Organic Material Containing Additive (e.g., Carbohydrate, Bituminous Material, Etc.) Patents (Class 106/823)
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Patent number: 6166119Abstract: A cement pumpability-enhancing additive which confers good pumpability on cementitious compositions such as concrete consists essentially of(a) polyethylene glycol;(b) diethylene glycol monobutyl ether and/or a derivative thereof;(c) polysaccharide; and(d) a thickening polymer selected from the group consisting of polyacrylic acid derivatives, polyacrylic amide derivatives, cellulose ethers, polyphenyl ethers and polyalkylene glycol fatty acid esters;the weight solids proportions of (a), (b), (c), and (d) in the additive being respectively 5-55%, 10-80%, 1-20% and 1-20%. The additive is preferably used with a cement dispersing agent.Type: GrantFiled: April 14, 1999Date of Patent: December 26, 2000Assignee: MBT Holding AGInventors: Shigemi Matsuo, Hidenori Nagamine, Akira Ota
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Patent number: 6165262Abstract: A novel cement admixture is provided which fulfills the function as a thickener basically, possesses an ability to inhibit segregation of materials, excels in workability as well, and permits a decrease in the amount of addition while keeping these functions intact. The cement admixture is characterized by comprising a cement additive formed of a polymer resulting from polymerizing a monomer mixture having methyl acrylate as a main component thereof and a cement water reducing agent.Type: GrantFiled: January 20, 1999Date of Patent: December 26, 2000Assignee: Nippon Shokubai Co., Ltd.Inventors: Katsuyuki Kono, Tsutomu Yuasa, Tsuyoshi Hirata
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Patent number: 6159281Abstract: The present invention provides a deterioration inhibitor for concrete or mortar which does not pollute water and which, in a small amount, can prevent the deterioration of concrete or mortar due to sulfur oxidizing bacteria for a long time, and also provides a method of inhibiting the deterioration of concrete or mortar which uses the deterioration inhibitor. A phthalocyanine compound is an effective component of the deterioration inhibitor for concrete or mortar. In the method of inhibiting the deterioration of concrete or mortar, the phthalocyanine compound is added to concrete or mortar.Type: GrantFiled: August 10, 1998Date of Patent: December 12, 2000Assignee: Toyo Ink Manufacturing Co., Ltd.Inventors: Hiromi Uchida, Toshio Enokida, Reiko Tanaka, Michiko Tamano
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Patent number: 6153006Abstract: An admixture for enhancing the durability of concrete to repeated freeze-thaw cycles is disclosed. The admixture comprises as an essential element a natural polymer material derived from millet. The admixture further comprises smaller quantities of naphthenic sulfate salt, triethanolamine and formaldehyde. In addition the admixture can improve concrete's impermeability and chloride ion binding capability.Type: GrantFiled: November 13, 1998Date of Patent: November 28, 2000Assignee: The Hong Kong University of Science and TechnologyInventors: Zongjin Li, Chung Kong Chau, Faming Li, Baoguo Ma
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Patent number: 6153673Abstract: The invention discloses a new phosphomagnesium cement that can be obtained by contacting at least one phosphorus compound and at least one magnesium compound based binder phase, with at least one polymer in water insoluble particle form, and water. The polymer can be selected among those derived from the polymerisation of at least one ethylenically unsaturated monomer and at least one monomer selected among monomers with carboxylic function and acrylamide or methacrylamide. The phosphomagnesium cement can also comprise an aminoalkylsilane, preferably an aminoalkyl(alkoxysilane).Type: GrantFiled: February 16, 1999Date of Patent: November 28, 2000Assignee: Rhodia ChimieInventors: Dominique Lemos, Gilles Orange, Jean-Francois Colombet
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Patent number: 6149725Abstract: An injection cement on the basis of micro cement is described that comprises corrosion inhibitors, preferably salt-like products of the neutralisation of amines with acids. Said cement is in particular suitable for the restoration and improvement of the corrosion resistance of buildings comprising fine cracks and cavities laying far below the surface.Type: GrantFiled: March 8, 1999Date of Patent: November 21, 2000Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Theodor A. Burge, Franz Wombacher
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Patent number: 6142303Abstract: Apparatus and method for the interim sanitary storage of medical sharps and subsequent inurnment of them to a condition acceptable in commercial landfills. A receptacle contains dry calcium hypochlorite to sanitize sharps that are placed in the reception. It has a removable closure cap to admit the sharps. A supply container contains cementitious material to which water is added, and then poured into the receptacle to envelop the sharps. A permanent lock is applied to the receptacle cap to prevent further access or escape of the sharps which are encapsulated in the resulting cementitious urn.Type: GrantFiled: November 5, 1998Date of Patent: November 7, 2000Assignee: Earth-Shield IncorporatedInventors: Joe A. Dendy, Mark T. Rodgers, Lucas T. Dobrzanski
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Patent number: 6143069Abstract: The present invention provides light weight high temperature well cement compositions and methods. The compositions are basically comprised of calcium aluminate, ASTM class F fly ash and water.Type: GrantFiled: July 27, 1998Date of Patent: November 7, 2000Assignee: Halliburton Energy Services, Inc.Inventors: Lance E. Brothers, Susan M. Turkett, Barry B. Ekstrand, D. Chad Brenneis, Jerry D. Childs
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Patent number: 6139622Abstract: This invention relates to a process for the production of a homogeneously waterproofed concrete (integrally waterproofed concrete) in which an aqueous hydrolysable, emulsion containing organosilicon compounds is added before curing to the fresh concrete mix prepared from water, inorganic and optionally organic constituents, which emulsion contains at least one alkoxysilane and optionally an organosilicon compound acting as a surfactant.Type: GrantFiled: October 30, 1998Date of Patent: October 31, 2000Assignee: Degussa-Huls AGInventors: Thomas Gobel, Wolfgang Lortz, Reiner Storger, Folker Wittmann, Andreas Gerdes
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Patent number: 6139623Abstract: Exemplary emulsion admixture for use in hydraulic cement compositions formed by emulsifying an antifoaming agent, surfactant, and a comb polymer having a carbon-containing backbone to which are attached cement-anchoring members and oxyalkylene groups. A method of making a stable emulsion admixture comprising the comb polymer, as well as a hydraulic cement composition comprising the admixture, are also described.Type: GrantFiled: January 20, 1998Date of Patent: October 31, 2000Assignee: W. R. Grace & Co.-Conn.Inventors: David Charles Darwin, Robert T. Taylor, Ara A. Jeknavorian, Ding Feng Shen
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Patent number: 6136950Abstract: The invention is directed to a polymer dispersant comprising a substituted polyimide or polyamide backbone, having at least some proportion of oligomeric or polymeric grafted side chains including one of amides, esters, and thioesters, having the general formula: wherein X is at least one of hydrogen, an alkali earth metal ion, an alkaline earth metal ion, ammonium ion, and amine; R is at least one of C.sub.1 to C.sub.6 alkyl(ene) ether and mixtures thereof and C.sub.1 to C.sub.6 alkyl(ene) imine and mixtures thereof; Q is at least one of oxygen, nitrogen, and sulfur; p is a number from 1 to about 300 resulting in at least one of a linear and branched side chain; R.sub.1 is at least one of hydrogen, C.sub.1 to C.sub.Type: GrantFiled: September 23, 1997Date of Patent: October 24, 2000Assignee: MBT Holding AGInventors: Thomas M. Vickers, Jr., Runhai Lu, Lynn E. Brower, Samy M. Shendy, Rainer Packe-Wirth, Hong Gao
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Patent number: 6126739Abstract: An aqueous dispersion containing a latex, an alkaline earth metal formate, cellulose ether and lauryl sulphonate can be added to a concrete mixture as an auxiliary agent to make the concrete more flexible and reduce shrinkage during setting. Adding the dispersion to concrete mixtures allows also addition of fillers hitherto regarded as toxic to cement.Type: GrantFiled: August 25, 1998Date of Patent: October 3, 2000Inventor: Gerd Thone
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Patent number: 6126850Abstract: A freeze-preventing material comprises cement, salt, and water-absorbing resins. The freeze-preventing material is scattered on the pavement surface in the form of slurry to prevent the pavement surface from freezing. Thereby a freeze-preventing effect is maintained for a long period of time owing to the water-absorbing resins which absorb and retain the salt in large amounts. The anti-freezing effect can be restored by spraying the pavement with the salt again.Type: GrantFiled: October 6, 1998Date of Patent: October 3, 2000Assignee: Showa Denko Kabushiki KaishaInventors: Nobuya Ishioka, Tetsuhiko Yamaguchi, Masaki Sazawa, Kenichi Kitamura
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Patent number: 6117229Abstract: Described herein is the use of a combination of organic additives that is particularly advantageous for the preparation of cementitious compositions having a high conservation of the degree of white, which contain in mass a photocatalyst that is able to oxidize, in the presence of light, air and ambient humidity, pollutant substances present in the environment, the said photocatalyst being, in particular, titanium dioxide prevalently in the form of anatase.The above combination of additives comprises the following: a melamine resin; a cellulose ether; a polymer chosen from among an ethylene polymer, an acrylic polymer, and a terpolymer comprising as co-monomers at least one ester of acrylic acid with an alcohol and at least one ester of vinyl alcohol with a carboxylic acid, or alternatively, an acrylic, styrene or butadiene latex; and a chemically modified starch.Type: GrantFiled: June 17, 1998Date of Patent: September 12, 2000Assignee: Italcement S.p.A.Inventors: Luigi Cassar, Carmine Pepe
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Patent number: 6110271Abstract: In accordance with the present invention, a microbial polysaccharide having the features characteristic of S-657 has been found to be effective to improve the rheological properties of a variety of cementitious systems. Thus, the addition of a small, but effective amount of S-657 to such cementitious systems as portland cement, self-leveling grouts, fresh or saltwater oil well cement slurries, microfine cements, and the like, gives rise to substantial improvements in such properties as bleed, flow resistance, fluid loss control, and the like. S-657 addition provides enhanced rheological control in a variety of cementitious systems. In addition, S-657 provides a number of advantages relative to prior art systems, including improved free water and sedimentation control, as well as reduced fines loss during underwater placement.Type: GrantFiled: September 4, 1997Date of Patent: August 29, 2000Assignee: Pharmacia CorporationInventors: Bryan Skaggs, Walter Rakitsky, Alain Phyfferoen
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Patent number: 6110270Abstract: The moisture content within, and moisture flow in and out of, porous building materials such as masonry, brick, concrete, and mortar, can be affected by coating the building material with polyvinyl alcohol, or by incorporating polyvinyl alcohol into the building material. The resultant control of moisture movement can influence the suction of the building material, leading to improved bonding with adjacent building material, and can also retard efflorescence.Type: GrantFiled: April 22, 1997Date of Patent: August 29, 2000Inventor: Thomas Beckenhauer
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Patent number: 6106608Abstract: The present invention provides a floor patching and leveling compound ingredient which provides a desired, smooth finish for a floor surface, the resultant floor and a method of making the same. In a preferred embodiment of the invention, the component includes about by weight of a dispersing agent, about 0.5 to 1.0% by weight of an alkali tartrate, and about 0.8 to 1.3% by weight of an alkali carbonate with this component being employed in the mortar in a proportion of about up to 6% of the mortar on a weight basis.Type: GrantFiled: May 22, 1997Date of Patent: August 22, 2000Inventors: Gerd Andree, Juergen Bartsch
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Patent number: 6089318Abstract: This invention discloses a polymer composition, a cement slurry containing said polymer composition and a method of using the cement slurry to cement a borehole penetrating a subsurface earth formation wherein the polymer composition is made by polymerizing a vinylamide morpholine derivative with a styrene sulfonic acid salt in the presence of a humate. The polymer composition operates to reduce fluid loss from the cement slurry to the subsurface formation.Type: GrantFiled: August 11, 1999Date of Patent: July 18, 2000Assignee: Fritz Industries, Inc.Inventors: Steven B. Laramay, Rebecca G. Udarbe, Charles R. George
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Patent number: 6085840Abstract: This invention discloses a polymer composition, a cement slurry containing said polymer composition and a method of using the cement slurry to cement a borehole penetrating a subsurface earth formation wherein the polymer composition is made by polymerizing a vinylamide morpholine derivative and at least one branched N-vinylamide derivative in the presence of a humate. The polymer composition operates to reduce fluid loss from the cement slurry to the subsurface formation.Type: GrantFiled: June 5, 1998Date of Patent: July 11, 2000Assignee: Fritz Industries, Inc.Inventors: Steven B. Laramay, Rebecca G. Udarbe
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Patent number: 6073410Abstract: The present invention resides in a wall unit and formulation which is particularly advantageous for the manufacture of prefabricated buildings. The wall unit uses a uniquely formulated exterior wall panel that is bonded to a frame of tri-chord steel beams. The unique cementitious composition of the wall unit allows it to be fire and insect resistant and generally impervious to moisture.Type: GrantFiled: October 14, 1998Date of Patent: June 13, 2000Assignee: Eco Buliding Systems, Inc.Inventors: Michael J. Schimpf, Marcus J. Harrel
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Patent number: 6068697Abstract: A polysaccharide derivative prepared by replacing all or part of the hydroxyl hydrogen atoms of a polysaccharide or polysaccharide derivative by (A) a hydrophobic substituent having a C.sub.8 -C.sub.43 hydrocarbon chain as the partial structure and (B) an ionic hydrophilic substituent having at least one member selected from the group consisting of sulfonic, carboxyl phosphoric, and sulfate groups and salts thereof as the partial structure, wherein the average degree of replacement by the substituent (A) is 0.0001 or above but below 0.001 per constituent monosaccharide residue as determined by Zeisel's method or the diazomethane method and that by the substituent (B) is 0.01 to 2.0 per constituent monosaccharide residue as determined by colloidal titration. This polysaccharide derivative is useful as the admixture for hydraulic materials and can give stable hydraulic compositions excellent in dispersion.Type: GrantFiled: July 14, 1998Date of Patent: May 30, 2000Assignee: Kao CorporationInventors: Hotaka Yamamuro, Takeshi Ihara, Tomohito Kitsuki, Tetsuya Miyajima, Fujio Yamato, Makoto Kohama
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Patent number: 6068696Abstract: A mortar cement composition is composed of a cement or ground portland cement clinker, ground limestone and/or lime, sand, a sufficient amount of water to render the composition flowable, and at least one water-soluble polymer present in the amount having a lower limit of about 0.001 wt % and an upper limit of about 0.04 wt % based on total dry weight of the ingredients, with the proviso that the extent of adsorption of the polymer onto the cement is less than 50%, and wherein the resulting mortar has 8-16% air content and greater than 70 psi flexural bond strength. This mortar cement composition is for use in building structures in all seismic zones.Type: GrantFiled: July 20, 1998Date of Patent: May 30, 2000Assignee: Hercules IncorporatedInventors: Arthur L. Anttila, Sung G. Chu, Thomas J. Podlas, Teng-Shau Young
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Patent number: 6063183Abstract: A superfluidifying composition for cement compositions is described, which contains as superfluidifying additive a salt of the product resulting from sulfonation and oxidation of fuel oils deriving from steam cracking of oil products (FOKS), and an antifoam additive comprising one or more copolymers among ethylene oxide and propylene oxide, etherified at the beginning of the polymeric chain by an alkoxy group R.sub.1 --O, wherein R.sub.1 is an alkyl group, linear or branched, having from 2 to 20 carbon atoms, and whose monomeric terminal units have their oxygen atom bound to a hydrogen atom.Type: GrantFiled: September 22, 1998Date of Patent: May 16, 2000Assignee: Italcementi S.p.A.Inventors: Marco Goisis, Luigi Cassar
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Patent number: 6063184Abstract: The invention relates to a random styrene-maleic anhydride (SMA) copolymer in free acid or salt form wherein the copolymer has the following types and numbers of monomer units ##STR1## in which M is selected from hydrogen, a cation and a residue of a hydrophobic polyalkylene glycol or polysiloxane, R is the residue of methylpoly(ethylene)glycol of molecular weight (weight-average) 900-2000, x=0.35-0.75 and y=0.25-0.65. These copolymers are particularly useful as superplasticizers in cementitious compositions such as concretes and mortars.Type: GrantFiled: May 22, 1998Date of Patent: May 16, 2000Assignee: MBT Holding AGInventors: Bernhard Leikauf, Max Oppliger, Salvatore Valenti
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Patent number: 6048393Abstract: This invention relates to enhancing the compressive strength of cements after 1, 3, 7 and 28 days following hydration and to improving porosity and finished surfaces of the hardened cements and concretes made therefrom. The improved cements are prepared using certain hydroxylamine additives in amounts of up to 0.1% which preferably are added during grinding of the cement in which case the amines further act as grinding aids.Type: GrantFiled: May 26, 1998Date of Patent: April 11, 2000Assignee: W.R. Grace & Co. -Conn.Inventors: Josephine Ho-wah Cheung, David Francis Myers
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Patent number: 6033469Abstract: Injection medium in the form of a dry mixture for preparing an injection suspension for sealing and/or reducing the penetrability of soils (loose rocks) and/or stone and/or structures against penetration by fluids, especially by water and gases, containing at least one mineral binder, especially a superfine binder, at least one stabilizer, at least one solvent and optionally other customary additives, such as at least one setting accelerator, an injection adjuvant and a water-retention agent, while the stabilizer is at least one organic thickener and the mixture additionally includes at least one essentially inert, superfine filler.Type: GrantFiled: February 18, 1998Date of Patent: March 7, 2000Assignee: Dyckerhuff AGInventors: Horst-Dieter Teichert, Reinhard Umlauf
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Patent number: 6022407Abstract: An aqueous concrete mixture having an air pore volume between 10 and 85%, preferably between 20 and 85%. When the aqueous concrete mixture is cured, a concrete having uniform density and high strength is obtained. This is achieved by including in the concrete mixture an aqueous, anionic surface-active compound containing two sulphonic acid groups of the general formula(R).sub.m --R.sub.1 --(SO.sub.3 M).sub.2 (1)wherein R is an aliphatic group having 4-20 carbon atoms, m is a number 1 or 2, the sum of the number of carbon atoms in the 1 or 2 R groups being 6-30, R.sub.1 is an aromatic group containing at least 2 aromatic rings and 10-20 carbon atoms, and M is a cation or hydrogen. The anionic compound has an air-entraining effect and improves the homogeneity of the concrete mixture.Type: GrantFiled: February 4, 1999Date of Patent: February 8, 2000Assignees: Akzo Nobel Surface Chemistry AB, Senad Teknikbetong ABInventors: Kjell Stridh, Ingemar Johansson, Kjell Svedman, Marita Naslund
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Patent number: 6019835Abstract: This invention provides improved cement composition and biodegradable dispersants therefor. The biodegradable dispersants are basically comprised of a high molecular weight, phenolic hydroxy group blocked, alkali metal lignosulfonate.Type: GrantFiled: September 1, 1998Date of Patent: February 1, 2000Assignees: Halliburton Energy Services, Inc., LignoTech U.S.A., Inc.Inventors: Jiten Chatterji, D. Chad Brenneis, Dennis W. Gray, Stuart E. Lebo, Stephen L. Dickman
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Patent number: 6007619Abstract: The present invention relates to a process for preparing mortar/concrete compositions by incorporating into the mortar/concrete compositions either before or during the mixing operation a water-dispersible polyisocyanate whicha) has an average isocyanate functionality of 1.8 to 4.0,b) contains 4.0 to 25.0 wt. % of aliphatically and/or cycloaliphatically bound isocyanate groups (calculated as NCO; molecular weight=42) andc) contains 5 to 80 wt. % of ethylene oxide units present within polyether chains (calculated as C.sub.2 H.sub.4 O; molecular weight=44), in whichd) the polyether chains contain an average of 5 to 50 ethylene oxide units.Type: GrantFiled: December 11, 1997Date of Patent: December 28, 1999Assignee: Bayer AktiengesellschaftInventors: Hans-Josef Laas, Martin Brahm, Jan Mazanek, Hermann Kober, Manfred Schonfelder, Dietbert Knofel, Karl-Georg Bottger, Anke Reinschmidt
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Patent number: 5997633Abstract: A composition for and a method of promoting the flow of a concrete slurry through a pump and a conduit is provided. The composition is a dry particulate mixture comprised of a water soluble, inorganic material and a solvatable, organic polymer. The composition, when mixed with a suitable quantity of water, is useful in a method of priming a pump used to pump a concrete slurry. The composition, when mixed with a concrete slurry, is useful to improve the flow of the slurry through a conduit.Type: GrantFiled: September 5, 1997Date of Patent: December 7, 1999Assignee: Fritz Industries, IncInventor: Daniel P. Montgomery
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Patent number: 5997630Abstract: An accelerating admixture for use with spraying cementitious compositions such as shotcrete comprises (a) a compound selected from aluminium hydroxide, aluminium hydroxysulphate and mixtures thereof, and (b) an acidic substance which essentially does not react with the compound. The preferred acid substances are organic acids.Type: GrantFiled: June 28, 1996Date of Patent: December 7, 1999Assignee: MBT Holding AGInventors: Terye Angelskar, Helmut Gebhardt, Bernhard Leikauf, Valentina Mader
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Patent number: 5997631Abstract: A hardener composition useful for producing shaped cement articles while utilizing wastes such as waste incineration ash or papermaking sludge incineration ash and broken concrete; and a process for producing shaped cement articles by using this hardener composition.The process comprises kneading a hardener composition comprising 4.0 to 13.0 wt. % of sodium carbonate, 5.0 to 10.6 wt. % of potassium carbonate, 5.2 to 11.2 wt. % of sodium chloride, 1.1 to 4.1 wt. % of ammonium chloride, 0.1 to 1.5 wt. % of cobalt chloride, 0.4 to 8.6 wt. % of superplasticizer for concrete formation consisting maily of a polyalkylallyl-sulfonate salt, and 51.0 to 84.2 wt. % of water together with the wastes and cement and shaping and curing. The substances inducing secondary pollution which are contained in the wastes are prevented from dissolving away or exuding from the cement articles.Type: GrantFiled: March 8, 1999Date of Patent: December 7, 1999Assignees: Toho Corporation Co., Ltd., Joban Juki Kensetsu Kabushiki KaishaInventor: Song Yop Cho
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Patent number: 5993537Abstract: In accordance with the present invention, there are provided novel fiber reinforced building material formulations, comprised of an inorganic binding agent and synthetic fibers. The fibrous material employed in invention formulations is capable of undergoing progressive fibrillation upon agitation. As a result, fibers of lower initial aspect ratios, and higher addition rates than previously possible are disclosed, herein. Formulations containing Portland cement-based compositions and fibrillating synthetic fibers are also contemplated. In addition, there are provided methods of producing fiber reinforced building materials, including Portland cement-based compositions, and articles produced therefrom.Type: GrantFiled: March 11, 1998Date of Patent: November 30, 1999Assignee: Dalhousie UniversityInventors: Jean-Francois Trottier, Michael Mahoney
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Patent number: 5989334Abstract: Self-repairing, fiber reinforced matrix materials include a matrix material including inorganic as well as organic matrices. Disposed within the matrix are hollow fibers having a selectively releasable modifying agent contained therein. The hollow fibers may be inorganic or organic and of any desired length, wall thickness or cross-sectional configuration. The modifying agent is selected from materials capable of beneficially modifying the matrix fiber composite after curing. The modifying agents are selectively released into the surrounding matrix in use in response to a predetermined stimulus be it internal or externally applied. The hollow fibers may be closed off or even coated to provide a way to keep the modifying agent in the fibers until the appropriate time for selective release occurs.Type: GrantFiled: August 22, 1997Date of Patent: November 23, 1999Inventor: Carolyn M. Dry
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Patent number: 5989336Abstract: A cement slurry composition suitable for well bore cementation is provided containing as an essential component a synthetic hectorite clay in amount sufficient to reduce free water formation and solids segregation.Type: GrantFiled: July 8, 1997Date of Patent: November 23, 1999Assignee: Atlantic Richfield CompanyInventors: Robert B. Carpenter, J. Benjamin Bloys, David L. Johnson
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Patent number: 5988279Abstract: This invention discloses a composition and a method of using the composition to cement a borehole penetrating a subsurface earth formation. The composition, the random polymerization product of two or three different vinyl-containing monomers including a vinylamide morpholine derivative, operates to reduce fluid loss from the cement slurry used to cement the borehole to the subsurface formation.Type: GrantFiled: November 5, 1997Date of Patent: November 23, 1999Assignee: Fritz Industries, Inc.Inventors: Rebecca G. Udarbe, Kim Hancock-Grossi
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Patent number: 5981630Abstract: Fiber additives for addition to proportioned concrete comprise a plurality of thermoplastic fibers having a profile geometry defined by the equation, ##EQU1## wherein the amplitude a.sub.0 falls within a range of from about 0.1 d.sub.f to 2.0 d.sub.f and the period .lambda. falls within a range of from about 2 d.sub.f to 15 d.sub.f for fibers having a diameter d.sub.f of from about 0.5 to about 1 mm; the peak pull-out stress .sigma..sub.peak and the specific pull-out energy absorbed to a maximal displacement of 7.5 mm .psi..sub.peak, both increase linearly with a deformity factor defined by the equation, ##EQU2## where .alpha.=0.8 and .beta.=-1, such that the peak pull-out stress is defined by the equation, ##EQU3## and the specific pull-out energy is defined by the equation, ##EQU4## the fiber additives having an optimimum deformity,D.sub.optimum .apprxeq.(0.5 to 1)D.sub.critical,D.sub.critical being that deformity where the ultimate tensile strength of the fiber equals k.sub.1 D.sub.Type: GrantFiled: January 14, 1998Date of Patent: November 9, 1999Assignee: Synthetic Industries, Inc.Inventors: Nemkumar Banthia, Richard E. Hingson, Ashish Dubey
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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: 5948157Abstract: The invention is directed at an additive for incorporation into a cementitious compound comprising Portland cement and water prior to the setting of the compound. The additive is comprised of a surface treated additive wherein the surfaces of the additive are treated with a substance which has a transient hydrophobic effect on the additive, which effect temporarily renders the additive more hydrophobic for a time period following the incorporation of the additive into the compound such that the water comprising the compound is less attracted to the additive during the placement of the compound and is thus available to provide workability to the compound, and such that the additive regains its natural properties following placement of the compound in order to permit the additive to participate with the compound during the curing of the compound. The invention is also directed at a process for preparing the additive and a process for preparing a cementitious compound comprised of the additive.Type: GrantFiled: December 10, 1996Date of Patent: September 7, 1999Assignee: Fording Coal LimitedInventors: Colin J. McKenney, Mikhail Pildysh, Donald J. Shyluk
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Patent number: 5938835Abstract: A cement admixture comprised of a mixture of certain alkyl ether oxyalkylene adducts with certain oxyalkylene glycols to provide cement compositions of mortar and concrete which inhibit drying shrinkage while permitting substantial air entrainment and enhanced compressive strength.Type: GrantFiled: October 15, 1997Date of Patent: August 17, 1999Assignee: W. R. Grace & Co.-Conn.Inventors: Edward T. Shawl, Haven S. Kesling, Jr.
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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: 5925184Abstract: A cement composition excelling in the slump retaining property which comprises at least cement admixture comprising as a main ingredient thereof (I) a copolymer (A) of short-chain polyalkylene glycol (meth)acrylate (a), a long-chain polyalkylene glycol (meth)acrylate (b), a carboxylic acid monomer (c), and a monomer copolymerizable with the monomers mentioned above or a salt of the copolymer (B), (II) a copolymer (A.sub.1) of the monomers (a), (c), and (d) mentioned above or a salt thereof, (III) a mixture of a copolymer (A.sub.1) of the monomers (a), (c), and (d) mentioned above or a salt (B.sub.1) of thereof with a known cement admixture, or (IV) a polycarboxylic acid based polymer (A.sub.3) manifesting to a calcium sulfoaluminate based expansive additive an adsorption ratio of not less than 90% in 5 minutes at room temperature when added in an amount of 0.1% by weight as solids or a salt (B.sub.Type: GrantFiled: February 21, 1997Date of Patent: July 20, 1999Assignee: Nippon Shokubai Co., Ltd.Inventors: Tsuyoshi Hirata, Tsutomu Yuasa, Toru Uno, Koichiro Nagare, Hideyuki Tahara, Shogo Iwai
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Patent number: 5925182Abstract: A stable liquid suspension composition comprising a liquid carrier, a solid fatty acid or a salt thereof, and a solid particulate is disclosed wherein said liquid carrier is selected from the group consisting of oils, olefins, terpenes, glycols, esters, ethers, alcohols, and combinations of any two or more thereof and said liquid carrier, solid fatty acid or salt thereof, and solid particulate are each present in said composition in a stabilizing amount sufficient to produce a stable liquid suspension. Also disclosed is a stable liquid composition comprising a liquid carrier, an oil-soluble polymer, and a solid particulate wherein said liquid carrier is selected from the group consisting of olefins, terpenes, esters, and combinations of any two or more thereof and said liquid carrier, oil-soluble polymer, and solid particulate are each present in said composition in a stabilizing amount sufficient to effect the formation of a stable liquid suspension.Type: GrantFiled: July 16, 1998Date of Patent: July 20, 1999Assignee: Phillips Petroleum CompanyInventors: Bharat B. Patel, Marshall D. Bishop
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Patent number: 5922124Abstract: An additive for, a method of adding thereof to uncured mixes for and resulting cured cement-type concreations such as cured embodiments of concrete, marcadam, and roof-top shingles each exhibiting improved heat and freeze-thaw durability resulting from reduced efflorescence and stability against sun ultraviolet light exposure.Type: GrantFiled: September 12, 1997Date of Patent: July 13, 1999Inventor: William W. Supplee
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Patent number: 5919300Abstract: Cement dispersing agents for self-compacting concrete of high flowability, comprising a water-soluble N-vinyl copolymer, prepared by copolymerizing (a) an N-vinyl-lactame or -amide with (b) a polyethylene glycol ester of maleic acid containing 6 to 240 moles of oxyethylene groups per molecule and (c) at least one monomer selected from among unsaturated dicarboxylic acids and (d) methallylsulfonic acid. When an aqueous solution of this copolymer is used as an admixture to freshly prepared concrete of even extremely low water-to-cement ratio, a high fluidity, a low decrease in flowability with the progression of time and a lack of segregation over time is attained.Type: GrantFiled: October 27, 1997Date of Patent: July 6, 1999Assignee: Sika AG. vorm. Kaspar Winkler & Co.Inventors: Theodor A. Burge, Ueli Sulser, Jurg Widmer, Anna Krapf-Huber
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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: 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: 5911820Abstract: A concrete admixture is provided, which is effective in imparting fluidity to a hydraulic composition such as cement paste, mortar or concrete, particularly in maintaining the fluidity of the composition and which hardly retards the hardening property of the composition. The concrete admixture comprises a copolymer comprising, as structural units, units derived from an ethylenically unsaturated monomer (a) having 25 to 300 moles of C.sub.2 -C.sub.3 oxyalkylene groups per mole of copolymer and units derived from a monomer (b) of an alkyl, alkenyl or hydroxyalkyl ester of an ethylenically unsaturated mono- or di-carboxylic acid.Type: GrantFiled: February 20, 1998Date of Patent: June 15, 1999Assignee: Kao CorporationInventors: Haruyuki Satoh, Fujio Yamato, Yoshinao Kono, Sayuri Nakamura