Sulfur Containing (e.g., Alum, Etc.) Patents (Class 106/736)
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Patent number: 9034099Abstract: The present invention relates to a novel cement which makes possible the preparation of concrete, grout or mortar which is resistant to internal sulfate reactions and to external sulfate attacks, and also the use of this cement for the preparation of concrete, grout or mortar.Type: GrantFiled: November 24, 2011Date of Patent: May 19, 2015Assignee: VICATInventors: Laetitia Bessette, Francois Hue, Martine Pasquier
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Patent number: 9023151Abstract: The present invention is mainly aimed at a set-accelerating admixture for hydraulic compositions comprising, in an aqueous solution, the reaction product of an alkanolamine with a concentrated strong acid; sulfate anions; and alkali or alkaline earth cations; having a pH comprised between 5 and 12. Moreover it is directed to a method for its preparation as well as to a method for preparing hydraulic compositions comprising the step for adding such an admixture to the hydraulic binder, before, during or after the grinding.Type: GrantFiled: February 6, 2013Date of Patent: May 5, 2015Assignee: ChrysoInventors: Bruno Pellerin, David Babayan, Frédéric Rudolph
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Publication number: 20150107492Abstract: A hydraulic binder includes a Portland clinker having a Blaine specific surface of 4000 to 5500 cm2/g, from 2.5 to 8% of sulphate expressed by mass of SO3 relative to the mass of clinker, from 1.5 to 10% of calcium nitrite and/or calcium nitrate expressed as anhydrous mass relative to the mass of clinker and from 15 to 50% of a mineral addition including calcium carbonate by mass relative to the total mass of binder.Type: ApplicationFiled: May 21, 2013Publication date: April 23, 2015Inventors: Serge Sabio, Serge Ghilardi, Xiaolin Pardal, Michel Testud
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Patent number: 8859719Abstract: Use of a non-ionic surfactant in the preparation of modified sulfur and/or modified sulfur cement that may or may not be modified sulfur concrete.Type: GrantFiled: April 21, 2009Date of Patent: October 14, 2014Assignee: United Arab Emirates UniversityInventors: Abdel-Mohsen Onsy Mohamed, Maisa Mabrouk El Gamal
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Publication number: 20140238274Abstract: The present invention relates to a method for accelerating the hardening of hydraulic or latent hydraulic binders, wherein ternesite and an aluminum component are added to the binder, and relates to an additive that increasing early strength for hydraulic or latent hydraulic binders that contain ternesite and a non-hydraulically reactive aluminum component, and relates to the use of an additive comprising ternesite and an aluminum component for the purpose of accelerating the hardening of hydraulic or latent hydraulic binders.Type: ApplicationFiled: July 16, 2012Publication date: August 28, 2014Applicant: HEIDELBERGCEMENT AGInventors: Frank Bullerjahn, Dirk Schmitt, Mohsen Ben Haha
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Publication number: 20140230696Abstract: The present invention relates to the production of ternesite clinkers containing 20 to 100% by weight C5S2$ and less than 15% by weight C4A3$, and to the use of ternesite as an additive to Portland cement or Portland composite cement, and to a binder containing 20 to 95% by weight Portland cement (clinker) and 80 to 5% by weight ternesite (clinker).Type: ApplicationFiled: July 16, 2012Publication date: August 21, 2014Applicant: HEIDELBERGCEMENT AGInventors: Frank Bullerjahn, Dirk Schmitt, Mohsen Ben Haha, Barbara Batog, Linda Irbe
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Publication number: 20140199488Abstract: Process for the preparation of a sprayable inorganic binder composition containing as main components water, aggregates, inorganic binder, set accelerator, characterized in, that a cement hydrate products containing component is added before and/or at the spray nozzle.Type: ApplicationFiled: November 22, 2011Publication date: July 17, 2014Applicant: CONSTRUCTION RESEARCH & TECHNOLOGY GMBHInventors: Montserrat Alfonso, Elena Kolomiets
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Publication number: 20140174325Abstract: A process for the production of a hydraulic binder, includes co-grinding a clinker and 0.1 to 5% by dry mass relative to the mass of clinker, of a material including more than 15% by mass of calcium silicate hydrate relative to the solid fraction of the material.Type: ApplicationFiled: July 13, 2012Publication date: June 26, 2014Applicant: LAFARGEInventors: Xiaolin Pardal, Pascal Dion
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Patent number: 8623135Abstract: A method of cementing in a subterranean formation comprising the steps of: (A) introducing a cement composition into the subterranean formation, the cement composition comprising: (i) cement; (ii) water; and (iii) a high-density additive selected from the group consisting of silicon carbide, sintered bauxite, and any combination thereof, wherein the cement composition has a density of at least 16 pounds per gallon; and (B) allowing the cement composition to set. According to an embodiment, the high-density additive is in a concentration of at least 30% by weight of the cement. A cement composition for use in an oil or gas well comprises: (A) cement; (B) water; and (C) a high-density additive selected from the group consisting of silicon carbide, sintered bauxite, and a combination thereof, wherein the high-density additive is in a concentration of at least 30% by weight of the cement, and wherein the cement composition has a density of at least 16 pounds per gallon.Type: GrantFiled: February 7, 2013Date of Patent: January 7, 2014Assignee: Halliburton Energy Services, Inc.Inventors: Rahul Chandrakant Patil, Sandip Prabhakar Patil, Keith Armstrong
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Patent number: 8596363Abstract: A cement composition for cementing an oil or gas well includes Portland cement, water and a sulfur component. The cement composition may be used to cement a well bore by creating a cement slurry including the sulfur component, pumping the slurry into the well bore to a selected location and allowing it to solidify.Type: GrantFiled: August 8, 2012Date of Patent: December 3, 2013Assignee: Sanjel Limited PartnershipInventors: Amir Mahmoudkhani, Neil Warrender
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Publication number: 20130255948Abstract: Well-cementing compositions for use in high-pressure, high-temperature (HPHT) wells are often densified, and contain weighting agents such as hematite, ilmenite, barite and hausmannite. The weighting agents are usually finely divided to help keep them suspended in the cement slurry. At high temperatures, finely divided weighting agents based on metal oxides react with the calcium-silicate-hydrate binder in set Portland, cement, leading to cement deterioration. Finely divided weighting agents based on metal sulfates are inert with respect to calcium silicate hydrate; consequently, set-cement stability is preserved.Type: ApplicationFiled: December 7, 2011Publication date: October 3, 2013Inventors: Michel Michaux, Laurent Gabilly
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Patent number: 8435342Abstract: A concrete composition comprising a mouldable mixture of aggregate, binder and liquid vehicle, wherein the aggregate comprises sulphur concrete-derived aggregate and wherein the binder comprises hydraulic binder. The use of crushed sulphur concrete as aggregate in cement-based concrete reduces the hardening time of the concrete.Type: GrantFiled: December 15, 2010Date of Patent: May 7, 2013Assignee: Shell Oil CompanyInventors: Marwa Al-Ansary, Parilakathoottu Aboobacker Sunifar, Guy Lode Magda Maria Verbist
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Publication number: 20120272871Abstract: A concrete composition comprising a mouldable mixture of aggregate, binder and liquid vehicle, wherein the aggregate comprises sulphur concrete-derived aggregate and wherein the binder comprises hydraulic binder. The use of crushed sulphur concrete as aggregate in cement-based concrete reduces the hardening time of the concrete.Type: ApplicationFiled: December 15, 2010Publication date: November 1, 2012Inventors: Marwa Al-Ansary, Parilakathoottu Aboobacker Sunifar, Guy Lode Magda Maria Verbist
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Patent number: 8298328Abstract: A novel amorphous divalent metal ion salt for enhancing the manageability of a Portland cement and its application in dental field are disclosed. Typical formula (I), (II), or (III) of this amorphous metal ion salt are shown as following: M 2 + ? A x - ? B 2 - x - ( I ) M 2 + ? A y 2 - ? C ( 4 - y ) 4 2 - ( II ) M 2 + ? A z 3 - ? D ( 6 - z ) 9 3 - ( III ) wherein, M2+, A?, B?, C?2, D?3, x, y, and z are defined the same as the specification. A novel tooth filling material comprises: a Portland cement, a bone substitute substance, and an amorphous divalent metal ion salt with formula of (I), (II), or (III). In addition, a novel root canal filling material comprises: a Portland cement, a radiopaque substance, and an amorphous divalent metal ion salt with formula of (I), (II), or (III).Type: GrantFiled: December 1, 2009Date of Patent: October 30, 2012Assignee: Taipei Medical UniversityInventors: Jeng-Chang Yang, Pei-Ying Lee, Dian-Yu Ji, Nai-Chia Teng, Sung-Chih Hsieh, Sheng-Yang Lee
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Patent number: 8268072Abstract: A cement composition for cementing an oil or gas well includes Portland cement, water and a sulfur component. The cement composition may be used to cement a well bore by creating a cement slurry including the sulfur component, pumping the slurry into the well bore to a selected location and allowing it to solidify.Type: GrantFiled: February 27, 2009Date of Patent: September 18, 2012Assignee: Sanjel Limited PartnershipInventors: Amir Mahmoudkhani, Neil Warrender
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Patent number: 8246742Abstract: The invention concerns an accelerator mixture which contains aluminum in oxidation state 3, sulphate and hexafluorosilicic acid, a process for the preparation of said accelerators and the use of said accelerators for the coating of substrates with concrete or mortar. Furthermore the invention relates to concrete or mortar containing accelerators according to the invention and the hardened layers produced by applying the accelerators to concrete or mortar. The invention relates also to the use of hexafluorosilicic acid as a stabilizer.Type: GrantFiled: December 3, 2009Date of Patent: August 21, 2012Assignee: Construction Research & Technology GmbHInventors: Elena Kolomiets, Montserrat Alfonso, Martin Weibel
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Publication number: 20120152541Abstract: Well-cementing compositions for use in high-pressure, high-temperature (HPHT) wells are often densified, and contain weighting agents such as hematite, ilmenite, barite and hausmannite. The weighting agents are usually finely divided to help keep them suspended in the cement slurry. At high temperatures, finely divided weighting agents based on metal oxides react with the calcium-silicate-hydrate binder in set Portland cement, leading to cement deterioration. Finely divided weighting agents based on metal sulfates are inert with respect to calcium silicate hydrate; consequently, set-cement stability is preserved.Type: ApplicationFiled: December 4, 2011Publication date: June 21, 2012Inventors: Laurent Gabilly, Michel Michaux
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Patent number: 8142564Abstract: A method for producing a cement-containing material having a low content of soluble Cr (VI), the method including providing a cement-containing material with metallic sulphate particles coated with at least one product of the hydrolysis of a collagen material.Type: GrantFiled: May 6, 2008Date of Patent: March 27, 2012Assignee: LafargeInventors: Hélène Debegnac, Christelle Sing
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Patent number: 8092590Abstract: The invention relates to a mineral, hydraulic binder for producing concrete or mortars or cement suspensions, based on at least one cement. The cement comprises clinker phases such as, C3S, C2S, C3A, and C4AF, which on reaction with water form hydrate phases that cure to form hardened cement. The cement displays a delay phase after mixing with water of some hours, e.g. from 4 to 8 hours, during which time no appreciable curing reaction takes place. The binder further comprises at least one finely divided SiO2 component and at least one finely divided CaO component, which react with make-up water during the delay phase to form calcium silicate hydrate phases that cure as a result of a pozzolanic reaction and produce early strength.Type: GrantFiled: August 19, 2008Date of Patent: January 10, 2012Assignee: Dyckerhoff AGInventors: Frank Parker, Josef Strunge, Thomas Deuse
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Publication number: 20110226163Abstract: The invention has an object to provide a heavyweight fine aggregate and a heavyweight aggregate for a stiff heavyweight concrete having a slump of 0 to 3 cm, in which segregation from the cement paste is unlikely to occur, and to provide a stiff heavyweight concrete having a slump of 0 to 3 cm, using the heavyweight fine aggregate and heavyweight aggregate. The heavyweight fine aggregate comprises no less than 20 wt % of aggregate having a particle size smaller than 0.15 mm, and no less than 20 wt % of aggregate having a particle size from 2.5 mm to less than 5 mm. The above feature allows effectively inhibiting segregation between the aggregate and cement paste when blending the aggregate into the heavyweight concrete, and allows effectively increasing the filling rate in boxes when blending the aggregate into the heavyweight concrete for box filling.Type: ApplicationFiled: May 31, 2011Publication date: September 22, 2011Applicant: Taiheiyo Cement CorporationInventors: Minoru Yoshimoto, Yasuhide Higo, Eichi Manabe
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Patent number: 7892342Abstract: A white, substantially non-iron containing dental material formed from Portland cement. The material may be a dental cement, dental restorative or the like.Type: GrantFiled: August 27, 2009Date of Patent: February 22, 2011Assignee: DENTSPLY International, Inc.Inventor: Carolyn M. Primus
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Publication number: 20100294170Abstract: A method for producing multi-component cements with the following procedural steps: one component B of the multi-component cement is ground in a grinding installation MB; Portland cement is ground as component A in a cement grinding installation MA; the mechanically discharged grinding stock of the grinding installation MB is supplied to the inlet of a dynamic classifier with adjusted separation cut; the Portland cement is also supplied to the inlet of the dynamic classifier of the grinding installation MB, and the oversized material of the dynamic classifier of the grinding installation MB is recycled to the inlet of the grinding installation MB, whereas the fine product of the dynamic classifier forms the multi-component cement.Type: ApplicationFiled: September 23, 2008Publication date: November 25, 2010Applicant: HOLCIM TECHNOLOGY LTDInventors: Paul Clemens, Dietmar Espig
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Patent number: 7819970Abstract: Provided is a protective concrete for weaken the intensity of proton radiation, and it is prepared by mixing 525# cement 500-700 Kg; barite sand 1000-1400 kg, barite stone 1500-1800 Kg, lead powder 180-200 Kg and water 170-180 Kg. The barite that can absorb the proton radiation is used, so the present concrete is much better than conventional concretes in weakening the proton radiation, and 1.5 m-thick wall without lead plates which is prepared with the present concrete can achieve the same effect on weakening the proton radiation with a conventional 2 m-thick wall covering with lead plates.Type: GrantFiled: July 20, 2007Date of Patent: October 26, 2010Inventors: Yingzhi Lv, Yingren Lv, Yan Lv, Qiang Lv, Yongsheng Gao
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Publication number: 20090277357Abstract: The invention relates to a mineral, hydraulic binder for producing concrete or mortars or cement suspensions, based on at least one cement. The cement comprises clinker phases such as, C3S, C2S, C3A, and C4AF, which on reaction with water form hydrate phases that cure to form hardened cement. The cement displays a delay phase after mixing with water of some hours, e.g. from 4 to 8 hours, during which time no appreciable curing reaction takes place. The binder further comprises at least one finely divided SiO2 component and at least one finely divided CaO component, which react with make-up water during the delay phase to form calcium silicate hydrate phases that cure as a result of a pozzolanic reaction and produce early strength.Type: ApplicationFiled: August 19, 2008Publication date: November 12, 2009Inventors: Frank Parker, Josef Strunge
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Publication number: 20090241803Abstract: A cement composition for cementing an oil or gas well includes Portland cement, water and a sulfur component. The cement composition may be used to cement a well bore by creating a cement slurry including the sulfur component, pumping the slurry into the well bore to a selected location and allowing it to solidify.Type: ApplicationFiled: February 27, 2009Publication date: October 1, 2009Applicant: SANJEL LIMITED PARTNERSHIPInventors: Amir MAHMOUDKHANI, Neil WARRENDER
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Publication number: 20090194005Abstract: A cementitious composition capable of forming high early strength cement when admixed with water may comprise, for each 100% by weight, no more than about 60% by weight C3S, at least about 4% by weight C2S, and between about 7% and about 11% by weight SO3, wherein the cementitious composition has a particle size distribution such that substantially all of its particles are of a size of about 10 microns or smaller. A cementitious composition may have a ratio of weight % SO3 to weight % Al2O3 of at least about 1.5 and a particle size distribution such that substantially all of its particles are of a size of about 10 microns or smaller. An apparatus and method for making such a cementitious composition are also described.Type: ApplicationFiled: February 4, 2008Publication date: August 6, 2009Inventors: Louis U. Spellman, Jose Garcia
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Publication number: 20090007834Abstract: A concrete formulation, which undergoes controlled deterioration in water, that can be used for making anchors for releasably tethering submarine devices at the seabed. The anchor may have handles for a device release mechanism or a central hole for a central device release mechanism. The formulation includes additives, which cause the cement to transform into non-binding Thaumasite over a pre-set period of time, leaving only natural material on the seafloor.Type: ApplicationFiled: October 7, 2005Publication date: January 8, 2009Inventors: Svein Ellingsrud, Audun Sodal, Hans Rechsteiner, Harald Justnes, Kare Ingvar Johansen
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Patent number: 7335253Abstract: The invention provides a process for preparing a sulphur cement product comprising the following steps: (a) selectively oxidising hydrogen sulphide to elemental sulphur by contacting, in a reaction zone, a hydrogen sulphide containing feed gas and a molecular-oxygen containing gas with a particulate oxidation catalyst under selective oxidation conditions; (b) discharging a stream comprising liquid and/or solid elemental sulphur and particulate oxidation catalyst from the reaction zone; (c) admixing the stream comprising elemental sulphur and particulate oxidation catalyst with at least any one of elemental sulphur, a sulphur cement filler, a sulphur cement modifier, or aggregate at a temperature at which sulphur is molten; (d) solidifying the mixture obtained in step (c) by cooling it to a temperature below the melting temperature of sulphur to obtain the sulphur cement product.Type: GrantFiled: March 29, 2006Date of Patent: February 26, 2008Assignee: Shell Oil CompanyInventors: Carolus Matthias Anna Maria Mesters, Marinus Johannes Reynhout, Guy Lode Magda Maria Verbist
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Patent number: 7326478Abstract: The invention concerns a plate whereof the body comprises a binder containing Portland cement, a sulphoaluminous clinker and a calcium sulphate source: the binder comprises, by weight 30 to 80% of Portland cement, 20 to 70% of sulphoaluminous binder, 5 to 20% of a calcium sulphate source, and 0.4 to 7% of a water-reducing plasticizer or highly waterreducing superplasticizer admixture; it contains light aggregates in an amount such that the final density is close to 1, of the order of 0.8 to 1.5.Type: GrantFiled: June 6, 2002Date of Patent: February 5, 2008Assignee: BPB PLCInventors: Patrice Bouscal, Frédéric Chantereau, Adrien Colombet, legal representative, Christian Derusco, Bruno Le Rolland, Gilbert Noworyta, Pierre Colombet, deceased
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Patent number: 7296626Abstract: Methods for cementing and cement compositions are provided, wherein the cement composition comprises cementitious material and an aqueous suspension of zeolite and a chromate reducing agent.Type: GrantFiled: November 8, 2005Date of Patent: November 20, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Karen Luke, Roger S. Cromwell
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Patent number: 7005007Abstract: A hydraulic binder includes cement as main ingredient, and a mixture added to the cement and made of moist green vitriol and a drying agent selected from the group consisting of dry sand with a granulation between 0.1 mm and 0.4 mm, catalytic dust, silica gel and alumina.Type: GrantFiled: September 18, 2003Date of Patent: February 28, 2006Inventor: Alexander Kehrmann
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Publication number: 20040211341Abstract: The present invention concerns cementing compositions for an oil well or the like, based on a Portland cement, silica and alumina, wherein the mineralogical composition of the cement matrix is included in the Si—Ca—Al triangle in one of the margarite-haüyne-[epidote/pumpellyite], haüyne-prehnite-[epidote/pumpellyite] and haüyne-prehnite-pectolite composition triangles. More particularly, the cementing compositions of the invention are suitable for cementing wells subjected to high temperatures and to chemical attack by brines, and are more suitable when the brine—or a saline formulation close to that of the brine—is used as the mixing water.Type: ApplicationFiled: February 6, 2003Publication date: October 28, 2004Inventors: Veronique Barlet-Gouedard, Bruno Goffe
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Patent number: 6740156Abstract: A hydraulic binder, includes cement, and a mixture added to the cement and made of moist green vitriol and an inert carrier substance in the form of silica gel or alumina.Type: GrantFiled: February 10, 2003Date of Patent: May 25, 2004Assignee: Ferro-Duo GmbHInventor: Alexander Kehrmann
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Publication number: 20040035328Abstract: A non-efflorescing cementitious body is formed from sources of calcium aluminate, calcium silicate, calcium sulphate and reactive silica, these ingredients being present in such relative proportions that, upon hydration, both monosulphate (C3A.Cŝ.12H) and hydrated alumina (AH3) are formed. Also disclosed is a hydraulic binder and a paste from which such bodies can be formed and a method for forming such bodies. In addition to exhibiting low efflorescence, these bodies retain satisfactory physical properties, especially good durability to natural weathering conditions.Type: ApplicationFiled: June 27, 2003Publication date: February 26, 2004Inventors: Anastasia George Constantinou, Colin Dow, Charles Hubert Fentiman, Mary Ruth Hoy, Karen Louise Scrivener
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Publication number: 20040025751Abstract: A hydraulic binder, includes cement, and a mixture added to the cement and made of moist green vitriol and an inert carrier substance in the form of silica gel or alumina.Type: ApplicationFiled: February 10, 2003Publication date: February 12, 2004Applicant: KLAUS KEHRMANN GMBH,Inventor: Alexander Kehrmann
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Patent number: 6682595Abstract: The present invention relates to settable compositions for general purpose concrete construction containing Class-F fly ash, Class-C fly ash or slag, and potassium sulfate (K2SO4) as a substantial replacement for Portland cement conventionally used in such compositions. The potassium sulfate is an additive for improved high early strength and accelerated setting times, thereby allowing the concrete structure to be put into service sooner, reducing labor cost, and allowing precast concrete and concrete masonry manufacturers to achieve rapid form and mold turnover.Type: GrantFiled: September 12, 2002Date of Patent: January 27, 2004Inventor: Ronald Lee Barbour
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Patent number: 6641659Abstract: The invention relates to an additive made up of chemical substances, non toxic for the human being neither for the environment, that stabilizes the attle without necessity of cooking neither compression, applicable for constructions/buildings in general, and specially, for housings of social interest, to be resistant, economic, stable, acoustic, thermal, etc. The material for construction including this additive, as well as its preparation process are also disclosed.Type: GrantFiled: May 30, 2001Date of Patent: November 4, 2003Inventors: Eduardo Amado Obregon Pena, Gerasim Seredin Storb
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Publication number: 20030121661Abstract: Methods and compositions for sealing subterranean zones penetrated by well bores are provided. The methods basically comprise the steps of introducing a sealing composition into the subterranean zone comprised of a hydraulic cement, sufficient water to form a slurry and a rapidly acting thixotropy providing gelling agent, and allowing the sealing composition to remain at rest in the zone whereby the sealing composition rapidly gels and then sets into a hard impermeable mass therein.Type: ApplicationFiled: December 11, 2001Publication date: July 3, 2003Inventors: B. Raghava Reddy, Karen Luke
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Patent number: 6565647Abstract: A cementitious shotcrete composition comprising a blend of the following range of ingredients in the following percentages by weight: cement 50% to 99% zeolite 0.3% to 49.3% barite 0.7% to 49.Type: GrantFiled: June 13, 2002Date of Patent: May 20, 2003Assignee: Shieldcrete Ltd.Inventors: Wilfred J. Day, Richard G. Parker, Frank M. MacNeil
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Patent number: 6423133Abstract: The present invention relates to an aqueous suspension comprising: A) silica and/or alumina particles, and B) a compound of overall formula (I): Al(OH)a(SO4)b(SiOx)c(Y)d (I) with: a between 0.1 and 2, b between 0.3 and 1.5, c between 0 and 0.1, d greater than 0.05, Y chosen from alkali metals and alkaline earth metals, x between 2 and 4, and its derivatives, the said compound (B) being present in the suspension at a concentration of at least 1.65 mol/l, expressed as moles of aluminium issued from the said compound. Another subject-matter of the invention is a process useful for the preparation of the said suspension and its use in the field of cement pastes, mortars and concretes and in particular as setting and hardening accelerating agent for cements.Type: GrantFiled: June 15, 2000Date of Patent: July 23, 2002Assignee: Rhodia ChimieInventors: Sylvie Touzet, Jean-Yves Chane-Ching, Evelyne Prat
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Patent number: 6238476Abstract: A method of reducing the curing time of drywall joint compound, and thereby reducing the time required to finish drywall joints or to repair plaster walls, includes adding a predetermined amount of a drying agent to a conventional ready-mixed drywall joint compound. The drying agent preferably comprises at least one compound selected from the group of compounds consisting of plaster of Paris, calcium carbonate, gypsum, crystallized silicon dioxide (quartz), Portland cement, perlite, lime, hydroxy ethyl ether of cellulose, polyvinyl alcohol, starch, wood fiber, potassium naphthalene sulfon, aluminum sulfate, sodium citrate, ammonium tartrate, hydrolyzed protein, monosodium phosphate, sodium naphthalene sulfonate, potassium sulfate and various trace materials, or mixtures thereof A sufficient amount of water is added to the drying agent to facilitate mixing the drying agent with the drywall joint compound to form a joint compound mixture.Type: GrantFiled: June 15, 1999Date of Patent: May 29, 2001Inventor: Mark A. Sprinkle
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Patent number: 6149724Abstract: A method of manufacturing cements based on calcium sulfoaluminate by forming a clinker through calcining a selection of typical cement precursor raw materials to temperatures of more than 1200.degree. C. in an industrial kiln, preferably with a preheater (typically of the cascading cyclone type) and precalciner, selected in such a manner that the clinker thus produced has a high content of calcium sulfoaluminate, tricalcium silicate and dicalcium silicate with no other calcium aluminates and, preferably during or prior to the grinding thereof, adding to the clinker thus produced (with the above recited basic components), effective amounts of calcium oxide or hydroxide and calcium sulfate, in order to activate said clinker. Upon said grinding, a temperature of about 100 to 125.degree. C.Type: GrantFiled: December 4, 1996Date of Patent: November 21, 2000Assignee: Cemex, S.A. de C.V.Inventors: Ramon Poo Ulibarri, Waltter Lopez Gonzalez, Jose Torres
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Patent number: 6053857Abstract: A method and a mixture for chemically stabilizing electric arc furnace dust (EAFD) containing thallium by entrapping the metals inherent in EAFD within a cementitiously hardened product from the mixture. The method includes using the pozzolanic characteristics of EAFD by forming a mixture of EAFD with sufficient water, ferrous sulfate, and Portland cement, then permitting the mixture to react to form a product having a decreased concentration of thallium in its leachate. The method may also include permitting the mixture to form a cementitiously hardened product. The composition of the present invention is the mixture of EAFD, water, ferrous sulfate, and Portland cement. Even immediately after forming the mixture and before hardening, the composition has acceptable leachate characteristics. The hardened product also has acceptable leachate concentrations.Type: GrantFiled: May 15, 1998Date of Patent: April 25, 2000Assignee: Conversion Systems, Inc.Inventor: John Y. Stevens
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Patent number: 6033467Abstract: A method of making cement from base metal smelter slag produced by nickel, copper, lead or zinc smelter, includes grinding the slag with clinker and blast furnace slag to a size in the range of from about -250 to about 425 mesh to produce ground slag cement, and mixing the ground slag cement with Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.Type: GrantFiled: May 8, 1998Date of Patent: March 7, 2000Assignee: Fenicem Minerals Inc.Inventor: David Krofchak
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Patent number: 5972103Abstract: The present invention provides universal well cement additives and methods. The universal well cement additives improve the properties of a well cement slurry and are basically comprised of iron chloride, an alkali or alkaline-earth metal halide, an organic acid and a hydratable polymer.Type: GrantFiled: January 26, 1998Date of Patent: October 26, 1999Assignees: Halliburton Energy Services, Inc., Atlantic Richfield CompanyInventors: Sudhir Mehta, Richard C. Jones, William J. Caveny, Rickey L. Morgan, Dennis W. Gray, Jiten Chatterji
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Patent number: 5968255Abstract: The present invention provides universal well cement additives and methods. The universal well cement additives improve the properties of a well cement slurry and can be comprised of iron chloride, a dispersing agent, an organic acid, a hydratable polymer and an ultra-fine particulate hydraulic cement.Type: GrantFiled: January 12, 1999Date of Patent: October 19, 1999Assignees: Halliburton Energy Services, Inc., Atlantic Richfield CompanyInventors: Sudhir Mehta, Richard R. Jones, William J. Caveny, Rickey L. Morgan, Dennis W. Gray, Jiten Chatterji
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Patent number: 5851282Abstract: A Portland cement clinker free of C.sub.4 A.sub.3 S having the following proportions of clinker phases, in % by wt.:--C.sub.3 S: 40 to 80--C.sub.4 AF: <20--C.sub.2 S: <30--C.sub.3 A: <20and a SO.sub.3 content from 1.0 to 3.0% by wt., based on the clinker, obtained by burning a mixture of raw materials containing CaO, SiO.sub.2, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3 and an additive containing SO.sub.3 at temperatures from 1200.degree. to 1350.degree. C. centigrade, the use thereof and a Portland cement.Type: GrantFiled: July 18, 1997Date of Patent: December 22, 1998Inventor: Ivan Odler
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Patent number: 5843222Abstract: A cementitious composition comprising 0.1 to about 7.5 percent by weight of a solid residual oxidation product from the combustion of an aqueous emulsion of a naturally occurring asphalt from the Orinoco Belt of Venezuela which contains from about 100 to about 1500 ppm by weight of magnesium in the form of a water soluble magnesium salt, which product from the combustion contains magnesium sulfate present in the amount of from about 0.05 to about 4 percent by weight of the cementitious composition and from about 92.5 to about 99.95 percent by weight of a hydraulic silicate cement material.Type: GrantFiled: September 26, 1997Date of Patent: December 1, 1998Assignee: Air Products and Chemicals, Inc.Inventors: F. MacGregor Miller, Timothy Jay Roth, William Russell Welliver
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Patent number: 5749418Abstract: A cementitious composition is provided comprising a hydraulic cementitious material, iron chloride and sufficient water to form a pumpable slurry. The iron chloride predictably enhances the rheology and performance of the composition. Methods of cementing subterranean wells are accomplished by mixing together the hydraulic cementitious material, iron chloride and sufficient water to form a pumpable slurry; pumping the slurry to a selected location within the wellbore; and then allowing the slurry to solidify within the well.Type: GrantFiled: April 14, 1997Date of Patent: May 12, 1998Assignees: Halliburton Energy Services, Inc., Atlantic Richfield CompanyInventors: Sudhir Mehta, William J. Caveny
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Patent number: 5660625Abstract: Improved set accelerating mixtures and their use are disclosed to shorten the period after mixing hydraulically setting building materials, for example cement, up to the transition into the solid phase. The improved set accelerating mixtures comprise basic aluminum sulphates of the formula: Al(OH).sub.a (SO.sub.4).sub.b, in which the subscripts satisfy the conditions:a=3-2b and b=0.05 to 0.4.These basic aluminum sulphates are produced by parallel precipitation from solutions containing aluminum at temperatures usually less than 60.degree. C. by mixing dilute acid solutions and alkaline solutions containing sulphates in the pH range from 5.0 to 8.0 to produce an amorphous, basic aluminum sulphate.Type: GrantFiled: January 24, 1996Date of Patent: August 26, 1997Assignee: Giulini Chemie GmbHInventors: Otto Helmboldt, Istvan Potencsik, Johannes Breker, Reinhold Sedelies, Detlev Roggenkamp