| CONSTRUCTION RESEARCH & TECHNOLOGY GMBH Patent applications |
| Patent application number | Title | Published |
|---|
| 20120085266 | Accelerator Mixture and Method of Use - The invention concerns an accelerator mixture which contains aluminium 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. | 04-12-2012 |
| 20110313177 | 2-Oxo-1, 3-dioxolane-4-carboxylic Acid and Derivatives Thereof, Their Preparation and Use - 2-Oxo-1,3-dioxolane-4-carboxylic acid and derivatives thereof, according to the following formula, | 12-22-2011 |
| 20110308193 | Packaged Roll Construction Material - A packaged construction material includes a housing, a roll of construction material such as a roll of building wall sheathing fabric located within the housing and a hanging device engaged with the housing for hanging the packaged construction material on the belt or other article of clothing worn by a construction worker or on a scaffolding or other support structure. A kit including the packaged rolled construction material and a sufficient amount of fluid membrane to be used on combination with the rolled construction material to impart a secondary weather barrier to a building wall substrate is also provided. | 12-22-2011 |
| 20110301275 | Copolymer Containing Acid Building Blocks and Various Types of Polyether Building Blocks - The invention relates to a copolymer comprising
| 12-08-2011 |
| 20110217119 | Zone Equidistance Control Expansion Joint System - A modular-type expansion joint system for bridging a gap that is located between spaced-apart structural members. The expansion joint system may be utilized, for example, in bridges, highways, and tunnel constructions where gaps are formed between spaced-apart, adjacent concrete sections. The expansion joint system includes vehicular load bearing members and support members. Seals are located between the vehicular load bearing members. The expansion joint system includes zones of differing movement capabilities in response to displacement events. | 09-08-2011 |
| 20110197528 | Exterior Finish System - Disclosed is an exterior finish system for building structures that includes a water pervious adhesive for securing an insulation layer to a water resistive barrier applied to a building wall substrate. Also disclosed is a building structure such as a building column or wall that includes the finish system and a method of using the finish system to assemble a building structure such as column or wall. | 08-18-2011 |
| 20110139037 | Powdery Building Compound - A delayed action powdery building compound is provided, consisting of a reactive support material and a liquid polymer component applied to the support material. The inventive compound can contain the support material in the form of hydraulic (latent) binder, inorganic additives and/or organic components, and the polymer component for example in the form of polyvinyl alcohols, polyvinyl acetates and MPS-based polymers. The component makes it possible to obtain the delayed liberation of the support material in an aqueous building chemical mixture as a result of a time-depending separation of the polymer component from said support material. The powdery building compound also makes it possible to carry out a time-controlled hardening of hydratable building material mixtures and to obtain a time-controlled internal drying of aqueous dispersion-based materials. | 06-16-2011 |
| 20110135387 | EXPANSION JOINT SEALING SYSTEM - An expansion joint sealing system may be used to provide a continuous and seamless waterproof membrane across a gap in an expansion joint. The expansion joint sealing system includes sealing members that are provided with a keyway for accepting and interlocking a coating membrane. Also disclosed are an expansion joint including spaced apart structural members and the sealing system and a method for sealing a gap between two spaced apart structural members. | 06-09-2011 |
| 20110034572 | VOLUME TILE ADHESIVE - The use of a mixture consisting of a) alkaline hydraulic binder, b) cellulose ether, c) blowing agent, d) filler as a tile adhesive is claimed, wherein the blowing agent c) comprises peroxo compounds and/or percarbonates and/or aluminum powder and wherein the tile adhesive mixture has a maximum and stable volume increase of 50% by volume within five minutes after admixing of water. This mixture, which may also comprise further additives such as, for example, retardants, antifoams and polymer dispersion powders, in addition to said four components, has the advantage that the blowing agent used reacts virtually completely within 5 min and thus leads to a volume increase of the tile adhesive mixture of not more than 50% by volume. After it has hardened, the mixture has a high intrinsic strength but also sufficient bonding strength and adhesive strengths with respect to the tile/substrate system. | 02-10-2011 |
| 20110033625 | USE OF FLEXIBLE SEALING SLURRIES FOR THE AFTERTREATMENT OF FRESH CONCRETE SLABS - The use of a slurry-type seal coating which is flexible after hardening, containing, as component a), a system having a proportion of hydraulic binder and, as component b), an elastifying plastic, for aftertreatment, over the whole area, of a concrete body having a residual moisture content >2 CM % is claimed. The claimed slurry-type seal coatings which contain, as component a), preferably a cement mortar and, as component b), a homo-, co- or terpolymer in the preferred form of a liquid polymer dispersion result in a higher strength and less shrinkage of the concrete body surface treated with them. The concrete bodies treated therewith are protected against seepage water, pressurised water and water splashes, in particular in areas exposed to wetness. | 02-10-2011 |
| 20100324173 | AQUEOUS DISPERSIONS OF SILICA FOR INCREASING EARLY STRENGTH IN CEMENTITIOUS PREPARATIONS - Dispersion which is free of binders and which contains silica and at least one superplasticizer, the silica being a precipitated silica having a surface area greater than 50 m | 12-23-2010 |
| 20100119180 | PAPER VALVE SACK WITH INNER CATCH - A description is given of a paper valve bag with an inner panel which is located at the paper-bag end which is located opposite the paper-bag end with valve, and, on its surface which is directed toward the sack interior, the inner panel has an opening aid which has a higher modulus of elasticity than the inner panel. The opening aid, which may be a tear-open strip or a tear-open thread, projects beyond the inner panel at at least one surface-area end of the latter. Such paper valve bags are used for fine-grain, pulverulent and/or free-flowing materials, in particular ready-to-use mortar. | 05-13-2010 |
| 20090292041 | AMINE CONTAINING STRENGTH IMPROVEMENT ADMIXTURE - A strength improvement admixture composition is provided that increases the compressive strength of cementitious compositions without negatively increasing the setting time. The admixture comprises the components of a polycarboxylate dispersant and strength improvement additive. | 11-26-2009 |
| 20090272296 | Process for the Preparation of Products of High Early Strength Comprising Hydraulic Binders - A process for the preparation of products of high early strength comprising hydraulic binders, in which a hydraulic binder, water and 0.1 to 5% by weight, based on the hydraulic binder, of a finely divided titanium dioxide are mixed with agitation and in any desired sequence. | 11-05-2009 |
| 20090239430 | Exterior Finishing System and Building Wall Containing a Corrosion-Resistant Enhanced Thickness Fabric and Method of Constructing Same - A corrosion-resistant lath is provided for use in exterior finishing systems, such as stucco systems and exterior insulation and finish systems (“EIFS”). The lath includes in a first embodiment an open, woven fabric comprising weft and warp yarns containing non-metallic fibers, such as glass fibers. A portion of the weft yarns are undulated, resulting in an increased thickness for the fabric. The fabric is coated with a polymeric resin for substantially binding the weft yarns in the undulated condition. This invention also includes methods for making an exterior finish system and building wall including an exterior finish system using such a lath. | 09-24-2009 |
| 20090197991 | RHEOLOGY MODIFYING ADDITIVE FOR DRY CAST CEMENTITIOUS COMPOSITIONS - A dry cast cementitious composition including cement, water, and a rheology modifying additive (RMA) is provided. The inclusion of the RMA improves the dry cast cementitious composition's response to vibration and dampens out differences due to minor fluctuations in initial slump of the composition. The RMA may include a dispersant for the dry cast cementitious compositions. The dry cast cementitious composition may optionally include other admixtures or additives known in the industry. Methods for making the dry cast cementitious composition and dry cast cementitious articles from the composition are also provided. | 08-06-2009 |
| 20090197990 | Lightweight Structural Finish - A lightweight finish composition, method of production and a method of application are provided. The lightweight finish composition comprises a resin dispersion, alkali metal phosphate, alkylolammonium salt of a polyfunctional polymer, and lightweight aggregate such as silica spheres. The lightweight aggregate has a density and weight that is less than those of sand. The combination of alkali metal phosphate and alkylolammonium salt of a polyfunctional polymer stabilizes the lightweight finish composition by preventing the lightweight aggregate from absorbing water, after production of the lightweight finish composition. | 08-06-2009 |
| 20090186964 | Polymer Composition and Use of the Same as an Additive in Aqueous Construction Systems and Water-Based Paint and Coating Systems - A polymeric composition consisting of water-soluble or water-swellable copolymers containing sulfo groups and nonionic polysaccharide derivatives, such as methylcellulose (MC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), methylhydroxyethylcellulose (MHEC), methylhydroxypropylcellulose (MHPC) and welan gum or diutan gum, and the use thereof as an additive in aqueous construction systems based on hydraulic binders, such as cement, lime, gypsum or anhydrite, is described. The composition can also be used in water-based paint and coating systems. The composition according to the invention exhibits a synergistic improvement of the properties and, when used in relatively small amounts, constitutes highly effective water retention agents in such construction and paint systems, which also achieve outstanding air pore stability and tack. | 07-23-2009 |
| 20090149574 | Iron Filled Urethane Cementitious Flooring Composition - Cementitious flooring compositions are products obtained by mixing together and allowing to cure hydraulic cement, water, iron aggregate filler, and resin forming components comprising polyisocyanate and an isocyanate reactive compound. The compositions are particularly suitable for flooring applications and the mixtures, once made up, set very rapidly. | 06-11-2009 |
| 20090124728 | Providing Freezing and Thawing Resistance to Cementitious Compositions - An improved freeze-thaw durability cementitious composition is provided that uses at least partially degradable polymeric particles that are blended directly into the cementitious composition mixture. The degradable polymeric particles provide void spaces in the cementitious material matrix, and such void spaces act to increase freeze-thaw durability of the cementitious material. | 05-14-2009 |
| 20090107364 | Hydraulic binding agent - The invention relates to a hydraulic binding agent comprising a binding agent component having free-flowing or solidifying properties when water is added and an acceleration component which is used to accelerate solidification. The acceleration component contains ultrafine calcium hydroxide having a high specific surface and low grain size. | 04-30-2009 |
| 20090054558 | Pulverulent Polycondensation Products - Pulverulent polycondensation products are described, consisting of
| 02-26-2009 |
| 20090036571 | Water-Soluble Copolymers Containing Sulpho Groups, Process for Their Preparation and Their Use - Water-soluble sulfo group containing copolymers use as stabilizers, rheology modifiers and water retention agents in aqueous building materials based on hydraulic binders, such as cement, lime, gypsum and anhydrite, and in water-based painting and coating systems are described. Processes of preparing the copolymers and methods of using them are also described. | 02-05-2009 |
| 20080319217 | Carbonic Acid Derivatives, Method for the Manufacture Thereof and the Use Thereof - The invention relates to carboxylic acid derivatives which are obtained by reacting an unsaturated dicarboxylic acid anhydride (A) with a hydrophobic reactive component (B) that contains at least one group reacting to carboxylic acid anhydrides and has an average molecular weight of 200 to 50,000 Dalton. The inventive carboxylic acid derivatives are excellent as a substance for preventing efflorescences on surfaces of hardened cementitious construction materials and/or hydrophobizing the corresponding cementitious systems. Furthermore, said cementitious products absorb considerably smaller amounts of water as a result of the inventive additives such that frost damage and premature rusting of the reinforcing steel can be significantly reduced. | 12-25-2008 |
