32results about How to "Increase plastic viscosity" patented technology

An invert emulsion drilling fluid, and a method of drilling with such fluid, having improved rheology at low mud weights and high temperatures. The improved rheology is effected with addition of a rheology additive of the invention comprising fatty dimer diamines or dimer diamines and an organic acid or ester of the acid. A nonlimiting example of such a rheology additive comprises a C36 fatty dimer diamine and adipic acid or dimethyl adipate.

The invention belongs to the technical field of building materials, and in particular relates to a colorant suitable for 3D printing white cement-based materials and its use method and application. In parts by weight, the colorant is compounded from the following components: 1-5 parts of coupling agent, 5-30 parts of polymer emulsion, 5-30 parts of resin, 10-40 parts of mineral admixture, pigment 5-25 parts, 5-30 parts coagulant, 2-9 parts water reducer, 0.05-1.10 parts defoamer, 95-120 parts water. The coloring agent proposed by the present invention has good colorability, weather resistance, pan-alkali resistance, plastic viscosity, yield stress, fast and stable setting time, and the printed object has a low deformation rate, etc., which can well meet the requirements of 3D printing needs of white cement-based materials.

The invention belongs to the technical field of building materials, and in particular relates to a 3D printing white cement-based material, which comprises, in parts by weight: 640-740 parts of basic oxide, 400-470 parts of phosphate, 60-120 parts of retarder and A modifier, the modifier includes a solid component and a liquid component, and the liquid component is stored separately from the solid component in the basic oxide, phosphate, retarder and modifier, wherein: The liquid component includes: 10-30 parts of emulsion; the solid component includes: 10-25 parts of fiber, 5-25 parts of gypsum, 5-17 parts of titanium dioxide, and 10-30 parts of limestone powder. The present invention uses phosphate and alkaline oxide as the main components, and by adding components such as fibers and modifiers, the rheology and thixotropy of the 3D printing white cement-based material are greatly improved, and the printable time is realized. Stable regulation and stable control of 3D printed structures.

The invention discloses a preparation method of a thickener used for self-compact concrete. The method comprises the following steps: 1, weighing 2-acrylamide-2-methylpropanesulfonic acid and acrylic acid in proportion, processing to prepare an aqueous solution, and adjusting the pH value to 6.5-7.0; 2, adding a prepared monomer acrylamide solution with the concentration of 25-35% while stirring, uniformly stirring, dumping the obtained mixed solution into a flask, carrying out constant temperature water bath, and introducing nitrogen for protection; and 3, adding an initiator in a dropwise manner when the reaction temperature rises to 30-40DEG C, carrying out heat insulation at 40DEG C, carrying out a stirring reaction for about 1.5-2h, stopping the introduction of nitrogen when reactants are a viscous liquid, and carrying out constant temperature slaking for a period of time to obtain a white transparent colloid which is the thickener. The thickener obtained in the invention is used for preparing the self-compact concrete, has a good water solubility and a good thickening effect, can effectively improve the plastic viscosity of the self-compact concrete, and solves the water segregation and separation problems of the self-compact concrete.

The present invention relates to oil well drilling comprising a weighting agent consisting of microfine, particulate ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2 / g, where 90% by volume of the particles have a size of less than 12.5 μm and a D50 between 3 μm and 6 μm by volume measured by laser diffraction using Malvern laser diffraction particle size analyzer, where the particles have an average circularity of at least 0.85 determined by image analysis. The invention further relates to high density oil well cement slurry comprising water, Portland cement, a to weighting material and optionally silica flour, microsilica, fiber, rubbery particles a fluid loss addition and a retarder, where the weighting material is particulate microfine ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between 1 and 5 m2 / g, and where 90% by volume of the particles have a size of less than 12.5 μm and a D50 between 3 and 6 μm measured by laser diffraction using Malvern laser diffraction particle size analyzer, and where the particles have an average circularity of at least 0.85 determined by image analysis. Finally, the invention relates to a slurry of microfine ilmenite.

The invention discloses an isocyanate chain extension modified polycarboxylic acid water reducing agent and a preparation method thereof, and belongs to the field of cement additives. A chain extender is mixed together with a chain transfer agent and a reducing agent to serve as an initiator, and isocyanate and acrylic acid serve as a small monomer solution to assist the initiator which is synchronously added in drops by a gradual drop adding manner to be reacted with a macromonomer at the bottom of a reaction vessel. According to the invention, chain extenders of alcohol and amine compounds of low molecular weight polyfunctional groups containing hydroxyl groups or amino groups by introducing isocyanate to polycarboxylic acid molecular main chains are synthesized, and polymerized at the end group of isocyanate to increase the number of short branched chains, so that polyether long branched chains and the short branched chains of the chain extenders of the alcohol and amine compounds are promoted to be distributed alternately to increase dispersion and adaptability of the water reducing agent. The modified polycarboxylic acid water reducing agent obviously improves the dispersion property of cement, and then slightly increases slump loss resistant property, compressive strength and impermeability.

The invention relates to the field of building construction, and provides a mud for retaining wall of an underground diaphragm wall of a deep and large foundation pit in a round boulder formation, which comprises the following raw materials in parts by weight: 1000 parts of water, 75-85 parts of bentonite, 3-5 parts of soda ash, and polyacrylic acid Sodium 0.5‑1.5 parts. The invention also provides a method for configuring the slurry for the retaining wall of the underground diaphragm wall of the deep and large foundation pit in the round gravel formation. The advantage of the present invention is that: the present invention adopts sodium polyacrylate to replace traditional CMC, and its slurry retaining wall performance and slurry recycling rate will be greatly improved, and at the same time, corresponding environmental pollution and material consumption are reduced; at the same time, it is prepared according to the formula of the present invention The various indexes of the obtained mud can meet the requirements of the circulating mud index, the effect of wall protection is good, and the stability of the groove wall is good.

The invention provides an organic-inorganic compound oil displacement agent, an organic-inorganic compound oil displacement system as well as a preparation method and application and relates to the technical field of oil displacement agents. The organic-inorganic compound oil displacement agent comprises the following raw materials in parts by mass: 5-20 parts of electronegative inorganic nano-particles and 20-100 parts of electropositive amphiphilic polymers. The technical problem that the conventional polyacrylamide has a limited application range in high-temperature high-salt reservoir development is solved. After the organic-inorganic compound oil displacement agent provided by the invention is mixed with injected oil field water to prepare the oil displacement system, by virtue of charge attraction of the electronegative inorganic nano-particles and the electropositive amphiphilic polymers, the plastic viscosity of the oil displacement system is obviously improved, and the environmental sensitivity of the oil displacement system is reduced, so that the organic-inorganic compound oil displacement agent has wide application prospects in the high-temperature high-salt reservoir development.

The invention discloses a preparation method of garbage incineration power generation furnace slag concrete. According to the method, during a concrete preparation process, acrylic resin is added in two batches, magnetized water is added in three batches, and stirring is carried out four times. A construction material is prepared with garbage furnace slag, such that a resource is effectively recovered and utilized. The method is simple; preparation efficiency is high; and the production process is environment friendly. Through adjusting the ratio, concrete products with different strength grades can be obtained. The finally obtained concrete has the advantages of sufficient and fine mixing, good compressive strength, good water resistance, high stability, and good comprehensive performance.

The invention discloses a self-compacting anti-freezing and anti-thawing concrete and a preparation method thereof. The self-compacting anti-freezing and anti-thawing concrete is composed of, by weight part, 290-360 parts of cement, 15.5-25.5 parts of additives, 130-180 parts of mineral admixture, 250-320 parts of fine aggregate, 500-700 parts of coarse aggregate, 80-120 parts of coal ash, 180-240parts of water, 8.6-12.8 parts of water reducer, 10-15 parts of adhesives and 10-20 parts of lignin fiber, wherein the additives are composed of anti-freezing agent, air entraining agent and swellingagent at a weight ratio of 1:2-3:0.7-1. The preparation method of the self-compacting anti-freezing and anti-thawing concrete comprises preparing a first mixture, preparing a second mixture and preparing a finished product. The self-compacting anti-freezing and anti-thawing concrete has the advantages of being good in peaceability, less prone to bleeding and segregation and high in anti-freezingand anti-thawing performance.