Expanding, Foaming Or Porosity Producing Additive Patents (Class 106/820)
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Patent number: 5897699Abstract: The present invention relates to improved foamed well cement compositions, additives and methods. The additives, which foam and stabilize a cement slurry containing freshwater or saltwater, are basically comprised of an aqueous solution of an alpha-olefinic sulfonate surfactant and a betaine surfactant.Type: GrantFiled: July 23, 1997Date of Patent: April 27, 1999Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, David D. Onan, Roger S. Cromwell, Bobby J. King
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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: 5820670Abstract: The present invention provides resilient cement compositions and methods which are particularly useful in the construction and repair of oil and gas wells. The cement compositions have improved mechanical properties including elasticity and ductility.Type: GrantFiled: June 3, 1997Date of Patent: October 13, 1998Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Bobby J. King, Patty L. Onan, David D. Onan
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Patent number: 5806594Abstract: Foamed cement slurry compositions and a process or method for cementing well casings or pipes utilizing such compositions are described, the compositions being characterized by critical ratios of particular solid and liquid components. The slurry compositions formed provide unique properties such as rapid set or hydration, and are designed particularly for use with weakly consolidated formations.Type: GrantFiled: March 31, 1997Date of Patent: September 15, 1998Assignee: Schlumberger Technology CorporationInventors: David A. Stiles, Jean Mari Guy de Rozieres, deceased
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Patent number: 5788761Abstract: A process in which the conventional sulfate components in an aerated concrete mixture, such as gypsum, semihydrate or anhydrite, are replaced at least in part by calcium aluminum sulfates and/or calcium aluminate sulfate hydrates. As a result, agglomeration of the lime, retardation of the lime hydration, and aftergrowth of the cut aerated concrete cakes are reduced or even ruled out. In addition, the number of molds used can be reduced with the process in accordance with the invention, whereby the use of one single mold is achievable.Type: GrantFiled: October 15, 1996Date of Patent: August 4, 1998Assignee: Ytong AktiengesellschaftInventors: Dieter Hums, Klaus F. Lippe
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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: 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: 5690729Abstract: A method of reinforcing cement/concrete mixtures with alkali-intolerant reinforcements and/or aggregate, such as uncoated, common glass filament, plastic filament, fabric and roving made therefrom by reducing the pH of the mixture while in its plastic state, and/or after it has set and cured, to about 7. With a neutral pH, the alkali-intolerant reinforcements need not be coated to protect them from degradation. In the absence of alkalinity, the reinforcement and/or aggregate material bonds with the cement mixture to form a relatively stronger mixture, which can be shaped as desired, made part of permanently poured structures, cement boards and many other small and large products. By selecting appropriate and, if desired, different materials for the reinforcements and/or aggregate, the strength, flexibility, etc. characteristics of the product can be readily changed to adapt the product to the intended use. The pH is reduced by migrating such materials as CO.sub.2 and/or CO and O.sub.Type: GrantFiled: January 27, 1995Date of Patent: November 25, 1997Assignee: Materials Technology, LimitedInventor: Roger H. Jones, Jr.
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Patent number: 5641535Abstract: The invention relates to a process for the preparation of microencapsulated flakes or powders by drying aqueous mixtures containing (a) one or more water-emulsifiable, non-thermoplastic compounds which have a higher boiling point than water and (b) at least one water-soluble, film-forming polymer, in which the content of component (a) is up to about 95% by weight, based on the dry weight of components (a) and (b), with the proviso that the water-soluble, film-forming polymer has a flocculation point of from 20.degree. to 98.degree. C. or the flocculation point is adjusted to from 20.degree. to 98.degree. C. with the aid of additives, and drying is carried out by thin-layer drying in a temperature range above the flocculation point.Type: GrantFiled: February 26, 1992Date of Patent: June 24, 1997Assignee: Wacker-Chemie GmbHInventors: Herbert Eck, Heinrich Hopf, Gerald Fleischmann, Ernst Innertsberger, Jakob Schmidlkofer
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Patent number: 5641352Abstract: An early strength-enhancing admixture and cement composition is disclosed. The admixtures incorporate strength-enhancing components selected from the group consisting ofa. a nitrogenous compound of the formula ##STR1## wherein R.sub.1 =R.sub.5 A;R.sub.2 =R.sub.5 A, R.sub.5 OH, --OR.sub.6, --R.sub.6, --H, or Z;R.sub.3 =R.sub.5 A, R.sub.5 OH, --OR.sub.6, --R.sub.6, --H, or Z;A=--COOH or --SO.sub.3 H (or salts thereof)Z= ##STR2## R.sub.4 =an alkylene linking group; R.sub.5 =C.sub.1 -C.sub.10 alkylene;R.sub.6 =C.sub.1 -C.sub.10 alkyl;and at least one of R.sub.2 or R.sub.3 is R.sub.5 A, andb. a nitrogenous compound of the formula ##STR3## wherein R.sub.7 =R.sub.5 OH;R.sub.8 =R.sub.5, --R.sub.5 OH;R.sub.9 =--H, R.sub.5 OH.Type: GrantFiled: October 25, 1995Date of Patent: June 24, 1997Assignee: W.R. Grace & Co.-Conn.Inventors: Ara A. Jeknavorian, Leslie Jardine
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Patent number: 5635292Abstract: Incorporation of solid removable aggregates into powdered cement which later completely dissolve, evaporate, volatilize, or melt leaving voids in the cement composition is discussed. Cementitious articles are prepared by manipulating powdered hydraulic cement or cement paste compositions into mechanically self-supporting structures of a predetermined configuration and thereafter hydrating the hydraulic cement compositions without mechanical mixing of the cement and water.Type: GrantFiled: October 18, 1994Date of Patent: June 3, 1997Assignee: E. Khashoggi IndustriesInventors: Hamlin M. Jennings, Simon K. Hodson
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Patent number: 5618344Abstract: A cement admixture composed of a mixture of certain lower alkyl ether oxyalkylene adducts with certain higher alkylene diols to provide cement compositions of mortar and concrete which inhibit drying shrinkage while permitting substantial air entrainment and enhanced compressive strength.Type: GrantFiled: November 6, 1995Date of Patent: April 8, 1997Assignee: W. R. Grace & Co.-Conn.Inventors: Awdhoot V. Kerkar, Neal S. Berke, Michael P. Dallaire
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Patent number: 5595596Abstract: The present invention relates to a cement composition containing water, hydraulic cement, inert products and a foaming agent obtained by reacting ethylene oxide with a substrate deriving from the production of synthetic alcohols by the oxosynthesis of normal-olefins, sulfating the ethoxylate compound thus obtained with sulfuric anhydride and neutralizing the sulfated acid product with a base of an alkaline, earth-alkaline metal or ammonia.The cement composition can optionally contain conventional additives such as stabilizers, set retarders or accelerators and disperding agents suitable for lowering the viscosity of the composition.This cement composition has improved processability characteristics and enables the production of lightweight concretes having greater mechanical resistance and durability and lower thermal conductivity particularly appropriate for the building industry.Type: GrantFiled: December 29, 1995Date of Patent: January 21, 1997Assignee: Eniricerche S.p.A.Inventors: Armando Marcotullio, Massimo Santori
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Patent number: 5558707Abstract: A core for fire doors comprises hydrated gypsum occupying about 40% to 46% of the core volume and bubbles occupying almost all the core volume which is not gypsum. The bubbles preferably comprise about 31% to 38% by volume of larger bubbles of between 1 and 4 mm and about 17% to 25% of smaller bubbles between 0.01 mm and 0.25 mm. The larger bubbles are formed using styrene spheroids.Type: GrantFiled: June 1, 1995Date of Patent: September 24, 1996Assignee: J.O. Bernt & Associates LimitedInventors: Jorgen O. Bernt, Kevin B. Langille
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Patent number: 5547504Abstract: A non-shrink grout including Portland cement, sand and an additive which is a polymer incorporating at least one of a calcium compound and aluminum metal so as to be reactive with the cement. The grout when fresh expands during curing by gas formation and by hydration and expands when hardened. The grout is useful in construction.Type: GrantFiled: August 23, 1995Date of Patent: August 20, 1996Assignee: Board of Trustees operating Michigan State UniversityInventor: Parviz Soroushian
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Patent number: 5494514Abstract: A weather resistant soil cement with an open pore structure for resisting freeze-thaw damage is formed of cement, fly ash, Free aggregates, water, and an aqueous foamed surfactant, and other application specific additives. The material is uniquely suited for using indigenous soils, mill tailings, or granular waste products as the aggregate component of the mixture, although commercially produced aggregates may be used depending on economics and availability. Due to its low density and flowable nature, it can be pumped or placed by gravity and without compaction. The resulting product is a low density material with construction and mining applications, that is suited for use as a fill or mad base. Specific product formulations are easily designed to permit removal at local sites with conventional excavating equipment.Type: GrantFiled: June 14, 1994Date of Patent: February 27, 1996Assignee: Goodson & Associates, Inc.Inventors: Russell L. Goodson, Gary J. Colaizzi, Brian Masloff, Joseph J. Feiler
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Patent number: 5489333Abstract: An expansive Portland cement incorporating an expansive additive which is a polymer incorporating a calcium compound reactive with the cement is described. The shrinkage compensating concrete produced is much less likely to crack and is used in slabs and other structural systems where cracking of the concrete is a problem.Type: GrantFiled: March 9, 1995Date of Patent: February 6, 1996Assignee: Board of Trustees operating Michigan State UniversityInventors: Parviz Soroushian, Augustine C. Okwuegbu
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Patent number: 5443635Abstract: An admixture for cement compositions containing tetrahydroborate, and cement composition containing a tetrahydroborate admixture made of salt borohydride, cement, aggregate and water. Since tetrahydroborate has the expansion effect hardly influenced by temperature, expansion amount is easily controlled. Since cells generated by foaming are fine, a hardened body with the excellent resistance to freezing and thawing can be obtained.Type: GrantFiled: January 3, 1994Date of Patent: August 22, 1995Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Masashi Sugiyama, Kyoichi Tanaka, Kazuo Komatsu
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Patent number: 5393341Abstract: A method for the production of structural foam from air, water, foaming agent and an aggregate, particularly cement foam, for which cement slurry is blown under high pressure into a mixing chamber and mixed with a foaming agent and the mixture immediately thereafter is conveyed to an expansion nozzle, into which metered amounts of compressed air are blown.Type: GrantFiled: December 23, 1993Date of Patent: February 28, 1995Assignee: RUME Maschinenbau GmbHInventors: Dieter Meier, Heinz Ruppert
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Patent number: 5084101Abstract: A composition for the production of an open-pore foam product from essentially inorganic components contains, in addition to known components, a rock-forming solid substance, a curing agent, a foaming additive, and an at least partly alkali-soluble protein to produce open pores. The rock-forming component is a reactive solid substance selected from the group consisting ofI finely dispersed oxide mixture containing amorphous silicon dioxide and aluminium oxide,II vitreous, amorphous electrofilter ash,III milled calcined bauxite,IV electrofilter ash from a brown coal power station,V undissolved amorphous silicon dioxide from an amorphous disperse powder-like, dehydrated or water-containing silicic acid or from high temperature processes (silica fume),VI metakaolin, andVII cement.The curing agent is an alkali metal silicate solution containing 1.2 to 2.5 mols of silicon dixoide per mol of potassium oxide and/or sodium oxide.Type: GrantFiled: August 29, 1990Date of Patent: January 28, 1992Assignee: Huels Troisdorf AGInventors: Hans W. Engels, Karlheinz Neuschaffer
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Patent number: 4985080Abstract: A dry mortar mix based on an inorganic bonding agent and optionally additives, plastics, fibres, and other conventional concrete additives is proposed especially to protect concrete structures and/or to eliminate surface damage to such structures. In addition to the inorganic bonding agent, the dry mortar mix contains a granular additive to increase alkalinity, this having a reaction speed that is a considerably lower than that of the granular bonding agent. This "reserve alkalinity" serves to counteract the diffusion of CO.sub.2 and SO.sub.2 from the air into the concrete, and the damage to the concrete that is attendant on such diffusion.Type: GrantFiled: October 4, 1989Date of Patent: January 15, 1991Assignee: Allgemeine Baugesellschaft-A.Porr AktiengesellschaftInventor: Fritz Jung