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 discloses low cementitious material self-compacting concrete. Cement is a main raw material in a cementitious material of the self-compacting concrete; and if the cement consumption is high, overhigh concrete shrinkage is easily caused due to overhigh hydration heat of the cement, which is unfavorable for concrete crack control and concrete durability improvement, and problems such as disintegration, bleeding and the like easily occur. An additive XAMC is added into the concrete formula and can adsorb onto surfaces of particles to form a close adsorption layer so as to prevent the particles from flocculating and aggregating to realize the dispersion and stabilization function. Water-washing superfine sand which is rich in resources replaces partial mineral admixture, the low cementitious material self-compacting concrete can meet the basic requirement of high strength concrete by adding the XAMC under the condition of reducing cement consumption, and has obvious thickening and water retaining functions; concrete mixtures do not bleed or disintegrate, the homogenization and workability of the concrete are improved, and the concrete has important significance for saving energy and reducing emission.

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.

A preparing method of a viscosity modifying material specially used for self-compacting concrete for CRTSIII type plates is disclosed. The viscosity modifying material is prepared by fully mixing fumed silica, calcium carbonate, low-viscosity hydroxyethyl cellulose, high-viscosity hydroxyethyl cellulose, a thixotropy modifier and water-soluble polymer rubber powder. The viscosity modifying material comprises 45-55% by mass of the fumed silica, 43-55% by mass of nanometer calcium carbonate, 0-0.5% by mass of the low-viscosity hydroxyethyl cellulose, 0-0.5% by mass of the high-viscosity hydroxyethyl cellulose, 0-2% by mass of the thixotropy modifier and 2-4% by mass of the water-soluble polymer rubber powder.

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 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 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 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 provides a fiber-reinforced concrete material and a preparation method thereof, and relates to the technical field of concrete materials. The fiber-reinforced concrete material is prepared from the following raw materials: modified bentonite, layered hypophosphite, silicate cement, a fiber material, steel fiber, boric acid, a reinforcing agent, an organic thickening agent and water.The fiber-reinforced concrete material provided by the invention is good in corrosion resistance, strong in sealing property, long in service life, good in strength and good in impact resistance; thebonding of the modified bentonite and the layered hypophosphite with a silicate cement matrix is good, and in the cement matrix, the modified bentonite and the layered hypophosphite are uniformly distributed and are good in dispersity; after the modified bentonite, the layered hypophosphite and the silicate cement are added to prepare the concrete material, the prepared concrete material is high in strength and good in heat stability; by embedding of the fiber material and the steel fiber into a silicate cement matrix, the comprehensive dynamic and mechanical properties such as impact resistance, anti-freezing property and durability of the concrete material are enhanced.

The invention relates to the field of building construction, and provides pebble stratum deep and large foundation pit underground diaphragm wall retaining wall slurry. The pebble stratum deep and large foundation pit underground diaphragm wall retaining wall slurry is prepared from, by weight, 1,000 parts of water, 75-85 parts of bentonite, 3-5 parts of sodium carbonate and 0.5-1.5 parts of sodium polyacrylate. The invention further provides a preparation method of the pebble stratum deep and large foundation pit underground diaphragm wall retaining wall slurry. The pebble stratum deep and large foundation pit underground diaphragm wall retaining wall slurry has the advantages that sodium polyacrylate is adopted for replacing traditional CMC, the slurry wall protecting performance and theslurry recycling rate are greatly increased, and meanwhile corresponding environment contamination and material consumption are reduced; meanwhile, various indexes of the slurry prepared through theformula can meet the requirement of circulating slurry indexes, the wall protecting effect is good, and the groove wall stability is good.

The present invention provides an acryloylmorpholine polymer and the use thereof and a filtrate reducer for drilling fluid. The acryloylmorpholine polymer comprises structural units expressed by formula (1), structural units expressed by formula (2), and structural units expressed by formula (3), wherein, at least a part of the structural units expressed by formula (2) can be bonded with at least a part of the structural units expressed by formula (3) into cross-linked structural unit expressed by formula (4); wherein, R₁-R₉ are H or C₁-C₃ linear or branched alkyl respectively, y is an integer within 1-5 range, M is H or an alkali metal element, X is O or NH, and R₁₀ is C₁-C₅ linear or branched alkylidene. The acryloylmorpholine polymer and filtrate reducer for drilling fluid have outstanding filtrate reduction and viscosity increasing effects.

The invention provides a 3D printing engineering spoil ink material doped with regenerated powder based on a spoil autocompounding technology. The invention further provides a preparation method and application of the 3D printing engineering spoil ink material doped with the regenerated powder based on the spoil autocompounding technology and a 3D printing forming method. According to the 3D printing engineering spoil ink material doped with the regenerated powder based on the spoil autocompounding technology and the preparation method, engineering spoil resources of different types are fully utilized for autocompounding, the activity of the regenerated powder and the 3D printing in-situ construction advantages are combined, the problem that a large number of spoil resources cannot be effectively utilized is solved, and the 3D printing engineering spoil ink material is suitable for industrial production. And the method has the advantages of low carbon, environmental protection, rapid construction and the like, is beneficial to the sustainable development requirement and industrial development trend of engineering, provides a certain application foundation for the carbon reduction requirement of the construction industry, and has relatively high economic benefits and social values.

Invert emulsion drilling fluids having a combination of fatty acids derived from waste vegetable oil (WVO) and a fatty amine as a rheology modifier are provided. An invert emulsion drilling fluid may include a water in oil emulsion, an invert emulsifier, a fatty amine having six to thirty carbon atoms, and a fatty acid having six to eighteen carbon atoms. The fatty acid is provided by esterifying a waste vegetable oil to produce a methyl ester of the waste vegetable oil and cleaving an ester group from the methyl ester of the waste vegetable oil. The invert emulsion drilling fluid may be formulated free of organoclay. Methods of drilling a wellbore using an invert emulsion drilling fluid are also provided.