88results about How to "Control clotting time" patented technology

The present invention discloses a high-performance flame-proof abrasion-resisting composite material which is prepared mainly by the components of particle material alumina or/and corundum or/and mullite 50-70 parts; hard particle 5-25 parts; binding agent 8-25 parts; aluminum oxide micro powder or/and silicon micronized quartz powder 8-15 parts and surfactant 0.1 parts. The composite material is developed according to the scientific knowledge obtained in the long-term researching and producing for the flame-proof abrasion-resisting composite material in our company and absorbing the latest accomplishment of the present material science, the material has the advantages of increasing the high-temperature bonding strength and toughness of the composite material, increasing the binding ability of the interface between the composite material and the equipment, facilitating the two sides forming a compact and high-strength whole body, optimizing the capability of the composite material in the high-temperature state, prolonging the service lifetime of the equipment, reducing the number of the breakdown maintenance, reducing the material consumption and the labor intensity of the worker thereby obtaining the purpose of increasing the economic benefit of the enterprise.

The invention relates to a method for controlling setting and hardening processes of magnesium phosphate cement. According to the method, the heat releasing speed of the magnesium phosphate cement is reduced by increasing addition of borax retarder to delay setting of magnesium phosphate cement mortar and adjust the setting time of the mortar within 20-150 minutes effectively, then a heat-transfer process between the mortar and an environment and the setting and hardening processes of the mortar are accelerated by increasing early environmental temperature of the mortar, and the early strength is form quickly and reaches 20-30MPa in an hour. The method solves the problem that the early strength of a magnesium phosphate cement system develops slowly due to the short setting time and a larger mixing amount of the borax retarder when the magnesium phosphate cement serves as a quick repairing material for a repairing project to some extent. Available test results indicate that the method can control the setting and hardening processes of the cement conveniently and effectively.

The invention discloses a high fluidization micro expansive high-strength grouting material which comprises the following raw materials by mass percentage: 23-34% of cement, 3-5% of microbead, 5-7.5% of phosphorus slag composite powder, 2.5-3.5% of silica fume, 2.5-3.5% of quartz powder, 46-55% of fine aggregate, 0.7-1% of water reducer, 0.01-0.03% of defoaming agent, 2.5-3.5% of expanding agent and 0.5-1% of early strength agent. The grouting material has the advantages of high strength in the early stage and later stage, good flowing property and adjustable expansiveness by taking the cement as a major binding material and employing the silica fume, the microbead and the phosphorus slag composite powder with different hydration activities together with a chemical additive matched with a binding material system and an aggregate system with reasonable gradation, and is particularly applicable to high precision equipment mounting, secondary grouting of an equipment foundation, bolt anchoring, crack repairing, duct grouting and the like.

The invention discloses a shield synchronous grouting construction material including, by weight, 200-300 parts of composite Portland cement, 400-600 parts of fly ash, 50-80 parts of 200-mesh calcium based bentonite, 1200-1300 parts of grading river sand, 0.4-0.6 parts of hydroxypropylmethyl cellulose, 0.5-3 parts of a water reducer, 0.3-1 part of a retarder, 1-3 parts of an early strength agent and 16-24 parts of a volume stabilizing agent. Through reasonable adjustment of composition and content of the components, the compressive strength, bleeding ratio, setting time and flowability of the construction material are controlled, so that the construction material has long initial setting time, is quick in early strength development, is not liable to dissociation, has good volume stability, can effectively fill in gaps in buildings and prevent floatation and deformation of tunnel segments, has good flowability and anti-dispersing property, and is easy to transport and to store for a long period.

The invention provides a cement grouting material with self-compaction and high fluidity. The cement grouting material comprises anti-cracking mortar, flow promoting components, a plasticizer, coagulation delaying components and a coagulation accelerating component. The anti-cracking mortar comprises, by mass, 4-8% of Portland cement, 38-47% of sulfate aluminum cement, 42-52% of quartz sand, 4.6-4.9% of swelling agents and 0.1-0.4% of polypropylene fibers. The flow promoting components include water reducing agents and defoaming agents. The plasticizer is cellulose ether. The coagulation delaying components include one or more of tartaric acid, sodium gluconate and citric acid. The coagulation accelerating component contains calcium hydroxide. The cement grouting material can complete grouting on the condition of self-gravity and can be grouted successfully one time during high-altitude operation of a support and an inhaul cable pipeline of a bridge with no need for vibrating or secondary grouting; construction of the material is simple since it is only required to add water; the grouting material can be used in construction at a low temperature.

The invention discloses a preparation method of a low-alkali polymer high-efficient liquid setting-accelerator for sprayed concrete. The preparation method comprises the following steps: (1) preparing an aluminate mother solution; (2) preparing a modifying agent; (3) preparing a low-alkali polymer high-efficient liquid setting-accelerator. The disclosed low-alkali polymer high-efficient liquid setting-accelerator has a uniform and stable property and strong adaptability; the mixing amount is 2 to 4% of the cement mass, the initial setting time is within 2 minutes, the final setting time is within 5 minutes, the strength loss in the later stage of concrete is within 10%; furthermore, the liquid setting-accelerator can efficiently reduce the dust amount and resilience value during the sprayed concrete construction and improves the strength of sprayed concrete.

A method of applying a bioactive agent and/or a polymerization or cross-linking rate modifier and/or a polymerization initiator to an applicator tip includes dissolving or dispersing the rate modifier, the initiator, and/or the bioactive agent in a low boiling point solvent, applying the resulting solution or dispersion to the applicator tip, and drying the applicator tip. The initiator and/or rate modifier is preferably applied in a methanol solvent and distributed along a concentration gradient on the applicator tip.

The invention discloses a storage iron runner castbale produced by adopting a waste iron runner material. The storage iron runner castable comprises the following components in parts by mass: 15-20 parts of waste iron runner material, 20-30 parts of brown fused alumina particles, 3-5 parts of brown fused alumina fine powder, 5-10 parts of electric smelting compact corundum particles, 2-5 parts of electric smelting compact corundum fine powder, 3-5 parts of magnesia-alumina spinel, 10-20 parts of silicon carbide, 2-5 parts of silicon powder, 1-2 parts of activated aluminum oxide micro powder, 4-6 parts of crystalline flake graphite, 0.5-1 part of a silane coupling agent, 3-8 parts of aluminate cement, 1-4 parts of a compound water reducer, 1-2 parts of a compound antidetonant, and 1-2 parts of an antioxidant. The storage iron runner castable makes full use of the waste material, thus greatly lowering comprehensive cost; due to the materials of the different particle sizes, the construction efficiency is improved; for the addition of the crystalline flake graphite and magnesia-alumina spinel powder, the molding density of the castable is improved, the castable is promoted in sintering, and the density, strength, volume stability and residue resistance of the castable are improved.

The invention discloses an industrial solid waste autoclaved aerated concrete block and a preparation method thereof. The concrete block uses fly ash, carbide slag, red mud, lime, desulfurized gypsumand cement as main raw materials and aluminum powder, sodium hydroxide, water glass and the dispersing agent silica fume as additives; the coal ash reacts with components in the carbide slag to generate ettringite, so the strength of the concrete block can be enhanced; a large amount of aluminum oxide contained in the red mud can a replace part of lime and undergo a hydration reaction with the cement, and the aluminum oxide in the red mud can react with calcium hydroxide in the carbide slag, so the strength of the block is enhanced; the coal ash, the carbide slag and the red mud react with oneanother to generate hydrated calcium silicate and hydrated calcium aluminate, so the structural compactness of the block can be improved; and the additives can enhance the foaming stability of the aluminum powder and improve the early strength of the block under an alkaline condition. The method is green and environment-friendly, and the waste of non-renewable resources is effectively reduced.

The invention relates to a spraying method of a secondary solution for improving expansive soil. The spraying method is characterized by comprising the following steps of: (1) dissolving water glass with the mass m1 into water with the mass mw1 to prepare water glass solution, uniformly spraying the water glass solution into dry expansive soil with mass ms, mixing uniformly, standing for 2-12h for later use; and (2) dissolving aluminum sulfate powder with mass m2 into water with mass mw2 to prepare an aluminum sulfate solution, uniformly spraying the aluminum sulfate solution in a standby soil sample obtained in the step (1), mixing uniformly, standing for over 2h, and carrying out compaction treatment when the moisture content is reduced to the optimal moisture content. Compared with the traditional method for improving lime or cement and the like, the spraying method is simple in process and remarkable in effect and meets the requirement for environment friendliness.

The invention relates to a concrete retarder, which comprises the following components: 15-20 parts of sucrose, 10-25 parts of glucose, 9-16 parts of phosphoric acid, 5-14 parts of disodium phosphate, 3-7 parts of trisodium phosphate, 6-9 parts of disodium hydrogen phosphate, 8-20 parts of sodium pyrophosphate, 9-15 parts of alkyl phosphate, 3-7 parts of disodium ethylenediamine tetraacetate, 2-9 parts of humic acid, 5-11 parts of sodium fluosilicate, 8-13 parts of methylene phosphate derivatives, 5-12 parts of calcium sodium ethylenediamine tetramethylidene phosphate, 4-9 parts of dimethylamine, 8-17 parts of formaldehyde, 6-14 parts of phosphorous acid, and 4-12 parts of a mixture of boric acid, sodium bicarbonate and tartaric acid according to the ratio of 3 to 5 to 2.

The invention provides a special foam concrete for exterior wall external thermal insulation system engineering. The special foam concrete comprises the following components in parts by weight: 100 parts of a cementing material, 0-50 parts of an admixture, 2-10 parts of a high polymer, 0.5-2 parts of fiber, 2-10 parts of a foaming agent and 2-15 parts of an additive. According to the special foamconcrete provided by the invention, other components are introduced into the common foam concrete, so that the special foam concrete has the characteristics of good fluidity, crack resistance, light weight, good affinity with a thermal insulation material, high bonding strength, adjustable setting time, function of repairing defects of a base wall, and the like, and the special foam concrete is filled between the insulation board and the base wall to play the role of bonding and repairing.

The compound contains water, cement, sand material, flyash. The characteristic is that it also contains compound high-efficiency water-reducing mould-protecting agen, cement is aluminate sulfide cement 500-550, flyash 50-55, water 185-195, compound high-efficiency water-reducing mould-protecting agent 11-15, weight sand ratio of sand material is 38-42 percent. the compound high-efficiency water-reducing mould-protecting agent is composed by naphthalenes high-efficiency water-reducing agent, boric acid and xylon calcium sulphonic acid, weight percentage of each compound are azyl sulfonate high-efficiency water-reducing agent 32-38, nephthalenes high-efficiency water-reducing 37-43, boric acid 12-18, xylon calcium sylphonic acid 7-13.

The invention discloses super-early-strength type ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of building materials. The super-early-strength type ultra-high performance concrete is prepared from the following components in parts by weight: 50 to 100 parts of cement, 10 to 30 parts of silica fume, 5 to 20 parts of fly ash, 80 to 150 parts of aggregate, 0.1 to 2 parts of slaked lime, 5 to 25 parts of steel fiber, 1 to 5 parts of a water reducing agent, 0.05 to 0.5 part of a retarder, 0.01 to 0.2 part of a coagulant and 10 to 30 parts of water. The super-early-strength type ultra-high performance concrete has the characteristics of super early strength, ultrahigh later strength, ultrahigh durability, controllable setting time, excellent working performance and the like, and has important practical value in various emergency repair projects and winter construction projects. The invention further discloses a preparation method of the super-early-strength type ultra-high performance concrete, wherein the preparation method is simple, easy to operate, easy to control preparation conditions and low in requirement for production equipment, and is easy to achieve industrial production .

The invention discloses a double-fluid deep-hole bottom fixed-point accurate mixed construction process and a grouting structure. An accurate mixing problem of double-fluid grouting is solved, the matching ratio of the double-fluid can be quantitatively adjusted through a double-high-pressure PVC (Polyvinyl Chloride) grouting pipe, and the setting time is controlled; a double-fluid slurry is mixed at a hole bottom predetermined area, so that a double-fluid grouting range is artificially controlled; with fixed-point accurate double-fluid grouting, the mixing distance and the mixing time of the double-fluid in a drill hole can be reduced, and the dispersion range of the double-fluid slurry is expanded; and the operation can be carried out simply. The technical scheme is characterized in that the double-fluid deep-hole bottom fixed-point accurate mixed construction process comprises the following steps of drilling to the depth of an intact rock, and downwards placing a steel sleeve pipe in a drill hole to the intact rock part; adopting the double-fluid slurry for sealing an outer wall of the steel sleeve pipe and a drill hole wall; continuously drilling to the estimated grouting depth, and downwards placing two grouting pipes in the drill hole; and sealing the grouting pipes and the drill hole wall, and forming dense confining pressure sections outside the grouting pipes.

The invention discloses a box-packed bean curd. The box-packed bean curd is made from 11-14 baume degrees of soybean milk and 3-5% by soybean milk mass of a composite coagulator water solution, wherein the composite coagulator water solution is prepared by mixing a composite coagulator and water according to the mass ratio of 1:2-4, the composite coagulator is prepared from, by mass, calcium sulfate 65-75%, glucolactone 20-30%, magnesium chloride 2-5%, and the sum of the components is 100%. The box-packed bean curd is hygienic and safe, good in toughness, stable in quality and convenient to store and transport, has a fine and smooth taste, is not tender after long-time boiling and is suitable for long-distance sales. The invention further provides a processing technology of the box-packed bean curd. The processing technology comprises the steps of material selection, soaking, cleaning, pulping, pulp screening, pulp flushing and the like, is simple in process step, good in operability and low in production cost and is suitable for industrialized large-scale production.

The present invention provides a dual-camera module assembling method, double camera modules and a mobile terminal. The method comprises the steps of assembling a first camera module at a first position of a dual-camera module support; injecting glue between the first camera module and the dual-camera module support; calibrating the first camera module during the glue solidification process; assembling a second camera module at a second position of the dual-camera module support; injecting the glue between the second camera module and the dual-camera module support; calibrating the second camera module during the glue solidification process, so that by increasing an assembly gap between the camera modules and the dual-camera module support, the calibration space of the camera modules is increased, the solidification time of the glue can be controlled, the influence of the manufacturing tolerance of the dual-camera module support is eliminated by utilizing the deformable characteristic of the glue, and the coaxiality of the double camera modules is guaranteed.

The invention relates to anticrack anticorrosion mass concrete and a preparation method thereof and belongs to the technical field of building materials. The invention provides the anti-crack anticorrosion mass concrete. The anticrack anticorrosion mass concrete is prepared from 1 part by weight of cement, 0.25-0.41 parts by weight of hearthstone powder, 0.50-0.65 parts by weight of water, 3.21-3.85 parts by weight of coarse aggregate, 2.51-3.5 parts by weight of fine aggregate, 0.015-0.032 parts by weight of a corrosion inhibitor, 0.005-0.012 parts by weight of a water reducer and 0.001-0.006 parts by weight of polypropylene fibers. The blast furnace base anticrack anticorrosion mass concrete, which is prepared from specific components and satisfies saline-alkali geological environment requirements, has good workability and high strength, is convenient for construction work control and concrete construction, has a simple formula, greatly saves a cost, is prepared through simple and easy processes, is free of mineral admixtures and can be promoted in saline-alkali geological environments in Vietnam and China.

The invention relates to a low solid-content accelerator and a preparation method thereof, which relate to a concrete additive, and especially relates to the low solid-content accelerator. The invention also relates to the preparation method of the accelerator. The low solid-content accelerator takes active aluminium hydroxide, aluminum sulfate, sodium silicate, sodium carbonate, sodium hydroxide,deionized water, and triisopropanolamine as raw materials for a reaction, and the above raw materials are subjected to a reaction to prepare mother liquor of the low solid-content accelerator; thickening agents such as sodium polyacrylate and maltodextrin as well as a stabilizing agent cellulose ether MF4 are added as a reaction auxiliary agent during usage of the mother liquor, the solid contentof the accelerator through complex formulation is 35%, an application amount of the low solid-content accelerator is reduced during usage, production usage cost can be greatly reduced, and the earlystage intensity of the concrete and the usage intensity at a later stage cannot be influenced.

The invention discloses a synchronous shielding grouting material composite admixture which comprises the following raw materials in percentage by mass: 10-20% of a coagulant, 10-20% of a retarder, 40-50% of an efficient water reducer, 10-20% of a tackifier, 1-5% of a defoaming agent and 1-5% of a plasticity expander. The admixture has the effects that in a high-pressure water-enriched stratum environment, on premise that equipment and pipelines are not changed, the curing time can be adjusted, the working performance loss is small within the curing time, and good water dispersibility resistance, efficient filling and rapid curing can be achieved.