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| Number | Title | Issue Date |
| 7368010 | Calcium aluminate clinker as a refractory aggregate with and without barium addition and use thereof The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12,... | 05/06/2008 |
| 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 |
| 7169225 | Anhydrite cement compositions and procedures for manufacture The present invention describes improved anhydrite cementitious compositions that control or avoid ettringite formation, as well as procedures for manufacture. These compositions exhibit good compression resistance in early stages, good resistance to abrasion and go... | 01/30/2007 |
| 7101429 | Method of resisting corrosion in metal reinforcing elements contained in concrete and related compounds and structures The present invention provides methods for resisting corrosion of metal elements in concrete, and associated compounds and structures. Acid mine drainage sludge is used as a source of a precursor compound that reacts with a source of anion to form a chloride-sequest... | 09/05/2006 |
| 7081156 | Method of resisting corrosion in metal reinforcing elements contained in concrete and related compounds and structures A method of resisting corrosion of metal elements in concrete is provided. It includes introducing into concrete containing metal elements, at least one combination compound capable of sequestering chloride ions having the formula 3Me(II)O.(R,R′)2O... | 07/25/2006 |
| 7074263 | Direct sequestration of chloride ions The present invention provides methods and compounds for the direct sequestration of chloride ions without requiring the addition of a source of anion such as nitrite or nitrate. A direct sequestration additive is introduced to fresh concrete or hardened concrete wh... | 07/11/2006 |
| 7001454 | Clinker and white portland cement with a high sulfur content derived from a high sulfur content pet-coke used as fuel The present invention relates to a family of white clinker compositions with a high capacity to fix sulfur derived from a high sulfur content pet-coke used as fuel in the manufacture thereof, which further exhibits low fuel composition and fast setting, achieved by ... | 02/21/2006 |
| 6997984 | Cement admixture A burned product containing 100 parts by weight of C2S, 10 to 100 parts by weight of C2AS, and 20 parts by weight or less of C3A; a cement admixture prepared by grinding the burned product; and a cement containing 100 parts by weight... | 02/14/2006 |
| 6709508 | Dry mortar formulations modified with water-redispersible polymer powders Dry mortar formulations comprising a) from 0.5 to 80% by weight of hydraulic binder, b) from 0 to 97% by weight of fillers, c) from 0 to 3.5% by weight of thickeners, d) from 1.0 to 80% by weight of redispersible polymer powder, and | 03/23/2004 |
| 6656264 | Settable composition containing potassium chloride 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 chloride (KCl) as a substantial replacement for Portland cement conventionally used in such... | 12/02/2003 |
| 6641659 | Additive for stabilizing and petrifying rocks 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, ... | 11/04/2003 |
| 6395083 | Method for producing a cement admixture, concrete and fluorine-containing oxyalkylene compounds The present invention is the following invention which provides a cement admixture which satisfies fluidity of fresh concrete and high strength of the hardened product of concrete simultaneously. Namely, the present invention resides in a cement admixture whic... | 05/28/2002 |
| 6022408 | Cement and concrete compositions for controlling alkali-silica reaction in concrete Processes for making cement which when used to make concrete can stabilize the concrete against alkali-silica reactivity (ASR) from alkali containing components. The process includes adding lithium containing materials in the front of a cement kiln along ... | 02/08/2000 |
| 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 |
| 5891239 | Quick-setting cement containing clinker based on calcium fluoro-aluminate mixed with lime The present invention regards a particularly quick-setting Portland cement clinker containing calcium fluoro-aluminate (11CaO.7Al2 O3.CaF.sub.2) mixed with lime that has not undergone the burning process of the clinker.... | 04/06/1999 |
| 5755876 | Cement compositions for controlling alkali-silica reactions in concrete and processes for making same Processes for making cement which when used to make concrete can stabilize the concrete against alkali-silica reactivity (ASR) from alkali containing components. The process includes adding lithium containing materials in the front of a cement kiln along ... | 05/26/1998 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 5660620 | Waterproofing composition The present invention refers to a waterproofing composition to be applied on any surface desired to be protected or on damaged surfaces in order to avoid moisture or water leakages to the inside of the rooms. The composition comprises or consists essentia... | 08/26/1997 |
| 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 |
| 5639298 | Modified gypsum compositions A set control composition and/or interground blend of materials including a calcium sulfate material and magnesium sulfate.... | 06/17/1997 |
| 5624490 | Process for treating metal chlorides A process for preparing high strength, rock-like, water-resistant aggregates by high intensity mixing of acidic metal chlorides and alkaline/cementitious materials in the presence of a low water ratio wherein the metal chlorides are simultaneously neutral... | 04/29/1997 |
| 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 |
| 5554218 | Cement compositions and methods of underwater application This invention relates generally to the field of cement, especially cement for underwater application. The invention provides a composition for preparing cement that solidifies underwater comprising exothermic micro particles and base cement. Exothermic m... | 09/10/1996 |
| 5356472 | Portland cement clinker and portland cement The present invention pertains to a portland cement clinker containing the following amounts of clinker phases, in wt. %: C3 S: 30 to 80, C4 A3 S: 5 to 30, C4 AF: | 10/18/1994 |
| 5242603 | Process for the disposal of waste A process for treating waste by mixing the waste with a chemical reagent and a pozzolanic material. The chemical reagent includes a retarder that is a viscosity-altering reagent, and an accelerator.... | 09/07/1993 |
| 5232497 | Clay control additive for cement compositions and method of cementing A clay control additive for cement composition of the general formula: ##STR1## wherein the R groups are selected from a C1 to C4 substituted alkyl.... | 08/03/1993 |
| 5177305 | Waste incineration process The process is the type wherein the solid portions of waste materials of all origins are crushed and ground to a granulometry of under 5 mm and then are heated to between 750° C. and 1,350° C. According to the invention, after the addition, if applicabl... | 01/05/1993 |
| 5173117 | Additives for roller compacted concrete pavement An additive for roller compacted concrete pavement which controls the heat of hydration, prevents the reduction of packing of the pavement and prevents thermal cracking of the dried end product. The additive is a hydrolyzable tannin compound used alone or... | 12/22/1992 |
| 5151203 | Composition and method for cementing a well A composition for and method of performing primary cementing operations is disclosed. The method comprises the use of a water slurry of a thixotropic cementing composition which rapidly develops sufficient static gel strength to reduce if not eliminate an... | 09/29/1992 |
| 5076850 | Process for treating metal chlorides Process for making aggregate suitable for use as a road base material comprising: (a) mixing metal chlorides with alkaline substance selected from the group consisting essentially of at least one cementitious material and optionally about 0.1-50%, based o... | 12/31/1991 |
| 5032181 | Carbon fiber reinforced cement concrete composites improved by using chemical agents Portland cement concrete-carbon fiber structure displays high tensile and flexural strengths, low electrical resistivity and high electromagnetic interference shielding effectiveness. The structure comprises cement concrete having a small predetermined pr... | 07/16/1991 |
