394results about How to "High compressive strength" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The invention relates to an integrally-formed hollow-structure Pick racket and a preparation method thereof, and belongs to the technical field of Pick rackets. The hollow cavity shell is filled with the foam core layer, an opening is formed in the hollow cavity shell, and the foam core layer is obtained by conducting heat treatment foaming on a foaming raw material; the method further comprises the following steps that an integrally-formed hollow cavity shell with an opening is obtained through a blow molding technology; the hollow cavity shell is filled with foaming raw materials; the filled hollow cavity shell is subjected to heat treatment, so that the foaming raw materials are foamed, expanded and fused in the shell, and a foam core layer tightly combined with the shell is formed; according to the Pick racket, an adhesive interface existing in a traditional spliced racket is structurally and thoroughly eliminated, the risk of adhesive failure and layering after long-term use or damp is fundamentally avoided, the structural integrity of the racket is greatly improved, and the durable life of the racket is greatly prolonged.

The utility model discloses an adjustable clamp for ultrasonic vibration auxiliary low-voltage micro-arc machining, and relates to the technical field of ultrasonic vibration auxiliary machining. The clamp comprises a three-jaw chuck, an ultrasonic vibration device and a nylon outer shell. A threaded hole is formed in the tail end of the three-jaw chuck and used for being connected with the ultrasonic vibration device and the nylon outer shell. The ultrasonic vibration device is arranged in the nylon outer shell and comprises an ultrasonic transducer and an ultrasonic amplitude-change pole, and the ultrasonic transducer is formed by stacking piezoelectric ceramics and electrode plates and is fixed through a front end cover and a rear end cover; the nylon outer shell is of a square-outside and round-inside structure, the bottom of the nylon outer shell is matched with the rear end cover, and an opening is connected with the three-jaw chuck to provide insulation protection for the whole device. By combining low-voltage micro-arc machining with ultrasonic vibration, efficient and high-precision machining is achieved, and the ultrasonic vibration machine has the advantages of being compact in structure, high in stability, integrated in insulation design, adjustable in vibration direction and the like, and is suitable for precision machining of materials difficult to machine in the fields of aerospace, military industry, medical treatment and the like.

This application belongs to the technical field of grouting materials for tunnel engineering, specifically relating to a grouting material suitable for tunnel rock strata reinforcement and its preparation method. It includes component A and component B; by weight, component A comprises: 75-85 parts of a first base material, 10-20 parts of a coupling agent, and 2-5 parts of a catalyst; component B comprises: 70-80 parts of a second base material and 15-25 parts of a modifying accelerator; wherein, the first base material is a water glass solution, and the physicochemical properties of the water glass solution meet the following conditions: modulus > 2.5, Baume degree < 40°Bé; the second base material is composed of isocyanate compounds and glycidyl etheroxypropyl cage-like polysilsesquioxane in a weight ratio of 100:(11-23); the modifying accelerator includes polyvinylpyrrolidone and dicarboxylic acid alkyl ester compounds. The two base materials synergistically cure at low temperature to form a highly cross-linked organic-inorganic composite network, thereby significantly improving the compressive strength of the solidified body.

This invention belongs to the field of building repair materials technology and provides a water-resistant and freeze-resistant magnesium phosphate cement repair mortar and its preparation method. The raw materials of the water-resistant and freeze-resistant magnesium phosphate cement repair mortar include: modified magnesium oxide, potassium dihydrogen phosphate, admixture, retarder, fine aggregate, water-reducing agent and water. The preparation method includes: (1) dry mixing: the modified magnesium oxide, potassium dihydrogen phosphate, admixture, fine aggregate and retarder are dry mixed to obtain a dry material system; (2) wet mixing and molding: half the mass of water is added to the dry material system, and after stirring, the remaining mass of water and water-reducing agent are added, and stirring is continued to obtain the water-resistant and freeze-resistant magnesium phosphate cement repair mortar. The repair mortar has excellent water resistance, freeze resistance and mechanical properties. The preparation method has a simplified preparation process, low production cost, and can realize the high-value utilization of solid waste, meeting the needs of rapid repair of building projects in harsh environments such as dampness and cold.

The utility model discloses a corrugated case convenient to carry, including corrugated case body, the lower end fixed mounting of corrugated case body has supported device, the upper end of corrugated case body inserts and installs corrugated box lid. The utility model discloses a corrugated case convenient to carry, through still being provided with corrugated core in the corrugated case body, double -decked corrugated paperboard can provide double -decked support, and the compressive strength and the side pressure intensity not only are significantly higher than single corrugated paperboard, and double -decked structure also can reduce the deformation caused by humidity change, and further improve the use effect and service life of corrugated case, and the one side board on the corrugated box lid can be bent down, and the clamping block on the one side board can be inserted into the first slot and the second slot, avoid the corrugated case body when transporting external dust can enter its through the slot, in addition, through the pull -plate and raise the one side board, at this time, people can conveniently take up and carry the corrugated case body through the slot.

The application relates to the technical field of tunnel construction, and discloses a combined segment structure, which comprises a UHPC segment and concrete test blocks, a plurality of concrete test blocks are arranged on the outer side surface of the UHPC segment in sequence along the curvature direction of the UHPC segment, the UHPC segment is provided with main reinforcement and stirrups, the main reinforcement is provided with a plurality of strips along the curvature direction of the UHPC segment, a plurality of stirrups are sequentially sleeved on the plurality of main reinforcement and are connected with the main reinforcement through binding, the concrete test blocks are provided with transverse steel bars and longitudinal steel bars, the transverse steel bars extend to the outside of the concrete test blocks and are overlapped with the stirrups, and the longitudinal steel bars extend to the outside of the concrete test blocks and are overlapped with the main reinforcement. Compared with the prior art, the structure design realizes optimal control of material cost by filling the concrete test blocks in the non-key stress area under the premise of hardly sacrificing the core performance of UHPC materials such as strength, durability and stress condition, and effectively eliminates the core economic obstacle in the popularization process of the UHPC shield segment.

The present application belongs to the technical field of aluminate binder production, and particularly relates to a preparation method of aluminate binder. Main raw materials of aluminum hydroxide, calcium chloride, calcium oxide and aluminum oxide are used, accurate and fine batching is carried out according to the corresponding chemical composition of the mineral phase composition, and wet grinding is carried out by using a ceramic grinding process, so that the super-micro powder raw material with extremely high fineness and extremely high homogenization degree can be obtained. After the powder is subjected to pressure filtration separation, the powder is subjected to drying treatment, and then the automatic forming equipment is used to press the raw material blank into the tunnel kiln for calcination. After the calcined blank is crushed and ground, the aluminate binder is finally prepared.

This utility model relates to the field of foundation pit protection technology and discloses a protective device for water tank foundation pits. It comprises at least one set of two main protective railings, two connecting plates, and secondary protective railings equidistantly arranged between the two connecting plates. Movable seats are fixedly installed at equal intervals on the inner side of each connecting plate. This device achieves overall optimization of the protection system through a multi-layered reinforcement structure. The double-rib design built into the main protective railings forms a parallel reinforcement structure, effectively resisting the horizontal earth pressure on the sidewalls of the foundation pit. Experimental calculations show that under the same load conditions, the deformation of the railing is reduced by more than 40% compared to traditional single-layer structures. The hollow core slab uses a grid structure composed of reinforcing rib seats and reinforcing rib columns to form a three-dimensional support system. The diameter of the reinforcing rib columns is 1 / 3 to 1 / 2 of the height of the reinforcing rib seats, and the surface is provided with annular reinforcing ribs. This parameter configuration increases the compressive strength of the hollow core slab to over 8 MPa.

The utility model relates to the technical field of alkaline water hydrogen production electrolytic cell, specifically to a kind of alkaline water hydrogen production electrolytic cell with cooling device, including the end pole plate of alkaline water hydrogen production electrolytic cell, cooling cavity being arranged in the inside of end pole plate, the cooling cavity in the inside of end pole plate is connected with circulating cooling system;Further improved scheme also includes in the inside cooling cavity being connected with circulating cooling system in intermediate pole plate is set to the scheme of the utility model can reduce the temperature of end pole plate and intermediate pole plate place sealing washer, to improve the compression strength of this sealing washer, solve end pole plate and intermediate pole plate place sealing washer more easily failure, damage problem, improve the working reliability of alkaline water hydrogen production electrolytic cell, and effectively prolong the service life of alkaline water hydrogen production electrolytic cell.

The invention belongs to the technical field of solid waste treatment and utilization, and particularly relates to modified manganese slag and application thereof in preparation of a cement material. The modified manganese slag disclosed by the invention is prepared by a method comprising the following steps: uniformly mixing maleic anhydride grafted polyethylene, epoxy group modified manganese slag, epoxy group modified nano alumina fiber and epoxy group modified basalt fiber, and then performing melt extrusion to obtain a polyethylene grafted manganese slag-polybasic fiber compound, and uniformly mixing the polyethylene grafted manganese slag-polybasic fiber compound and 5-chlorosulfonyl-2-hydroxybenzoic acid, and carrying out melt extrusion to obtain the modified manganese slag. The basalt fiber and the nano alumina fiber are combined with the manganese slag through chemical bonds and polyethylene long chains to form a compound, so that the combination stability and dispersion uniformity of the basalt fiber, the alumina fiber and the manganese slag can be improved, and the basalt fiber and the alumina fiber can play an anchoring role in a cement material; the mechanical strength and the low-temperature freezing resistance of the cement material are improved.

The invention relates to the technical field of cement and concrete, in particular to a Bayer process red mud volcanic ash activity evaluation method which comprises the following steps: calcining Bayer process red mud to be detected to obtain calcined Bayer process red mud; the polymerization degree of the calcined Bayer process red mud is measured by adopting Fourier transform infrared spectroscopy, the polymerization degree of the Bayer process red mud is in negative correlation with the activity, the pozzolanic activity of the Bayer process red mud is evaluated by measuring the polymerization degree, and the pozzolanic activity of the Bayer process red mud is evaluated by adopting the Fourier transform infrared spectroscopy to measure the polymerization degree of the Bayer process red mud. The polymerization degree of the red mud is reduced along with the increase of the volcanic ash activity and is in negative correlation, and the compressive strength and the dissolution solubility of Si + Al are in positive correlation with the volcanic ash activity of the red mud.

This utility model discloses an air-drying device for imitation ancient Beijing bricks, including an outer shell, a portion of which is pre-buried underground, with an opening at the top and a height of more than 60cm above the ground; an inner shell, with a top cover welded to its top, which is inserted into the outer shell through the opening, forming a ventilation cavity between the inner and outer shells; the top cover is detachably fixed to the outer shell, with an assembly port in the middle of the top cover connecting to the inner shell, and support surfaces formed on both sides of the assembly port; ventilation holes are evenly distributed on the outer wall of the inner shell; and a carrier structure, on which the air-dried brick blanks are supported. The carrier structure is hoisted to the assembly port by a hoisting device and inserted downwards into the inner shell, with the carrier structure limited by the support surfaces.

This invention provides a multi-scale corn stalk cellulose-reinforced cementitious material and its preparation method. The multi-scale corn stalk cellulose-reinforced cementitious material comprises multi-scale corn stalk cellulose and cement. The multi-scale corn stalk cellulose has both micron-fiber and nanofiber structures. The micron-fibers have a diameter of 1-5 μm and a length of 500-3000 μm, and the nanofiber structures are mainly distributed on the surface of the micron-fiber structures, with a diameter of 1-5 nm and a length of 100-2000 nm. The multi-scale corn stalk cellulose-reinforced cementitious material provided by this application exhibits higher flexural and compressive strengths (10-30% increase) than the control group cement, and has broad application prospects in the field of construction engineering.

The invention discloses a degradable carton containing modified plant fibers and a preparation method of the degradable carton, and relates to the technical field of carton production. According to the degradable carton containing the modified plant fiber, the degradable carton is formed by splicing corrugated boards, and the corrugated boards are prepared from, by mass, 45-60 parts of the modified plant fiber, 25-35 parts of paper pulp, 5-10 parts of a biodegradable adhesive, 5-15 parts of filler, 1-5 parts of a reinforcing agent, 0.5-3 parts of a waterproof agent and 90-110 parts of deionized water. Through synergistic modification of alkali treatment and an exclusive interface coupling agent, hydrophilic hydroxyl groups on the surfaces of the natural plant fibers are effectively hydrophobized, and the interface compatibility and dispersion uniformity between the fibers and a paper pulp matrix are remarkably improved, so that the overall compressive strength and structural stability of the carton are greatly improved; the problem that the mechanical property is reduced due to direct use of natural plant fibers is solved.

The application provides an electric heating device for a strip steel heat treatment furnace, which comprises an electric heating radiation tube mechanism and an atmosphere protection cover mechanism, the electric heating radiation tube mechanism is horizontally suspended in the strip steel heat treatment furnace, one end of the electric heating radiation tube mechanism is fixed on a side wall of the strip steel heat treatment furnace, the end of the electric heating radiation tube mechanism is exposed to the strip steel heat treatment furnace, and the other end of the electric heating radiation tube mechanism extends into the strip steel heat treatment furnace, and the atmosphere protection cover mechanism covers the end of the electric heating radiation tube mechanism connected with the strip steel heat treatment furnace and is fixed on the wall of the strip steel heat treatment furnace, the electric heating device has the advantages of low cost, high temperature control precision, good energy-saving effect, long service life and low maintenance cost.

The invention discloses self-compacting concrete and a preparation method thereof, and relates to the technical field of concrete, and the concrete comprises cement, fly ash, mineral powder, water, sand, stone and a modified water reducer. The modified water reducing agent is a polymer prepared from a hydroxyl-containing monomer I, a double-bond-containing acyl chloride monomer II, an unsaturated polyether monomer III and a double-bond-containing monomer IV in a mass ratio of (0.5-1.5): 1: (9-12): 1 through esterification reaction and double-bond addition polymerization, and hydroxyl, carboxyl and a polyether side chain are introduced into a molecular chain of the polymer at the same time. According to the water reducer, through the synergistic effect of hydrogen bond stable adsorption, steric hindrance and electrostatic repulsion, the compressive strength of concrete is improved, the slump is reduced, the balance of super-long retarding and high-strength development is achieved, and the comprehensive performance is excellent.

The utility model discloses a pole plate and an electrolytic bath, and relates to the technical field of electrolysis, the pole plate comprises a plate body, a pole frame and an outer frame, the pole frame is arranged on the peripheral side of the plate body, the outer frame is arranged on the periphery of the pole frame in a surrounding mode and fixed to at least one of the plate body and the pole frame, and the outer frame is arranged on the periphery of the plate body. And the compressive strength of the outer frame is higher than that of the pole frame. According to the technical scheme, the structural stability of the polar plate is improved, and the structural stability of the electrolytic cell is guaranteed.

The application discloses an extrusion blow molding product with high rigidity and a preparation method thereof, and relates to the technical field of packaging materials. The extrusion blow molding product comprises the following components in percentage by weight: bimodal polyethylene 25-85%, unimodal polyethylene 15-75%. The application effectively improves the technical defects of narrow temperature window, uneven wall thickness, melt easy sagging, blow breaking, large flash and the need to reform the bottle blowing equipment when using bimodal polyethylene alone by blending bimodal polyethylene with unimodal polyethylene and adjusting the blow molding process. Meanwhile, the high rigidity of bimodal polyethylene is retained, the compression strength of the prepared blow molding product can be increased by 20% at most compared with the unimodal polyethylene product, the product weight per unit area is reduced by 7-8%, and the raw material cost can be greatly reduced.

This invention provides a high-strength, pressure-resistant tapered roller bearing for tunnel boring machines (TBMs), relating to the field of core TBM components. It includes an inner bearing ring, an outer bearing ring, a bearing cage, rolling elements, a speed sensor, a lubrication discharge pipe, a waste liquid separator, and a switching mechanism. The outer bearing ring is located outside the inner bearing ring. The bearing cage is located outside the inner bearing ring. The rolling elements are located inside the bearing cage. The speed sensor is fixedly connected to the upper front end of the outer bearing ring. The lubrication injection pipe is fixedly connected above the outer bearing ring. The lubrication discharge pipe is fixedly connected below the outer bearing ring. The waste liquid separator is fixedly connected below the outer bearing ring and communicates with the lubrication discharge pipe. The switching mechanism is located outside the outer bearing ring, enabling intelligent switching between two lubrication media and solving the problem of limited applicability of tapered roller bearing lubrication systems in TBMs.

This utility model relates to the field of electronic paper display technology, specifically to a plasma display module with a polymer dielectric coating, comprising: a first substrate and a second substrate, the second substrate being disposed opposite to the first substrate, forming a plasma display cavity between the first and second substrates, the plasma display cavity being filled with plasma particles; a pixel electrode layer is disposed on the surface of the second substrate facing the first substrate, a filter layer is disposed on the surface of the first substrate facing the second substrate, and a conductive dielectric layer is disposed on the surface of the filter layer facing the second substrate; a polymer dielectric coating is disposed on the surface of the conductive dielectric layer facing the second substrate or the surface of the pixel electrode layer facing the first substrate. The polymer dielectric coating in this utility model possesses the characteristics of strong vertical conductivity and weak horizontal conductivity, which can effectively reduce the oblique electric field and help particles move orderly between the upper and lower substrates, thereby eliminating image retention.

This invention discloses a method for preparing a composite vibration damper consisting of a high-pressure-bearing sintered metal fiber body and a metal plate, belonging to the technical field of composite vibration dampers. By controlling factors such as the diameter, porosity, and thickness of stainless steel fibers, and through high-temperature sintering and pressure forming, this invention obtains a stable, high-compressive-strength stainless steel felt sintered body (SFB). The metal plate is then combined with the SFB to fully utilize the vibration damping energy of the SFB, resulting in a high-pressure-bearing metal fiber vibration damper. This vibration damper exhibits high compressive strength and excellent vibration damping performance, and also possesses characteristics such as corrosion resistance, high-temperature resistance, machinability, and strong environmental adaptability.

The utility model relates to transportation equipment technical field, concretely relates to a back unloads semi -hitch bottom plate, including the frame, the middle part of frame is installed with the bearing plate, the bearing plate includes the base body, is equipped with the anti -deformation structure on the base body, the both sides of base body are equipped with the fixed connection extension plate of the side plate welding of frame, the bending projection is along the length direction of base body and is integrated with base body through the form of stamping, every bending projection's both sides are equipped with the transition plate, the bending projection can strengthen the compression strength of car bottom plate, when the pressure of the material that accepts is applied, the strength of car bottom plate longitudinal is promoted, especially when transporting the box goods, still have good receiving effect, guarantee the bottom stable placement of material.

The utility model relates to the field of food heating and cooking, and discloses a meal box for a food heating device, which comprises a bottom shell, an upper cover and a protective frame, the protective frame is mounted on the upper cover and tightly presses the upper cover on the bottom shell, so that corners of the upper cover are respectively wrapped by the protective frame, and further reinforcing layers are formed at the corners of the upper cover. The food heating device is suitable for being used in cooperation with heating corollary equipment, simple in structure and high in pressure resistance, greatly improves use stability, guarantees even heating of food materials, avoids leakage of the food materials, and guarantees normal use of products.

The utility model relates to a cold storage composite wall heat preservation structure, it includes the multiple steel structure stand who is installed between civil engineering wall and storehouse roof structure and interval arrangement, the multiple horizontal keels who are installed between two adjacent steel structure stands and interval arrangement, install in the two galvanized angle iron keels of storehouse roof structure bottom surface and civil engineering wall top surface, install on two galvanized angle iron keel colorful steel sheet, install on each horizontal keel and extend in the direction of the colorful steel sheet direction of multiple first T type wood pile, install on multiple first T type wood pile stainless steel sheet and form between colorful steel sheet and the spray polyurethane of stainless steel sheet. The heat preservation effect is superior to polyurethane sandwich board partition wall, and this partition wall does not influence wall structure with slight collision, is easy to repair.

The utility model discloses a high-strength and high-toughness aluminum alloy section which comprises an aluminum alloy body, a reinforcing mechanism is arranged in the aluminum alloy body, a connecting mechanism is arranged on the outer surface of the aluminum alloy body, reinforcing grooves are formed in the upper surface of the aluminum alloy body at equal intervals, and the connecting mechanism is connected with the reinforcing grooves. Two sets of reinforcing holes are formed in the front face of the aluminum alloy body, the aluminum alloy body comprises a through groove, a fixing plate is fixedly connected to the interior of the through groove, connecting plates arranged at equal intervals are fixedly connected to the outer surface of the fixing plate, and symmetrical positioning strips are fixedly connected to the outer surface of each connecting plate. The side faces, close to each other, of each set of positioning strips are connected with the outer surface of the fixing plate. According to the device, the aluminum alloy body can be reinforced through the reinforcing grooves, the compressive strength of the aluminum alloy body is improved, the bearing strength of the aluminum alloy body can be improved through the reinforcing holes, and the toughness of the aluminum alloy body can be improved through cooperation of the reinforcing ribs and the toughness plates.

The invention relates to the field of civil engineering materials, and discloses a composition for a coating material, the coating material as well as a preparation method and application of the coating material. The composition for the tuff-based inorganic protective coating material comprises a cementing raw material, quartz sand, zinc silicate and an alkaline activator, relative to 100 parts by weight of the cementing raw material, the content of the quartz sand is 100-200 parts by weight, the content of the zinc silicate is 5-10 parts by weight, and the content of the alkaline activator is 40-70 parts by weight; the cementing raw material contains 10 to 50 weight percent of slag, 10 to 50 weight percent of metakaolin and 10 to 50 weight percent of tuff powder. The tuff-based inorganic protective coating material prepared on the basis of the composition has the characteristics of high strength, high cohesiveness and high corrosion resistance.

A water-reducing agent for coal-based solid waste concrete and its preparation method are disclosed. The water-reducing agent comprises 40-60 parts of a polycarboxylate-based main agent, 15-25 parts of a slump retainer, 10-20 parts of a crack-resistant reinforcing agent, 5-10 parts of a dispersing agent, 2-5 parts of a stabilizer, and 10-20 parts of deionized water. The slump retainer is a modified polyetheramine prepared by block copolymerization of ethylenediamine with ethylene oxide and propylene oxide; the crack-resistant reinforcing agent is a composite of nano-calcium carbonate and modified lignin sulfonate. This invention reduces the adsorption loss of the water-reducing agent by coal-based solid waste particles through the synergistic effect of the polycarboxylate-based main agent and the modified polyetheramine slump retainer, achieving a slump loss rate of ≤15% after 2 hours. The nano-calcium carbonate fills interfacial voids, and the modified lignin sulfonate alleviates hydration thermal stress, resulting in a lower 28-day drying shrinkage rate and higher crack resistance of the concrete. This invention solves the problems of poor adaptability, short slump retention time, and insufficient crack resistance of traditional water-reducing agents in high-volume coal-based solid waste concrete.