607results about How to "Harden fast" patented technology

The present invention provides improved methods of consolidating particulate material in a subterranean zone penetrated by a well bore. The methods basically comprise the steps of coating the particulate material with a hardenable resin composition and irradiating the hardenable resin composition coating on the particulate material with microwaves to thereby accelerate the hardening of the resin composition whereby the particulate material is rapidly consolidated into a stationary permeable mass.

An injectable depot gel composition containing a polymer, a solvent that can dissolve the polymer and thereby form a viscous gel, a beneficial agent; and an emulsifying agent in the form of a dispersed droplet phase in the viscous gel. The injectable depot gel composition can be prepared by mixing the polymer and the solvent so that the solvent dissolves the polymer and forms a viscous gel. The beneficial agent is dissolved or dispersed in the viscous gel and the emulsifying agent is mixed with the beneficial agent containing viscous gel. The emulsifying agent forms a dispersed droplet phase in the viscous gel to provide the injectable depot gel composition. The injectable depot gel composition can deliver a beneficial agent to a human or animal with a desired release profile.

The invention discloses a concrete early-strength agent, which is characterized in comprising the following components according to weight percentage: inorganic salt early-strength component 35-55 percent, organic early-strength component 5-10 percent, water reducing component 15-25 percent, wherein the inorganic salt early-strength component is prepared by at least two among sulfate, carbonate, nitrate, and nitrite; the organic early-strength component selects any one among calcium formate, sodium acetate, calcium oxalate, triethanolamine, tri-iso-propanolamine and carbamide; the water reducing component selects one among naphthalenesulfuric acid type, melamine type and polycarboxylate type. The invention makes the concrete be coagulated and hardened rapidly under the condition of low temperature, so that the early strength of the concrete is greatly improved as well as later strength is ensured.

A method of making a rapid setting composition for cement boards is disclosed. Compositions including portland cement, fly ash, gypsum, alkanolamine and phosphate are disclosed. A synergistic interaction between the alkanolamine and phosphate increases the effectiveness of accelerating reactions thus allowing for quick setting and increased early-age compressive strength compositions.

The invention provides a grinding aid for slag cement. The grinding aid provided by the invention comprises the following components by weight percent: 5-20wt% of alcohol amine compound, 0.1-5wt% of hydroxypropyl methyl cellulose, 5-30wt% of polyhydric alcohol compound, 0.5-10wt% of sodium hexametaphosphate, 1-10wt% of soluble sulfate, 1-8wt% of sodium dodecyl benzene sulfonate and the balance of water. In the grinding agent provided by the invention, the hydroxypropyl methyl cellulose is beneficial for stimulating the activity of the slag, forming stable hydrous products in the reaction process, improving the property of the cement, improving the strength of the cement and improving the stability of the liquid grinding aid at the same time. Experimental result shows that the grinding aid is capable of increasing the breaking strength of the cement to 9.5MPa and increasing the compressive strength to about 55MPa.

The present invention is hot cast high temperature wear resistant ceramic material is one anti-wear refractory material suitable for fast hot repair of tertiary air duct, high temperature air duct, high temperature dust collector, etc in cement producing apparatus as well as thermal apparatus in iron and steel works, power plant, etc. The hot cast high temperature wear resistant ceramic material is powder comprising high alumina anti-wear refractory material as the aggregate, phosphate, phosphoric acid and aluminum dihydrogen phosphate as the binding agent, and additive. It has convenient repair construction process, high flowability, high strength, high heat resistance, high wear resistance, and high heat shock resistance.

The invention relates to a composite bonding wear-resistant castable refractory, which can be used for high-temperature kiln engineering. The amorphous castable refractory which is normal in coagulation, quick in hardening, low in porosity, high in strength and high in abrasive resistance is prepared from silica sol serving as a bonding agent, aluminate cement serving as a curing agent, alumina micro powder and wollastonite which serve as a compact agent, heat resistant steel filters serving as a reinforcing agent and corundum and alumina which serve as an aggregate. The composite bonding wear-resistant castable refractory is suitable for positions such as air pipeline elbows for the cogeneration of cement kilns, cyclone cones and linings for triple air pipe gates which are easy to wear in high-temperature kilns.

The invention discloses thermal insulation mortar which comprises the following components in percentage by weight: 20 to 60 percent of caustic calcined magnesia, 1 to 25 percent of fly ash, 5 to 35 percent of thickening time control agent, 0 to 40 percent of enhanced thickener, 1 to 20 percent of kieselguhr, 5 to 35 percent of expanded aggregate, 0 to 5 percent of polystyrene foam particles, 0 to 0.2 percent of polypropylene fiber, 0.5 to 8 percent of water-resisting admixture, and 0 to 2 percent of water reducing agent. The thermal insulation mortar has the characteristics of capability of coagulating and hardening quickly and having strong binding capacity with base materials, good volume stability, capability of producing volume micro-expansion in the process of coagulating and hardening, no crack, no splitting, strong water resistance, ageing resistance, long service life, light weight, and good heat preservation and heat insulation performance, wherein the coefficient of thermal conductivity is 0.05 to 0.30 W/m.k. The thermal insulation mortar has the advantages of no toxicity, odourlessness, zero radioactivity, no harm to human bodies, no pollution to environments, energy conservation, environmental friendliness and low production cost.

A self-customizable dental appliance adapted to lie within the mouth of a person including occlusal pads with a connecting arch or a u-shaped style base with upstanding labial and lingual walls. The appliance is formed of a semi-crystalline polyolefin polymer or crystallizable blend. In one embodiment, the appliance is formed of elastomeric propylene-ethylene polypropylene, optionally including high density polypropylene. An optional occlusal lifting pad can be used in the self-customizable dental appliance.

The invention relates to a desulfurization gypsum-based thermal insulation mortar and a preparation method of the mortar, belonging to the technical fields of solid waste comprehensive utilization and building material. The desulfurization gypsum-based thermal insulation mortar comprises the components in parts by weight: 1000 parts of desulfurization gypsum, 3-10 parts of white cement, 350-450 parts of glass beads, 5-15 parts of redispersible latex powder, 1-5 parts of wood fiber, 5-25 parts of sepiolite fiber, 1.5-5 parts of polypropylene (PP) fiber, 1-8 parts of polyvinyl alcohol, 1-5 parts of hydrophobic agent, 0.4-3 parts of retarder, 1-5 parts of water reducing agent and 2-6 parts of thickening agent. The desulfurization gypsum-based thermal insulation mortar is convenient to transport and has very strong thermal insulation performance and fireproof performance.

The invention relates to metakaolin-based polymer foam concrete and a preparation method thereof. Metakaolin, coal ash and a coagulation accelerating agent are added into a mixing machine in proportion to be mixed to be uniform, an alkali excitant and water are added in proportion, and mixing is carried out to prepare slurry; while the slurry is prepared, a foaming agent is diluted with water in proportion of 1: 15, a high-speed mixing machine or a vacuum foaming machine is adopted for preparing fine and stable foam; and according to density design requirement, the prepared foam is blended into the uniformly mixed slurry in volume ratio to be mixed and foamed, wherein the volume ratio of the foam to the slurry is (1-4):1, and mixing is carried out for 2.5-3min until the foam is uniformly dispersed in the slurry, thus freshly blended metakaolin-based polymer foam concrete is prepared. Compared with the traditional cement-based foam concrete taking silicate cement as a main cementing material, the metakaolin-based polymer foam concrete has the characteristics of environmental friendliness, higher strength, low thermal conductivity, good heat insulating property and the like, and can be used for producing various foam concrete products.

The invention relates to 3D printing mortar and a preparation method thereof and belongs to the field of building materials. The mortar is mainly composed of 70-90% of compound cement, 5-20% of quartz sand, 0.2-2% of lime, 1-5% of coagulant, 0-3% of water reducing agent, 0-3% of defoaming agent, 0-0.5% of thickener and 0.2-0.8% of fiber. The mortar can be quickly hardened and is good in thixotropy and flowability, initial setting time can be within 2 min at least, the requirement that the 3D printing mortar is quickly dried and hardened can be met, and later strength is high.

The invention aims to provide a modified sodium silicate binder for a cold core box and a preparation method thereof. The binder has the advantages of wide raw material sources, no toxicity or smell and good mechanical property and is applicable to mechanized core manufacture of the cold core box and manual core manufacture. The modified sodium silicate binder comprises the following chemical compositions in percentage by mass: 20 to 30 percent of SiO, 10 to 20 percent of Na2O, 0.5 to 19 percent of K2O, 1.0 to 20 percent of modifier and the balance of water, wherein the modifier can be aluminium hydroxide and/or zinc hydroxide, or one or more of amylin, sugar, molasses, polyacrylamide, sodium polyacrylate, sodium tripolyphosphate, cellulose, humic acid, sodium humate, sorbierite, xylitol and sodium silicate are added.

This invention relates to a bake-free casting material and method for casting the lining of iron runner in a blast furnace. The method comprises: cleaning residues at the bottom of the iron runner of a blast furnace, supplying a mold, stirring the bake-free casting material slurry, pouring into the mold, tamping with an insertion-type vibration stick to discharge bubbles and obtain compact casting material. The casting material is suitable for casting the lining of iron runner in a 1000 m3 or lower blast furnace with a single iron outlet, and the obtained lining of iron runner can be directly used for discharging molten iron after hardened without being baked. By the method, the lining of iron runner has compact surface and inside, so the iron runner has a long service life. The method has such advantages as low material consumption, low cost, few waste residues and low labor intensity.

The invention discloses a steam-curing-free early-strength steel fiber concrete pipe segment comprising ordinary Portland cement, early-strength sulphoaluminate cement, fly ash, slag, fine aggregate, coarse aggregate, water, a polycarboxylic acid type water reducer and end hook type steel fibers. The invention also discloses a preparation method of the steam-curing-free early-strength steel fiber concrete pipe segment. The steam-curing-free early-strength steel fiber concrete pipe segment is quick in coagulation and hardening and high in early strength, can reach the strength of 15MPa required by pipe segment demolding in 6-8 hours, and can be prepared into a concrete pipe segment for an underground structure by performing water curing in a 20 DEG C saturated calcium hydroxide solution for 24 hours and then performing natural curing for 28 days. The steam-curing-free early-strength steel fiber concrete pipe segment does not need steam curing, so that the curing mode of the pipe segment can be simplified, the curing time is shortened, a lot of manpower and resources are saved, and the popularization and application values are high.

This invention relates to a method for producing construction gypsum powder from ardealite. The method comprises: (1) prehomogenizing ardealite waste residue, placing in a continuous high-efficiency calcining kiln, and calcining; (2) taking out and aging naturally for 7-15 d; (3) milling into 100-200 mesh powder. This invention uses a unique calcination technique to produce high performance construction gypsum from ardealite waste residue, and has such advantages as no secondary pollution and saved water resource.

The present invention relates to an alkaline phenol formaldehyde resin for 3D printing, and a preparation method thereof, wherein the alkaline phenol formaldehyde resin comprises cresol, phenol, furfuryl alcohol, formaldehyde, propylene glycol methyl ether, sodium hydroxide, a coupling agent, and a modifier. According to the present invention, the large viscosity characteristic of the conventional alkaline phenol formaldehyde resin is removed in the alkaline phenol formaldehyde resin of the present invention, wherein the resin viscosity is controlled to equal to or less than 20 mpa.s (25 DEG C); the process resin is added with the right amount of modifier, such that the free formaldehyde content and the free phenol content in the resin can be effectively reduced and can be reduced to equal to or less than 0.1% so as to provide the mild property for the on-site work environment and so as not to produce the adverse reaction for people; and with the special synthesis and reaction conditions of the process, the prepared resin can achieve rapid hardening, the mold sand usable time is less than 2 min (25 DEG C), the 24 h mold sand tensile strength is more than or equal to 1.2 MPa, the modeling can be performed on the high heat resistance and high hardness sand mold, and the use requirement of the 3D printing technology can be completely met.

A high-cement-grout solidifying agent for the sludge or silt with 100-350% of water content is prepared from thioaluminate cement clinker, cube spar and calcium lime through proportionally mixing and grinding. Its advantages are quick solidifying and hardening, and high strength.

A motor vehicle has a support structure formed of a chassis frame and a vehicle body. The chassis frame and vehicle body are bolted together by four bolt locations in the area of upper supports of the spring struts of the front and rear axle. The chassis frame and vehicle body are also glued to each other along segments of the support structure thereof extending parallel to each other, wherein adhesive surfaces are located in the area between the front and rear bolt locations. The adhesive in the middle area of the motor vehicle ensures a large surface area for force application from the chassis frame into the vehicle body and vice versa, which is supplemented by the bolt locations outside of the adhesive joint.

The invention provides a reinforcing and repairing grouting material for construction in a minus-temperature environment in the technical field of construction materials, which comprises the following components in percentage by weight: 7 to 13 percent of magnesium oxide, 25 to 35 percent of potassium dihydrogen phosphate, 5 to 45 percent of quartz sand, 15 to 25 percent of fly ash, 1 to 2 percent of boric acid or borax or citric acid, and 1 to 2 percent of calcium lignosulfonate or sodium lignosulphonate. Compared with the prior art, the material has the characteristics of constructing and condensing to become hard to generate strength at the temperature of 18 DEG C below zero, along with high mobility, high early strength and the like.

The invention relates to lightly calcined dolomite thermal insulation mortar, which comprises the following components in part by weight: 20 to 60 parts of lightly calcined dolomite, 1 to 60 parts of flyash, 5 to 35 parts of retarding agent, 1 to 40 parts of strengthening and thickening agent, 1 to 20 parts of kieselguhr, 5 to 35 parts of expanded aggregate, 0.5 to 5 parts of polystyrene foam particle, 0.01 to 0.2 part of polypropylene fiber, 0.5 to 8 parts of water resistance additive, and 0.05 to 2 parts of water reducer. The thermal insulation mortar has the advantages of excellent thermal insulation property, good compression strength, freezing resistance and water resistance, good volume stability, low production cost, energy conservation, environmental friendliness and the like. The construction process is simple; and after construction, the lightly calcined dolomite thermal insulation mortar is not hollowed or cracked, and is particularly suitable for a thermal insulation material for building walls.

A medical irradiation apparatus comprising a main body, a luminous body comprised of a light emitting element provided in a light outlet of the main body, an annular reflective member with a reflective surface provided at the circumference of the luminous body, the reflective surface reflecting the light from the luminous body forward, and a lens member provided so as to cover a forward opening of the reflective member, the lens member refracting and transmitting the direct light from the luminous body and the light reflected from the reflective member. According to the apparatus, all the outgoing light from the lens member is emitted so as to direct into a specified irradiation area.