Additive Materials For Inorganic Cements Which Contain A Hydraulic Settable Material Patents (Class 106/819)
Organic material containing additive (e.g., carbohydrate, bituminous material, etc.) (Class 106/823)
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Patent number: 5985011Abstract: Compositions for controlling damage to cementitious materials as a result of alkali-silica reactions (ASR) are provided. The compositions include a lithium containing material and a surface active agent. The compositions are capable of effectively delivering lithium into a cementitious material after the composition is applied to a surface thereof. Processes for treating cementitious materials using the compositions are also provided.Type: GrantFiled: September 10, 1998Date of Patent: November 16, 1999Assignee: FMC CorporationInventors: Gary Earl Foltz, Hugh Hong Wang, David Brian Stokes, Claudio Emilio Manissero
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Patent number: 5968257Abstract: An ultrafine cementitious grout in three particle grades containing Portland cement, pumice as a pozzolanic material and superplasticizer in the amounts of about 30 wt. % to about 70 wt. % Portland cement; from about 30 wt. % to about 70 wt. % pumice containing at least 70% amorphous silicon dioxide; and from 1.2 wt. % to about 5.0 wt. % superplasticizer. The superplasticizer is dispersed in the mixing water prior to the addition of dry grout and the W/CM ratio is about 0.4 to 1/1. The grout has very high strength and very low permeability with good workability. The ultrafine particle sizes allow for sealing of microfractures below 10 .mu.m in width.Type: GrantFiled: January 15, 1998Date of Patent: October 19, 1999Assignee: Sandia CorporationInventor: Ernst H. Ahrens
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Patent number: 5968256Abstract: An accelerating admixture for use with sprayable cementitious compositions such as shotcrete comprises a mixture of (a) amorphous aluminium hydroxide and/or aluminium hydroxysulphate, and (b) at least one amine, preferably an alkanolamine. In a preferred embodiment, the admixture also comprises an aqueous dispersion of at least one polymer which comprises pendant carboxylic moieties.Type: GrantFiled: April 29, 1997Date of Patent: October 19, 1999Assignee: MBT Holding AGInventor: Bernhard Leikauf
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Patent number: 5951752Abstract: An aqueous composition for coloring cement based compositions comprising water, pigment, a suspension enhancing agent and latex polymer solids.Type: GrantFiled: June 5, 1998Date of Patent: September 14, 1999Assignee: C-Cure CorporationInventors: Charles J. Johansen, Jr., Ernest D. Hollas, Robert L. Vecchio, Hani Zoumut
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Patent number: 5935318Abstract: An accelerating admixture for use with cementitious compositions, especially shotcrete, comprises aluminium sulphate and at least one alkanolamine. The admixture also preferably comprises an stabilising agent, which is preferably selected from aqueous stable polymeric dispersions and sepiolite magnesium silicate.Type: GrantFiled: June 9, 1997Date of Patent: August 10, 1999Assignee: MBT Holding AGInventors: Terje Angelskar, Helmut Gebhardt, Martin Weibel
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Patent number: 5935317Abstract: A CO.sub.2 pre-curing period is used prior to accelerated (steam or high-pressure steam) curing of cement and concrete products in order to: (1) prepare the products to withstand the high temperature and vapor pressure in the accelerated curing environment without microcracking and damage; and (2) incorporate the advantages of carbonation reactions in terms of dimensional stability, chemical stability, increased strength and hardness, and improved abrasion resistance into cement and concrete products without substantially modifying the conventional procedures of accelerated curing. Depending on the moisture content of the product, the invention may accomplish CO.sub.2 pre-curing by first drying the product (e.g. at slightly elevated temperature) and then expose it to a carbon dioxide-rich environment. Vigorous reactions of cement paste in the presence of carbon dioxide provide the products with enhanced strength, integrity and chemical and dimensional stability in a relatively short time period.Type: GrantFiled: October 9, 1997Date of Patent: August 10, 1999Assignee: DPD, Inc.Inventors: Parviz Soroushian, Jer-Wen Hsu
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Patent number: 5932000Abstract: A method for preparing concrete or mortar in which a mixture of a hydraulic binder, aggregates, water, and colloidal silica is prepared. The relative standard deviation of the particle size distribution by numbers of the colloidal silica is at least about 30%. The invention also relates to concrete or mortar obtainable by the method.Type: GrantFiled: September 12, 1997Date of Patent: August 3, 1999Assignee: EKA Chemicals ABInventors: Hans Bergqvist, Satish Chandra
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Patent number: 5928420Abstract: A combination of a class C fly ash having a high analytical content of CaO, and a silica fume, with a hydraulic cement, such as Portland cement, produces concrete with alkali-silica reactive aggregate having acceptable low expansion such as by ASTM C 1260; and also produces sulphate resistance with mineral aggregates generally.Type: GrantFiled: September 24, 1998Date of Patent: July 27, 1999Assignee: Lafarge Canada, Inc.Inventors: David Bridson Oates, Michael David Arthur Thomas, Philip de Sousa Zacarias, Donald Stephen Hopkins, Kevin Moire Cail
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Patent number: 5925416Abstract: Colloids of non-metals or metals, their oxides, hydroxides, oxihydrates and/or polymers (such as, e.g., heteropolyacids) are used in a method for reducing the susceptibility to fissuring in the curing of non-cured binder suspensions (such as, e.g., unset concrete, ready-mix) and for aftertreating already cured binder suspensions (such as, e.g., concrete).Type: GrantFiled: December 6, 1996Date of Patent: July 20, 1999Assignee: Holderchem Holding AGInventors: Manfred Akstinat, Willi Suter
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Patent number: 5916361Abstract: This development produces a rapid hardening hydraulic cement, (RHHC) composite, which has less free lime to develop calcium hydroxide, and an additive, which has three components. One--a pozzolan, to combine with the lime left in the cement; Two--a plasticizer for workability, and Three--a retarder to control the set time of the resulting mix (Zircrete). The significance of the combination of the components is the development of stable properties in a glass fiber reinforced cement matrix in a fully aged or cured condition.Type: GrantFiled: October 12, 1993Date of Patent: June 29, 1999Assignee: Henry J. Molly & Associates, Inc.Inventors: Henry J. Molloy, John Jones
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Patent number: 5916483Abstract: Additives are disclosed which inhibit the corrosion of metals in construction materials which contain an inorganic binder. The inventive corrosion inhibitors contain a reaction product of amines and acids or they consist of such a reaction product. Said saltlike corrosion inhibitors upon use do not develop any undesired fragrance, and they furthermore do not bring along any health risks for the persons who are working with said substances. Through the adding of the inventive corrosion inhibitors, furthermore the properties of the construction material during its preparation and also during its use can be improved. In corresponding processes for inhibiting the corrosion of metals which are in contact with the construction materials, like e.g. metal armings, the corrosion inhibitors are usually added in an amount of 0.01% by weight to 10% by weight of said reaction product, referred to the inorganic binder which is contained in such material.Type: GrantFiled: October 21, 1996Date of Patent: June 29, 1999Assignee: Sika AG, vorm, Kaspar Winkler & Co.Inventors: Theodor A. Burge, Urs Mader
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Patent number: 5911819Abstract: A method for coating a substrate with a cementitious composition by spraying, comprising the addition to the initial cementitious mix one of a .beta.-naphthalene sulphonate-formaldehyde condensate and a water-soluble poly(alkylene oxide) of molecular weight from 100,000-8,000,000, the other being added at the spraying nozzle, there being additionally added at the nozzle (preferably as a single component with the other nozzle-added material) an accelerator selected from aluminium sulphate, aluminium hydroxide and aluminium hydroxysulphate. In a preferred embodiment, the material added at the nozzle also contains a superplasticiser.Type: GrantFiled: December 17, 1996Date of Patent: June 15, 1999Assignee: MBT Holding AGInventors: Josef Franz Drs, Bernhard Leikauf, Max Oppliger
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Patent number: 5897701Abstract: Pulp fibers derived from wood or non-wood plants or recycled paper products are individualized and dispersed in water, and mixed into cement-based mixtures using conventional mixing procedures at relatively low dosages of about 0.3-30 kg of fiber per cubic meter of concrete. Once individualized, the affinity of plant pulp fibers for water facilitates their dispersion in normal cement-based mixtures. Fresh cement-based materials incorporating the dispersed individualized plant pulp fibers provide desirable workability, resistance to segregation and bleeding, pumpability, finishability, and reduced rebound when pneumatically applied. Hardened cement-based materials incorporating the dispersed individualized plant pulp fibers provide improvements in crack resistance, toughness, impact resistance, fatigue life, abrasion resistance, and other mechanical, physical and durability characteristics.Type: GrantFiled: June 30, 1997Date of Patent: April 27, 1999Assignee: DPD, Inc.Inventors: Parviz Soroushian, Jer-Wen Hsu
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Patent number: 5895525Abstract: Rapid setting cementitious compositions comprise hydraulic cement and at least 4% by weight based on the weight of the cement of a water-soluble malate or citramalate such as an alkali metal malate or alkali metal citramalate.Type: GrantFiled: August 28, 1997Date of Patent: April 20, 1999Assignee: MBT Holding AGInventors: Lan Huang, Stephen A. Farrington
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Patent number: 5891239Abstract: The present invention regards a particularly quick-setting Portland cement clinker containing calcium fluoro-aluminate (11CaO.7Al.sub.2 O.sub.3.CaF.sub.2) mixed with lime that has not undergone the burning process of the clinker.Type: GrantFiled: July 16, 1997Date of Patent: April 6, 1999Assignee: Italcement, S.p.A.Inventor: Umberto Costa
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Patent number: 5863323Abstract: Binder compositions are provided which include a mineral binder and a silicon-containing carbon black. The silicon-containing carbon black can have attached an ionic or ionizable organic group or can be oxidized. Silicon-containing carbon blacks may be prepared by a furnace method. The binder compositions of the present invention have improved coloring and weathering properties in comparison to binder compositions prepared with conventional carbon blacks. Furthermore, the binder compositions that incorporate silicon-containing carbon blacks having ionic or ionizable organic groups attached exhibit excellent dispersibility, even in pelletized form. Articles such as roofing tiles can be prepared from the binder compositions. Also contemplated is a method of improving the color stability of a mineral binder composition. Silicon-containing carbon blacks as described above are added to the mineral binder composition.Type: GrantFiled: April 7, 1997Date of Patent: January 26, 1999Assignee: Cabot CorporationInventors: Khaled Mahmud, Jameel Menashi, James A. Belmont, Ralph Ulrich Boes
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Patent number: 5858083Abstract: Cementitious binders include calcium sulfate beta-hemihydrate, a cement component comprising Portland cement, and either silica fume or rice-husk ash. The silica fume or rice-husk ash component is at least about 92 wt % amorphous silica and has an alumina content of about 0.6 wt % or less.Type: GrantFiled: May 19, 1997Date of Patent: January 12, 1999Assignee: National Gypsum CompanyInventors: Elisha Stav, Edward A. Burkard, Ronald S. Finkelstein, Daniel A. Winkowski, Lambert J. Metz, Patrick J. Mudd
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Patent number: 5855665Abstract: An aqueous composition for coloring cement based compositions comprising water, pigment, a suspension enhancing agent and latex polymer solids.Type: GrantFiled: August 7, 1997Date of Patent: January 5, 1999Assignee: C-Cure CorporationInventors: Charles J. Johansen, Jr., Ernest D. Hollas, Robert L. Vecchio, Hani Zoumut
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Patent number: 5850880Abstract: Powdered and liquid fluid loss additives are disclosed for use in cementing wellbores, particularly oil and gas wellbores. Excellent fluid loss control is achieved over a wide range of conditions using various cements systems. The invention utilizes polyvinyl acetate polymers as a fluid loss additive. The polyvinyl acetate polymer is used in conjunction with a dispersing sulfonated polymer and surfactant. This highly effective combination is then adjusted to individual well conditions with chelating agent, cross-linking agent, biocides, antifoams, or combinations of these. The dispersants are novel dispersing agent polymers such as melamine sulfonate polymer, vinyl sulfonate polymer and styrene sulfonate polymer and mixtures of these. These dispersant materials are usually prepared at low pH and can be used in the acid form, or neutralized to form salts of the polymers, wherein the salt can be a Group I or Group II metal salt, or ammonium salts (common salts).Type: GrantFiled: November 14, 1997Date of Patent: December 22, 1998Assignee: Conoco Inc.Inventors: Larry K. Moran, Landreth L. Moran
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Patent number: 5849075Abstract: Ground bottom ash, a waste material derived from combustion of coal, which presents a disposal problem, replaces part of the cement in a cementitious material useful in concretes and mortars and provides compressive strengths in concretes comparable with or better than corresponding cements in which there is no replacement of cement by ground bottom ash and cements containing fly ash.Type: GrantFiled: January 30, 1997Date of Patent: December 15, 1998Assignee: Lafarge Canada Inc.Inventors: Donald Stephen Hopkins, David Bridson Oates
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Patent number: 5846315Abstract: An aqueous composition for coloring cement based compositions comprising water, pigment, a suspension enhancing agent and latex polymer solids.Type: GrantFiled: August 7, 1997Date of Patent: December 8, 1998Assignee: C-Cure CorporationInventors: Charles J. Johansen, Jr., Ernest D. Hollas, Robert L. Vecchio, Hani Zoumut
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Patent number: 5846316Abstract: A shrinkage compensating cement exceeding the ASTM standard specification limiting 28 day expansion to 115% of the 7 day expansion. 28 day expansions of 120-200% are contemplated. The expansion takes place over an extended period of time, to better offset the shrinkage occurring as the concrete dries. The development of tensile stresses in the concrete is reduced and also is delayed, allowing more time for the tensile strength of the concrete to increase as the concrete dries. Shrinkage cracking is consequently significantly reduced.Type: GrantFiled: September 12, 1996Date of Patent: December 8, 1998Inventor: Edward K. Rice
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Patent number: 5843216Abstract: A multicomponent aqueous flowable admixture is formed with silica fume and stabilized with one or more high-range concrete water-reducing agents or one or more ordinary concrete water-reducing agents alone or in combination. The admixture is of particular advantage when added to fresh concrete or mortar to enhance plasticity and workability as compared to conventional concrete or mortar.Type: GrantFiled: December 19, 1990Date of Patent: December 1, 1998Assignee: Elkem Materials Inc.Inventor: Magne D.ang.st.o slashed.l
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Patent number: 5840114Abstract: A high early strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which are attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can be added simultaneously as one admixture, or separately. The invention relates also to methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particarly, and also pertains to such hydraulic mixtures containing the calcium salt and copolymer.Type: GrantFiled: May 17, 1996Date of Patent: November 24, 1998Assignee: W. R. Grace & Co.-Conn.Inventors: Ara Avedis Jeknavorian, Ahmad Arfaei, Neal Steven Berke, David Charles Darwin, Ellis Martin Gartner, Leslie Ann Jardine, James Franklin Lambert, Lawrence Reeder Roberts
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Patent number: 5837315Abstract: Compositions for controlling damage to cementitious materials as a result of alkali-silica reactions (ASR) are provided. The compositions include a lithium containing material and a surface active agent. The compositions are capable of effectively delivering lithium into a cementitious material after the composition is applied to a surface thereof. Processes for treating cementitious materials using the compositions are also provided.Type: GrantFiled: December 23, 1996Date of Patent: November 17, 1998Assignee: FMC CorporationInventors: Gary Earl Foltz, Hugh Hong Wang, David Brian Stokes, Claudio Emilio Manissero
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Patent number: 5804175Abstract: A method for producing cement useful for preparing pastes, mortars, concretes and other cement-based materials, having a high workability with reduced water content, high strength and density, and a rapid development of strength, which method includes a mechanicochemical treatment of cement. The method includes a two-stage mechanicochemical treatment of a mixture of cement and at least one of two components, the first component being a SiO.sub.2 -containing microfiller and the second component being a polymer in the form of a powdery water-reducing agent. In the first stage the cement and the first and/or the second component are intensively mixed in a dry state, whereby particles of the first and/or the second component are adsorbed on the cement particles.Type: GrantFiled: October 30, 1995Date of Patent: September 8, 1998Inventors: Vladimir P. Ronin, Marwin Haggstrom
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Patent number: 5803963Abstract: A system is provided including smart fibers which are employed to deliver agents or components to a matrix before or during cure to affect matrix cure or shaping reactions and final cured structures. The delivered agents may be reactants or catalysts to initiate or modify curing, or other agents such as heat, steam, or a coolant, for example. The system may be used to simulate bone formation, growth, and repair.Type: GrantFiled: November 8, 1995Date of Patent: September 8, 1998Inventor: Carolyn M. Dry
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Patent number: 5804154Abstract: Colloidal compositions based on fillers, sol oxides, poly silicates, and, optionally, pigmenting agents, and their method of production the solid disperse phase not only operates to cross-link but also as an overmatrix incorporating macroparticles therein. The dispersant is finally chemically set with excess setting agent so that the preliminary product can be finalized to the desired material. For this purpose a matrix-like substance of filler-like macroparticles and sol oxide (crosslinling substance) and a buffer are brought together for assisting the formation of the overmatrix and are processed. This substance is pigmentable by introducing a variation mixture into the substance, so that a wide range of characteristics can be obtained. The substance directed at the desired material, namely a hydration and balancing process stage and a subsequent setting and stabilizing process stage.Type: GrantFiled: August 2, 1994Date of Patent: September 8, 1998Inventor: Victor Alexander Milles
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Patent number: 5792251Abstract: A method of forming powdered metakaolin for use as an additive in cement based materials comprising the steps of calcining kaolin so as to reduce the hydroxyl content thereof to produce a meta-stable material have an identifiable amorphousness, and pulverizing the meta-stable material into a powder having a particle size of 50 microns or less.Type: GrantFiled: February 14, 1997Date of Patent: August 11, 1998Assignee: North American Refractories Co.Inventors: William D. Smiley, George Bartich, Mike Stromberg, Randy Lemley, Robert L. Antram, Keith T. Snider
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Patent number: 5792252Abstract: Cement admixtures contain an alkali metal carbonate as component (a) and a mono- or di-carboxylate acid or alkali metal salt thereof or an alkali metal salt of a tricarboxylic acid as component (b).Type: GrantFiled: October 30, 1997Date of Patent: August 11, 1998Assignee: MBT Holding AGInventor: Sandra R. Sprouts
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Patent number: 5776244Abstract: An ultrafine cementitious grout having a particle size 90% of which are less than 6 .mu.m in diameter and an average size of about 2.5 .mu.m or less, and preferably 90% of which are less than 5 .mu.m in diameter and an average size of about 2 .mu.m or less containing Portland cement, pumice as a pozzolanic material and superplasticizer in the amounts of about 40 wt. % to about 50 wt. % Portland cement; from about 50 wt. % to about 60 wt. % pumice containing at least 60% amorphous silicon dioxide; and from 0.1 wt. % to about 1.5 wt. % superplasticizer. The grout is mixed with water in the W/CM ratio of about 0.4-0.6/1. The grout has very high strength and very low permeability with good workability. The ultrafine particle sizes allow for sealing of microfractures below 10 .mu.m in width.Type: GrantFiled: September 10, 1996Date of Patent: July 7, 1998Assignee: Sandia CorporationInventor: Ernst H. Ahrens
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Patent number: 5772752Abstract: The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction and other applications, which hardenable mixtures demonstrate significant levels of acid and sulfate resistance while maintaining acceptable compressive strength properties. The acid and sulfate hardenable mixtures of the invention containing fly ash comprise cementitious materials and a fine aggregate. The cementitous materials may comprise fly ash as well as cement. The fine aggregate may comprise fly ash as well as sand. The total amount of fly ash in the hardenable mixture ranges from about 60% to about 120% of the total amount of cement, by weight, whether the fly ash is included as a cementious material, fine aggregate, or an additive, or any combination of the foregoing. In specific examples, mortar containing 50% fly ash and 50% cement in cementitious materials demonstrated superior properties of corrosion resistance.Type: GrantFiled: November 20, 1996Date of Patent: June 30, 1998Assignee: New Jersey Institute of TechnologyInventors: John W. Liskowitz, Methi Wecharatana, Chai Jaturapitakkul, Anthony E. Cerkanowicz, deceased
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Patent number: 5769939Abstract: The present invention relates to a cement-based injection grout containing microcement and water for consolidation and/or waterproofing fine granular soils, finally fissured soils and cracks in rocks or concrete structures. In addition to microcement and water the grout contains amorphous silica particles in an amount of 5-70% based on the weight of cement and 0-10% water-reducing agents based on the weight of the cement, said grout having a weight ratio between water and cement+amorphous silica between 2 and 8.Type: GrantFiled: June 4, 1997Date of Patent: June 23, 1998Assignee: Elkem ASAInventors: Eldar O. Dings.o slashed.yr, Per Fidjest.o slashed.l, Oddny J.o slashed.rgensen
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Patent number: 5755876Abstract: Processes for making cement which when used to make concrete can stabilize the concrete against alkali-silica reactivity (ASR) from alkali containing components. The process includes adding lithium containing materials in the front of a cement kiln along with the cement starting materials in an amount sufficient to minimize ASR.Type: GrantFiled: September 6, 1996Date of Patent: May 26, 1998Assignee: FMC CorporationInventors: David B. Stokes, Gary E. Foltz, Claudio E. Manissero
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Patent number: 5753368Abstract: The bonding between concrete and fibers is enhanced by using a fiber coating material selected from certain glycol ethers, having at least three carbon atoms in an oxyalkylene group, and glycerol ethers. The present invention pertains to such coated fibers, a method for modifying a concrete using the coated fibers, and a cementitious composition containing the coated fibers.Type: GrantFiled: August 22, 1996Date of Patent: May 19, 1998Assignee: W.R. Grace & Co.-Conn.Inventors: Neal S. Berke, Kevin J. Folliard, Awdhoot Vasant Kerkar, Brian Scott Gilbert
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Patent number: 5750053Abstract: A corrosion inhibitor formulation for use in reinforced concrete structures, the inhibitor reducing the rate of corrosion in metallic reinforcing rods placed within the structures. The formulation comprises a mixture of alkali metal glucoheptonates and alkali metal molybdates.Type: GrantFiled: January 31, 1996Date of Patent: May 12, 1998Assignee: Cortec CorporationInventors: Boris A. Miksic, Christophe Chandler, Margarita Kharshan, Alla Furman, Barry Rudman, Larry Gelner
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Patent number: 5749962Abstract: Cement is made from base metal smelter slag produced by a nickel, copper, lead or zinc smelter. The slag is ground to a size within the range of from about -250 to about 425 mesh to produce ground slag cement, and the ground slag cement is mixed with Type 3 high early strength Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.Type: GrantFiled: November 26, 1996Date of Patent: May 12, 1998Assignee: Fenicem Minerals, Inc.Inventor: David Krofchak
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Patent number: 5749963Abstract: The hardenable mortar composition consists of a bonding agent component including a hydraulic bonding agent, such as cement, gypsum or mortar, and a paste-forming agent consisting of a liquid solvent inert with respect to the hydraulic bonding agent, and an aqueous component kept separate from the bonding agent component until the two components are mixed to form a hardened mortar composition. The aqueous component includes water and a hydrophobic adsorbent or absorbent. The hydrophobic adsorbent or absorbent is included in the aqueous component to avoid the emergence of the paste-forming agent, which is at the very least unsightly, when the aqueous component is mixed with the bonding agent component. The hydrophobic adsorbent or absorbent binds the paste-forming agent which would otherwise escape during mixing and remains as an inert additive in the setting mortar composition, without reducing the hardness thereof.Type: GrantFiled: February 13, 1997Date of Patent: May 12, 1998Assignee: fischerwerke, Artur Fischer GmbH & Co. KGInventors: Norbert Arnold, Willi Haug, Stefan Lind
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Patent number: 5746822Abstract: A cementitious composition of the setting type which can be kept in a ready-mixed state and which can be caused to set and harden upon introduction of an accelerator with reproducibility and set time predictability. The cementitious base composition contains calcium sulfate hemihydrate as a principal filler material and certain non-calcium bearing phosphate additives which prevent setting action in the presence of water. An accelerator, such as zinc sulfate, may be added to the ready-mixed, cementitious composition to initiate the setting action, or the ready-mixed cementitious composition can be used as a drying type joint compound without the addition of an accelerator.Type: GrantFiled: January 11, 1996Date of Patent: May 5, 1998Assignee: United States Gypsum CompanyInventors: Therese A. Espinoza, Charles J. Miller, Richard B. Stevens
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Patent number: 5728208Abstract: A new concrete mix sodium nitrate, sodium carbonate, sodium sulfate, calcium chloride, calcium carbide, lime, cement, coarse aggregate and sand in a percent ratio of (0.51-0.70):(0.56-0.58):(0.66-0.90):(0.05-0.10):(0.17-0.40):(0.05-0.01):(2 5-30):(29.25-12):(30-35) mixed with 13.75 to 20% of water. A process for preparing the composition involves comminution of certain components to a predetermined range of particle size and a treatment to insure certain ranges of moisture content of various components of the composition.Type: GrantFiled: June 1, 1995Date of Patent: March 17, 1998Assignees: Nadia Rusinoff, Helen RusinoffInventor: Alexander Rusinov
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Patent number: 5728210Abstract: Powdered and liquid fluid loss additives are disclosed for use in cementing wellbores, particularly oil and gas wellbores. Excellent fluid loss control is achieved over a wide range of conditions using various cements systems. The invention utilizes polyvinyl acetate polymers as a fluid loss additive. The polyvinyl acetate polymer is used in conjunction with a dispersing sulfonated polymer and surfactant. This highly effective combination is then adjusted to individual well conditions with chelating agent, cross-linking agent, biocides, antifoams, or combinations of these. The dispersants are novel dispersing agent polymers such as melamine sulfonate polymer, vinyl sulfonate polymer and styrene sulfonate polymer and mixtures of these. These dispersant materials are usually prepared at low pH and can be used in the acid form, or neutralized to form salts of the polymers, wherein the salt can be a Group I or Group II metal salt, or ammonium salts (common salts).Type: GrantFiled: April 26, 1996Date of Patent: March 17, 1998Assignee: Conoco Inc.Inventors: Larry K. Moran, Landreth L. Moran
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Patent number: 5728209Abstract: An additive for concrete, mortar or grout comprises at least one admixture material in a compacted unit of selected amount, the unit having strength sufficient to maintain structural integrity during handling and storage, but having sufficient solubility or friability upon mechanical agitation within a wet mixing environment of a cementitious composition mixture to dissolve or fragment for uniform dispersal throughout the cementitious composition mixture.Type: GrantFiled: August 15, 1997Date of Patent: March 17, 1998Assignee: MBT Holding AGInventors: Jeffrey Bury, David F. Factor, Zvi Grauer
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Patent number: 5728428Abstract: A new composition for the protection of a body of concrete sodium nitrate, sodium carbonate, sodium sulfate, calcium chloride, calcium carbide, lime, cement, and sand in a percent ratio of (0.9-1.8):(2-3):(2.5-3.6):(0.05-0.15):(0.75-1.15):(0-8-1):(36-40):(49-39.3 ) mixed with 8 to 10% of water. A process for preparing the composition involves comminution of certain components to a predetermined range of particle size and a treatment to insure certain ranges of moisture content of various components of the composition. A new method for the application of the protective composition involves the preparation of the surface being protected to increase the exposed surface area of the surface being protected by a factor of 1.15 to 1.36.Type: GrantFiled: June 1, 1995Date of Patent: March 17, 1998Assignees: Nadia Rusinoff, Helen RusinoffInventor: Alexander Rusinoff
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Patent number: 5725655Abstract: A method is described for making concrete mixture by blending new batch cement with recycled concrete material (curb & gutter, sidewalk, brick, block, asphalt & various other concrete items). This new process will enable discarded concrete materials to be reused as a valuable product.Type: GrantFiled: September 17, 1996Date of Patent: March 10, 1998Inventors: Robert L. Catterton, Tony H. Harris, Steven C. Harris
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Patent number: 5718759Abstract: A cementitious composition useful for water-resistant construction materials, including floor underlayments, backing boards, self-leveling floor materials, road patching materials, fiberboard, fire-proofing sprays, and fire-stopping materials includes about 20 wt. % to about 75 wt. % calcium sulfate beta-hemihydrate, about 10 wt. % to about 50 wt. % Portland cement, about 4 wt. % to about 20 wt. % silica fume and about 1 wt. % to about 50 wt. % pozzolanic aggregate. The Portland cement component may also be a blend of Portland cement with fly ash and/or ground blast slag.Type: GrantFiled: October 18, 1996Date of Patent: February 17, 1998Assignee: National Gypsum CompanyInventors: Elisha Stav, Edward A. Burkard, Ronald S. Finkelstein
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Patent number: 5718757Abstract: The invention relates to a phosphomagnesium cement obtained by mixing water and a binding phase based on at least one phosphorus compound, at least one magnesium compound and at least one inorganic compound, characterized in that the inorganic compound is introduced in the form:- either of particles (1) of size smaller than 0.1 .mu.m,- or of aggregates (2) of size smaller than 0.1 .mu.m,- or of agglomerates (3) capable of deagglomerating at least partially during the mixing of the said binding phase and of water, into particles of size smaller than 0.1 .mu.m or into aggregates of size smaller than 0.1 .mu.m.Type: GrantFiled: December 3, 1996Date of Patent: February 17, 1998Assignee: Rhone-Poulenc ChimieInventors: Bruno Le Guillou, Giiies Orange
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Patent number: 5711801Abstract: The present invention provides lightweight, fast setting cement compositions and methods which can be utilized in performing a variety of well cementing operations. The cement compositions are basically comprised of slag cement, water sufficient to form a pumpable slurry, a gas sufficient to foam the slurry and a foaming agent.Type: GrantFiled: September 25, 1996Date of Patent: January 27, 1998Inventors: Jiten Chatterji, James E. Griffith, Patty L. Totten, Bobby J. King
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Patent number: 5709743Abstract: Setting and hardening accelerating agent for siliceous hydraulic binders wherein: a) it is obtained by hydration, in the usual pressure and temperature conditions, and grinding of a siliceous hydraulic binder aqueous suspension; b) the suspension particles are sufficiently fine for the agent to meet the following test requirements: an aqueous suspension in a sedimentation specimen at 20.degree. C., containing 10 grams (dry weight) of the accelerating agent in 100 ml of water, must have a sedimentation deposit height at least equal to 50% of the initial height at the end of two days; c) it is in the form of an aqueous suspension.Type: GrantFiled: June 28, 1996Date of Patent: January 20, 1998Assignee: LaFargeInventors: Philippe Leture, Jacques Chappuis, Bruno Latrasse
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Patent number: 5707443Abstract: A grouting material which is self-dispersing when brought into contact with a volume of water containing liquor or slurry and is settable to a solid mass after such dispersion, the material being in the form of self-dispersing granules or pellets and comprising a blend of component (A): a cementive constituent forming from 10 per cent to 95 per cent by weight of the composition; component (B): a dispersing constituent forming from 2 per cent to 75 per cent by weight of the composition; optional component (C): a swelling constituent which forms from 0 per cent to 50 per cent by weight of the composition; and component (D): a binder constituent which forms from 0.1 per cent to 10 per cent by weight of the composition; the percentages of components A, B, C and D adding to 100 per cent.Type: GrantFiled: October 11, 1995Date of Patent: January 13, 1998Assignee: British Nuclear FuelsInventors: David John Brown, Stephen Geoffrey Higson
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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