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| Number | Title | Issue Date |
| 8137456 | Process for the preparation of sulphur cement or a sulphur cement-aggregate composite The present invention provides a process for the preparation of sulphur cement or a sulphur cement-aggregate composite comprising the following steps: (a) admixing at least an inorganic filler and/or aggregate and a polysulphide-containing organosilane having... | 03/20/2012 |
| 7699931 | Solidification and hardening accelerator for hydraulic binding agents and method for the production thereof A setting and curing accelerator for hydraulic binders comprises: Al2(SO4)3 aluminum sulfate, Al(OH)3 aluminum hydroxide and mineral acid in aqueous solution. The setting and curing accelerator preferably comprises:... | 04/20/2010 |
| 7316744 | Composition which is intended for use as an additive for cement The present invention relates to an additive which is added in order to reinforce cement. The additive comprises chlorides of alkali metals, alkaline earth metals and/or transition metals and oxides selected from the group consisting of alkali metal and alkaline ear... | 01/08/2008 |
| 7296626 | Liquid additive for reducing water-soluble chromate 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. ... | 11/20/2007 |
| 7186353 | Alkaline earth or alkali metal salts for antifreeze, deicing, and freeze control Antifreeze, deicing, and freeze control systems comprising aqueous alkaline earth or alkali metal salts of calcium, sodium and magnesium nitrate used separately or in mixtures with other substances currently used for these applications such as sodium chloride, magne... | 03/06/2007 |
| 7174962 | Methods of using lightweight settable compositions comprising cement kiln dust Settable compositions that comprise water, CKD, and microspheres, wherein the lightweight settable composition has a density less than about 13 pounds per gallon. Methods of cementing that comprise providing a lightweight settable composition having a density less t... | 02/13/2007 |
| 7037369 | Accelerator composition An alkali-free accelerator for use with spray-applied cementitious compositions such as concrete and mortar is the reaction product in aqueous medium of amorphous aluminium hydroxide, aluminium sulphate, formic acid and phosphoric acid. These accelerators perform as... | 05/02/2006 |
| 6964712 | Hardening protection compositions for partial carburization of metallic components Hardening protection compositions based on substances which form boron glass for partial carburization of metallic components, which contain magnesium-silicon compounds as an additive. These hardening protection compositions can be used very advantageously in proces... | 11/15/2005 |
| 6800129 | High solids pumpable cement additives Exemplary liquid cement additive compositions have high solids loading which includes alkali or alkaline earth metal salts and other cement additive components. The liquid carrier is preferably aqueous in nature, although non-aqueous carriers are possible, and the c... | 10/05/2004 |
| 6740156 | Carrier substance for a hydraulic binder 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. ... | 05/25/2004 |
| 6616753 | Methods and compositions for sealing subterranean zones 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 fo... | 09/09/2003 |
| 6264740 | Inorganic cementitious material A method of producing a new type of cement, hereafter called Conch-krete. Conch-krete is created by adding sodium carbonate (also known as soda ash, natron, etc.) and one or more minerals from the calcium carbonate group (including aragonite, limestone, c... | 07/24/2001 |
| 5972103 | Universal well cement additives and methods 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 organ... | 10/26/1999 |
| 5968255 | Universal well cement additives and methods 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... | 10/19/1999 |
| 5911819 | Cement spraying admixture A method for coating a substrate with a cementitious composition by spraying, comprising the addition to the initial cementitious mix one of a ଲ-naphthalene sulphonate-formaldehyde condensate and a water-soluble poly(alkylene oxide) of molecular wei... | 06/15/1999 |
| 5850880 | Composition and method to control cement slurry loss and viscosity Powdered and liquid fluid loss additives are disclosed for use in cementing wellbores, particularly oil and gas wellbores. Excellent fluid loss control is achieved over a wide range of conditions using various cements systems. The invention utilizes polyv... | 12/22/1998 |
| 5843222 | Modified cement and concrete compositions 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 ... | 12/01/1998 |
| 5769938 | Waste-treating agent To treat waste containing harmful netals such as lead, cadmium, mercury, chromium, copper, nickel, zinc, etc., the waste is mixed with a treating agent containing, as the essential constituent component, solid acid(s) and/or cement and additionally a caki... | 06/23/1998 |
| 5753034 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of a hexafluorosilicate salt, and free of or having only small amount... | 05/19/1998 |
| 5753033 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of a boron tetrafluoride salt, free of or having only small amounts o... | 05/19/1998 |
| 5753035 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an inorganic acid, and from about 0.1 to about 4% by weight of a t... | 05/19/1998 |
| 5753031 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an inorganic acid, and from about 0.1 to about 4% by weight of a h... | 05/19/1998 |
| 5753032 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of phosphoric acid, and from about 0.1 to about 4% by weight of a sou... | 05/19/1998 |
| 5749418 | Cementitious compositions and methods for use in subterranean wells 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... | 05/12/1998 |
| 5741358 | Corrosion inhibiting composition for treating asbestos containing materials A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, optionally a source of fluoride ions, and a cor... | 04/21/1998 |
| 5728208 | Concrete mix, process for preparing same, an additive for concrete mix, and process for preparing same A new concrete mix sodium nitrate, sodium carbonate, sodium sulfate, calcium chloride, calcium carbide, lime, cement, coarse aggregate and sand in a percent ratio of (0.51-0.70):(0.56-0.58):(0.66-0.90):(0.05-0.10):(0.17-0.40):(0.05-0.01):(2 5-30):(29.... | 03/17/1998 |
| 5728210 | Composition and method to control cement slurry loss and viscosity Powdered and liquid fluid loss additives are disclosed for use in cementing wellbores, particularly oil and gas wellbores. Excellent fluid loss control is achieved over a wide range of conditions using various cements systems. The invention utilizes polyv... | 03/17/1998 |
| 5728428 | Composition for protecting a body of concrete, a process for preparing same, and a method for the protection of a body of concrete A new composition for the protection of a body of concrete sodium nitrate, sodium carbonate, sodium sulfate, calcium chloride, calcium carbide, lime, cement, and sand in a percent ratio of (0.9-1.8):(2-3):(2.5-3.6):(0.05-0.15):(0.75-1.15):(0-8-1):(36-40):... | 03/17/1998 |
| 5725652 | Lightweight, low water content expanded shale, clay and slate cementitious compositions and methods of their production and use An improved lightweight cementitious product made up of an aqueous cementious mixture using cement and expanded shale, clay and slate mix, that can incorporate fly ash, lime, and the weight saving component, which is micronized polystyrene particles havin... | 03/10/1998 |
| 5678234 | Process for the encapsulation and stabilization of radioactive, hazardous and mixed wastes The present invention provides a method for encapsulating and stabilizing radioactive, hazardous and mixed wastes in a modified sulfur cement composition. The waste may be incinerator fly ash or bottom ash including radioactive contaminants, toxic metal s... | 10/14/1997 |
| 5658380 | Composition for controlling the set time of cement An oil and gas well cementing composition and method are shown utilizing hydraulic cement, water a cement hydration retarder and an additive which is effective over a selected time period degrade the retarder. The additive is a controlled release oxidizer... | 08/19/1997 |
| 5595596 | Cement composition and its use for the preparation of lightweight concretes 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 nor... | 01/21/1997 |
| 5584926 | Cement compostion A cement composition consists essentially of (a) from 50% to 97% by weight (calculated on the total composition) of a Portland cement clinker, the sulfur content of which is from 0.5% to 10% by weight expressed as SO3 and the fluorine content o... | 12/17/1996 |
| 5580378 | Lightweight cementitious compositions and methods of their production and use An improved lightweight cementitious product made up of an aqueous cementitious mixture that can incorporate fly ash, portland cement, sand, lime, and the weight saving component, which is micronized polystyrene particles having particle sizes in the rang... | 12/03/1996 |
| 5503672 | High temperature retarders for oil field cements, cement slurries and corresponding cementing processes The invention relates to the cementing of high temperature wells. The retarder consists of a methylene phosphonic acid derivative and of a boric acid or a borate at least as acid as borax in an aqueous solution, in particular, Na pentaborate, in a preferr... | 04/02/1996 |
| 5490889 | Blended hydraulic cement for both general and special applications A blended hydraulic cement binder, is disclosed, consisting of water, fly ash, Type III portland cement, Type I portland cement, slag cement, ground silica, boric acid, borax, citric acid and an alkali metal activator. The cement binder and sequences for ... | 02/13/1996 |
| 5489334 | Process for producing a hydraulic cement binder for both general and special applications A process is disclosed for producing a hydraulic cement binder for both general and special applications, consisting of water, cementitious materials, boric acid, borax, citric acid, an alkali metal activator, and with or without ground silica. This cemen... | 02/06/1996 |
| 5457262 | Preparation of inorganic hardenable slurry and method for solidifying wastes with the same The present invention discloses a method for preparing the inorganic hardenable slurry and the use of same in the solidification of wastes. In addition to water, the essential parts of the slurry are inorganic components including borates, cement-base pow... | 10/10/1995 |
| 5387283 | Process for producing a hydraulic cement binder for both general and special applications A process is disclosed for producing a hydraulic cement binder for both general and special applications, consisting of water, cementitious materials, boric acid, borax, citric acid, an alkali metal activator, and with or without ground silica. This cemen... | 02/07/1995 |
| 5374308 | Blended hydraulic cement for both general and special applications A blended, hydraulic cement binder, is disclosed, consisting of water, fly ash, Type III portland cement, Type I portland cement, slag cement, ground silica, boric acid, borax, citric acid and an alkali metal activator. The cement binder and sequences for... | 12/20/1994 |
