Patents Assigned to Lafarge
  • LIGHTWEIGHT PLASTERBOARD AND PLASTER SLURRY COMPOSITION USED FOR ITS MANUFACTURE
    Publication number: 20110197793
    Abstract: A plaster slurry composition includes plaster, water and starch, the starch having a Brookfield viscosity of less than 60 cps at a temperature below 60° C. and a Brookfield viscosity greater than 10,000 cps at a temperature of 70° C.
    Type: Application
    Filed: April 22, 2011
    Publication date: August 18, 2011
    Applicant: LAFARGE PLATRES
    Inventors: Michel RIGAUDON, Frédéric PERONNET
  • Additives for cement
    Patent number: 7998267
    Abstract: 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 C2AxF(1?X), wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% of belite (C2S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; and an alkanolamine.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: August 16, 2011
    Assignee: LAFARGE
    Inventors: Ellis Gartner, Vincent Morin
  • LIGHTWEIGHT PLASTERBOARD AND PLASTER SLURRY COMPOSITION USED FOR ITS MANUFACTURE
    Publication number: 20110192520
    Abstract: A plaster slurry composition includes plaster, water and starch, the starch having a Brookfield viscosity of less than 60 cps at a temperature below 60° C. and a Brookfield viscosity greater than 10,000 cps at a temperature of 70° C.
    Type: Application
    Filed: April 22, 2011
    Publication date: August 11, 2011
    Applicant: LAFARGE PLATERS
    Inventors: Michel RIGAUDON, Frédéric Peronnet
  • CEMENTITIOUS FIBRE REINFORCED COMPOSITE CROSS ARM
    Publication number: 20110139503
    Abstract: A cross arm is provided, for use in a support structure for conductors within an electrical grid. The cross arm is made of a cementitious composite and has a rough “C” cross sectional shape. Pairs of the cross arms are attached to utility poles in a parallel position on opposite sides of the utility pole. Alternatively, a single cross arm may be attached to a utility pole. Embedded metal or glass fibre reinforced polymer bars extend along the length of the cross arms.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 16, 2011
    Applicants: British Columbia Transmission Corporation, Lafarge Canada Inc.
    Inventors: Juan Ignacio CARIAGA CRESPO, Adelana R. GILPIN-JACKSON, Janos Csaba TOTH
  • Device and method for the production of a water barrier in an unhardened roof tile
    Patent number: 7947209
    Abstract: The invention relates to a device and a method for producing a water barrier in unsolidified roof tile preforms. The inventive device comprises a molded piece with a recess as well as a die. The molded piece is disposed above the end of a roof tile perform, whereupon all or part of the rear edge of the roof tile perform is pressed upward by means of the die. The roof tile perform is then dried.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: May 24, 2011
    Assignee: Lafarge Roofing Technical Centers GmbH
    Inventors: Peter Srostlik, Günter Weiss
  • Adjuvant for hydraulic compositions
    Patent number: 7935748
    Abstract: The invention provides an admixture for a hydraulic binder composition comprising at least one cationic polymer and at least one anionic polymer, at least one of these polymers having a comb type of structure, wherein the mass ratio of the anionic polymer/cationic polymer is from 99.9/0.1 to 60/40. It also provides a process for its preparation as well as its use as a plasticizer.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: May 3, 2011
    Assignee: Lafarge SA
    Inventors: Sébastien Georges, Emmanuel Villard, Olivier Watt, Serge Ghilardi
  • ADMIXTURE FOR A HYDRAULIC BINDER
    Publication number: 20110086947
    Abstract: A method of using an admixture in hydraulic binders, in particular in plaster-based or anhydrous calcium sulphate-based compounds, the admixture being an acrylic polymer with controlled end chains.
    Type: Application
    Filed: June 10, 2009
    Publication date: April 14, 2011
    Applicant: LAFARGE GYPSUM INTERNATIONAL
    Inventors: Laurent Meunier, David Rinaldi, Hakimi Yahiaoui, Jean-Michel Faure
  • AQUEOUS FORMULATIONS
    Publication number: 20110083585
    Abstract: 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 ?m; and the particles have a mean particle size less than 15 ?m.
    Type: Application
    Filed: July 10, 2009
    Publication date: April 14, 2011
    Applicant: LAFARGE
    Inventors: Philippe Fonollosa, Fabrice Pourcel
  • Moulding device and production process
    Patent number: 7901615
    Abstract: 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.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: March 8, 2011
    Assignee: Lafarge
    Inventors: Mouloud Behloul, Sylvain Quidant
  • Concrete compositions
    Patent number: 7901504
    Abstract: 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 ?m; 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.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: March 8, 2011
    Assignee: Lafarge
    Inventors: Jean-François Batoz, Mouloud Behloul, Philippe Fonollosa
  • ADDITIVES FOR CEMENT
    Publication number: 20110041736
    Abstract: 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 C2AxF(1?X), wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% of belite (C2S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; and an alkanolamine.
    Type: Application
    Filed: March 24, 2009
    Publication date: February 24, 2011
    Applicant: LAFARGE
    Inventors: Ellis Gartner, Vincent Morin
  • FINISHING COMPOUND SUITABLE FOR ACOUSTIC SUPPORTS
    Publication number: 20110042163
    Abstract: A finishing compound having acoustic properties and including iii percentage by weight relative to the total weight of the product, at least 10 to 70% of water; 0.1 to 5% of a foaming agent; 0.1 to 5% of a thickening agent; 35 to 70% of a monogranular filler having a size greater than or equal to 100 ?m and excluding fine fillers; 0.1 to 8% of synthetic or animal fibres; 0.5 to 35% of binder.
    Type: Application
    Filed: April 21, 2009
    Publication date: February 24, 2011
    Applicant: Lafarge Gypsum International
    Inventors: Florence Serre, Rita Faddoul, Jean-Michel Faure, Claude Stock
  • Ridge strip apparatus
    Patent number: 7892077
    Abstract: Ridge strip apparatus. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: February 22, 2011
    Assignee: Lafarge Roofing Components GmbH & Co. KG
    Inventors: Manfred Sattler, Manfred Rinklake
  • FINISHING COMPOUND SUITABLE FOR AN ACOUSTIC SUPPORT
    Publication number: 20110034608
    Abstract: A finishing compound having acoustic properties and including in percentage by weight relative to the total weight of the product, at least 25 to 80% of water; 0.1 to 5% of a thickening agent; 0.01 to 0.8% of a dispersing agent; 10 to 60% of a monogranular filler wherein the D50 is greater than or equal to 100 ?m; 0.5 to 6% of binder; and not including a foaming agent; and presenting permeability to air after evaporation of the water from 800 to 6000 mks Rayls.
    Type: Application
    Filed: April 21, 2009
    Publication date: February 10, 2011
    Applicant: LAFARGE GYPSUM INTERNATIONAL
    Inventors: Florence Serre, Rita Faddoul, Jean-Michel Faure, Claude Stock
  • BINDER FOR MINE TAILINGS, ALLUVIAL SAND AND THE LIKE
    Publication number: 20110023756
    Abstract: A binder for mine tailings, alluvial sand and other aggregate used as a backfill for an underground void comprises ferrous slag, cement kiln dust and/or lime kiln dust, and Portland cement and/or lime; the binder displays strength characteristics better than or comparable to those achieved with conventional binders based on Portland cement or Portland cement and slag.
    Type: Application
    Filed: October 8, 2010
    Publication date: February 3, 2011
    Applicant: LAFARGE CANADA INC.
    Inventor: Brian O'Hearn
  • CONCRETE COMPOSITION
    Publication number: 20100326326
    Abstract: 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 ?m; 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.
    Type: Application
    Filed: December 19, 2008
    Publication date: December 30, 2010
    Applicant: LAFARGE
    Inventors: Stéphane Rigaud, Philippe Fonollosa, Gilles Chanvillard
  • High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders
    Patent number: 7850776
    Abstract: 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%.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: December 14, 2010
    Assignee: Lafarge
    Inventors: Ellis Gartner, Guanshu Li
  • Method of producing a structure
    Patent number: 7842218
    Abstract: Producing a structure, in which: building elements are juxtaposed so as to define a space between said building elements; a joint compound composition is mixed with water so as to obtain a joint compound; said space is filled with said joint compound composition, without using a tape; and said joint compound is left to harden, wherein said joint compound composition includes: a) 50 to 60% of calcium sulphate hemihydrate; b) 5 to 15% of an organic binder in powder form; and c) 0.05 to 0.2% of a water repellent selected from the group consisting of oleic acid, stearic acid and their alkali metal or alkaline-earth metal salts.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: November 30, 2010
    Assignee: Lafarge Platres
    Inventors: Christian Bonetto, Marc Domenech, Alain Petit
  • CONCRETE WITH A LOW CLINKER CONTENT
    Publication number: 20100294171
    Abstract: 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 ?m or having a Blaine specific surface greater than or equal to 5300 cm2/g, the minimum quantity of the clinker in kg/m3 being determined according to formula (V) for a clinker having a Dv97 from 10 to 30 ?m, or according to formula (VI) for a clinker having a Blaine specific surface greater than or equal to 5300 cm2/g: [(90×In(Dv97k))?150]×(Weff÷140)??Formula (V) in which Dv97k is the DV97 of the clinker given in ?m, Weff is the quantity of effective water in l/m3; [(?0.
    Type: Application
    Filed: September 24, 2008
    Publication date: November 25, 2010
    Applicant: LAFARGE
    Inventors: Arnaud Schwartzentruber, Emmanuel Garcia
  • LOW DENSITY CEMENTITIOUS COMPOSITIONS
    Publication number: 20100294496
    Abstract: 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.
    Type: Application
    Filed: May 17, 2010
    Publication date: November 25, 2010
    Applicant: LAFARGE
    Inventors: Wes Woytowich, Bill Carruthers, Benoit Cotnoir, Paul Lehoux, Richard McCorkle, Eric Bowman