With Other Cement Material (e.g., Portland, Calcium Sulfate, Etc.) Patents (Class 106/695)
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Patent number: 5693137Abstract: A cementitious mixture includes hydraulic cement, fly ash, and an effective amount of unfired nature finely divided material, such as a clay, containing at least about 35% alumina, to accelerate the early strength of a mix. A method of accelerating early strength in a cementitious mix comprises the adding of alumina in the form of an unfired raw material, such as clay, in an effective amount in such mix.Type: GrantFiled: November 29, 1995Date of Patent: December 2, 1997Assignee: JTM Industries, Inc.Inventor: Robert W. Styron
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Patent number: 5626663Abstract: A concrete composition capable of inhibiting shrinkage of structural concrete structures is disclosed. The concrete is formed with an admixture composed of at least one secondary/tertiary alkanediol.Type: GrantFiled: August 23, 1995Date of Patent: May 6, 1997Assignee: W. R. Grace & Co.-Conn.Inventors: Neal S. Berke, Michael P. Dallaire, Awdhoot V. Kerkar
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Patent number: 5624489Abstract: Additives for high alumina cement compositions are proposed. The additives are effective to reduce or prevent the deleterious conversion of hexagonal calcium aluminate hydrates to cubic hydrogarnet in the high alumina cement compositions. The additives comprise 80-99 wt. % of a siliceous pozzolan and 1-20 wt. % of an inorganic sodium or potassium salt.Type: GrantFiled: January 23, 1995Date of Patent: April 29, 1997Assignee: National Research Council of CanadaInventors: Yan Fu, Jian Ding, James J. Beaudoin
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Patent number: 5569324Abstract: The present invention provides improved cementitious compositions which can include drilling fluid as a component thereof and methods of cementing wells utilizing such compositions. The compositions are basically comprised of a cementitious material, water, a hardenable resinous material and optionally, drilling fluid in an amount up to about 70% by volume of the cementitious material in the composition.Type: GrantFiled: June 2, 1995Date of Patent: October 29, 1996Assignee: Halliburton CompanyInventors: Patty L. Totten, Bobby J. King, Jiten Chatterji
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Patent number: 5556578Abstract: Sprayable fireproofing compositions for structural members such as steel columns are provided. The compositions comprise a cementitious binder such as Portland cement, and a hard aggregate containing water of hydration. Such hard aggregates contribute not only to the strength of the fireproofing composition, but also contribute thermally. The product is produced by dry blending a mixture of the cementitious binder and hard aggregate, as well as other optional additives. Upon the addition of water, sprayable slurries are formed which can be pumped to the point of application. An accelerator is added in close proximity to the point of injection. Other additives may also be included, such as starch, adhesives and cement strength enhancers. The slurries adhere to the structural member in the slurried state and after setting to provide excellent fire and heat protection.Type: GrantFiled: December 23, 1993Date of Patent: September 17, 1996Assignee: W. R. Grace & Co.-Conn.Inventors: Philip L. Berneburg, Antone J. Freitas, Ralph Pisaturo
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Inorganic coating composition having high-heat-resisting, anti-rusting and anti-corrosive properties
Patent number: 5466280Abstract: An inorganic coating composition has a curable powder which contains a hydraulic calcium aluminate compound, a metallic oxide reinforcing agent and a pigment, and a binder solution which contains an alkali-metal silicate solution and a soluble phosphate.Type: GrantFiled: February 24, 1994Date of Patent: November 14, 1995Inventors: Chwen-Chern Lee, Show-Wei Lee -
Patent number: 5454866Abstract: This invention relates to a grout composition comprising a Portland cement, a high alumina cement, anhydrous calcium sulphate, an effective amount of a lithium salt and an effective amount of a strong base. According to another aspect of the invention, instead of using a strong base directly in the grout composition, a first compound and a second compound is added to the grout composition which in use react to form an effective amount of a strong base when the grout composition is mixed with water.Type: GrantFiled: February 7, 1995Date of Patent: October 3, 1995Assignee: H L & H Timber Products (Pty) Ltd.Inventors: Gregory M. Gilbert, Mark Howell, Terrence M. McConnachie, Paul S. Kirsten
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Patent number: 5431730Abstract: A mortar composition based on aluminous cement which provides an attractive ceramic tile-like surface gloss and other desirable properties including superb hardness, reduced water absorption, high strength, high acid resistance, and good heat and weather resistance, is disclosed. Also disclosed is a molded article of manufacture which comprises the mortar composition, as well as fiber-reinforced mortar compositions and molded articles of manufacture made therefrom.Type: GrantFiled: November 19, 1993Date of Patent: July 11, 1995Inventor: Jiro Fujimasu
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Patent number: 5424099Abstract: The invention relates to a gypsum-based cementitious composition capable of upon mixing with fine aggregate in a weight ratio to said gypsum-based cementitious composition of from about 1.25:1 to 2.5:1; and sufficient water to provide a pumpable, self-leveling wet gypsum-based cementitious composition having a flowability such that the wet gypsum-based cementitious composition completely self-levels to produce a topographically smooth surface without floating or finishing, providing, upon hardening, a sub-floor resistant to delamination from its substrate having a dust-free surface and compressive strength in the range of about 2500 to 6000 psi. The invention further relates to methods for making floor underlayments using these compositions, and for making the compositions.Type: GrantFiled: March 12, 1993Date of Patent: June 13, 1995Assignee: W.R. Grace & Co.-Conn.Inventors: Gary D. Stewart, Philip M. Carkner
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Patent number: 5366549Abstract: A method is provided for making a fiber-reinforced slag gypsum cement lightweight hardened product. The method consists essentially of mixing (1) from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 .mu.m to (2) 100 parts by weight of a mixture which comprises 100 parts by weight of Portland cement, (3) from 20 to 350 parts by weight of slag fine powder which has a fineness ranging from 6,000 to 12,000 cm.sup.2 /g as Blaine's specific surface area, (4) from 0 to 20 parts by weight of lime, (5) from 20 to 100 parts by weight of calcium aluminate and gypsum fine powder, (6) 0.01 to 1.5 parts of a setting retardant; mixing water, prefoamed foams and reinforcing fibers with the mixture to obtain a slurry; subjecting the slurry to molding to obtain a molded product; removing the molded product to obtain a hardened product; and curing the hardened product with steam.Type: GrantFiled: March 24, 1994Date of Patent: November 22, 1994Assignees: Kyowa Giken Co., Ltd., Takeda Chemical Industries, Ltd., Dai-Ichi Cement Co., Ltd., Naigai Technos Corporation, Obayashi CorporationInventors: Shokichi Imaizumi, Tsuyoshi Aoyama, Nagao Hori, Katsumi Takenami, Kiyoshi Koibuchi, Youich Ishikawa, Seiji Kazama, Koji Nasu
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Patent number: 5362320Abstract: A polymer modified cement, low shrinkage mortar patching and/or coating compound that can be sanded after drying and has the consistency of drywall compound for coating, patching or taping drywall, plaster, stucco, concrete or wood surfaces.Type: GrantFiled: September 13, 1993Date of Patent: November 8, 1994Inventor: Burton K. Whatcott
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Patent number: 5360841Abstract: The addition of ethylene oxide/propylene oxide block copolymers containing 5 to 35 weight % of ethylene oxy groups and molar masses of the propylene glycol block between 1500 and 3000 to dry, hydraulic binder materials results in reduced dust formation, improved wettability, and enhanced flow properties of these materials when they are mixed with water.Type: GrantFiled: December 20, 1991Date of Patent: November 1, 1994Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Bernhard Knop, Horst Tamm, Gerhard Walter
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Patent number: 5328507Abstract: A light weight cementitious composition comprising a dry mixture of a hydraulic cement component and an aggregate component and which, upon mixing with water, produces a paste which is easily workable and sets to produce a light weight concrete mass. The hydraulic cement component includes at least two and usually three cement constituents. One constituent is a Type S, Type M or Type N masonry cement. A second constituent is a pozzolanic cement or an expansive cement, and a third constituent is a Type I cement, Type II cement or a Type III portland cement. In this mixture the first and second cement constituents are each present in an amount less than the third cement constituent. The second aggregate component in the dry mixture comprises a light weight aggregate present in an amount to provide a bulk density for the dry mixture of no more than 100 pounds per cubic foot and more specifically, a bulk density of about 85 pounds per cubic foot, or less.Type: GrantFiled: September 23, 1992Date of Patent: July 12, 1994Assignee: Texas Industries, Inc.Inventor: David A. Crocker
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Patent number: 5234497Abstract: A fast setting cementitious composition which upon hydration with water forms a paste-like slurry useful in stopping leaks in the walls of cement pipes. The cementitious composition comprises a dry mixture of a hydraulic cement component having a first Portland cement constituent and a second calcium aluminate constituent, an aggregate component and a lime component. Upon hydration with 23 wt. % water, the resulting slurry has an initial Vicat setting time within the range of 1-5 minutes and a final Vicat setting time of no more than 6 minutes. The cement component contains the first and second cement constituents in weight ratios within the range of 3:2-2:3. The lime component is present in an amount within the range of 1-4 wt. %.In effecting the repair of a water leak, a paste-like slurry is formed from water and the dry cementitious composition. The cementitious paste is supplied to the repair site.Type: GrantFiled: June 25, 1990Date of Patent: August 10, 1993Assignee: Texas Industries, Inc.Inventor: David A. Crocker
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Patent number: 5212126Abstract: A monolithic refractory with improved resistance to molten aluminum and a method of imparting the resistance by adding 0.2 to 1 wt.% polyvinyl chloride powder to the base mix.Type: GrantFiled: June 10, 1991Date of Patent: May 18, 1993Assignee: Dresser Industries, Inc.Inventors: Lawrence D. Fitch, Thomas R. Kleeb
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Patent number: 5160376Abstract: The present invention provides a cement setting accelerator comprising 100 parts by weight of a sintered body, 5 to 70 parts by weight of an alkali metal carbonate powder and at most 170 parts by weight of a lime powder and a method of manufacturing the same. The sintered body contains a predetermined ratio of 3CaO.2Na.sub.2 O.5Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and Na.sub.2 O.Al.sub.2 O.sub.3. Alternatively, a predetermined ratio of 3CaO.2Na.sub.2 O.5Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and 4CaO.3Al.sub.2 O.sub.3.SO.sub.3 are contained in the sintered body. Further, a raw material mixture, which is not sintered and equal in the chemical composition to the sintered body noted above, may be used in place of the sintered body. Setting and hardening of a cement paste is markedly promoted by adding a small amount of the cement setting accelerator of the present invention to the cement paste.Type: GrantFiled: October 15, 1990Date of Patent: November 3, 1992Assignee: Onoda Cement Co., Ltd.Inventors: Masatsune Kikuchi, Hiroshi Omori, Hatsutoshi Hosoda, Susumu Kouda
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Patent number: 5151203Abstract: A composition for and method of performing primary cementing operations is disclosed. The method comprises the use of a water slurry of a thixotropic cementing composition which rapidly develops sufficient static gel strength to reduce if not eliminate annular gas migration.Type: GrantFiled: June 21, 1991Date of Patent: September 29, 1992Assignee: Halliburton CompanyInventors: Wendell D. Riley, Jerry D. Childs
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Patent number: 5133806Abstract: There is disclosed a softy mud solidifying agent which comprises cement, and at least two members selected from the group consisting of pozzolanic substances, inorganic compounds and organic compounds. The solidifying agent is capable of solidifying dredged earth, sand, softy mud, etc. in such a manner that their mixture can be re-cast into water to form submerged banks, artificial fish-gathering places, etc., without causing water pollution.Type: GrantFiled: January 6, 1992Date of Patent: July 28, 1992Assignees: Fujita Corporation, Onoda Chemico Co., Ltd.Inventors: Hiroyuki Sakamoto, Masao Sagara, Masao Shimoda, Kitsugi Kyoichi
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Patent number: 5114487Abstract: A cementitious composition comprises a ground sulfoaluminous clinker, a ground Portland cement clinker (preferably rapid hardening Portland cement clinker), calcium sulfate, aggregate (especially sand and a coarse aggregate such as granite) and metal (e.g. stainless steel) fibers. The composition may also comprise a plasticizer and agents for controlling setting and hardening. The reinforced concrete produced from the compositions is useful in offshore applications, e.g. as a coating for the weld areas between lengths of steel pipe to be laid under water.Type: GrantFiled: January 25, 1991Date of Patent: May 19, 1992Assignee: Blue Circle Industries PLC and ALH Systems LimitedInventors: Gavin C. Gartshore, Norman E. Holme
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Patent number: 5096497Abstract: A hardened cement is prepared by mixing together two slurries, one comprising water and a cement component and the other comprising water, beta anhydrite and calcium oxide and or calcium hydroxide. According to the invention the cement component of the first slurry comprises ferrite and C.sub.12 A.sub.7 or A.sub.7 A--CX.sub.2 (where X is a halogen atom) and a reactive source of silica.Type: GrantFiled: July 18, 1990Date of Patent: March 17, 1992Assignee: Fosroc International LimitedInventors: James Beale, Peter S. Mills
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Patent number: 5073197Abstract: The advantages of high alumina cement (early strength, resistance to sulphate attack) are preserved and its disadvantage (weakens with age) is solved by mixing it 50:50 with silica fume, gasifier slag, fly ash or other pozzolanic or latently hydraulic material. This encourages formation of gehlenite octahydrate in preference to the harmful `conversion` (weakening) reaction.Type: GrantFiled: August 3, 1989Date of Patent: December 17, 1991Assignee: National Research Development CorporationInventors: Amalendu J. Majumdar, Bahadur Singh
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Patent number: 5071484Abstract: A cementitious composition capable of forming an early high strength cement when admixed with a liquid comprising a cementitious material of a specific chemical composition, surface area, and particle size distribution, the method of making such cementitious composition, and cements comprising said composition.Type: GrantFiled: September 14, 1990Date of Patent: December 10, 1991Assignee: Capitol Aggregates, Inc.Inventors: Wesley E. Bonifay, John G. Wheeler, Jose G. Garcia
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Patent number: 5030282Abstract: A carbon fiber-reinforced cementitious composite having high strength, which comprises continuous carbon fibers and a cured cement composition, comprising cement particles having an average particle size up to about the average diameter of the carbon fibers, the cured cement composition being substantially interposed between the individual carbon fibers; and a method for producing it.Type: GrantFiled: July 10, 1989Date of Patent: July 9, 1991Assignees: Toho Rayon Co., Ltd., Taisei CorporationInventors: Toshikazu Matsuhashi, Kuniomi Suzuki, Kazuhisa Saito, Hiroyasu Ogawa, Masahide Aga, Teruo Yamamiya, Kenji Sugimoto, Yutaka Tsuruta
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Patent number: 4992103Abstract: A dry composition comprising an aluminous cement and a calcium sulphate, and preferably an accelerator and a water soluble fluoride may be reacted with water in a wide range of proportions to form a rapid setting material which develops high compressive strength.Type: GrantFiled: October 18, 1989Date of Patent: February 12, 1991Assignee: Fosroc International LimitedInventor: Roderick M. Smart
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Patent number: 4983220Abstract: The present invention concerns a method and a composition for accelerating the setting of Portland cement, shortening the migration phase of calcium ions into the liquid phase and complexing the lime of the Portland cement, whereby the said composition is essentially formed from the following constituents: a calcium aluminates- and trihydrated alumina-based material.Type: GrantFiled: February 3, 1989Date of Patent: January 8, 1991Assignee: LaFarge Fondu InternationalInventor: Alain Mathieu
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Patent number: 4961787Abstract: The advantae of high alumina cement (early strength, resistance to sulphate attack) are preserved and its disadvantage (weakens with age) is solved by mixing it 50:50 with ground granulated blast furnace slag. This encourages formation of gehlenite octahydrate in preference to or to the exclusion of the harmful `conversion` (weakening) reaction.Type: GrantFiled: September 28, 1988Date of Patent: October 9, 1990Assignee: National Reserach Development CorporationInventors: Amalendu J. Majumdar, Bahadur Singh
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Patent number: 4957556Abstract: Methods for forming very early setting, ultra high strength cements and the cements so produced are claimed. The methods comprise forming a mixture of raw materials containing SiO.sub.2, Al.sub.2 O.sub.3, CaO, Fe.sub.2 O.sub.3, and SO.sub.3, respectively designated S, A, C, F, and S such that the overall molar ratio of A/F exceeds approximately 0.64 and the overall molar ratio of S/A+F is between approximately 0.35 and 0.25. This mixture is heated to n elevated temperature between 1,000.degree. C. and 1,200.degree. C. for a sufficient period of time to produce a clinker containing high concentrations of C.sub.4 A.sub.3 S. The average amount of C.sub.4 A.sub.3 S is then determined and a final mixture is formed utilizing the high C.sub.4 A.sub.3 S clinker, C containing hydraulic or portland type cement and soluble CS anhydride to produce a final cement mixture having a C.sub.4 A.sub.Type: GrantFiled: June 8, 1989Date of Patent: September 18, 1990Inventor: Hassan Kunbargi
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Patent number: RE33700Abstract: Parts subject to wear, which come into contact with metal melts, are formed with a hydraulically setting high-alumina refractory concrete having a compression strength when cold, measured on dried crude product, of at least 400 kp/cm.sup.2. The compression strength is at least 700 kp/cm.sup.2 after firing at 1400.degree. C. The refractory concrete has a dimensional stability at 1400.degree. C. of at least plus or minus 0.2%. The refractory concrete contains corundum and active alumina as aggregates, an alumina .[.concrete.]. .Iadd.cement .Iaddend.containing less than 22% lime and, as required, a thinning agent. Up to 5% of the aggregates can be replaced by a spinel-forming substance preferably MgO or MgO-yielding compounds; or up to 5% of the aggregates can be replaced by carbon black, pitch or graphite; or up to 7% of the aggregates can be replaced by chromium oxide. Aggregates under 0.5 mm can be present in the refractory concrete as round grains.Type: GrantFiled: December 9, 1987Date of Patent: September 24, 1991Assignee: Didier-Werke AGInventors: Gunter Gelsdorf, Hermann Leupold, Franc Schellberg