10 results about "Large aggregate" patented technology

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.

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 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.

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.

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 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.

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.

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.