12 results about "Aggregate base" patented technology

This invention discloses a method and system for constructing a microscopic model of recycled concrete based on a three-dimensional five-phase spherical model, belonging to the field of numerical simulation technology for building materials. The method includes: constructing a co-simulation environment and creating a new mortar matrix; setting the core particle size of natural aggregate, the thickness of the old interface transition zone, the thickness of the old mortar, and the thickness of the new interface transition zone; generating single-particle aggregates and recursively calculating the outer diameter of each layer; generating random spatial coordinates that satisfy boundary constraints; placing aggregates based on a random sequential adsorption algorithm and Euclidean distance interference judgment criterion; parameterizing the effective aggregates to generate four concentric spherical geometries and marking them according to preset naming rules; repeating the placement until the target volume is reached; and automatically aggregating spherical geometries of the same medium type into an explicit selection set using naming rules. This invention solves the problems of single-dimensionality, missing microphases, and low modeling efficiency in existing technologies, achieving high-precision and automated construction of the five-phase structure of recycled concrete, providing an accurate numerical model for subsequent mechanical property and durability analysis.

This invention belongs to the technical field of engineering construction and discloses a device and method for adjustable pressure measurement of recycled aggregate based on layered vibration method. It includes: a layered drum section; a screening plate section located inside the layered drum section, including screening plates in upper, middle, and lower layers, and a stepper motor for driving the rotation of the screening plates; a discharge and detection section for moving and limiting the screening plates, including a reducer and gears for driving the left and right movement of the screening plates, and a rack for providing the movement range of the gears in the reducer and gears; a vibration section located below the layered drum section, where the layered drum section vibrates up and down under the rotation of a willow-leaf wheel; a base and discharge port section for supporting the entire device and providing the discharge position; and a hydraulically adjustable pressure block measuring section located on one side of the base and discharge port section. This invention performs screening and performance testing on crushed recycled aggregate to obtain the strength of different types of aggregate.

This invention discloses a negative carbon lightweight aggregate based on CO2 mineralization of coal-based solid waste and its preparation method, belonging to the technical field of solid waste resource utilization and low-carbon building materials. The method uses coal-based solid waste such as fly ash and coal slag as main raw materials, introducing uniform micropores through spray granulation with a trace amount of hydrogen peroxide solution. After pre-curing and drying, it is then mineralized and solidified using a low-concentration CO2 atmosphere. This method eliminates the need for cement or other cementing materials, resulting in low cost and no indirect carbon emissions. Furthermore, by synergistically controlling the hydrogen peroxide foaming and CO2 mineralization enhancement processes, the bulk density of the aggregate is significantly reduced; the resulting aggregate has a low bulk density (630~860 kg / m³). 3 With a compressive strength of 4.1~6.0MPa and a water absorption rate of 14~20%, it can meet the requirements of super high-rise buildings, large-span structures, prefabricated components, and the reinforcement and renovation of old buildings, significantly increasing the applicability and economy of coal-based solid waste lightweight building aggregate.

The present application relates to the technical field of concrete aggregate storage, and particularly relates to an intelligent temperature control method and system for concrete aggregate, which comprises the following steps: obtaining dew condensation monitoring data of each detection point in a storage bin; periodically determining a dew condensation characteristic value based on the dew condensation data; determining whether the storage of the concrete aggregate is qualified based on the average dew condensation characteristic value; and when it is determined that the storage of the concrete aggregate is abnormal, adjusting the storage parameters for the concrete aggregate based on the abnormal distribution value of the detection points and the proportion of abnormal detection points, including adjusting the refrigerant flow rate to a corresponding value based on the volume of the storage bin, or adjusting the operating power of each cold air fan to a corresponding value based on the distribution uniformity; and monitoring the storage temperature of the concrete under high-temperature conditions to adjust the storage parameters for the concrete, thereby improving the storage efficiency of the concrete.

This invention discloses an automatic optimization method and system for continuous gradation of coarse aggregate with dense packing, belonging to the field of building materials technology. The method includes: S1: taking several portions of dense mixed aggregate of the same volume, each portion containing a different proportion of aggregates of various particle sizes; S2: weighing the selected mixed aggregates to obtain a total weight; S3: sieving the selected mixed aggregates and weighing the sieved aggregates of each particle size grade; S4: determining whether to retain the current group of mixed aggregates based on the weight of all or part of the sieved aggregates of each particle size grade, as well as the maximum and minimum weights corresponding to each grade; when the aggregate weights all meet the requirements... y min < y j < y max S5. Select the group with the largest total weight from the retained mixed aggregates and use the ratio corresponding to that group as the preferred ratio. This invention can automatically obtain the blending ratio of each grade of material in a closely packed continuous gradation.

This invention discloses a rapid detection method and device for the coating state of milled asphalt pavement aggregate based on multispectral imaging, belonging to the field of road material testing technology. The device includes a sample carrying and transport module, a multispectral imaging module, and a data processing and control module. This invention acquires multispectral images of milled aggregate in the visible-near-infrared band under multi-light source conditions, and uses image classification algorithms to automatically and accurately identify and distinguish asphalt-coated areas from exposed aggregate areas, thereby calculating quantitative indicators such as asphalt coating rate and coating uniformity index. This invention effectively solves the problems of strong subjectivity and poor accuracy in traditional manual inspection, achieving an objective, rapid, and quantitative evaluation of the quality of milled aggregate.

The application discloses an asphalt mixture aggregate motion tracking method, which comprises the following steps: rotating and compacting the same asphalt mixture test piece for multiple times, and performing CT scanning after each compaction to obtain a CT image sequence of the test piece under multiple different compaction states; taking the first state CT image obtained by the first scanning as a reference to perform spatial correction on the CT images of subsequent states; performing three-dimensional reconstruction on the CT images under each compaction state based on a segmentation result, extracting feature parameters of each aggregate, performing multi-feature weighted matching on the aggregates of adjacent compaction states based on the feature parameters, establishing a unique corresponding relationship of the aggregates across compaction states, and constructing a complete motion trajectory of all compaction states based on the unique corresponding relationship. The application realizes continuous tracking of the whole compaction process of the aggregates based on a real CT experiment, and solves technical problems such as difficulty in spatial registration, insufficient segmentation accuracy, and difficulty in identifying aggregates across states.

The application discloses a kind of based on solution circulation percolation's recycled concrete aggregate high-efficiency carbonation device and carbonation method, the device is sequentially provided with carbon dioxide gas supply system, liquid storage tank, micro-nano bubble carbonated water generating system, atomizing spray system, storage reaction system along the flow direction of aqueous solution.The application utilizes the based on solution circulation percolation's recycled concrete aggregate high-efficiency carbonation device to carry out carbonation, including: after drying recycled concrete aggregate is evenly filled into storage reaction system, while pouring aqueous solution in liquid storage tank;Carbon dioxide gas is introduced by opening carbon dioxide gas supply system, micro-nano bubble carbonated water generating system is started to the recycled concrete aggregate sustained carbonation, during maintaining the supply of carbon dioxide gas and the circulation of aqueous solution, i.e., recycled concrete aggregate after carbonation can be obtained.The application provides a new method for large-scale carbonation treatment of recycled concrete aggregate, which has low cost, high efficiency and convenient implementation, and has practical engineering application potential.

This invention discloses a method, system, computer program product, and storage medium for estimating the mud powder content of fine aggregates based on multiple features. First, multiple physical characteristic parameters of the manufactured sand fine aggregate to be tested are acquired. These parameters include methylene blue value, particle size distribution parameters, powder parameters, and parent rock lithological characteristics. The parent rock lithological characteristics are lithological codes obtained by numerically mapping different rocks. Then, all physical characteristic parameters are input into a neural network model. This model is pre-trained using a training dataset, which uses the physical characteristic parameters of historical samples as input and the actual mud powder content as output. Finally, the estimated mud powder content output by the neural network model is obtained. The method, system, computer program product, and storage medium provided by this invention can accurately, quickly, and conveniently determine the mud powder content in manufactured sand fine aggregates, and have extremely high industrial practical value.

The application discloses a kind of high-performance waste plastic fiber reinforced recycled concrete aggregate base composite materials and preparation method thereof, belong to building material technical field.Composite material with recycled concrete aggregate as matrix, compound waste PET fiber, fly ash, mineral powder, silica fume, Portland cement and other raw materials;Preparation method includes six core steps of raw material grading pretreatment, waste PET fiber reinforced recycled concrete aggregate processing, composite batching gradient stirring, grading compression molding, constant temperature and humidity curing and performance post-processing, and process parameters of each step are accurately controlled.The application solves the problems of low shear strength of recycled concrete aggregate, poor interface bonding of waste PET fiber and aggregate, etc.The prepared composite material has cohesion ≥34.8kPa, internal friction angle ≥46.6°, and the comprehensive performance such as shear strength and compressive strength is significantly improved, which can be widely used in highway pavement base, building roadbed, municipal engineering cushion and other building fields.

A core-shell type carbonized artificial aggregate based entirely on solid waste and its preparation method are disclosed, relating to the field of artificial aggregate technology. The water-cement ratio is 0.15–0.25, comprising, by mass percentage: 10%–30% red mud, 10%–30% steel slag, 35%–50% granulated blast furnace slag, 5%–15% fly ash, 3%–7% alkali activator, and 0.5%–1% water-reducing agent. During the preparation process, a mixture of alkali activator and water-reducing agent is sprayed during granulation. The core is obtained by granulation of a mixture of red mud, steel slag, fly ash, and 37%–60% granulated blast furnace slag. The outer shell is obtained by further granulation of the remaining granulated blast furnace slag on top of the core. Under the condition of meeting national standards, this method helps reduce the excessive use of natural aggregates and the environmental problems caused by the accumulation of industrial solid waste. The preparation method uses a cold bonding method, which is simple and has low energy consumption.

This invention discloses a rapid static and dynamic mixing method for transparent sand pore fluid based on real-time temperature feedback, belonging to the field of geotechnical engineering physical model testing technology. This invention uses an improved transparent soil model box, which consists of a base plate, a transparent box body, and a nozzle. The method includes the following steps: a static mixing step, comprising: A1: obtaining the test environment temperature; A2: calculating the optimal component ratio that matches the refractive index of the pore fluid with the refractive index of the transparent aggregate based on a pre-constructed empirical formula relating the pore fluid refractive index to temperature and component ratio; A3: weighing the component materials according to the optimal ratio and mixing them uniformly to obtain the pore fluid. The advantages are: this invention overcomes the shortcomings of traditional transparent sand preparation methods that rely on repeated trial mixing and cannot adapt to changes in environmental temperature, achieving rapid and accurate mixing of transparent sand at specific temperatures or in variable temperature environments, effectively improving the effective resolution of laser speckle and the measurement accuracy of the displacement field during the test.