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| Number | Title | Issue Date |
| 7288147 | Providing freezing and thawing resistance to cementitious compositions An improved freeze-thaw durability wet cast cementitious composition is provided that uses in-situ production of gas by gas generating additives and optionally polymeric microspheres that are blended directly into the mixture. The gas generating additives and the po... | 10/30/2007 |
| 7267720 | Method for preparing a building material A method of preparing a building material is provided. An aggregate material, water, a hydraulic binder material, and one or more hydraulic activators are mixed. The hydraulic binder material comprises slag material. The mixture is allowed to harden. A building mate... | 09/11/2007 |
| 7199083 | Self-generating foamed drilling fluids Self-generating foamed fluids for circulation through a well during drilling operations and methods for circulating such self-generating foamed drilling fluids are provided for. The drilling fluid comprises an aqueous solvent, a polymer, a surfactant, a first foam g... | 04/03/2007 |
| 6992048 | Methods of generating gas in well treating fluids The present invention relates to methods of generating gas in and foaming well treating fluids during pumping of the treating fluids or after the treating fluids are placed in a subterranean zone, or both. A method of the present invention provides a method of makin... | 01/31/2006 |
| 6858566 | Methods of generating gas in and foaming well cement compositions The present invention relates to methods of generating gas in and forming cement compositions that may be introduced into a subterranean zone. A method of the present invention provides a method of generating gas in a cement composition that comprises providing the ... | 02/22/2005 |
| 6722434 | Methods of generating gas in well treating fluids Improved methods of generating gas in and foaming well treating fluids introduced into a subterranean zone are provided. A method of the invention includes the steps of combining one or more gas generating chemicals with the well treating fluid and combining one or ... | 04/20/2004 |
| 5728209 | Unitized cement admixture An additive for concrete, mortar or grout comprises at least one admixture material in a compacted unit of selected amount, the unit having strength sufficient to maintain structural integrity during handling and storage, but having sufficient solubility ... | 03/17/1998 |
| 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 |
| 5605570 | Alkali-activated glassy silicate foamed concrete The invention pertains to a cementious composition of a strong, light, foamed silicate binder or concrete made from ground, calcium-rich glassy silicates that are the major component of blast-furnace slag. The other materials used to create the material a... | 02/25/1997 |
| 4659385 | Building material manufacturing from fly ash Fly ash combined with a bonding agent, an air entrainer, water, and a foaming agent which forms gas as a result of a chemical reaction within the mixture; allowed to foam and harden, produces a material that is relatively strong and light, has good struct... | 04/21/1987 |
| 4450010 | Well cementing process and gasified cements useful therein A composition for a method of cementing subterranean formations. The cementing composition comprises hydraulic cement, a nitrogen gas generating material, an oxidizing agent, and a reaction rate control material. The concentration of the nitrogen gas gene... | 05/22/1984 |
| 4407676 | Fiber-reinforced cement and process A lightweight hydraulic cement mortar comprising uniformly dispersed reinforcing fibrillated plastic filaments having microfibrillated structure and elements manufactured therefrom having improved mechanical isotropic properties, such as enhanced performa... | 10/04/1983 |
| 4333764 | Nitrogen-gas-stabilized cement and a process for making and using it A hydraulic cement slurry which forms a gas-locked cement which contains microsized clefts that are filled with nitrogen gas and is both impermeable and non-shrinking is formed by dissolving in the slurry mix water a correlated amount of gas-forming react... | 06/08/1982 |
| 4204875 | Cementitious compositions A method for preventing shrinkage of alkaline aqueous hydraulic cementitious mixtures during setting and hardening which comprises incorporating in the mixtures a monopersulfate salt, or a monopersulfate salt together with at least one peroxygen compound ... | 05/27/1980 |
| 4142909 | Method and composition for controlling contraction in setting cementitious systems through the addition of gas generating agents The contraction of aqueous hydraulic cement mixtures is controlled by the addition thereto of a gas generating agent capable of generating gas in the mixture without the addition of activators or other agents. Gas generation may be controlled over an exte... | 03/06/1979 |
| 4043825 | Production of foamed gypsum moldings In the production of a gypsum-based porous body of high strength by foaming a gypsum-water mixture containing alkali, hydrogen peroxide and a decomposition catalyst therefor, the improvement which comprises including in said mixture an acid-reacting compo... | 08/23/1977 |
| 4040850 | Production of porous gypsum moldings In the production of a gypsum-based porous body of high strength by foaming a gypsum-water mixture, the improvement which comprises including in said mixture about 0.1 to 1 part of a water-soluble aluminum compound per 100 parts by weight of gypsum, calci... | 08/09/1977 |
