30 results about "Large aggregate" patented technology

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 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.

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 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 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.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device for hydraulic engineering. The device comprises a bearing seat arranged at the top of a treatment tank, and the bearing seat is rotationally connected with a main rod towards the axis in the treatment tank; the outer wall of the treatment tank is sleeved with an interlayer, and a separation cavity is defined by the inner wall of the interlayer and the outer wall of the treatment tank; along with the increase of sewage treatment time, the amount of aggregates generated on the inner side of the intercepting plate is gradually increased, and in a centrifugal force field generated by stirring of the stirring assembly, the larger the weight of the aggregates is, the easier the aggregates move in the direction away from the axis of the main rod. Meanwhile, under the driving of the paddles with different heights, the aggregate ascends along the inclined surface of the inner wall of the intercepting plate; therefore, the rising liquid drives a large aggregate reaching the height position of the fixed arm, and the large aggregate passes through the separation hole along with a small amount of sewage under the overflow action, reaches the separation cavity and falls to the cleaning hole, so that the aggregate is cleaned on the premise of continuously treating the sewage.

The utility model belongs to the technical field of concrete conveying, and discloses an ultrahigh concrete pumping pipeline anti-blocking device which comprises a structural sleeve, a pumping pipeline, a movement mechanism, a vibration generation mechanism, a vibration rod return mechanism, a power mechanism and the like, and the movement mechanism, the vibration generation mechanism, the vibration rod return mechanism, the power mechanism and the like are arranged between two groups of protection side plates on the structural sleeve. The movement of the movement mechanism serves as the basis for achieving the vibration function, the vibration generation mechanism and the movement mechanism are matched to achieve the vibration function, the vibration rod return mechanisms are arranged on the two sides of the vibration generation mechanism on the structural sleeve and used for returning parts of the vibration generation mechanism, and periodic vibration of the device can be achieved. The ultrahigh concrete pumping device is compact and reasonable in structural design and can be mounted on the pump pipe in a sleeving manner to vibrate the pump pipe, so that pipeline blockage caused by accumulation of large aggregates in the pump pipe is prevented, construction safety can be greatly improved, and smooth completion of ultrahigh concrete pumping operation is guaranteed.

This utility model provides an aggregate feeding mechanism for a concrete production line, relating to the field of concrete production technology. It includes a base plate, with a base and an auger conveyor fixedly connected to the top of the base plate. The base is installed on one side of the auger conveyor, and a support frame is installed at the top of the base. A crushing mechanism is installed inside the support frame. A sorting box is set above the base, and a screening component is installed inside the sorting box. The screening component includes a vibrating motor, which is fixedly connected to the front of the sorting box. Multiple springs are fixedly connected to the bottom of the sorting box, and the bottom ends of the springs are fixedly connected to the top of the base. Two first inclined plates are fixedly connected inside the sorting box. By setting the screening component and the crushing mechanism, aggregates of different sizes can be screened, and larger aggregates can be conveyed to the support frame for further crushing, resulting in a more uniform aggregate particle size. Simultaneously, it effectively crushes large aggregates into smaller particles, making the aggregate more uniform and dense.

The invention discloses a high-paving-thickness core wall asphalt concrete construction and mix proportion design method, and belongs to the technical field of asphalt concrete core wall rock-fill dams. The recommended mix proportion of the core wall asphalt concrete matched with the construction method is determined on the basis of a mix proportion design method, and the construction method comprises the steps that firstly, high-paving-thickness core wall asphalt concrete with the thickness of 350-400 mm is paved; secondly, after paving is completed, transition materials on the two sides of the core wall are paved, and the paving thickness of the transition materials is consistent with that of the core wall; and finally, graded rolling work is conducted, specifically, heavy rolling equipment is adopted for rolling, and the tonnage of the rolling equipment is larger than that of conventional rolling equipment. According to the construction method, a high-paving-thickness construction technology is adopted, traditional paving thickness limitation is broken through, the paving layer number is reduced, the construction progress is accelerated, and it is guaranteed that the quality is stable and controllable; by increasing the maximum particle size of the aggregate and optimizing the gradation of the aggregate, it is ensured that the core wall asphalt concrete can still meet the requirements for high seepage-proofing and mechanical properties under the heavy rolling process, and accurate adaptation of the material performance and the construction process is achieved.

The invention discloses an efficient mixing and putting generation method and system for a concrete three-dimensional mesoscopic model, and relates to the technical field of mechanics and composite material numerical simulation. The method comprises the steps that aggregate grading is determined, and interval discretization processing is carried out; establishing a polyhedral aggregate geometric template library; constructing a large aggregate skeleton based on an in-situ generation strategy; putting medium aggregate based on a global random sequence adsorption strategy; and based on a space grid indexing mechanism, small aggregate putting is accelerated. According to the efficient mixed putting generation method and system for the concrete three-dimensional mesoscopic model, the background space grid index algorithm is innovatively introduced for putting of a large number of small aggregates, and the global collision detection complexity O (N2) which is exponentially increased along with the number of the aggregates in a traditional random sequence adsorption algorithm is converted into the global collision detection complexity O (N2) which is exponentially increased along with the number of the aggregates. The optimization is that only constant-level detection O (C) needs to be carried out in a local neighborhood, so that the computing power bottleneck of construction of a high-volume-fraction mesoscopic model is broken through, and efficient putting of massive aggregates is realized.

This utility model relates to the field of concrete pump truck hopper technology and discloses an anti-clogging device for a tunnel concrete pump truck hopper. The device includes a hopper body, a discharge pipe bolted to the front end of the hopper body, an S-tube rotatably connected inside the discharge pipe, a double-layer clamping plate fixedly connected to the outer circumference of the S-tube, a scraper bolted to the inside of the double-layer clamping plate, and a swing arm fixedly connected to the outer circumference of the S-tube. A swing shaft is clamped inside the swing arm. This utility model effectively prevents clogging during the conveying process, ensuring the continuity and stability of concrete pumping. The grating plate intercepts large aggregates and impurities, preventing them from entering the hopper body and causing clogging. The transverse stirring rod drives the blades and arc-shaped plate to continuously stir, preventing concrete from solidifying and clumping, maintaining good fluidity. When the S-tube swings, the scraper simultaneously scrapes the bottom surface of the hopper, removing adhering concrete and preventing accumulation and solidification. The synergistic effect of all components significantly reduces the risk of clogging.

The invention provides a conditioner for promoting formation of soil water-stable large aggregates and a preparation method thereof, and relates to the technical field of soil improvement, the soil conditioner is prepared from the following raw materials in parts by weight: 30-80 parts of decomposed organic fertilizer, 4-10 parts of humic acid, 4-10 parts of biomass charcoal, 1-5 parts of diatomite, 2-6 parts of nano calcium carbonate and 3-7 parts of polyacrylamide. 3-7 parts of a composite microbial agent, 1-5 parts of an iron and manganese oxide modified material, 3-6 parts of a binder and 1-3 parts of seaweed oligosaccharide. According to the soil conditioner, the organic-inorganic-biological three-in-one synergistic effect is adopted, the decomposed organic fertilizer and the biochar provide a living environment for the microbial agent, the humic acid and the polyacrylamide enhance the water and fertilizer retention capacity, and the diatomite, the nano calcium carbonate and the iron and manganese oxide modified materials synergistically improve the physical and chemical properties of soil.

This invention discloses a method for measuring the surface porosity of concrete using small samples based on nuclear magnetic resonance (NMR). It belongs to the field of non-destructive testing technology for building materials, specifically for determining the maximum aggregate size in concrete and establishing a standard representative cylinder diameter. The method involves calibrating the equipment to accommodate small core sample diameters and calculating the equivalent area fractions. The number of virtual representative units and the number of samples per unit are set according to the target measurement accuracy. A dual-counting algorithm is used to solve for the theoretical minimum number of basic samples, and the existence of an integer allocation scheme that satisfies the group-sharing constraint is verified. If grouping is not feasible, the algorithm automatically increments until a valid grouping is obtained. Basic samples are collected to construct virtual units according to the allocation scheme. The porosity of each unit is calculated, averaged, and the overall surface porosity is output. This method avoids the need for direct measurement of large-size standard samples, reduces core sampling costs and measurement time, and improves the reliability of the results.

The utility model discloses building construction aggregate mixing equipment which comprises a mixing barrel, an auxiliary mechanism is arranged in the mixing barrel, and the auxiliary mechanism extends out of the mixing barrel; the auxiliary mechanism comprises a motor, the motor is fixedly arranged at the top of the mixing barrel, and the motor is fixedly connected with a rotating rod through an output shaft. Through the design of the auxiliary mechanism, the aggregate can be crushed through the design of a plurality of crushing cutters, and then the screen plate can be knocked through the mutual cooperation of the screen plate, the knocking plate and the spring, so that the aggregate can be conveniently screened; some aggregates with unqualified sizes can be conveyed to the top of the conveying box through the spiral conveying rod, and can be crushed again through the crushing cutter, so that the sizes of the aggregates can reach the standard, and the aggregates pass through the net plate, so that the situation that some aggregates with larger sizes are easily doped in sand and stones is avoided, and the quality of mixed concrete is ensured; and the use of operators is facilitated.