41 results about "Large aggregate" patented technology

The invention relates to a graphene oxide modified cement-based grouting material as well as a preparation method and application thereof. The graphene oxide modified cement-based grouting material is prepared from cement, graphene oxide, silica fume, a polycarboxylate superplasticizer, an accelerator and water. The invention also provides a preparation method of the graphene oxide modified cement-based grouting material, which comprises the following steps: adding GO into an aqueous solution containing a polycarboxylic acid water reducer, stirring and then carrying out ultrasonic treatment to form a GO suspension; premixing silica fume and cement to obtain a dry mixture; and adding the GO suspension into the dry mixture, mixing and stirring, and then doping an accelerator to obtain the graphene oxide modified cement-based grouting material. The invention further provides application of the graphene oxide modified cement-based grouting material as a reinforcement treatment material for loose accumulation bodies and broken rock stratums. The GO modified grouting material solves the problem that the performance of a cement-based material is affected due to the fact that GO is not uniformly dispersed and larger aggregates are easily formed in the existing GO modified grouting material.

The utility model provides a detachable large aggregate screening device. The detachable large aggregate screening device comprises a supporting frame body, a support, a supporting rod, a screening net and an aggregate collecting base. Wherein the supporting rod comprises a short supporting rod and a long supporting rod; the supports are welded to the four corners of the supporting frame body respectively, and the supports are provided with inserting holes matched with the supporting rods. The long supporting rods are respectively inserted into the left upper support and the right upper support; the short supporting rods are respectively inserted into the supports at the left lower part and the right lower part; the supporting frame body is obliquely supported on the ground through the supporting rods; the screening net is fixedly mounted on the surface of the supporting frame body; and the aggregate collecting base is placed below the supporting frame body. According to the detachable large aggregate screening device, aggregate screening can be easily and conveniently achieved, the design of a detachable structure, a split structure and the like is adopted, installation and transportation are convenient, and the detachable large aggregate screening device has important engineering application value.

The present application provides a loose evaluation method for asphalt pavement, and belongs to the technical field of loose evaluation for asphalt pavement. The aggregate cleaning device is used to sweep and collect loose aggregate of the asphalt pavement in a specific area. The collected aggregate is conveyed to a vibration table for vibration and shaking. A laser array is used for scanning to obtain the particle size of all aggregates. The particle sizes of all aggregates are compared to obtain the particle size of the largest aggregate. Then, the identification range size is selected according to the particle size of the largest aggregate. The laser imaging principle is used to irradiate and identify the asphalt pavement from the top of the pavement to obtain each spalling pit hole in the test area. The loose rate of the asphalt pavement is calculated according to the size of the aggregate and the spalling pit hole. Then, the loose degree of the asphalt pavement is evaluated according to the loose rate. The scattered aggregate is collected for detection and grouping. The particle size of the aggregate is used as the reference value of the measurement range to realize more accurate measurement of the spalling pit hole area. The whole measurement process does not involve cutting the pavement or digging, which well protects the road.

The invention discloses an anti-rut and anti-stripping recycled asphalt mixed material. The material is mainly prepared from a treated RAP asphalt aggregate mixture and a new asphalt binder. Furthermore, the content of RAP in the RAP asphalt aggregate mixture is 25%-30%, and the effective utilization rate of the new asphalt binder is 75%. The method comprises the following steps: dividing an RAP asphalt aggregate mixture into aggregate with the maximum particle size of 25mm, heating the RAP and a new asphalt binder to obtain the viscosity of the coated aggregate, mixing until the aggregate is uniformly coated, continuously heating and compacting the mixture, repeatedly compacting 6 batches of recycled asphalt mixture with the compaction height of 150mm, and curing for 24 hours. The asphalt mixture designed by adopting a large aggregate size is better than a mixture with a small particle size in anti-rutting and anti-stripping performances.

The application provides a method for increasing the proportion of large-diameter soil aggregates based on straw utilization, and relates to the tobacco planting technical field.The method comprises the following steps: S1: crushing field straw and stubble by using a crusher to obtain crushed materials; S2: mixing the crushed materials with organic fertilizer and water, and centrally stacking on the surface of soil to pre-ferment to obtain mixed materials, then spraying bacteria liquid 1, covering a film, and carrying out aerobic fermentation to obtain fermented materials; S3: removing the film, uniformly spreading the fermented materials, spraying bacteria liquid 2, using a powder ridge deep plough to plough, and carrying out water irrigation treatment to carry out anaerobic fermentation.The method has a greater influence on the powder clay aggregates and the medium aggregates in the plough layer soil, and has a smaller influence on the large aggregates; for the plough bottom layer soil, the method reduces the proportion of the powder clay aggregates, realizes the expansion of the small-diameter aggregates, improves the proportion of the medium and large aggregates, and is beneficial to expanding the depth of the plough layer.

The present application relates to the technical field of mine aggregate mining equipment, in particular to a mine aggregate conveying system braking reinforcement structure, comprising a support, a belt conveyor, a braking reinforcement device and a rockfall prevention device, which solves the problem that the existing mine aggregate conveying system mostly adopts belt conveyor inclined conveying, when braking occurs, the large aggregate on the belt conveyor will slide (roll) downward due to the action of braking inertia and its own gravity, not only driving other aggregate to roll (slide) downward to the outside of the belt conveyor, but also possibly falling into the inside of the belt conveyor, causing the phenomenon of jamming, reducing the conveying output of the aggregate, and additionally, the problem of needing to add artificial cleaning of the jammed aggregate, in addition, the problem of the aggregate falling downward to the outside of the belt conveyor possibly injuring the construction personnel passing below the belt conveyor, thereby causing unnecessary personal and economic losses is solved.

This invention provides a method for constructing a chloride ion diffusion coefficient model for concrete, comprising the following steps: S1, obtaining the concrete mix proportion and the chloride ion diffusion coefficient of the concrete mortar made from the mix proportion; S2, based on the mix proportion, constructing a two-dimensional three-phase geometric model of the concrete using finite element software; S3, establishing a chloride ion diffusion coefficient model based on the constructed two-dimensional three-phase geometric model. This invention considers the influence of large aggregate distribution, enabling more accurate simulation of concrete erosion and providing reliable technical support for the durability of large-size aggregate concrete projects.

The application discloses a kind of efficient mixed delivery generation method and system of concrete three-dimensional mesoscopic model, it is related to mechanics and composite material numerical simulation technical field, including: determining aggregate gradation and carrying out interval discretization processing;Establish polyhedral aggregate geometric template library;Based on in-situ generation strategy, construct large aggregate skeleton;Based on global random sequence adsorption strategy, delivery medium aggregate;And based on space grid index mechanism, accelerate the delivery of small aggregate.The application uses the above-mentioned efficient mixed delivery generation method and system of concrete three-dimensional mesoscopic model, for the delivery of huge number of small aggregate, innovatively introduces background space grid index algorithm, the global collision detection complexity of traditional random sequence adsorption algorithm in the number of aggregate is exponentially increased O ( N 2 ), optimization is only needed in constant level detection O ( C ) in local neighborhood, so as to break the computing power bottleneck of high volume fraction mesoscopic model construction, realize the efficient delivery of mass aggregate.

The invention relates to the technical field of curing agents, in particular to a soil curing agent and a preparation method thereof.The soil curing agent is prepared from, by weight, 180-220 parts of fly ash, 160-180 parts of slag, 80-120 parts of calcium salt, 80-120 parts of potassium nitrate, 10-14 parts of microbial agents, 40-60 parts of sustained-release capsule particles and 20-30 parts of biological stimulants. Therefore, the soil structure is improved, and the content of large aggregates in the soil can be remarkably increased.

This invention belongs to the field of agricultural microbial applications, specifically a multifunctional bacterium W1. It can induce the formation of a cementitious substance by hydrolyzing urea and amino acids to produce alkali, and simultaneously secretes extracellular polysaccharides and the plant growth-promoting substance indoleacetic acid. Furthermore, it exhibits a synergistic effect with hydrothermal charcoal. It was deposited on October 12, 2024, at the China General Microbiological Culture Collection Center, and the proposed classification name is *Defective Shortwave Monoclonal*. Brevundimonas diminuta The study, numbered CGMCC No.32186, used Bacterium W1, hydrothermal charcoal, inorganic nitrogen fertilizer, human and animal manure, and calcium source as soil conditioners for sandy soil and verified them by planting maize. It showed that the conditioners could promote the cementation of soil particles in sandy soil, increase the number of mechanical and water-stable large aggregates, increase the organic matter content of sandy soil, enhance the water and fertilizer retention capacity of sandy soil, enhance the drought resistance and nutrient absorption capacity of maize, and thus increase maize yield.

The invention relates to the technical field of coal washing, and discloses a dense medium flotation dual-system coupled fine coal slime high-recovery-rate coal washing device which comprises a flotation box, a collecting mechanism and a dispersing mechanism and further comprises two sets of flotation mechanisms fixedly installed on the two sides of the top of the flotation box and a driving mechanism rotationally installed on the top of the flotation box. The dispersing mechanism is composed of a dispersing hopper, a channel, a spiral plate and a coaxial forward and reverse rotating dispersing assembly; according to the technical scheme, bidirectional shearing force is applied to coal slime through forward and reverse rotating dispersing paddles in the rotating coaxial forward and reverse rotating dispersing assembly, large aggregates are crushed into fine particles, the surface area of coal particles is increased, and agent adsorption and bubble attachment are promoted; in the process, the rotating coaxial forward and reverse rotation dispersing assemblies form a three-dimensional turbulent flow field in the suspension liquid, so that coal particles and bubbles are fully mixed, the layering phenomenon is eliminated, it is ensured that all particles have opportunities to participate in flotation, the dispersing efficiency and air flotation selectivity of fine-particle coal slime are remarkably improved, and the concentrate quality is optimized.

This application discloses a fiber-reinforced aggregate mixing device for marine concrete, belonging to the technical field of concrete production equipment. It includes a mixing chamber with a stirring shaft inside. Several stirring blades are fixedly connected to the outer wall of the stirring shaft. Small particles are directly fed into the mixing chamber through the inlet. Large aggregates are first ground and crushed by an aggregate grinding unit before being added to the mixing chamber, making it easier for the aggregates to mix with other materials. A stirring motor drives a transmission rod to rotate. A lifting sleeve fitted onto the outer wall of the transmission rod, through a sliding fit between a protrusion and an annular groove, can rotate synchronously with the transmission rod and slide up and down along the annular groove. The bottom of the lifting sleeve is fixedly connected to the stirring shaft. Therefore, the stirring shaft and stirring blades can simultaneously complete rotational mixing and axial lifting movements, covering areas of different heights within the mixing chamber, breaking up material stratification, and ensuring uniform mixing, thus improving mixing efficiency.

The application discloses a small sample-based concrete porosity gradient distribution measurement method based on nuclear magnetic resonance, realizes nondestructive measurement of the spatial gradient distribution of the porosity of a large aggregate concrete body, and solves the technical bottleneck that traditional nuclear magnetic resonance technology cannot obtain the continuous variation information of the porosity of the large aggregate concrete from the surface to the inside under the limitation of the size of the cavity of the equipment by establishing a mathematical mapping relationship between a small-size test block and the body porosity distribution. The method innovatively introduces statistical sampling theory and spatial weighted analysis into the field of concrete nondestructive testing, and realizes accurate reconstruction of the porosity gradient distribution of a large concrete body by using a small sample.

The invention discloses an asphaltene dispersant and a preparation method thereof, and belongs to the technical field of petrochemical industry. A plurality of ester polar functional groups exist in the asphaltene dispersant provided by the invention, so that asphaltene can be easily combined through intermolecular forces such as hydrogen bonds, and meanwhile, nitrogen atoms in the center of the asphaltene dispersant have a pair of lone pair electrons which can be used as acceptors of the hydrogen bonds to form the hydrogen bonds with hydrogen atoms in asphaltene molecules, so that the asphaltene dispersants are formed. Therefore, the adsorption force of the asphaltene lamellar structure is weakened; moreover, the long alkyl side chain can play a supporting role among asphaltenes, so that the asphaltenes are further prevented from being gathered, and large aggregates are not easy to form among the asphaltenes. Due to the characteristics, the addition amount of the asphaltene dispersant in the crude oil is less than or equal to 0.05%, and the addition amount is small, so that the preparation cost can be reduced. In addition, the addition amount is small, so that the influence of the addition of the asphaltene dispersant on the performance of the crude oil can be reduced.

The application provides a soil improvement method and a corn seeding method based on the vertical tillage principle, wherein straw is crushed, all the straw is returned to the field and uniformly scattered on the ground surface; combined soil preparation is carried out, and deep scarification and harrowing are sequentially carried out, the deep scarification depth reaches the plough pan, and the harrowing operation rakes part of the straw into the soil; two vertical tillage operations are carried out, part of the straw is mixed into the soil after the operation, and part of the straw is left to cover the ground surface. The soil water holding capacity can be significantly improved, the formation of large aggregates is promoted, the soil penetration resistance is reduced, the soil compaction is reduced, and the soil water erosion is reduced; and the corn seeding method provided by the application can promote the growth of the above-ground part and the root system of crops and significantly improve the crop yield.

The utility model discloses a scattering device for graphene preparation, and relates to the technical field of pay-off, the scattering device comprises a crushing box, a crushing mechanism is arranged in the crushing box, a high-speed dispersing mechanism is arranged in a dispersing box, and the output end of a second motor is connected with a rotating shaft. Through the arrangement of the crushing mechanism and the high-speed dispersion mechanism, the crushing mechanism primarily crushes and disperses graphene raw materials through mechanical force, mainly aims at large aggregates and particles, the high-speed dispersion mechanism serves as a second defense line, and the leaked fishes are dispersed again through high shear force and impact force, so that the large aggregates and particles are dispersed again. All agglomerated graphene raw materials can be thoroughly dispersed, the dispersion effect of the graphene is remarkably improved through a dual dispersion mechanism, the particle size distribution of graphene particles is more uniform through the continuous action of preliminary dispersion and fine dispersion, the agglomeration phenomenon is effectively restrained, and the product quality is improved. Therefore, the dispersity and the reinforcing effect of the graphene in the composite material are improved.

The utility model discloses a hot aggregate elevator for an asphalt concrete mixing plant, which relates to the technical field of elevators and comprises a base, an aggregate tray and a stabilizing block, a screening net is arranged at the top of the stabilizing block, a discharge port is arranged at the bottom of the aggregate tray, a triangular inclined block is arranged at the bottom of the aggregate tray, and a concentration box is mounted at the bottom of the aggregate tray. A sliding rail is installed on the inner wall of the concentration box, a sliding plate is movably installed on the inner wall of the sliding rail, and a concentration frame is arranged on the outer wall of the sliding plate. The screening mechanism is installed, the triangular inclined block is moved to the position below the stabilizing block, the screening net is placed above the stabilizing block, large aggregate is screened above the screening net through the screening net in the aggregate adding process, after screening is completed, the aggregate enters the centralizing frame to be collected, the centralizing frame is pulled, and then the aggregate is collected. And then, the centralizing frame is lifted to enable the fixing blocks to move from the fixing grooves, the centralizing frame is moved out of the centralizing box, and feeding of the equipment is facilitated.

The invention provides an underground roadway flowing water recoverable plugging method based on a grading magnetic control framework. The underground roadway flowing water recoverable plugging method comprises the steps that a drill hole group is drilled according to roadway space parameters, and an orifice pipe is installed; trial-casting standard aggregate to evaluate the dynamic characteristics of water flow, and determining the amount of electromagnets; a disc-shaped electromagnet is put from the most downstream drill hole, and is electrified and stacked to the roadway height to form an anti-impact base; drilling holes from downstream to upstream in sequence, putting large aggregates to construct a framework, filling pores with small aggregates, forming a grading magnetic control water filtering framework, and remarkably attenuating the water flow speed; specially-made magnetic slurry is injected into the most upstream drill hole, and an electromagnet adsorbs the slurry to be enriched on an aggregate interface to form a reinforced impervious layer; and demagnetizing after grouting solidification, and mechanically recovering the electromagnet. The method has the advantages that the problem of flowing water erosion is solved through graded framework stepped energy dissipation, and effective retention of grouting is guaranteed; the unification of barrier construction and lossless recovery is realized through electromagnet power-on and power-off double-state switching; and the anti-permeability stability of the plugging body is improved by a magnetic control slurry interface enrichment technology.

The invention relates to the technical field of bulk material loading, and discloses an aggregate loading device with a movable and liftable discharge port, the aggregate loading device comprises a main body, and the front side and the back side of the main body are rotationally connected with two sliding wheels. When aggregate makes contact with a conical plate, the aggregate can apply downward pressure to the conical plate, after the conical plate is subjected to the downward pressure, a spring is driven to be located on an auxiliary block through a connecting block to be shrunk, then the conical plate is driven to move downwards, and when the spring is shrunk, potential energy is accumulated on the auxiliary block fixed to a fixing block; when a conical plate moves downwards, falling aggregate can be dispersed synchronously, and the situation that when the aggregate is conveyed into a transport vehicle through a first telescopic pipe and a discharging frame, large aggregate rolls to the edge of a material pile in the conveying process, and consequently fine aggregate is accumulated in the middle of the material pile and is difficult to disperse is reduced; the aggregate can be more uniformly distributed in the transport vehicle during conveying, and the overall quality of the aggregate loading device during aggregate loading is improved.

The modular treatment system comprises a rack, a feeding device, a winnowing device, a sorting device and a crushing device, wherein the feeding device, the winnowing device, the sorting device and the crushing device are arranged at intervals in the decoration waste conveying direction; the feeding device comprises a first feeding machine arranged on the rack and used for receiving the decoration garbage and a muck sieve connected with the first feeding machine and used for sieving the entering decoration garbage. The winnowing device is used for winnowing the entered medium aggregate and the entered large aggregate so as to remove light substances in the medium aggregate and the large aggregate respectively; the sorting device is connected with the winnowing device and is used for sorting the entered large aggregates and removing impurities in the large aggregates to obtain inorganic large aggregates; the crushing device is connected with the sorting device and is used for crushing the entered inorganic large aggregate to obtain a finished product material with a required particle size; according to different mixing types of the decoration garbage, different treatment devices are arranged, and recyclable materials in the decoration garbage are screened out and classified and collected, so that secondary utilization of the decoration garbage is achieved.

The utility model discloses a hydraulic station large aggregate batching device which comprises a screening assembly, the screening assembly comprises a base, a screening bin is arranged on the outer wall of the top of the base, a feeding opening is formed in the top of the screening bin, multiple sets of connecting frames are installed on the inner wall of the screening bin, and the connecting frames are symmetrically installed on the inner walls of the two sides of the screening bin respectively. A spring damper is arranged on the outer wall of the top of the connecting frame, a screen plate is installed at the top end of the spring damper, a plurality of sets of vibrators are sequentially arranged and installed on the outer wall of the bottom of the screen plate, two sets of discharging openings are formed in one side of the screening bin and located above and below the screen plate correspondingly, and a sealing assembly used for facilitating discharging is arranged on one side of the screening bin. A batching assembly used for preparing large aggregate is arranged on one side of the base, the sealing assembly comprises multiple sets of fixing frames, the fixing frames are sequentially arranged and installed on one outer wall of the screening bin, and a rotating motor is arranged on the outer wall of one side of each fixing frame.

The invention discloses a high-formwork aggregate silo for constructional engineering, and relates to the technical field of constructional engineering, the high-formwork aggregate silo comprises a silo assembly and a storage silo, a blanking hopper is fixed at the bottom of the storage silo, a discharging assembly is arranged at the bottom of the blanking hopper and comprises a driving part arranged on the blanking hopper, and a sealing plate is slidably connected in the blanking hopper. A flow guide groove is formed in the top of the sealing plate, an air cylinder is fixed to the bottom of the sealing plate, and a buffering piece is arranged on the outer ring of the bottom of the sealing plate. Through the arrangement of the discharging assembly, under the driving of the driving part, the sealing plate moves downwards to be separated from the falling hopper, large aggregate falls off and is discharged through the falling hopper, buffering protection operation is completed through cooperation of the buffering part, the direct falling breakage rate of the aggregate is effectively reduced, and meanwhile through cooperation of the air storage cylinder and the conveying part, in the upward moving and closing process of the sealing plate, the sealing plate is prevented from falling off. Jet-propelled dehumidification operation is completed, and moisture deposited at the bottom of the blanking hopper is well discharged.

This invention discloses a high-efficiency and energy-saving concrete mixing plant, relating to the civil engineering field, aiming to solve the problems of large aggregate leakage and waste, and serious dust pollution in traditional concrete mixing plants. The plant includes a support frame, a mixing tank fixedly connected to the support frame, a mixing shaft rotatably connected inside the mixing tank, a splash guard fixedly connected to the mixing tank above the mixing shaft, an aggregate chute on one side of the splash guard, a lifting aggregate hopper on the side of the aggregate chute, an adjustable base plate rotatably connected to the bottom of the aggregate hopper, a powder hole on the other side of the splash guard, a dustproof cylinder fitted to the powder hole, a spiral feeding pipe connected to the dustproof cylinder, a powder hopper fixedly connected to the spiral feeding pipe, a discharge plate rotatably connected to the mixing tank below the mixing shaft, a discharge hopper fitted below the discharge plate, and a discharge hopper fixedly connected to the support frame. The advantages are: this equipment reduces aggregate leakage and waste, lowers dust pollution, improves material supply stability, and reduces production energy consumption.

The utility model provides construction waste recycling and separating equipment, and relates to the field of construction waste treatment. The construction waste recycling and separating equipment comprises a shell, a feeding hopper and supporting legs, the feeding hopper and the supporting legs are installed on the shell, a screening area, a temporary storage area and a discharging area which are sequentially communicated are arranged in the shell, rotating discs used for rotating are installed in the screening area and the discharging area correspondingly, and one side face of one rotating disc is fixedly connected with an annular screening plate; according to the construction waste recycling and separating equipment, the workload during screening can be reduced, the probability of blockage is reduced, the screening efficiency is improved, by arranging an annular plate and a notch in the annular plate, when the annular plate rotates, the notch can intermittently supply and discharge materials, and when a sealing face of the annular plate moves to the position corresponding to a temporary storage area, the sealing face can not be blocked. And the annular plate seals the temporary storage area, so that the retention time of the aggregate in the temporary storage area is prolonged, and the aggregate in the temporary storage area can have sufficient time to be separated from solid dust particles.

The invention relates to the related technical field of concrete pouring and molding, in particular to concrete grouting equipment based on an embedded energy-saving sleeper beam and a grouting splicing method thereof.The concrete grouting equipment comprises a frame body and further comprises a material groove formed in the frame body and a baffle connected with the material groove in a sliding mode; a plurality of first through holes and second through holes are formed in the trough and the baffle in the width direction at equal intervals; the assembling plate is arranged on the frame body and can move back and forth in the length direction of the frame body, a guide arm is arranged at the bottom of the assembling plate, the guide arm is sleeved with a telescopic arm in a sliding mode, and the bottom end of the telescopic arm is rotationally connected with two material pushing plates through shaft pins; the two material pushing plates are arranged and can be in a V shape and a linear shape in the back-and-forth movement of the assembly plate, and the situation that large aggregates are squeezed and meshed mutually, sufficient dispersion is difficult to achieve, the phenomenon of large aggregate clustering occurs in the middle or the lower portion of a sleeper beam finally, and the top of a mold is in the segregation state of slurry enrichment and aggregate depletion is caused is effectively avoided.

The invention belongs to the technical field of solid waste resource utilization, and discloses an ecological improvement matrix prepared from waste slag stone and used for improving soil aggregate stability and a preparation method of the ecological improvement matrix. According to the method, the problem of resource utilization of the waste slag stone in the production and processing process of a stone factory is solved, the waste particle slag stone is crushed, and biomass charcoal, corn straw, urea and a microbial agent which has the capacity of dissolving phosphorus, dissolving potassium and fixing nitrogen and can generate exopolysaccharides, such as paenibacillus mucilaginosus JZ1 and scenedesmus EMC7 are added, so that the biomass charcoal, the corn straw, the urea and the microbial agent are added, and the biomass charcoal, the corn straw and the urea are added. And fully stirring to prepare the ecological improvement substrate. The ecological improvement matrix is applied to soil, soil nutrients can be released in a long-acting mode, the content of large aggregates in the soil is increased through electronic adsorption, organic and inorganic cementation and other modes, the damage rate of the soil aggregates is reduced, the corrosion resistance of the soil is improved, and finally reasonable utilization of slag stone resources is achieved.

The utility model relates to the field of steel fiber reinforced concrete recovery processing, and discloses a steel fiber reinforced concrete crushing and recovering device which comprises a box body, a sub-packaging mechanism is installed outside the box body, the sub-packaging mechanism comprises a conveying assembly and an impurity removing assembly, a dust removing assembly is installed outside the box body, and a smashing assembly is installed inside the box body. And the impurity removing assembly comprises a transverse plate, the transverse plate is fixedly connected to the exterior of the box body, and a bottom plate is fixedly connected to the bottom of the transverse plate. According to the utility model, through the matching of the magnetic conveying belt and the scraper, the split charging of steel fibers and large aggregates is realized under the condition of not wasting materials, and the working efficiency of operators is improved; besides, through the action of a spray rod and an atomization spray head, the problem that the quality of recycled steel fibers and aggregates is affected due to excessive dust in the steel fiber concrete machining process is solved, and meanwhile, the harm of flying dust to the body of an operator is reduced.

The utility model provides an aggregate sorting device for road and bridge construction, which relates to the technical field of road and bridge construction and comprises a mounting frame, a feed hopper is fixedly connected to the top of the mounting frame, a supporting component is arranged on the mounting frame, and a plurality of screening components are sequentially arranged on the supporting component. The screening component comprises a groove body, a first discharging opening, a second discharging opening, a supporting frame and a screening net assembly. One side of the tank body communicates with a first discharge port, the bottom of the tank body communicates with a second discharge port, the supporting frame is fixedly connected to the inner side wall of the tank body, and the screening net assembly is arranged on the supporting frame; according to the aggregate screening device, aggregate enters the uppermost screening part through the feeding hopper and is screened step by step, the particle sizes of the aggregate discharged from the second discharging ports in the screening parts from top to bottom are sequentially reduced, and the large-block-shaped aggregate which does not meet the construction requirement is discharged through the bottommost first discharging port; according to the multi-stage sorting structure, aggregates with different particle sizes can be sorted out more accurately.

This invention provides a method and experimental apparatus for inverting and constructing the structure of concrete aggregates, belonging to the field of concrete testing technology. This method and apparatus can obtain the true spatial position and orientation of target aggregates within concrete, achieving three-dimensional reconstruction of key aggregates. Based on the reconstruction results, a concrete-aggregate three-dimensional structural model consistent with the specimen is simultaneously established in the numerical model. Without damaging the specimen structure, the large aggregates within the concrete specimen are precisely located, and their spatial information is used for three-dimensional structural inversion and numerical modeling. This technical solution achieves a high degree of consistency between experimental results and theoretical analysis and numerical simulation, meeting the engineering needs of concrete fracture mechanism research and complex structural performance evaluation.

This invention belongs to the field of water environment management technology and discloses a method for efficiently reducing water turbidity and improving water transparency using natural minerals. The method includes: S1, preparing a turbidity removal container using a material that is acid-resistant, corrosion-resistant, and has good water permeability and air permeability; S2, crushing natural minerals rich in iron and aluminum functional substances, then spraying an aqueous solution of iron-sulfur oxidizing bacteria onto their surface, mixing thoroughly, and then placing the mixture into the turbidity removal container; S3, completely immersing the turbidity removal container in the turbid water to be treated. This invention utilizes the iron and aluminum elements in natural minerals to form a large-area, highly active iron-aluminum flocculent gel under the action of water waves and dissolved oxygen. This gel, through charge neutralization and adsorption bridging, aggregates with particulate matter in the water to form larger aggregates, while simultaneously sweeping in suspended small particulate impurities. These impurities then settle to the bottom of the water body by gravity, effectively removing particulate matter, reducing water turbidity, and improving water transparency.