| LAFARGE Patent applications |
| Patent application number | Title | Published |
|---|
| 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 |
