralizing the harmful effects of impurities in a hydraulic composition on the workability of the hydraulic composition; a first superplasticizer different from the inerting agent; and a second superplasticizer different from the first superplasticizer and the inerting agent and having a maximum plasticizing action at 20° C. developing after the peak of the plasticizing action at 20° C. of the first superplasticizer. | 02-14-2013 |
20130035417 | PROCESS TO INERT NON-SWELLING CLAYS - A process to inert non-swelling clays in at least one mineral component intended for the preparation of a hydraulic composition, including the addition, to the hydraulic composition, to the mineral component or to one of the other constituents of the hydraulic composition, of an organic molecule having a cationic charge density strictly less than 0.5 meq/g and including at least two atoms each being capable of forming at least one hydrogen bond. | 02-07-2013 |
20130019779 | ADMIXTURE FOR A HYDRAULIC COMPOSITION - A method includes using, as an inerting agent of carbonaceous materials, for treatment of at least one constituent of a hydraulic composition comprising at least one air-entraining agent, the constituent including the carbonaceous materials, of an admixture, including at least one polymer comprising at least one chain having hydrophobic end groups and an intermediary hydrophilic group between the end groups, the admixture being adapted to at least partially neutralise the carbonaceous materials. | 01-24-2013 |
20120318171 | NEW FOAMED CONCRETE - A foamed concrete having a density from 100 to 800 kg/m | 12-20-2012 |
20120316267 | METHOD FOR PREPARING A HYDRAULIC COMPOSITION - In one embodiment, the present invention includes a method for preparing a hydraulic composition including sand in which clay is present, the method including adding to the sand and clay a cationic polymer having a density of cationic charges which is greater than 0.5 meq/g and an intrinsic viscosity which is less than 1 dl/g, said cationic polymer being present in an amount of from 2-20% by weight based on the amount of clay present, said clay present in an amount of from 0.5-5% by weight of the sand present, and water. | 12-13-2012 |
20120315464 | LIGHTWEIGHT CEMENT BOARD - A cement board has a density from 200 to 1000 kg/m | 12-13-2012 |
20120312193 | FOAMED CONCRETE - A foamed concrete having a density from 100 to 800 kg/m | 12-13-2012 |
20120304893 | PROCESS FOR PRODUCTION OF A HYDRAULIC COMPOSITION WITH ENTRAINED AIR - A treatment process for the production of a hydraulic composition with entrained air including at least one admixture and a constituent including carbonaceous materials, the process including: obtaining a representative value of the adsorption of probe molecules by the carbonaceous materials; and producing the hydraulic composition or treating the constituent with a quantity of admixture which depends on the value. | 12-06-2012 |
20120291672 | PROCESS FOR REDUCING THE CONCENTRATION OF CARBON DIOXIDE IN AN EXHAUST GAS - A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour (for example a flue gas or a cement plant flue gas) which process includes contacting the gas with a particulate solid, which solid includes an alkaline earth metal oxide or hydroxide and a promoter selected from an alkanolamine; an unsubstituted or substituted piperazine; an unsubstituted or substituted morpholine; and a polyethyleneamine oligomer. | 11-22-2012 |
20120238006 | PROCESS FOR REMOVAL OF CARBON DIOXIDE FROM A GAS STREAM - A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process includes, in a first stage, contacting the carbon dioxide-containing gas with a treating solution including an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution including an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material including an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate including the cation and to regenerate a solution including alkali metal carbonate. | 09-20-2012 |
20120216723 | INERTING PROCESS FOR IMPURITIES - An inerting process for impurities in aggregates intended for preparation of hydraulic or hydrocarbon compositions, includes adding to the composition or to one of its constituents a cationic polymer corresponding to at least one derivative of a natural polymer or a polymer of natural origin selected from the group including dextrin (in particular yellow dextrin and white dextrin), chitosan, chitin, alginates, hemicellulose, pectin, polyols or proteins. | 08-30-2012 |
20120204719 | USE OF A CONCRETE-BASED ELEMENT FOR TREATMENT OF GASES AND VOLATILE COMPOUNDS - A method includes using an element which includes a monoblock concrete body with a volume greater than 1 L and a surface porosity greater than 8%, which body includes in the body and/or on a surface thereof a compound having a BET specific surface greater than 100 m | 08-16-2012 |
20120145045 | ADDITIVES FOR A HYDRAULIC BINDER BASED ON BELITE-CALCIUM-SULPHOALUMINATE-FERRITE CLINKER - A composition includes at least, in % expressed by mass relative to the total mass of the composition, from 0.01 to 3% of polycarboxylic acid or salts thereof, the polycarboxylic acid including 2 to 4 carboxyl groups per molecule; and from 97 to 99.99% of a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF clinker). | 06-14-2012 |
20120136096 | PROTECTION OF A DISPERSING AGENT DURING A GRINDING OPERATION - A method includes using a composition in the production of cement, the composition including at least one dispersing agent and at least one sacrificial molecule to partially or totally retain the properties of the dispersing agent; being either in the form of a liquid solution, or an emulsion or a suspension; the quantity of the sacrificial molecule in the composition representing at least 5% by mass of the mass of dispersing agent; and being introduced before or during the grinding of the clinker. | 05-31-2012 |
20120129981 | FLUIDIZING MIX FOR A COMPOSITION WITH A BASE OF HYDRAULIC BINDER - A hydraulic composition includes at least one hydraulic binder; at least one first water-reducing additive including at least one phosphonic amino-alkylene group; at least one second water-reducing additive including at least one polymer with a comb structure, the concentration by weight of dry extract of the second additive being from 25% to 100% of the concentration by weight of dry extract of the first additive. | 05-24-2012 |
20120095134 | VISCOSITY-REDUCING SUPER-PLASTICISING COPOLYMERS - The invention mainly relates to the use of a (co)polymer having a main chain essentially consisting of (meth)acrylic units and polyoxyalkylated side-chains containing statistically-distributed hydrophobic units as an adjuvant for lowering the viscosity of hydraulic compositions. | 04-19-2012 |
20120085265 | INDUSTRIAL PROCESS FOR THE PRODUCTION OF A CLINKER WITH A HIGH CONTENT OF BELITE - A process for producing a clinker with a high content of belite, includes (i) introducing a raw meal into a calcination chamber of a cement plant kiln; (ii) calcining the raw meal at a temperature of from 1150° C. to 1375° C.; (iii) measuring the weight per litre of the product of step (ii) and eliminating the product having a weight per litre strictly less than 650 g/litre; (iv) measuring the quantity of SO | 04-12-2012 |
20120056348 | MOULDING DEVICE AND PRODUCTION PROCESS - A production process includes introducing the material to be moulded into a mould, placing the mould in an envelope comprising a vacuum port; creating a low pressure in the envelope by formation of a gas flow through the vacuum port; deforming the mould; stopping the gas flow; and applying pressure on at least a portion of the mould, optionally with interposition of the envelope, at least after the gas flow is stopped. | 03-08-2012 |
20120041103 | Fast Hydraulic Binder for Parts and Constructions Made of Concrete Containing A Calcium Salt - 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. | 02-16-2012 |
20120037045 | HIGH OR ULTRA-HIGH PERFORMANCE CONCRETE - A binder premix includes from 0.2% to 63% of a material of an ultrafine particle size category, including individual particles with a D90 value less than 1 μm and/or with a BET specific surface greater than 5 m | 02-16-2012 |
20120035302 | PROCESS FOR THE PRODUCTION OF A BITUMINOUS COMPOSITION - 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 metre 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. | 02-09-2012 |
20120024198 | CONCRETE WITH A LOW CLINKER CONTENT - A dry binder premix includes, in mass proportions: Portland clinker having a Blaine specific surface area comprised from 4500 to 9500 cm | 02-02-2012 |
20120012315 | LOW DENSITY CEMENTITIOUS COMPOSITIONS USING LIMESTONE - A manufactured cementitious binder includes a hydraulic binder in an amount in the range of from 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from 1 to 30% by weight of the cementitious binder; silica fume in an amount up to 15% by weight of the cementitious binder; limestone in an amount of from 5 to 30% by weight of the cementitious binder, and a cementitious accelerator in a controlled amount of at least 0.5% by weight of the cementitious binder, the cementitious binder providing a cementitious settable composition when added with water, wherein for a density lower than 13 pounds per gallon and of at least 11 pounds per gallon obtained without a lightweight additive, said cementitious settable composition exhibits a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi. | 01-19-2012 |
20120012314 | LOW DENSITY CEMENTITIOUS COMPOSITIONS USING LIME KILN DUST - A manufactured cementitious binder including a hydraulic binder in an amount in the range of from about 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from about 1 to 30% by weight of the cementitious binder; silica fume in an amount up to about 15% by weight of the cementitious binder; lime kiln dust in an amount of from about 5 to 30% by weight of the cementitious binder, and a cementitious accelerator in an amount greater than about 0.1% by weight of the cementitious binder, wherein the cementitious binder provides a cementitious settable composition, when added with water and without a lightweight additive, that has a density lower than about 13 pounds per gallon and greater than about 11 pounds per gallon and a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi. | 01-19-2012 |
20110259247 | HYDRAULIC BINDER WITH A BASE OF SULFOALUMINATE CLINKER AND PORTLAND CLINKER - The present invention relates to a composition including at least a Portland clinker and a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF). | 10-27-2011 |
20110083585 | AQUEOUS FORMULATIONS - An aqueous slurry including a particulate pozzolan, different from silica fume, which pozzolan includes less than 80% silicon dioxide, and, optionally, a particulate substantially inert filler: wherein the dry matter content of the slurry is from 30% to 90% by weight; substantially all of the elementary particles of pozzolan and filler have an elementary particle size less than 100 μm; and the particles have a mean particle size less than 15 μm. | 04-14-2011 |
20110041736 | ADDITIVES FOR CEMENT - A belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition including: a BCSAF clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase having the general formula C | 02-24-2011 |
20100326326 | CONCRETE COMPOSITION - A ductile ultra-high performance concrete which includes in relative parts by weight: 100 of Portland cement; 50 to 200 of a sand having a single grading with a D1O to D90 between 0.063 and 5 mm, or a mixture of sands, the finest sand having a D1O to D90 between 0.063 and 1 mm and the coarsest sand having a D1O to D90 between 1 and 5 mm; 0 to 70 of a particulate pozzolanic or non-pozzolanic material or a mixture thereof having a mean particle size less than 15 μm; 0.1 to 10 of a water-reducing superplasticizer; 10 to 30 of water; and 0.5 to 5% by volume relative to the volume of the hardened composition of glass fibres having an aspect ratio of 6 to 120. | 12-30-2010 |
20100294496 | LOW DENSITY CEMENTITIOUS COMPOSITIONS - A manufactured cementitious binder including a hydraulic binder in an amount in the range of from about 40 to 75% by weight of the cementitious binder; metakaolin in an amount greater than about 5% by weight of the cementitious binder; silica fume in an amount up to about 15% by weight of the cementitious binder; and cement kiln dust in an amount greater than about 10% by weight of the cementitious binder, the cement kiln dust including chlorine in an amount of at least 0.1% by weight of the cement kiln dust, the cementitious binder providing a cementitious settable composition, when added with water and without a lightweight additive, that has a density lower than about 13 pounds per gallon and greater than about 11 pounds per gallon and a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi. | 11-25-2010 |
20100294171 | CONCRETE WITH A LOW CLINKER CONTENT - A process for the preparation of a wet concrete composition, including a stage of mixing of: Portland clinker in the form of grains having a Dv97 from 10 to 30 μm or having a Blaine specific surface greater than or equal to 5300 cm | 11-25-2010 |
20100212551 | FORMULATION, UTILISATION AND PROCESS TO OBTAIN A LIGHTWEIGHT STRUCTURAL CONCRETE - A lightweight structural concrete includes a hydraulic binder; effective water; a superplasticizer; and aggregates; the concrete having a density in the fresh state varying from 1.40 to a D | 08-26-2010 |
20100132590 | HIGH BELITE-CONTAINING SULFOALUMINOUS CLINKER, METHOD FOR THE PRODUCTION AND THE USE THEREOF FOR PREPARING HYDRAULIC BINDERS - A sulphoaluminate clinker includes as a phasic formulation, compared with the total weight of clinker: 5 to 25% of a calcium aluminoferrite phase with a formulation corresponding to the general formula C2AXF(1−X), with X comprised between 0.2 and 0.8; 15 to 35% of a calcium sulphoaluminate phase yee' limit (C4A3$); 40 to 75% belite (C2S); from 0.01 to 10% of one or several minor phases selected from the group consisting of calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase, and/or a vitreous phase, and additives including at least sodium and boron present in the following quantities, by weight as compared to the total weight of the clinker: from 0.1 to 5% of sodium expressed as sodium oxide and from 0.2 to 3% of boron, expressed as boron oxide, the total content of said additives being less than or equal to 15%. | 06-03-2010 |
20100116173 | PROCESS TO REDUCE THE AMOUNT OF Cr (VI) IN A CEMENT-CONTAINING COMPOSITION AND A COMPOSITION COMPRISING CEMENT AND COATED METALLIC SULPHATE PARTICLES - A method for producing a cement-containing material having a low content of soluble Cr (VI), the method including providing a cement-containing material with metallic sulphate particles coated with at least one product of the hydrolysis of a collagen material. | 05-13-2010 |
20100068401 | PROCESS FOR TREATING CONCRETE - A method of treating a concrete surface to render it less susceptible to undesired staining or marking, the method comprising contacting the surface with an aqueous solution comprising a water soluble polyphosphate of a monovalent or divalent cation. | 03-18-2010 |
20100043673 | CONCRETE COMPOSITIONS - A concrete which includes in parts by weight: 100 Portland cement; 50 to 200 of a sand having a single grading with a D10 to D90 between 0.063 and 5 mm, or a mixture of sands, the finest sand having a D10 to D90 between 0.063 and 1 mm and the coarsest sand having a D10 to D90 between 1 and 4 mm; 10 to 50 of a particulate, substantially non-pozzolanic material having a mean particle size less than 15 μm; 0.1 to 10 of a water-reducing superplasticizer; and 10 to 30 of water; which concrete is substantially free of silica fume; the concrete having a compressive strength greater than 100 Mpa at 28 days. | 02-25-2010 |
20100037804 | PROCESS FOR THE PRODUCTION OF CEMENT - The invention provides a process for the production of cement which comprises the calcination of calcium carbonate-containing raw meal in a calciner heated by combustion of a carbon-containing fuel with a gas comprising oxygen and from 0 to 80% by volume of carbon dioxide, and substantially free of nitrogen, and isolating the gas produced by combustion and calcination in the calciner. | 02-18-2010 |
20090309272 | MOULDING DEVICE AND PRODUCTION PROCESS - A production process includes providing an envelope and a mould, introducing the material to be moulded in the mould, placing the mould in the envelope, creating a low pressure in the envelope, and deforming the mould. | 12-17-2009 |
20090305019 | CONCRETE COMPOSITION WITH REDUCED SHRINKAGE - A concrete composition includes: a hydraulic binder component which includes cement, particulate materials having a size of less than 200 μm, and an expansive agent; granular materials having a size (D50) greater than 200 μm; a shrinkage reducing agent; a superplasticizer; and water; wherein the water to hydraulic binder ratio is from 0.1 to 0.5 by weight, the shrinkage reducing agent is present at 0.1 to 1.0% by weight of binder, and the particulate materials are present in a concentration of from 10 to 80% by total weight of binder. | 12-10-2009 |
20090241696 | ON-LINE PRODUCTION PROCESS OF SAND PRESENTING A CONTROLLED METHYLENE BLUE VALUE - 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. | 10-01-2009 |
20080308013 | Rapid Binder Compositions Containing a Calcium Salt for Concrete Components and Structures - 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. | 12-18-2008 |
20080302210 | STEEL DESULPHURATING AGENT AND USE THEREOF IN THE DESULPHURATION OF STEEL - The invention relates to a steel desulphurating agent characterised in that it comprises compared with the total weight of the agent:
| 12-11-2008 |
20080245012 | Superhydrophobic gypsum boards and process for making same - A gypsum board which has a gypsum core having a first side and a second side and a facing sheet disposed on the first side, wherein the facing sheet is made of a sheet material and said sheet material has at least one surfactant, filler particles and at least one polymeric binder. Also, a process of making a gypsum board. | 10-09-2008 |