Titanium, Vanadium, Chromium, Molybdenum, Tungsten, Manganese, Iron, Copper, Zinc, Tin Or Lead Compound Containing (ti, V, Cr, Mo, W, Mn, Fe, Cu, Zn, Sn, Pb) Patents (Class 106/733)
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Patent number: 9034099Abstract: The present invention relates to a novel cement which makes possible the preparation of concrete, grout or mortar which is resistant to internal sulfate reactions and to external sulfate attacks, and also the use of this cement for the preparation of concrete, grout or mortar.Type: GrantFiled: November 24, 2011Date of Patent: May 19, 2015Assignee: VICATInventors: Laetitia Bessette, Francois Hue, Martine Pasquier
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Publication number: 20150114267Abstract: Provided herein is a cementitious composition comprising a photoactivator, wherein the photoactivator is capable of converting NOx to NO2— or NO3— when exposed to ultraviolet (U.V.) or visible light.Type: ApplicationFiled: May 6, 2013Publication date: April 30, 2015Inventors: Gaurav Sant, Magdalena Balonis-Sant, Kimberly E. Kurtis
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Patent number: 8974586Abstract: One subject of the invention is a composition comprising from 5 to 65%, by weight relative to the total weight of the composition, of calcium silicate crystals; from 1 to 20%, by weight relative to the total weight of the composition, of calcium carbonate crystals; in addition from 0 to 50%, preferably from 1 to 40%, by weight relative to the total weight of the composition, of a compound of general formula mCaO.nSiO2.pH2O in which m and n, each independently, vary from 1 to 3 and p varies from 3 to 6; the ratio between the particle size d50 of the calcium silicate crystals and the particle size d50 of the calcium carbonate crystals being less than 10; another subject of the invention is a process for preparing said composition, and also the use of said composition in the dental field.Type: GrantFiled: April 5, 2011Date of Patent: March 10, 2015Assignee: Septodont ou Septodont SAS ou Specialties SeptodontInventors: Gilles Richard, Olivier Marie
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Patent number: 8968461Abstract: Conductive concrete mixtures are described that are configured to provide EMP shielding and reflect and/or absorb, for instance, EM waves propagating through the conductive concrete mixture. The conductive concrete mixtures include cement, aggregate, water, metallic conductive material, and conductive carbon particles and/or magnetic material. The conductive material may include steel fibers, and the magnetic material may include taconite aggregate. The conductive concrete mixture may also include graphite powder, silica fume, and/or other supplementary cementitious materials (SCM). The conductive carbon particles may comprise from about zero to twenty-five percent (0-25%) of the conductive concrete mixture by weight and/or the magnetic material may comprise from about zero to fifty percent (0-50%) of the conductive concrete mixture by weight.Type: GrantFiled: May 16, 2012Date of Patent: March 3, 2015Assignee: The Board of Regents of the University of NebraskaInventors: Christopher Tuan, Lim Nguyen, Bing Chen
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Patent number: 8968463Abstract: A material capable for trapping a flammable gas such as hydrogen comprising at least one metal oxide in a cementitious matrix is disclosed. According to some aspects, the preparation of such a material and its different uses are also disclosed.Type: GrantFiled: December 9, 2009Date of Patent: March 3, 2015Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: David Lambertin, Celine Cau Dit Coumes, Fabien Frizon, Christophe Joussot-Dubien
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Patent number: 8962537Abstract: The present invention relates to oil well drilling comprising a weighting agent consisting of microfine, particulate ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2/g, where 90% by volume of the particles have a size of less than 12.5 ?m and a D50 between 3 ?m and 6 ?m by volume measured by laser diffraction using Malvern laser diffraction particle size analyzer, where the particles have an average circularity of at least 0.85 determined by image analysis. The invention further relates to high density oil well cement slurry comprising water, Portland cement, a to weighting material and optionally silica flour, microsilica, fiber, rubbery particles a fluid loss addition and a retarder, where the weighting material is particulate microfine ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2/g, and where 90% by volume of the particles have a size of less than 12.Type: GrantFiled: November 21, 2011Date of Patent: February 24, 2015Assignee: Elkem ASInventors: Mohamed Al-Bagoury, Christopher Drysdale Steele
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Patent number: 8936675Abstract: The present invention relates to new precast cementitious products with photocatalytic activity, and to a process to obtain them.Type: GrantFiled: August 8, 2007Date of Patent: January 20, 2015Assignee: Italcementi S.p.A.Inventor: Roberta Alfani
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Patent number: 8888910Abstract: Disclosed are encapsulated zinc compounds, together with methods for preparing and use the same. Also disclosed are methods for mixing the encapsulated zinc mixtures with a cement, and the resulting concrete compositions.Type: GrantFiled: March 23, 2012Date of Patent: November 18, 2014Assignees: Board of Regents of the University of Texas System, Kansas State University Research FoundationInventors: Maria C. G. Juenger, Sarah Clare Taylor Lange, Kyle Riding
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Publication number: 20140238275Abstract: A cement composition comprises: cement; water; and an additive, wherein the additive is a pozzolan and a strength-retrogression inhibitor, and wherein a mixture consisting essentially of: the additive; water; and a source of calcium develops a compressive strength of at least 500 psi at a time of 24 hours, a temperature of 190° F., and a pressure of 3,000 psi. A method of cementing in a subterranean formation comprises: introducing the cement composition into the subterranean formation and allowing the cement composition to set. The compressive strength of the test cement composition consisting essentially of: the cement; the water; and the additive at a final time of 72 hours has a percent change greater than ?5% from the compressive strength of the test cement composition at an initial time of 24 hours when tested at a temperature of 300° F. and a pressure of 3,000 psi.Type: ApplicationFiled: May 8, 2014Publication date: August 28, 2014Applicant: Halliburton Energy Services, Inc.Inventors: Rahul C. PATIL, Ramesh MUTHUSAMY, Sheetal SINGH, Abhimanyu DESHPANDE
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Publication number: 20140230697Abstract: The present invention relates to a ternesite calcium sulfoaluminate clinker as well as a ternesite clinker containing 20 to 100% by weight of C5S2$ and less than 15% by weight of C4A3$, as well as the use of ternesite as an additive to calcium sulfoaluminate (ferrite) (belite) (CSA(F)(B)) clinker, calcium sulfoaluminate (ferrite) (belite) cement, and calcium sulfoaluminate (ferrite) (belite) binder containing 10 to 90% by weight of CSA(F)(B) and 90 to 10% by weight of ternesite.Type: ApplicationFiled: July 16, 2012Publication date: August 21, 2014Applicant: HEIDELBERGCEMENT AGInventors: Frank Bullerjahn, Dirk Schmitt, Mohsen Ben Haha, Barbara Batog, Maciej Zajac
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Publication number: 20140230696Abstract: The present invention relates to the production of ternesite clinkers containing 20 to 100% by weight C5S2$ and less than 15% by weight C4A3$, and to the use of ternesite as an additive to Portland cement or Portland composite cement, and to a binder containing 20 to 95% by weight Portland cement (clinker) and 80 to 5% by weight ternesite (clinker).Type: ApplicationFiled: July 16, 2012Publication date: August 21, 2014Applicant: HEIDELBERGCEMENT AGInventors: Frank Bullerjahn, Dirk Schmitt, Mohsen Ben Haha, Barbara Batog, Linda Irbe
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Publication number: 20140155302Abstract: The present invention relates to oil well drilling comprising a weighting agent consisting of microfine, particulate ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2/g, where 90% by volume of the particles have a size of less than 12.5 ?m and a D50 between 3 ?m and 6 ?m by volume measured by laser diffraction using Malvern laser diffraction particle size analyzer, where the particles have an average circularity of at least 0.85 determined by image analysis. The invention further relates to high density oil well cement slurry comprising water, Portland cement, a weighting material and optionally silica flour, microsilica, fiber, rubbery particles a fluid loss addition and a retarder, where the weighting material is particulate microfine ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2/g, and where 90% by volume of the particles have a size of less than 12.Type: ApplicationFiled: November 21, 2011Publication date: June 5, 2014Applicant: ELKEM ASInventors: Mohamed Al-Bagoury, Christopher Drysdale Steele
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Publication number: 20140137772Abstract: The present invention relates to a novel cement which makes possible the preparation of concrete, grout or mortar which is resistant to internal sulfate reactions and to external sulfate attacks, and also the use of this cement for the preparation of concrete, grout or mortar.Type: ApplicationFiled: November 24, 2011Publication date: May 22, 2014Inventor: Martine Pasquier
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Patent number: 8663820Abstract: The invention relates to a printed document of value having at least one authenticity feature in the form of a luminescent substance based on doped host lattices. The host lattice has a strong crystal field and is doped with at least one chromophore with the electron configuration (3d)2.Type: GrantFiled: March 5, 2002Date of Patent: March 4, 2014Assignee: Giesecke & Devrient GmbHInventors: Thomas Giering, Rainer Hoppe, Fritz Stahr
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Publication number: 20140054038Abstract: Well cement compositions comprise water, an inorganic cement and one or more fillers having a thermal expansion coefficient (CTE) that is lower than about 3×10?6/° C. The presence of low-CTE fillers may reduce cement-sheath shrinkage when the well temperature falls during stimulation treatments, cyclic steam injection or when the well temperature reaches equilibrium at the top of a long casing string.Type: ApplicationFiled: August 27, 2012Publication date: February 27, 2014Inventor: Simon Gareth James
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Patent number: 8652580Abstract: A manufacturing method of tiles includes the steps of: preparing mixed powder having a water content of 2 to 7% by mixing 30 to 80 parts by weight of calcium hydroxide powder or dolomite plaster powder, 20 to 70 parts by weight of porous aggregate, 0.1 to 5 parts by weight of a first photocatalyst and water; filling the mixed powder into a mold of a molding machine; forming a formed body by pressurizing the filled mixed powder; curing the formed body in a carbon dioxide atmosphere; and forming a thin layer made of a second photocatalyst on a surface of the formed body.Type: GrantFiled: January 28, 2010Date of Patent: February 18, 2014Assignee: Tagawasangyo Co., Ltd.Inventors: Nobuyoshi Yukihira, Tetsuro Oike, Katsuyuki Nakano
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Patent number: 8641819Abstract: A cement composition, and a process for producing a cement composition, wherein the cement composition has the Sr content of 0.065 mass % to 1.0 mass % and the MgO content of greater than 1.0 mass % to 3.0 mass %. The process for producing a cement composition comprises a step (A) of adjusting the basic raw material units of raw materials selected from the group consisting of limestone, silica stone, coal ash, clay, blast furnace slag, soil generated by construction work, sewage sludge, hydrocake and iron sources so that the cement composition has the Sr content of 0.065 mass % to 1.0 mass % and the MgO content of greater than 1.0 mass % to 3.0 mass %, blending the adjusted raw materials and burning to produce cement clinker, and a step (B) of mixing the cement clinker with gypsum and an admixture of limestone and blast furnace slag followed by grinding.Type: GrantFiled: May 24, 2011Date of Patent: February 4, 2014Assignee: UBE Industries, Ltd.Inventors: Norihiko Sawabe, Hitoshi Tonokohchi, Takayasu Itoh, Hiroshi Mikami
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Publication number: 20130255948Abstract: Well-cementing compositions for use in high-pressure, high-temperature (HPHT) wells are often densified, and contain weighting agents such as hematite, ilmenite, barite and hausmannite. The weighting agents are usually finely divided to help keep them suspended in the cement slurry. At high temperatures, finely divided weighting agents based on metal oxides react with the calcium-silicate-hydrate binder in set Portland, cement, leading to cement deterioration. Finely divided weighting agents based on metal sulfates are inert with respect to calcium silicate hydrate; consequently, set-cement stability is preserved.Type: ApplicationFiled: December 7, 2011Publication date: October 3, 2013Inventors: Michel Michaux, Laurent Gabilly
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Publication number: 20130119576Abstract: The invention comprises a method of making a cement-based object or structure having a compressive strength greater than about 1,000 psi. The method comprises placing a cement-based material in an insulated concrete form, wherein the insulated concrete form has an R-value of at least 1.5, wherein the cement-based material comprises approximately 10% to approximately 80% by weight portland cement, and at least one of approximately 10% to approximately 90% by weight slag cement and approximately 5% to approximately 80% by weight fly ash. The invention also comprises a method of making a cement-based object or structure. The invention further comprises objects or structures made by the foregoing methods.Type: ApplicationFiled: September 25, 2012Publication date: May 16, 2013Inventor: Romeo Ilarian Ciuperca
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Patent number: 8420181Abstract: Disclosed is a method for producing a polymer-based microfluidic device, including: forming a microstructure on a lower polymer matrix; coating the lower polymer matrix with TiO2 to perform patterning of TiO2; bonding the lower polymer matrix with an upper polymer matrix; and radiating UV lights thereto to convert TiO2-coated regions into hydrophilic regions. Disclosed also is a polymer-based microfluidic device obtained by the method. The method enables development of a microfluidic device having high stability and long-term durability.Type: GrantFiled: January 31, 2011Date of Patent: April 16, 2013Assignee: Korea Institute of Science and TechnologyInventor: Sang Kyung Kim
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Patent number: 8377579Abstract: There is described a cement composition, based on hydraulic binders, adapted to obtain coatings with a high photocatalytic activity and improved rheologic characteristics, including a hydraulic binder, a polycarboxylic or acrylic superfluidifying agent, a cellulosic ether with a viscosity in the range between 10000 and 120000 mPa·s, an adhesive agent, a calcareous, silicic or silicic-calcareous filler and a photocatalyst.Type: GrantFiled: July 24, 2008Date of Patent: February 19, 2013Assignee: Italcementi S.p.A.Inventor: Roberta Alfani
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Patent number: 8361221Abstract: The invention relates to an additive for reducing Cr(VI) ions to Cr(III) ions, comprising a complex of tin(II) and a carboxylic acid or a salt thereof, and to the process for the preparation thereof. It also relates to a process for preparing a material having a low chromium(VI) content. Finally, it relates to the use of said additive for reducing chromium(VI) ions to chromium(III) ions.Type: GrantFiled: July 6, 2009Date of Patent: January 29, 2013Assignee: ChrysoInventors: Pierre-Antoine Andreani, Bruno Pellerin, Karen Ayme
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Patent number: 8273175Abstract: PVC compositions, concrete composition including the PVC compositions, and reinforced concrete structures that contain the concrete compositions are described. Methods for manufacturing the reinforced concrete structures of the present technology, methods for repairing reinforced concrete structures having corroded rebar, and methods for reducing rebar corrosion in reinforced concrete structures are also described.Type: GrantFiled: January 26, 2011Date of Patent: September 25, 2012Assignee: Empire Technology Development, LLCInventor: Sung-Wei Chen
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Patent number: 8236101Abstract: A method for preparing swimming pool plaster includes the addition of titanium dioxide (TiO2) to white swimming pool plaster mixture to improve the appearance of the plaster and reduce or eliminate mottling. Approximately two pounds of TiO2 is added per sack of cement. For example, approximately ten pounds of TiO2 may be added to a 5/7 bag mix of cement and pool sand. The TiO2 is added to water in a mixer in a first step, and the TiO2 and water are mixed dissolving the TiO2 in the water before adding cement or pool sand, thereby providing better mixing of all of the ingredients.Type: GrantFiled: April 21, 2011Date of Patent: August 7, 2012Inventor: LeRoy Juarez
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Publication number: 20120152541Abstract: Well-cementing compositions for use in high-pressure, high-temperature (HPHT) wells are often densified, and contain weighting agents such as hematite, ilmenite, barite and hausmannite. The weighting agents are usually finely divided to help keep them suspended in the cement slurry. At high temperatures, finely divided weighting agents based on metal oxides react with the calcium-silicate-hydrate binder in set Portland cement, leading to cement deterioration. Finely divided weighting agents based on metal sulfates are inert with respect to calcium silicate hydrate; consequently, set-cement stability is preserved.Type: ApplicationFiled: December 4, 2011Publication date: June 21, 2012Inventors: Laurent Gabilly, Michel Michaux
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Patent number: 8172938Abstract: A silica cement blend having an insulating, fire retarding and high temperature characteristic capable of withstanding temperatures ranging from ambient to greater than 40000 F without degradation of the concrete structure. In addition to its high temperature capabilities the blend can be produced as ultra light weight to heavy weight concrete. The silica based mixture when added to cementitious materials such as Portland cement, Class C Fly Ash, silica fume and other cementitious materials. Presented also are methods for reducing fire damage by coating interior/exterior walls, ceiling, and roofs of a building with a water based latex coating containing a fire retardant material and low heat conductivity silicas. Methods for painting internal/external walls, ceilings, and roof are also presented.Type: GrantFiled: June 30, 2009Date of Patent: May 8, 2012Assignee: Specialty Concrete Design, Inc.Inventors: John Alright, David Wayne Taylor
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Publication number: 20120085265Abstract: 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 SO3 in the product of step (ii) and eliminating the product having a ratio of quantity of SO3 of the decarbonated raw meal/quantity of SO3 in the product of step (ii) less than or equal to 0.75 and greater than or equal to 1.2; (v) measuring the quantity of free lime (CaOl) in the product of step (ii) and eliminating the product having a quantity of free lime strictly greater than 1.5%, percentage by mass of free lime in the product of step (ii).Type: ApplicationFiled: June 7, 2010Publication date: April 12, 2012Applicant: LAFARGEInventors: Gunther Walenta, Cédric Comparet, Vincent Morin
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Patent number: 8142564Abstract: 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.Type: GrantFiled: May 6, 2008Date of Patent: March 27, 2012Assignee: LafargeInventors: Hélène Debegnac, Christelle Sing
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Patent number: 8092586Abstract: Described herein is a photocatalytic composite comprising a titanium dioxide supported on metakaolin. In comparison to known embodiments of the sector, the composite of the present invention makes it possible to obtain binders and derived products with high photocatalytic efficiency, even when using photocatalyst quantities which are lesser than those present in products of prior technical art.Type: GrantFiled: December 17, 2008Date of Patent: January 10, 2012Assignee: Italcementi S.p.A.Inventors: Renato Ancora, Massimo Borsa, Luigi Cassar
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Publication number: 20120000395Abstract: In a method for producing photocatalytically active clinker, TiO2-containing materials are reacted to calcium titanates, particularly CaTiO3, with clinker raw meal or clinker raw mix.Type: ApplicationFiled: December 15, 2009Publication date: January 5, 2012Applicant: Holcim Technology Ltd.Inventors: Shreesh Anant Khadilkar, Manish Vasant Karandikar, Pradeep Gopal Lele
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Patent number: 8083851Abstract: Efficient antimicrobial additives are provided comprising a wettable, cake-forming inorganic material having dispersed therein an inorganic or organometallic antimicrobial agent capable of releasing antimicrobial metal ions. These antimicrobial additives are especially effective for use in cements, mortars and cementitious compositions.Type: GrantFiled: December 29, 2006Date of Patent: December 27, 2011Assignee: Sciessent LLCInventors: Joseph J. Crudden, Joseph V. Lazzaro, Edward K. Welch, II
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Patent number: 7972434Abstract: Ceramic precursor compositions and chemically bonded ceramic (CBC) materials, especially Ca-based, and a composite biomaterial suitable for orthopaedic applications. The CBC-system includes a binding phase (chemical cement) and additional phases with specified chemistry imparting to the biomaterial the ability of initial strength followed by interaction with the body tissue including body liquid, to form a resorbable or partly resorbable biomaterial. The ceramic precursor composition includes at least one silicate with Ca as the main cation with a resorption rate less or equal to that of the bone in-growth rate. The silicate will form the binding phase of the cured material. Implants and surface coated devices are also disclosed. The cured material exhibits a compressive strength exceeding 100 MPa.Type: GrantFiled: April 3, 2009Date of Patent: July 5, 2011Assignee: Doxa ABInventors: Hakan Engqvist, Leif Hermansson
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Patent number: 7960042Abstract: Paving blocks for photocatalytic paving comprising at least a base layer in cementitious material and a surface layer based on a cementitious composition comprising: at least a hydraulic binder, a photocatalyst capable of oxidizing organic and inorganic polluting substances present in the environment in the presence of environmental light, air and humidity, at least an aggregate, water and, optionally, a water reducing additive.Type: GrantFiled: February 18, 2004Date of Patent: June 14, 2011Assignee: Italcementi S.p.A.Inventors: Luigi Cassar, Roberto Cucitore, Carmine Pepe
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Patent number: 7901506Abstract: In this invention a cementitious capillary crystalline waterproof material with an eka-molecular sieve structure and its manufacturing method is disclosed. The major ingredient of this material is Portland cement; the accessories include silicon dioxide, alumina, magnesia, calcium sulphonate, methlycellulose, quick-setting agent and sodium aluminate, etc. Put separately major ingredient and accessories premixed in given proportion separately into the major ingredient bin and the accessory bins. The major ingredient passing through an impulse flowmeter is carried to the dosing machine; and in the same time, the premixed accessories are automatically weighed by the weighing device using gewichtsabnahme method when they are carried to the above dosing machine; they are mixed in the premixing machine and the refine-mixing machine and prepared to the product. The product is mixed with water and forms slurry.Type: GrantFiled: June 2, 2008Date of Patent: March 8, 2011Inventor: Huidong Zhang
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Patent number: 7892352Abstract: Disclosed embodiments relate to well treatment fluids and methods that utilize nano-particles. Exemplary nano-particles are selected from the group consisting of particulate nano-silica, nano-alumina, nano-zinc oxide, nano-boron, nano-iron oxide, and combinations thereof. Embodiments also relate to methods of cementing that include the use of nano-particles. An exemplary method of cementing comprises introducing a cement composition into a subterranean formation, wherein the cement composition comprises cement, water and a particulate nano-silica. Embodiments also relate to use of nano-particles in drilling fluids, completion fluids, simulation fluids, and well clean-up fluids.Type: GrantFiled: April 20, 2009Date of Patent: February 22, 2011Assignee: Halliburton Energy Services. Inc.Inventors: Craig W. Roddy, Jiten Chatterji, Roger Cromwell
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Patent number: 7892342Abstract: A white, substantially non-iron containing dental material formed from Portland cement. The material may be a dental cement, dental restorative or the like.Type: GrantFiled: August 27, 2009Date of Patent: February 22, 2011Assignee: DENTSPLY International, Inc.Inventor: Carolyn M. Primus
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Patent number: 7824322Abstract: An industrial waste byproduct from a titanium metal or a titanium dioxide production process can be utilized as a partial cement replacement. In some embodiments, the byproduct can comprise a byproduct from the production of titanium dioxide pigment from a sulphate process or from a chloride process. The cement can be used to make concrete and other cementitious material products for structural and non-structural uses, for example, grout, mortar, gunite, stucco, masonry, decorative stonework, bricks, blocks, roof tiles, floor tiles, cobblestones, pavers, combinations thereof, and the like.Type: GrantFiled: April 28, 2010Date of Patent: November 2, 2010Assignee: The National Titanium Dioxide, Co. Ltd. (Cristal)Inventors: Tarek H. Almusallam, Mohammad Iqbal Khan, Yousef Saleh Al-Zeghayer, Waheed Atia Al-Masry, Fadi Mohamed Trabzuni
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Patent number: 7819970Abstract: Provided is a protective concrete for weaken the intensity of proton radiation, and it is prepared by mixing 525# cement 500-700 Kg; barite sand 1000-1400 kg, barite stone 1500-1800 Kg, lead powder 180-200 Kg and water 170-180 Kg. The barite that can absorb the proton radiation is used, so the present concrete is much better than conventional concretes in weakening the proton radiation, and 1.5 m-thick wall without lead plates which is prepared with the present concrete can achieve the same effect on weakening the proton radiation with a conventional 2 m-thick wall covering with lead plates.Type: GrantFiled: July 20, 2007Date of Patent: October 26, 2010Inventors: Yingzhi Lv, Yingren Lv, Yan Lv, Qiang Lv, Yongsheng Gao
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Patent number: 7799127Abstract: Rapid repair and retrofit of existing infrastructures demand durable high early strength materials that not only deliver sufficient strength within a few hours of placement but also significantly prolong the maintenance interval. The invention comprises a class of newly developed polyvinyl alcohol (PVA) fiber-reinforced high early strength engineered cementitious composites (ECC) materials featuring extraordinary ductility. The tailoring of preexisting flaw size distribution through non-matrix interactive crack initiators in the composite matrix results in high tensile ductility. The resulting high early strength ECC materials are capable of delivering a compressive strength of 21 MPa (3.0 ksi) within 4 hours after placement and retaining long-term tensile strain capacity above 2%.Type: GrantFiled: February 9, 2007Date of Patent: September 21, 2010Assignee: The Regents of the University of MichiganInventors: Victor C. Li, Shuxin Wang
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Publication number: 20100175588Abstract: Cement compositions and methods for making cement compositions are provided. The cement compositions can comprise at least one oxide having a particle size of less than about 600 nm.Type: ApplicationFiled: February 26, 2008Publication date: July 15, 2010Applicants: TATA CHEMICALS LIMITED, NANODYNAMICS, INC.Inventors: Richard J. Schorr, Suvankar Sengupta, Richard L. Helferich, Gary M. Gordon, Debabrata Rautaray
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Patent number: 7717999Abstract: An industrial waste byproduct from a titanium metal or a titanium dioxide production process can be utilized as a partial cement replacement. In some embodiments, the byproduct can comprise a byproduct from the production of titanium dioxide pigment from a sulphate process or from a chloride process. The cement can be used to make concrete and other cementitious material products for structural and non-structural uses, for example, grout, mortar, gunite, stucco, masonry, decorative stonework, bricks, blocks, roof tiles, floor tiles, cobblestones, pavers, combinations thereof, and the like.Type: GrantFiled: December 24, 2008Date of Patent: May 18, 2010Assignee: The National Titanium Dioxide, Co., Ltd. (CRISTAL)Inventors: Tarek H. Almusallam, Mohammad Iqbal Khan, Yousef Saleh Al-Zeghayer, Waheed Atia Al-Masry, Fadi Mohamed Trabzuni
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Patent number: 7678192Abstract: A method of solidifying and detoxifying a soil, incinerated ash and coal ash to yield a solidified substance detoxified to a level complying with the environmental standards and a method of detoxifying polluted water containing dioxins and polluted water containing PCB are provided. First solidifying and detoxifying agent contains light burnt magnesite as component (1) and chrysolite powder as component (2), in which a ratio by weight of the component (1) and the component (2) is 1:5 to 5:1, preferably 1:3 to 3:1, more preferably 1:2 to 2:1 and is the solidifying and detoxifying agent applied to one kind selected from soil, incinerated ash and coal ash as well as polluted water containing dioxins and polluted water containing PCB. Other solidifying and detoxifying agent further contains as an additional component a fused phosphate fertilizer and titanium dioxide powder as well as anhydrous gypsum powder, light burnt dolomite and/or calcined lime powder.Type: GrantFiled: May 2, 2008Date of Patent: March 16, 2010Inventors: Kikuo Okada, Takeo Nishiura
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Patent number: 7625442Abstract: The invention relates to a kit of parts consisting of: a) a material for producing a shaped body; b) a metal powder, a powder of a metal alloy, a powder of a pigment having a metallic effect or a powder having a laminar structure, and; c) if needed, of customary additives. The inventive kit of parts can be used to produce shaped bodies, especially in the field of dentistry, which can be excellently detected by optical systems.Type: GrantFiled: August 3, 2001Date of Patent: December 1, 2009Assignees: S & C Polymer Silicon- und Composite-Spezialitäten GmbH, R-Dental Dentalerzeugnisse GmbHInventors: Juergen Engelbrecht, Wolfram Ziegler, Andreas Sprafke
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Patent number: 7601328Abstract: The invention relates to a hydroxide aqueous suspension of at least one selected transition element of which the potential oxidation reduction is less than that of the pair CrO72?/CrO42? (?0.12 V) having a pH between 2 and 11, limits excluded, for reducing the content of chrome VI of cement to a value no greater than 2 ppm. The suspension is characterized in that it contains 0.5 to 80% by wt. of dry material of hydroxide of at least one transition element with regard to the quantity of water and in that it is stabilized by a hydrosoluble stabilizer. This suspension makes it possible to reduce the content of chrome VI of cements to a value no greater than 2 ppm.Type: GrantFiled: August 6, 2004Date of Patent: October 13, 2009Assignee: ChrysoInventors: Jean-Philippe Perez, Olivier Malbault, Martin Mosquet
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Patent number: 7556683Abstract: The photocatalytic granular mixture for mortar and concrete includes a photocatalyst in the form of at least two granular classes with different B.E.T. specific surfaces. It has a photocatalytic activity greater than that of a monodisperse photocatalyst with a single range of B.E.T. specific surface, and thus permits, in association with a conventional hydraulic binder, to obtain construction and repair materials whose aptitude for self cleaning, for the reduction of odors, and for the depollution of ambient air, is considerably improved.Type: GrantFiled: October 3, 2007Date of Patent: July 7, 2009Assignee: Ciments FrancaisInventors: Laurent Bonafous, Luigi Cassar, Pierre Cassat, Pierre Colombet, Francine Colombet, legal representative, Laurent Guillot
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Patent number: 7531035Abstract: Ceramic precursor compositions and chemically bonded ceramic (CBC) materials, especially Ca-based, and a composite biomaterial suitable for orthopaedic applications. The CBC-system includes a binding phase (chemical cement) and additional phases with specified chemistry imparting to the biomaterial the ability of initial strength followed by interaction with the body tissue including body liquid, to form a resorbable or partly resorbable biomaterial. The ceramic precursor composition includes at least one silicate with Ca as the main cation with a resorption rate less or equal to that of the bone in-growth rate. The silicate will form the binding phase of the cured material. Implants and surface coated devices are also disclosed. The cured material exhibits a compressive strength exceeding 100 MPa.Type: GrantFiled: September 12, 2005Date of Patent: May 12, 2009Assignee: Doxa ABInventors: Leif Hermansson, Håkan Engqvist
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Publication number: 20090020727Abstract: Magnetic receptive Paints and coatings have been developed to allow one to paint a wall with this coating and apply magnets to this surface. The further development of magnetic receptive compounds lends itself to creating a one step process where one applies a magnetic receptive plaster or compound to a wall with a viscosity sufficient to smooth with a trowel leaving a magnetic receptive surface. In other applications one could spray a compound on a given surface.Type: ApplicationFiled: April 28, 2005Publication date: January 22, 2009Inventor: Dayton Joseph Deetz
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Publication number: 20080250980Abstract: In order to also be able to economically use iron ore dust which is created by the extraction and preparation of iron ore and has not been usable until now, the invention proposes an agglomerated stone comprising (in wt. %) 6-15% of a cement binding agent, up to 20% of a carbon carrier, up to 20% of residual and recyclable substances, optionally up to 10% of a coagulation and solidification accelerator and the remainder consisting of iron ore in a stone format in the form of particles having a particle size of less than 3 mm as well as possessing after three days an initial strength of at least 5 N/mm2 and after 28 days a cold compression strength of at least 20 N/mm2. As a result of the particular hardness St and form stability thereof even at high temperatures T, agglomerated stones according to the invention are especially suitable for use in shaft, corex or blast furnaces. The invention also relates to a method for producing agglomerated stones according to the invention.Type: ApplicationFiled: May 25, 2005Publication date: October 16, 2008Inventors: Horst Mittelstadt, Stefan Wlenstoer, Reinhard Fusenig, Ronald Erdmann, Klaus Kesseler, Matthias Rohmann
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Publication number: 20080156232Abstract: Efficient antimicrobial additives are provided comprising a wettable, cake-forming inorganic material having dispersed therein an inorganic or organometallic antimicrobial agent capable of releasing antimicrobial metal ions. These antimicrobial additives are especially effective for use in cements, mortars and cementitious compositions.Type: ApplicationFiled: December 29, 2006Publication date: July 3, 2008Inventors: Joseph J. Crudden, Joseph V. Lazzaro, Edward K. Welch
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Patent number: 7393406Abstract: The present invention provides methods and compounds for the in situ formation in concrete of chloride sequestering compounds that resist corrosion of metals contained within the concrete. These chloride sequestering compounds may include, but are not limited to, compounds having the formula 3CaO.Fe(2-x)AlxO3.Ca(NO2)2.nH2O and 3CaO.Fe(2-x)AlxO3.Ca(NO3)2.nH2O, where x ranges from about 0 to 1.4 and n ranges from about 8 to 24. In one embodiment, at least one Fe-containing additive is introduced into cement, and at least one anion-containing additive is introduced into mixing water. When the cement and mixing water are combined to create fresh concrete, the additives react to form chloride sequestering compounds. In another embodiment, the additives are introduced or mixed directly into fresh concrete that has already been formed, where they react to create chloride-sequestering compounds. “In situ” formation refers to the creation of a chloride sequestering compound within concrete.Type: GrantFiled: March 11, 2005Date of Patent: July 1, 2008Inventor: Paul W. Brown