| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 106803000 | Soil, diatomaceous earth, clay, slate or shale containing, or material for treating soil or earth (e.g., soil stabilization, etc.) | 6 |
| 20110088599 | SLUMP RETAINING ADMIXTURE FOR MODIFYING CLAY ACTIVITY IN CONCRETE - The present invention relates to the use of polycationic compound in combination with a hydroxycarboxylic acid or salt thereof to enhance slump retention in cements and concretes having clay-bearing aggregates, wherein the clay otherwise absorbs or diminishes the dosage efficiency of polycarboxylate superplasticizers. | 04-21-2011 |
| 20110297049 | POWDER TO REDUCE SHRINKAGE OF MINERALLY BINDING MATERIALS - This invention relates to a powder comprising a carrier material which is in powdery form and selected from the group consisting of a water-soluble polymer, a water-insoluble polymer, and an inert inorganic material, and a mixture containing at least about 5 wt. % of a compound having the formula (1-a) and at least about 5 wt. % of a compound having the formula (1-b), HO—(R | 12-08-2011 |
| 20120210911 | STABLE ORGANIC-BASED FLUID LOSS ADDITIVE CONTAINING AN ORGANOPHILIC CLAY-BASED SUSPENDING AGENT FOR USE IN A WELL - A well treatment composition comprises: a water-soluble, organic liquid, wherein the organic liquid: (A) comprises the continuous phase of the well treatment composition; and (B) comprises a polyglycol or a derivative of polyglycol; a fluid loss additive, wherein the fluid loss additive: (A) is insoluble in the organic liquid; and (B) comprises a high molecular weight, water-swellable polymer; and a suspending agent, wherein the suspending agent comprises an organophilic clay, wherein the well treatment composition has an activity of at least 15%. A method of cementing in a subterranean formation comprises: introducing a cement composition into the subterranean formation, the cement composition comprising: (i) cement; (ii) water; and (iii) the well treatment composition; and allowing the cement composition to set after introduction into the subterranean formation. | 08-23-2012 |
| 20130000522 | CEMENTITIOUS MATERIAL PRODUCTION PROCESS, WITH THE USE OF OIL SHALES AND/OR RESIDUES OF ITS PROCESSING IN CEMENTATION FURNACE - This process allows the attainment of cementitious materials and activated artificial pozzolana, developed as from shale oils and/or residues of its processing, hereinafter simply called “shale oil”, mixed among them and/or with clays when placed in the rotation oven, in proportion that vary from 1% to 100% of the shale oils in the mixture. These shale oils or mixtures of shale oil with clays, when burn in temperatures between 600° C. and 900° C., in a horizontal oven, in reducing conditions, generate the so called cementitious materials or activated artificial pozzolana, when in contact with the water, providing to the material agglomerating properties. | 01-03-2013 |
| 20130074740 | AGENTS FOR INERTING CLAYS IN HYDRAULIC COMPOSITIONS - A method for inerting clays in a hydraulic composition includes one step of putting a hydraulic composition or a constituent of a hydraulic composition in contact with a compound of the following formula (I): | 03-28-2013 |
| 20130263761 | Clay-Bearing Manufactured Sands for Hydratable Cementitious Compositions - The present invention provides a method for making sand compositions wherein manufactured sand particles are pretreated with a clay-mitigating polycation and blended with natural sand particles that have washed to remove fines such that at least 90% of the natural sand particles are retained on a 75 micron sieve. Methods of the invention also involve the use of the blended pretreated sand for making concrete wherein the sand is combined with cement, a polycarboxylate type dispersant, a further amount of clay-mitigating polycation compound, and at least one hydryoxyl or hydroxyl carboxylic acid or salt compound. | 10-10-2013 |
