449 results about "Reduced properties" patented technology

The invention relates to low-viscosity easy-to-pump ultrahigh-strength concrete with average strength of 120MPa. The concrete comprises the following components at single-prescription dosage ratio of kg/m<3>: 400-440 parts of cement, 40-60 parts of silica fume, 60-80 parts of slag micro powder, 100-120 parts of microspheres, 700-750 parts of natural sand with fineness modulus of 2.8-3.2, 980-1,000 parts of stone, 19.5-22.75 parts of additive and 130-135 parts of mixing water, wherein the additive is a polycarboxylate-type high-performance water reducing agent Glenium 8008 and has high water reducing rate, strong viscosity reducing property and high slump retaining property; the expansion degree of the ultrahigh-strength concrete is kept at 700+/-50mm within 4 hours, the back taper time is controlled at 3-8 seconds, the viscosity is kept at 28-35Pa.s, and ultrahigh pumping of 300m and higher is easy to realize. The concrete provided by the invention can meet the performance requirements for ultrahigh concrete pumping of 500m and higher in terms of high slump retaining property, self-compaction property, strength property, low-viscosity property and the like.

The invention relates to medium-temperature high-performance water-based damping coating material and a preparation method of the medium-temperature high-performance water-based damping coating material. The coating material is made from binding base material, functional filling material, auxiliary agent and the like. The preparation method adopts a low-speed mixing, dispersion and three-roll grinding technology, thereby effectively avoiding cross linked deterioration of ternary polymer emulsion in the binding base material under high temperature because of high-speed mixing and dispersion. The coating material is added with the ternary polymer emulsion, addition agent and the functional filling material, wherein the ternary polymer emulsion belongs to rubber emulsion that is beneficial to improve the damping capacity and the drying of coating films, and the functional filling material has the functions of damping vibration, reducing noises, retarding flame and the like. The coating material can form a network structure through cross linked solidification under low-temperature baking of about 60 degrees, thereby obviously increasing the damping recombination loss factor, the flame-retardant heat-insulation performance and the sound-absorbing noise-reducing property. The water-based damping coating material is widely applied to railway vehicles, has the advantages of high damping recombination loss factor, small specific weight, strong adhesive force, good flame-retardant performance, low toxicity level and easy construction, and is not easy to crack in thick coatings.

The invention relates to an earthquake monitoring alarm system belonging to the technical field of earthquake prediction and alarm. Monitors are placed at a deep position of stratum to form a network monitoring system which mainly monitors shake and temperature change, are connected with a ground monitoring center and an alarm playing system to release alarms in time by alarm procedure management and various media, and form an earthquake prediction and an alarm system together with an alarm receiving and playing system. The earthquake monitoring alarm system can provide certain advance time quantum disaster condition prediction and alarm for areas except an epicenter area and also can provide impending earthquake prediction for the epicenter area as far as possible so that disaster-affected area people can know that earthquakes happen at once from a few seconds to a few minutes in advance and then start to take risk avoiding measures in advance, and the purpose of saving more persons is achieved. The earthquake monitoring alarm system can continuously improve the data, enhance the accuracy rate of prediction and alarm and finally achieve the purpose of realizing imminent earthquake prediction; meanwhile, certain prevention measures can be taken for the earthquakes before the earthquakes so as to decrease casualties and reduce property loss.

A film forming method comprising: supplying a reactive gas comprising a compound including a metal atom between facing electrodes; arranging a substrate between the electrodes; making the reactive gas in a plasma state by applying a voltage between the electrodes under atmospheric pressure or under a pressure in a vicinity of the atmospheric pressure and discharging; and forming a metal film on a surface of the substrate by supplying a reducing gas having a reducing property into a plasma atmosphere in which the reactive gas in the plasma state exists.

A drying shrinkage-reducing agent which comprises a polymer containing as an essential component at least one structural unit (I) represented by the following formula (1):

wherein R¹, R², and R³ independently stand for a hydrogen atom, a methyl group, or a —(CH₂)_pCOOX group, wherein X stands for a hydrogen atom, a monovalent metal, a divalent metal, an ammonium group, an organic amine group, or a hydrocarbon group, and p is an integer of 0-2; and R⁴ stands for a hydrocarbon group of 4-30 carbon atoms,

and exhibiting surface tension in the range of 25-50 mN/m in a solution containing 0.2 mass % of the polymer in a cement supernatant is provided. The drying shrinkage-reducing agent manifests no dispersibility in an amount capable of attaining necessary drying shrinking-reducing properties and, when used in combination with a dispersing agent, acquires ability to adjust the dispersibility and the drying shrinkage-reducing properties fit for the purpose.

The invention relates to a water-based drilling fluid suitable for a long-section horizontal well of a shale gas and an application of the water-based drilling fluid. The water-based drilling fluid is prepared from the following components in parts by weight: 100 parts of water, 0.5-5 parts of bentonite, 0.1-0.4 part of sodium carbonate, 0-8 parts of an inorganic salt, 1-5 parts of a filtrate reducer, 0.1-1 part of a viscosity enhancer and carrying agent, 0-1.5 parts of a wetting agent, 0.5-5 parts of a shale inhibitor, 1-5 parts of a lubricant, 1-6 parts of a micro-nano blocking agent, 0-3 parts of a viscosity reducer, 0-1 part of a pH modifier and 0-280 parts of a weighting material. According to the drilling fluid, the density can reach 2.3g/cm<3>, the high-temperature and high-pressure filter loss is smaller than 5ml and the rheological property, the filtration reducing property, the lubricity and the inhibitive ability are equivalent to those of an oil-based drilling fluid; the surface performance of the shale can be improved, the hydrophobicity can be strengthened and the compressive strength of the shale is retarded; the water-based drilling fluid has good antifouling property and high sealing capacity; shale micro cracks can be sealed; pressure transmission is retarded or blocked; and the well-bore stability of the shale is facilitated.

The invention relates to a salt-tolerant resistance-reducing agent applied for a shale gas reservoir. The resistance-reducing agent is a biopolymer comprising an acrylamide unit and a propenyl quaternary ammonium salt unit. The weight percent of the acrylamide in the biopolymer is 10%-80%. The propenyl quaternary ammonium salt is one of a propenyl trialkyl ammonium chloride, an alkyl acrylamido propyl trialkyl ammonium chloride or a dialkyl diallyl ammonium chloride. The weight percent of the propenyl quaternary ammonium salt in the biopolymer is 20%-90%, and the molecular weight of the propenyl quaternary ammonium salt is 1*10<6> to 2*10<6>. The resistance-reducing agent provided by the invention can be used as resistance-reducing agents for fracturing flow-back fluid, cavern water and underground produced water, wherein the fracturing flow-back fluid, the cavern water and the underground produced water contain divalent metal ions, and the weight percent resistance-reducing agent provided by the invention for using is 0.05%-0.1%. The resistance-reducing agent provided by the invention has good salt tolerance and resistance-reducing properties, and overcomes problems, of other polypropanamide resistance-reducing agents at present, comprising salt tolerance deficiency in using processes and incapability of being applied for hypersalinity water that comprises Ca<2+> and Mg<2+> at the same time.

The invention provides environment-friendly water-based drilling fluid and a preparation method thereof. The water-based drilling fluid is prepared from the following raw materials in parts by weight: 100 parts of water, 1-5 parts of bentonite, 0.05-0.4 part of sodium carbonate, 0.5-3 parts of a filtrate reducer A, 0.2-3 parts of a filtrate reducer B, 0.1-1 part of a viscosity/yield boosting agent, 0.5-4 parts of an inhibitor, 1-5 parts of a lubricant, 2-6 parts of a micro/nano particle plugging agent and 0-200 parts of weighting materials. The preparation method of the drilling fluid comprises the steps of adding bentonite and sodium carbonate into water; sequentially adding the filtrate reducer A, the filtrate reducer B, the viscosity/yield boosting agent, the inhibitor, the lubricant and the micro/nano particle plugging agent; adjusting the pH value by using sodium carbonate; selectively adding the weighting materials until the density reaches the drilling requirements. The resisting temperature of the drilling fluid can reach 150 DEG C, EC50 is greater than 3.0*10<4>mg/L, and the drilling fluid is nontoxic and environmentally friendly and has good rheological property, filtration reducing property, rejection capability, lubricating property, pollution resistance and reservoir protection effect.

The invention discloses a preparation method and application for a fly ash based polymer cementing material and a porous concrete material. The fly ash based polymer cementing material is composed of fly ash, granulated blast-furnace slag, nanometer zeolite powder, gypsum powder, and a compound alkali activator prepared from potassium-sodium water glass and caustic alkali; porous concrete is prepared from the fly ash based polymer cementing material and special-grade coarse aggregates like basalt or granite, is applied in construction of road pavement and has the characteristics of high porosity, good water permeability, skid resistance and sound-absorptive and noise-reducing properties, high strength, stable volume, excellent durability, etc.; meanwhile, the fly ash based polymer porous concrete has simple preparation method and low production cost, and meets industrial production and construction requirements.

The invention relates to a composite catalyst capable of eliminating four main pollutants in diesel engine tail gas simultaneously and a method for purifying the diesel engine tail gas. The composite catalyst consists of an oxidation catalyst and a reduction catalyst, wherein the active components of the oxidation catalyst are selected from perovskite or similar perovskite composite oxides, and the reduction catalyst is an HZSM-5 molecular sieve modified by a transition metal oxide. The composite catalyst is filled into two catalyst bed layers in a constant temperature section of a reactor so that the diesel engine tail gas passes through the reduction catalyst bed layer and the oxidation catalyst bed layer and is warmed up to perform reaction, thus the aim of eliminating the pollutants of carbon particles, hydrocarbons, carbon monoxide, nitrogen oxide and the like simultaneously can be achieved. Because of the high efficiency oxidizing property and high efficiency reducing property, the used composite catalyst can purify the diesel engine tail gas under a comparatively mild condition.

The present invention discloses preventing data transmission interrupted protection method in multitape parallel SERDES data links. It contains chip through detecting data frame to detect link status, when detecting error state, system stopping through error state occurring link transmitting data; when detecting data link get right, system recovering through said link transmitting data. The present invention ensures data transmission without interruption and automatic recovering full speed transmission in link get right through link status automatic-detection and balance in SERDES link parallel transmission scheme. The present invention also provides high-speed number reduced property and flexible configuration ability, in low service flow rate user capable of active switching off one or more link in parallel SERDES data link without influencing data regular transmission.

A process for the production of an aqueous dispersion of metal nano particles comprising palladium is provided. The process comprises the admixture of a water soluble organic polymer, a palladium salt and a first reducing agent to an aqueous liquid. The first reducing agent is a metal-containing polymer which has reducing properties or a saccharide which has reducing properties. The nano particles can include a second metal. The dispersions can be used as catalysts for electroless plating, to produce heterogeneous catalysts and in the production of anti-microbial devices and compositions.

The invention discloses a solidifying agent for treating chromium-polluted soil, which comprises the following raw materials by weight: 40-65% of ground mineral slag, 10-20% of ground steel slag, 10-20% of meta-kaolin, 15-25% of an alkali-activator, 0-10% of pulverized coal ash, and 0-3% of ferrous chloride, wherein the free water contents of the raw materials are all not higher than 2%, and the above components are proportionally configured and uniformly mixed in a grinding machine. The product disclosed by the invention is used for solidifying chromium-polluted soil, and has both reducing property and gel property; and the dissolution rate of chromium in the solidified body is low and does not rebound with time, while the solidified body has high strength and good water resistance, and can be used for brickmaking and other building material purposes.

The invention discloses a sandwich damping composite material. The material comprises an outer layer, an inner layer and a damping layer, wherein the outer layer of the material is a structural layer made of a fiber reinforced resin-based composite material; the inner layer of the material is a sandwich layer consisting of closed-cell rigid foam; the damping layer is positioned between the structural layer and the structural layer or between the structural layer and the sandwich layer; a sandwich structure is formed by the outer layer and the inner layer of the material to improve the integral rigidity and strength of the material and achieve the certain effect of reducing vibration; the sandwich layer has weight reduction, heat preservation and sound insulation effects and can meet different requirements; and the damping layer improves the structural damping of the material. The material overcomes the defects that the mechanical property and damping property of the conventional damping composite material cannot be unified, and popularization is not facilitated due to high cost, and has high structural damping on the basis of having high rigidity and strength so as to have high vibration reducing property.

The invention discloses a shock-reducing rubber material with high mechanical property and a manufacturing method of the shock-reducing rubber material. The shock-reducing rubber material is characterized by comprising the components in percentage by mass: 30-55 percent of natural rubbers, 10-20 percent of ethylene-propylene-diene monomer rubbers, 10-20 percent of brominated butyl rubbers, 3-5 percent of short fibers, 10-15 percent of nano-carbon black, 10-15 percent of white carbon black (SiO2), 1-2 percent of stearic acid (SA), 3-5 percent of zinc oxide (ZnO), 3-4 percent of magnesium oxide (MgO), 1-2 percent of nano calcium carbonate, 2-4 percent of accelerants, 1-1.5 percent of paraffin, 2-3 percent of Vaseline, 0.5-1 percent of an anti-aging agent, 0.5-1 percent of a coupling agent, 1-3 percent of bis-silane tetrasulfide (Si-69) and 2-5 percent of sulphur (S). According to the shock-reducing rubber material, the mechanical strength, the anti-aging resistance and the oil-resistance performance of the rubber material can be improved, the corrosion to the material by mycete is postponed, the flexibility and relatively-high tension strength and elasticity of the material can be kept, so that the service life of the material can be greatly prolonged. The obtained product has the advantages that the loss factor index can reach 0.52-0.55, DIN abrasion performance index can reach 100-120 mm<3>, and the rubber material is high-elastic in shock-reducing property and has wide market application prospect.

The invention discloses a method for preparing vinyl aromatic line polyether graft concrete superplasticizer which is prepared by using the following steps: (1) esterification: catalytic esterification is carried out to chemtura alkyl diol monoalkyl ether and maleic anhydride for obtaining an esterification product; (2) copolymerization: under the action of initiator, the esterification product, vinyl aromatic monomer and vinyl acetate are copolymerized for obtaining a polymerization product; (3) sulfonation reaction: under the action of sulfonation reagent, two sections of sulfonation reaction (low-temperature and high-temperature sulfonation) are carried out to the polymerization product for obtaining a sulfonation product; and (4) neutral reaction: the pH value of the sulfonation product is adjusted to be 7-8, and then diluted by water for obtaining the concrete superplasticizer with certain concentration. The invention can adjust product performance by controlling the product structure, does not use solvent in the process of reaction, is non-toxic and non-polluting, is safe to the environment, and has stable product performance, better security and water reducing property.

The invention relates to a prevention method of shallow-buried steeply-inclined coal seam rock burst. The prevention method includes following steps: (A) drilling a hole from ground to pre-splitting blasting a terrane or a rock pillar in floor and roof of a coal seam; (B) performing water-injection softening and pressure-releasing blasting to a mined coal seam; (C) after the coal seam being mined, performing deep-hole blasting to the floor and roof of the coal seam so that a hanging arch of the floor and roof is cut in advance and accumulated bending elasticity energy is released; and (D) filling a goaf of a working face with nonflammable objects after the coal seam being mined. In the prevention method, energy of the floor and roof are released through various measurements so that a strong rock burst disaster caused by fractured terrane or the rock pillar in the floor and roof can be prevented well. The method can effectively reduce an apparent intensity of a dynamic disaster during a mining process of a shallow-buried steeply-inclined coal seam and can reduced property loss and danger of worker life.

The invention provides a preparation method of vanadium nitride. Vanadium compound with the valence state of above quadrivalence or the mixture of the compound and organic carbon or inorganic carbon are formed through briquetting with adhesive agent, vanadium is pre-reduced into a lower valence state with the hydrogen with reducing property at 700 DEG C, then the temperature is gradually increased to 1100 to 1900 DEG C, therefore, the vanadium nitride product is gotten through reduction and nitridation. The block-shaped product is formed by contracting the material and no further agglomeration and adhesive bonding phenomenon occurs among blocks. The invention has the advantage that the melting and agglomeration phenomenon of the high valence vanadium compound near by the melting point is avoided.

The invention discloses a corrugated metallic sheath inorganic mineral insulated cable and a manufacturing method thereof. The cable consists of an inner cable core, an insulating layer winding the outside of the cable core, and an outermost metallic sheath; the cable core is formed by twisting a bundle of copper wires, the insulating layer is an inorganic mineral insulated tape, the metallic sheath is a copper corrugated tube, corrugation of the copper corrugated tube has upper peaks and lower valleys, the cable core, the insulating layer and the copper corrugated tube have the same length, and the surface of the copper corrugated tube is provided with a welding seam with the same length of the copper corrugated tub along the axial direction. As the cable takes a corrugated shape, the cable is easy to be bent and mounted in a laying field, which lowers the construction cost, can prevent a cable conductor and the insulating layer from being directly burnt by flame, prevents a phase and phase conductor from short circuit, and prevents elevators and fire fighting devices from being incapable of operating without power supply, thus obtaining precious time to facilitate persons to escape in time, and reduce property loss.

A manufacturing method of an alkaline solution, comprising dissolving a gaseous molecule having oxidizing properties or reducing properties in an aqueous alkaline solution.

The invention provides a modified FeS nano-particle as well as preparation method and application thereof, wherein the modified FeS nano-particle comprises aFeS nano-particle and cross-linked polyvinylpyrrolidone; the cross-linked polyvinylpyrrolidone wraps on the surface of the FeS nano-particle to form a shell-core structure; the mass ratio of the cross-linked polyvinylpyrrolidone to the FeS nano-particle is (0.1-0.5):1.1. The preparation method of the modified FeS nano-particle c comprises the following step: importing N2 to stir and mix a cross-linked polyvinylpyrrolidone solution and a FeCl2.4H2O solution, dropwise adding an Na2F.9H2O solution under the condition of importing N2 and stirring to obtain the modified FeS nano-particle. The modified FeS nano-particle provided by the invention is high in reaction activity and large in specific surface area; both the Fe2+ and the S2- of the FeS nano-particle have reducing property and can be applied to the treatment of chromate wastewater, so that compared with the present widely applied zero-valent iron nano-particles, the modified FeS nano-particle is better in treatment effect.

A new pre-alloyed metal based powder, intended to be used in surface coating of metal parts. The powder is deposited using e.g. laser cladding or plasma transfer arc welding (PTA), or thermal spray (e.g. HVOF). The powder is useful for reducing friction and improving wear reducing properties of the deposited coating. Such coatings may also improve machinability. As friction or wear reducing component, inclusions of manganese sulphide or tungsten sulphide in the pre-alloyed powder may be used.

The invention relates to a copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide and a preparation method and application of the catalyst. The catalyst comprises the following components: 10wt% to 95wt% of a main component, CuO, 1wt% to 85wt% of a second component, ZnO, 1wt% to 85wt% of a third component, CeO2, and 0.0 to 40wt% of a fourth component, an oxide of metal M, wherein M is one or more selected from Zr, Mn, Mg, Fe, La, Pr, Nd and Sm. The copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide is prepared by the coprecipitation method. Compared with the prior art, the catalyst has the advantages that low-price rare earth elements are fully utilized, the preparation cost of the catalyst is obviously reduced, the oxygen storage and release capacity of the rare earth elements is utilized, the reducing property of the catalyst is improved, and the low-temperature activity of the catalyst is enhanced. Compared with the prior art, the catalyst provided by the invention has the characteristics of high activity at low temperature (0 to 50 DEG C), high removal depth (less than or equal to 10ppb), good stability, long service life and simple preparation process.

The invention discloses a high-activity granulated blast furnace slag and a preparation method thereof. In the process of grinding the granulated blast furnace slag, and a solid synergist is added in a ratio of 10-30%, through commonly grinding, the granulated blast furnace slag with a specific surface area of 350-600 m2/kg is obtained. The high-activity granulated blast furnace slag can be doped in concrete and cement products, because the granulated blast furnace slag has high activity and a certain water reducing property, while the water consumption is appropriately reduced, the early strength development of concrete and cement products can be promoted; meanwhile, concrete and cement products doped with the high-activity granulated blast furnace slag can achieve the design performance requirements thereof in advance under the condition of natural curing or non-autoclave normal-pressure steam curing; and the corrosion resistance and durability of concrete and cement products doped with the high-activity granulated blast furnace slag are also obviously improved. The main components of the solid synergist are as follows: active silicon, sulfate, high-activity calcium oxide, a small amount of organic matters, a moderate amount of other inorganic materials, so that the solid synergist belongs to a high-activity compound material.