932 results about "Compressive resistance" patented technology

The invention relates to the field of geological exploration and geotechnical engineering, provides a rock mass dynamic mechanical parameter sensing method and system based on while-drilling parameters in order to dynamically obtain rock mass dynamic mechanical parameter characteristics in situ in real time in the drilling process, and provides a rock mass dynamic mechanical parameter sensing method and system based on while-drilling parameters by using multi-modal signals such as vibration, acoustic emission, torque and bit pressure through uniform characteristic engineering and multi-task learning. The instantaneous elastic modulus, the dynamic Poisson's ratio, the transient uniaxial compressive strength, the cohesive force and the internal friction angle can be synchronously and dynamically predicted in single drilling, and the limitation that only a single static parameter is estimated in a traditional method is broken through; a rock mass dynamic mechanical parameter acquisition model constructed on the basis of a multi-modal adaptive graph attention sequential network can effectively couple the physical proximity and the statistical association relationship of a sensor, and integrates expansion sequential convolution and a time perception Transform module, so that the characterization capability of emergencies (such as jamming / friction resistance) and long-term trends is considered on the premise of low time delay; therefore, the prediction accuracy is improved.

The invention discloses a high belite sulphoaluminate cement-based two-component grouting material and a preparation method thereof. The grouting material comprises a gelling component and a coagulating reinforcing component, wherein the gelling component is prepared from a high belite sulphoaluminate cement clinker and an additive A; the admixture A comprises a water reducing agent, a retarder and slow-release minerals; the coagulating and reinforcing component comprises ordinary Portland cement clinker, calcium hydroxide, gypsum and an additive B; the admixture B comprises a water reducing agent and an early strength agent. According to the high belite sulphoaluminate cement-based grouting material, the formula composition of the high belite sulphoaluminate cement-based grouting material is optimized, so that the hydration process of the high belite sulphoaluminate cement is more continuous and lasting, and the compressive strength of the obtained high belite sulphoaluminate cement-based grouting material can be continuously improved.

A toy ball includes an clastic shell that defines a receiving cavity and an actuation module mounted in the cavity. The actuation module is detachably connected to the clastic shell and provides driving force to roll and / or enhance bouncing. The clastic shell includes expanded thermoplastic polyurethane (E-TPU) to provide low weight, high rebound, and compressive resistance.

The invention relates to the technical field of building materials, and provides washing gangue concrete with high slump loss resistance and a mixing process thereof. The high-slump-retaining washed gangue concrete is prepared from the following raw materials in parts by weight: 200 to 220 parts of cement, 140 to 150 parts of mineral powder, 60 to 65 parts of fly ash, 680 to 720 parts of machine-made sand, 950 to 970 parts of washed gangue, 150 to 160 parts of water, 16 to 17.5 parts of a water reducing agent, 0.15 to 0.3 part of a slump retaining agent and 4 to 4.3 parts of polyethylene glycol. The slump retaining agent is hydroxypropyl methyl cellulose ether; and the viscosity of the hydroxypropyl methyl cellulose ether is 100 thousand mPa.s to 300 thousand mPa.s. According to the technical scheme, the problems of poor slump retaining performance and low compressive strength of washed gangue concrete in the prior art are solved.

The invention discloses an alkali-free accelerator and a preparation method and application thereof in the technical field of concrete additives, and the alkali-free accelerator provided by the invention comprises the following components in percentage by mass: 40%-50% of aluminum sulfate, 10%-15% of magnesium sulfate, 0.2%-0.6% of diethanol amine, 0.5%-1% of catechol-4-ammonium sulfonate, 5%-10% of a stabilizer and the balance of water. The stabilizer comprises silicate dispersion liquid and silica sol. The alkali-free accelerator provided by the invention can be used for spraying concrete, the mixing amount of the alkali-free accelerator is generally 4-6% of the mass of cement, the alkali-free accelerator is good in rapid setting effect and has excellent early and later compressive strength, and meanwhile, the alkali-free accelerator has relatively excellent stability.

The invention provides a reservoir mechanical integrity evaluation method under high-frequency injection and production. The evaluation method comprises the steps that S1, rock sample compressive strength and mechanical property parameters of a reservoir under multiple confining pressures are determined; s2, determining the upper limit and the lower limit of the reservoir pressure of the energy storage reservoir in the injection-production process; s3, obtaining the critical fatigue strength of the reservoir rock sample under a plurality of confining pressures within the designed age limit; s4, determining a deviating stress-average stress plane according to the compressive strength and the critical fatigue strength of the rock sample under the plurality of confining pressures, and dividing rock failure zones on the deviating stress-average stress plane; and S5, establishing a geomechanical model to predict the stress level of the reservoir, and judging the safety of the reservoir during the cyclic injection-production period from the perspective of mechanical integrity. Safe, efficient, economical and lasting operation of the energy storage warehouse is guaranteed, and a feasible method is provided for expanding the application range of compressed air energy storage.

The invention discloses a lightweight alumina foamed ceramic refractory material and a preparation method thereof, and relates to the technical field of ceramic materials. When the light aluminum oxide foamed ceramic refractory material is prepared, zirconium acetylacetonate, yttrium nitrate hexahydrate and aluminum nitrate nonahydrate are mixed to prepare a spinning solution for electrostatic spinning, nano aluminum titanate is loaded by using a nano spraying technology during spinning, and doped modified zirconium oxide fibers are prepared after high-temperature heat treatment and defibering and dispersing; mixing aluminum oxide micro powder, hollow aluminum oxide, a high-temperature foaming agent, doped modified zirconium oxide fibers and a sintering aid, and then performing ball milling and sieving to prepare aluminum oxide-based mixed powder; and carrying out mold pressing on the alumina-based mixed powder to prepare a green body, sintering, and cooling to prepare the lightweight alumina foamed ceramic refractory material. The light aluminum oxide foamed ceramic refractory material prepared by the invention has the advantages of light weight, low thermal conductivity, high compressive strength, high bending strength and good thermal shock resistance.

The invention provides a method for optimizing the proportion of industrial waste residues and a microbial composite curing agent, and belongs to the technical field of building materials.The method comprises the steps that the industrial waste residues are ground into superfine powder with the specific surface area of 350-450 m < 2 > / kg, meanwhile, bacillus is cultured at the temperature of 30-35 DEG C until the concentration of bacillus is 108-109 / mL, and a mixture is obtained; a pH meter and a dissolved oxygen meter are adopted to monitor the state of a microbial solution in real time, the aeration intensity and nutrient solution supplement are automatically adjusted according to critical value judgment, a composite curing agent is prepared according to the calculation proportion, the interface bonding strength and compressive strength are tested, and the curing effect is evaluated through a strength development equation and a durability prediction equation. According to the comprehensive performance indexes, the matching parameters are dynamically adjusted, the testing and adjusting process is repeated until the results are stabilized in the target performance interval for five continuous times, the final matching is determined, and the technical problem that the matching of the industrial waste residues and the microbial composite curing agent is difficult to accurately optimize is solved.

The present application relates to the field of door core material preparation, and particularly relates to a heat-insulating and fireproof door core material for security doors and a preparation method thereof, comprising a protective layer, a heat-insulating layer and a core part, wherein the core part comprises a plurality of springs arranged at equal intervals and fixed plates arranged at both ends of the springs; the heat-insulating layer is arranged outside the fixed plates; and the protective layer is bonded to the outside of the heat-insulating layer and is a foamed aluminum plate, which is prepared as follows: S1, cutting the fixed plates and then welding spring fixing bases and fixing buckles; S2, arranging and fixing the springs; S3, weighing the component materials of the heat-insulating layer, adding water and mixing uniformly; S4, based on a core material preparation system, sequentially completing pouring, jarring, smoothing and heat-insulating drying of the two heat-insulating layers after setting; S5, preliminarily determining whether the preparation of the heat-insulating layer meets preset standards according to the measured compressive strength; and S6, bonding the protective layer. On the basis of ensuring the performance of the core material, the present application can also be applied to the door core of security doors with different thicknesses.

The invention belongs to the technical field of solid waste recycling and controllable low-strength material production, and particularly discloses a method for preparing a controllable low-strength material from lithium slag and shield muck. The controllable low-strength material with the fluidity larger than 170 mm and the 28d unconfined compressive strength of 0.3-8 MPa is successfully developed by taking the lithium slag instead of traditional cement as a cementing material, taking the shield muck as a fine aggregate and taking the quicklime as an alkaline activator and adding a polycarboxylic acid type high-efficiency water reducing agent to adjust the fluidity through reasonable proportioning, and the controllable low-strength material with the fluidity larger than 170 mm and the 28d unconfined compressive strength of 0.3-8 MPa is prepared. Under the condition that vibration is not needed, narrow construction areas can be automatically filled, and most backfill projects are met. The cement-free cementing material developed by exciting the lithium slag through the alkaline exciting agent can replace cement, the material cost is effectively reduced, on the other hand, a large amount of lithium slag and shield muck are secondarily utilized, solid waste recycling is promoted, environmental pollution is reduced, and high economic benefits and environmental benefits are achieved.

The invention provides a lithium slag-based cementing material and a preparation method thereof. The lithium slag-based cementing material comprises lithium slag, cement, sand and water, and the lithium slag is adopted to replace part of cement to obtain the lithium slag-based cementing material; according to the invention, resource utilization of the lithium slag is realized, and the problems of stockpiling pollution and low comprehensive utilization rate of the lithium slag are solved; furthermore, when the mesh number of the lithium slag is 200-300, the lithium slag-based cementing material has relatively high compressive strength; according to the lithium slag-based cementing material, the highest strength of a single physically activated LS-Cem2 cementing material reaches 39.65 Mpa, the optimal particle size range of the lithium slag is 200-300 meshes, the comprehensive efficiency and cost are high, and the optimal tank milling time is 50 min; the optimal water glass modulus of the LS-Cem1 cementing material and the optimal water glass modulus of the LS-Cem2 cementing material are 1.25 and 0.25 respectively; compared with Cem1, Cem2 is more suitable as a cement admixture.

The utility model discloses a water-cooling radiator core with a reinforcing structure, which belongs to the technical field of radiators, and comprises a plurality of radiating components arranged side by side, each radiating component comprises a radiating tube and a reinforcing plate, each radiating tube comprises two symmetrically arranged side plates and two semicircular plates, each reinforcing plate comprises a middle plate and two side supporting plates, and each side supporting plate is arranged between the middle plate and the corresponding semicircular plate. The middle plate is attached to the inner wall of one of the two side plates, the side supporting plate comprises a first arc-shaped plate and a first short plate, and the first short plate is attached to the inner wall of the side plate under the elastic effect of the first arc-shaped plate. The front face and the back face of the radiating pipe can be supported, the two ends of the radiating pipe can also be supported, and the compressive strength of the radiating pipe is improved; the heat exchange effect of the radiating pipe is improved; the reinforcing plate is integrally formed, the manufacturing and forming process is simpler, the reinforcing plate can be conveniently placed in the radiating pipe, the reinforcing plate is stabilized in the radiating pipe through the elasticity of the side supporting plate, welding points are few, sliding is avoided, and the supporting effect is more stable.

The utility model discloses a testing device for detecting pressure resistance of a food packaging box, which comprises a base, a mounting plate, a movable plate and a pressing plate are sequentially arranged at the top of the base from top to bottom, a pressure sensor is fixedly connected between the movable plate and the pressing plate, and a laser range finder is fixedly connected to one side, close to the edge, of the bottom of the pressing plate. A U-shaped fixing frame is fixedly connected to the top of the base, a cylinder is fixedly connected to the top of the fixing frame, and the bottom end of a cylinder piston rod is fixedly connected with the top of the mounting plate. And four springs are uniformly and fixedly connected between the mounting plate and the movable plate. According to the structure, the pressure sensor, the laser range finder, the spring and other components are arranged, the compression resistance of the food packaging box can be efficiently and accurately evaluated, a scientific basis is provided for packaging design and logistics optimization, meanwhile, the temperature and humidity sensor is arranged to detect the overall temperature and humidity in the packaging box, and the detection accuracy is improved. It is ensured that the test environment meets the preset conditions, and test errors caused by environmental factors are reduced.

The invention relates to porous ceramic for a high-air-permeability semiconductor device as well as a preparation method and application of the porous ceramic, raw materials comprise 35-55 wt% of alumina powder and 10-55 wt% of a polymer microsphere pore-forming agent, and the polymer microsphere pore-forming agent comprises one or more of agarose, polylactic acid, polyacrylamide and organic silicon resin. The porous ceramic for the high-air-permeability semiconductor device, which is obtained by the preparation method provided by the invention, has relatively high porosity and air permeability, and also has relatively high mechanical strength and dielectric strength. According to the present invention, the gas volume flow rate is applied to the internal pore size characterization, and the high porosity and the high gas permeability can be achieved by accurately measuring the gas flow transmittance, accurately characterizing the pore size and the opening degree in the porous ceramic, and adjusting the particle size and the addition amount of the polymer microsphere pore forming agent; through the preparation process, the porosity and mechanical strength of the porous ceramic for the high-air-permeability semiconductor device can be balanced, meanwhile, high air permeability and high compressive strength are obtained, and the porous ceramic is particularly suitable for electrostatic chucks of different manufacture procedures.

The invention discloses a preparation method of a high-strength glass insulator, and belongs to the technical field of electrical equipment materials, and the preparation method comprises the following steps: S1, preparing a glass matrix material: mixing 65-75% by weight of SiO2, 10-25% by weight of Al2O3, 5-8% by weight of B2O3, 3-5% by weight of CaO, 1-3% by weight of Na2O and 1-2% by weight of MgO, and melting to form molten glass; and S2, gradient heat treatment: injecting the molten glass into a mold for molding, and sequentially carrying out treatment in three stages of annealing at the high temperature of 650-700 DEG C, slow cooling at the medium temperature of 400-450 DEG C and stabilizing at the low temperature of 200-250 DEG C. The compressive strength is greater than or equal to 500 MPa, and the insulation resistance is greater than or equal to 1000 G omega.cm.

The invention belongs to the technical field of concrete, and particularly relates to carbon dioxide foam concrete as well as a preparation method and application thereof. Comprising the following steps: obtaining a gel raw material comprising cement, a nano filler and a mineral admixture, and preparing the gel raw material into cement paste; the preparation method comprises the following steps: preparing a foaming solution from a hydrogel thickener, a water repellent agent, a foaming agent and water, and introducing gas containing carbon dioxide to prepare carbon dioxide foam; carbon dioxide foam and cement paste are mixed to prepare mixed paste, and the mixed paste is formed to obtain a formed concrete blank; and performing internal carbonization curing and external carbonization curing on the concrete green body, and performing natural curing to obtain the carbon dioxide foam concrete. Through internal and external carbonization maintenance, a large amount of carbon sequestration is realized, micropores are filled by virtue of a product generated by carbonization, the aperture is refined, the collapse of a foam structure is reduced, the foam concrete is enhanced, the compressive strength and durability of the carbon dioxide foam concrete are improved, and the durability of the carbon dioxide foam concrete can be enhanced.

The invention relates to the technical field of aerogel materials, in particular to a carbon-rich SiC-coated Si3N4 double-network aerogel and a preparation method thereof. The double-network aerogel comprises an inner framework and an outer framework, the inner framework is a SiC network, the outer framework is a Si3N4 network, the double-network aerogel is formed by interweaving the SiC network and the Si3N4 network, the SiC network and the Si3N4 network are rich in in-situ carbon, and the content of the in-situ carbon in the Si3N4 network is far smaller than that of the in-situ carbon in the SiC network. The aerogel disclosed by the invention successfully integrates multiple key properties, wherein high porosity and low thermal conductivity ensure excellent thermal insulation capability; the reflection loss reaches-60dB to the minimum, and the effective absorption bandwidth reaches 5GHz, so that the excellent broadband wave-absorbing performance is proved; the compressive strength of the material can reach 14 MPa or above, excellent mechanical reliability is shown, and an ideal solution is provided for electromagnetic protection and thermal management of high-end equipment.

The invention discloses a long-acting stable filling agent for phosphorite mining and a preparation method and application thereof, the long-acting stable filling agent takes cement, slag powder, phosphogypsum and fly ash as matrix components, and is supplemented with additives such as a nano modified liquid, a retarder and an early strength agent. The 3d compressive strength reaches 4.6-5.5 MPa, the 28d compressive strength reaches 13.5-15.5 MPa, the 90d strength retention rate in a simulated acid environment is larger than or equal to 84%, the volume shrinkage rate is smaller than or equal to 0.5%, and the early strength and the excellent long-term acid-resistant stability are both high. Through a synergistic effect of a nano-micron composite structure, pores are filled with nano particles and secondary hydration is promoted, basalt fibers are bridged to resist cracking, and nano montmorillonite blocks acid etching, so that unification of high early strength and long-acting acid resistance is realized. The material is simple and convenient in preparation process, can be efficiently used for mining and filling of phosphorite mountains, and meets the requirements of rapid support and long-term acid medium erosion resistance.

The invention discloses a light internal partition wall board and a preparation process thereof, and belongs to the technical field of building materials. The light internal partition wall board is prepared from the following main raw material components in parts by mass: 500 to 700 parts of slag washed sand, 1400 to 1600 parts of cement, 40 to 50 parts of flame-retardant light filler, 10 to 24 parts of flame retardant, 15 to 60 parts of air entraining agent, 8 to 24 parts of water reducing agent and 330 to 750 parts of water. Wherein the flame-retardant light filler is obtained by sequentially reacting expanded polystyrene particles with bis (pinacolato) diboron, 4-bromo-3-isopropyl benzoic acid and triisopropyl phenyl phosphate; the water reducing agent is prepared from polyvinyl alcohol; the prepared light internal partition wall board is high in compressive strength, good in fire resistance and light in mass.

The invention relates to the technical field of asphalt concrete detection, in particular to an asphalt concrete strength detection device which comprises a press machine, an upper pressing plate and a lower placing table, the protective cover is movably arranged in a base of the press machine; the gas injection mechanism is linked with the protective cover and is driven by the upward movement of the protective cover; the annular air bag is arranged on the periphery of the lower placement table and communicated with the air injection mechanism, automatic centering of the concrete sample is achieved through radial pushing of the annular air bag, and the problem that it is difficult to guarantee that the sample and the pressing plate are strictly coaxial through traditional manual placement is solved; the air bag is completely deflated and shrunk before being pressurized and is separated from the side wall of the sample, so that the interference of lateral supporting force on a detection result is thoroughly eliminated, the phenomenon that the strength value is virtually high due to constraint stress is avoided, and the accuracy and repeatability of the compressive strength test are effectively improved.

The invention discloses a well cementation cement slurry system suitable for a high-CO2-content acidic oil and gas field and a preparation method of the well cementation cement slurry system, and relates to the technical field of well cementation materials for oil and gas field development. The well cementation cement slurry system comprises the following components in percentage by weight: 56-75 wt% of G-grade oil well cement, 15-25 wt% of a hydration-corrosion-resistant reinforcing material, 5-8 wt% of a composite corrosion-resistant admixture, 3-5 wt% of an anti-cracking tough material, 0.5-1 wt% of a dispersing agent, 1-3 wt% of a fluid loss agent and 0.5-2 wt% of a retarder, the hydration-corrosion-resistant reinforcing material is formed by mixing micro-silicon, red mud and a nano magnesium phosphate gelling agent according to the mass ratio of 8: 12: 1. The invention also discloses a preparation method of the well cementation cement slurry system. The well cementation cement slurry system has the characteristics of high toughness, high compressive strength, low permeability, good engineering performance, excellent corrosion resistance and the like.

The utility model discloses an energy-saving drying device for coal gangue brick preparation, which belongs to the technical field of coal gangue brick preparation and comprises a drying box body, a plurality of first limiting plates are symmetrically and fixedly mounted on two sides in the drying box body, and a placing component for energy-saving preparation of coal gangue bricks is arranged in each first limiting plate. The coal gangue brick drying device has the beneficial effects that by arranging the multiple containing grooves, coal gangue bricks cannot be stacked together, it is ensured that the coal gangue bricks can be kept stable in the drying process through a fixing plate, it can be ensured that the coal gangue bricks can make full contact with hot air through honeycomb holes, and the drying efficiency is improved. The method has the advantages that the moisture content of the brick body can be effectively reduced through sufficient drying, so that the compressive strength and durability of the brick are improved, the stability of the brick in the use process is ensured, the brick is sintered after sufficient drying, the energy consumption required in the sintering process can be reduced, and the overall production efficiency is improved.

The invention discloses a modified polymer cement-based normal-temperature foaming fireproof coating and a preparation method thereof, and relates to the technical field of fireproof coatings. The modified polymer cement-based normal-temperature foaming fireproof coating comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 15 to 20 parts of cement, 10 to 12 parts of calcium carbonate, 0.3 to 0.9 part of nano titanium dioxide, 30 to 35 parts of polyurethane emulsion, 1 to 2 parts of cross-linking agent, 8 to 12 parts of flame retardant, 1 to 3 parts of foaming agent, 0.5 to 1.5 parts of dispersing agent and 10 to 20 parts of deionized water; the component B comprises the following raw materials in parts by weight: 20-25 parts of a curing agent, 0.1-0.5 part of an organic zinc catalyst and 0.5-1.2 parts of a foam stabilizer; the prepared modified polymer cement-based normal-temperature foaming fireproof coating has excellent fireproof performance, bonding strength and compressive strength.

The heat exchanger is applied to the field of water purifiers, the heat exchanger comprises an inner pipe and an outer pipe, the inner diameter of the outer pipe is larger than the outer diameter of the inner pipe, the outer pipe is arranged outside the inner pipe in a sleeved mode, a plurality of supporting pieces are arranged between the outer pipe and the inner pipe in the circumferential direction, and one ends of the supporting pieces are connected with the outer wall of the inner pipe. And the other end is connected with the inner wall of the outer pipe so that the inner pipe and the outer pipe are coaxial. The water purifier comprises the heat exchanger. The inner diameter of the outer pipe is larger than the outer diameter of the inner pipe, so that the outer pipe is sleeved outside the inner pipe, the two ends of the supporting piece are connected with the outer wall of the inner pipe and the inner wall of the outer pipe respectively, and therefore the inner pipe is supported and erected in the outer pipe, the axis of the inner pipe coincides with the axis of the outer pipe, and the effect that the inner pipe and the outer pipe are coaxial is achieved. The heat exchanger adopting the structure is high in coaxiality and high in compressive strength, the uniformity of the heat exchange process of the heat exchanger can be improved, and the phenomena that the water temperature changes violently and the temperature is suddenly high and suddenly low are prevented.

The utility model relates to the technical field of sports equipment, and provides a soft kettle bell which comprises a PU shell, a through hole, a base, a handle and a protection assembly, the PU shell is provided with the through hole, the through hole is rotatably connected with a matched connecting cover, the handle is connected to the PU shell, the base is arranged at the bottom of the PU shell, and the outer surface of the PU shell is wrapped with the protection assembly; the protection assembly comprises fiber gridding cloth, anti-collision cotton and microfiber leather, one side of the fiber gridding cloth is bonded on the PU shell, the other side of the fiber gridding cloth is bonded with the anti-collision cotton, and the microfiber leather is bonded on the anti-collision cotton. According to the integrated lifting handle, the stability and firmness of the overall structure are effectively enhanced, and the overall service life is prolonged; the detachable handle can be quickly replaced and is convenient and practical; the gripping comfort can be effectively improved by matching with an anti-skid pad; the stability of the whole structure is enhanced through the base, placement is convenient, and rolling is prevented; the pressure resistance, wear resistance and flexibility of the structure are achieved through the protection assembly, and the service life is prolonged.

The invention discloses a high-porosity low-thermal-conductivity cement aerogel plate and a preparation method thereof, and belongs to the technical field of preparation of aerogel materials. The method comprises the following steps: preparing nano water-saturated resin from sodium polyacrylate alkali-resistant water-absorbent resin, mixing the nano water-saturated resin with cement, silica fume and other raw materials, and performing strickling or spray layering molding and microwave heating curing to obtain a finished product. Through the synergistic effect of the nanometer sacrificial template and microwave curing, the porosity of the product is larger than or equal to 96%, the heat conductivity coefficient is smaller than or equal to 0.026 W / (m.K), the compressive strength is larger than or equal to 0.8 MPa, the problems that in the prior art, the porosity is insufficient, the heat conductivity coefficient is high, the period is long, and performance is difficult to consider are solved, the process is simple and controllable, and the method is suitable for large-scale application of building heat preservation.

The invention discloses ceramic filler powder and a preparation method of porous ceramic, and relates to the technical field of ceramic. According to the invention, the raw material components are reasonably proportioned, and the superfine SiC-coated MgAl-LDH compound is used as an additive to be mixed with kaolin, potassium feldspar, quartz, aluminum oxide, silicon carbide and talc to prepare the ceramic filler powder. On the basis, the prepared ceramic filler powder is mixed with carboxymethyl cellulose, polyvinyl alcohol, water glass, magnesium stearate and water, then the mixture is subjected to filter pressing, vacuum pugging and aging, and then the porous ceramic is prepared through a forming process and a sintering process. The porous ceramic prepared from the ceramic filler powder provided by the invention has better compressive strength and corrosion resistance, is beneficial to expanding the application field of products, and particularly meets the requirements of high-end industries.

The invention relates to the technical field of concrete admixtures, and discloses a composite admixture for reducing the springback rate of sprayed concrete and a preparation method of the composite admixture. The composite admixture comprises modified coconut fiber, silica fume, fluffy ash, a dispersing agent, cellulose ether, a polycarboxylate superplasticizer and an early strength agent, wherein relative to 100 parts by weight of the modified coconut fiber, the content of the silica fume is 75 to 85 parts by weight, the content of the fluffy ash is 35 to 45 parts by weight, the content of the dispersing agent is 6 to 10 parts by weight, the content of the cellulose ether is 5 to 9 parts by weight, the content of the polycarboxylic acid water reducing agent is 0.1 to 0.5 part by weight, and the content of the early strength agent is 0.03 to 0.07 part by weight; wherein the modified coconut fiber is a product obtained by modifying coconut fiber with rich hydroxyl groups on the surface by using a silane coupling agent. The composite admixture provided by the invention can effectively reduce the rebound rate of sprayed concrete, and maintains the compressive strength and durability of the concrete at the same time.

The invention belongs to the technical field of building materials, and particularly relates to fan blade regenerated fiber-based high-solid-waste low-carbon concrete and a preparation method thereof, and the fan blade regenerated fiber-based high-solid-waste low-carbon concrete comprises the following raw materials by weight: 0.9-1.1 parts of an alkali-activated active precursor; 0.4 to 0.8 part of iron tailing sand; 0 to 1.1 parts of natural sand; 1.9 to 2.4 parts of recycled aggregate; 0.15 to 0.20 part of a composite alkali activator; 0.015 to 0.020 part of fan blade regenerated glass fiber; 0.001 to 0.003 part of a retarder; 0.35 to 0.45 part of water; wherein the alkali-activated active precursor is granulated blast furnace slag powder. The obtained concrete mixture is good in workability, the 28-day compressive strength reaches 40 MPa or above, the drying shrinkage rate is reduced by 30%-50% compared with that of traditional alkali-activated concrete, additional curing measures are not needed, the concrete mixture is particularly suitable for prefabricated parts such as curbs, sleepers and manhole covers, and a feasible technical path is provided for high-valued and large-scale utilization of bulk industrial solid waste.

The utility model provides compression resistance detection equipment for camera processing, which relates to the technical field of compression resistance detection equipment and comprises a base, a U-shaped frame is fixed at the top of the base, a supporting plate is arranged on the inner bottom surface of the U-shaped frame, a contact block is fixed at the bottom of the supporting plate, an adjusting groove is formed in the inner bottom surface of the U-shaped frame, and the adjusting groove is connected with the U-shaped frame. According to the utility model, a camera shell of which the compressive resistance needs to be detected is placed on the supporting plate, then the movable plate can be driven to slide downwards by rotating the screw rod, and then the pressing spring is pressed, so that the compression resistance of the camera shell can be detected, and the compression resistance of the camera shell can be detected. The elastic pressure generated by the pressing spring acts on the connecting plate, the connecting plate drives the pressing plate to press the camera shell, when the movable plate slides to the bottom of the penetrating opening, the pressing force on the camera shell reaches the maximum, and when the camera shell is not damaged, it is indicated that the camera shell is a qualified product.