49 results about "Aggregate base" patented technology

The invention relates to a method for improving recycled aggregate quality based on grinding among aggregates, and belongs to the technical field of recycled building material treatment. According to the method, the primary rate K of the recycled aggregate is measured through sampling, the grinding time of the recycled aggregate is determined according to the formula K = 0.0228 square root of X + 0.7, the grinding efficiency and accuracy are accurately controlled, loose mortar on the surface is removed, the porosity is reduced, and therefore the water absorption rate is reduced, and the quality of the recycled aggregate is improved.

The invention discloses an automatic optimal selection method and system for coarse aggregate close packing continuous grading, and belongs to the technical field of building materials. The method comprises the following steps: S1, taking a plurality of parts of dense mixed aggregates with the same volume, wherein the proportions of aggregates with various particle sizes in each part of the mixed aggregates are different; s2, respectively weighing the mixed aggregates to obtain a plurality of total weights; s3, respectively screening the mixed aggregates, and weighing the screened aggregates with different particle sizes; s4, judging whether the current group of mixed aggregate is reserved or not according to the weight of all or part of the screened aggregate with the particle size level and the maximum weight and the minimum weight corresponding to each level; when the aggregate weights all meet yminlt; yjlt; yjt; when ymax is greater than ymax, the mixed aggregate proportion corresponding to the group of data is reserved; and S5, selecting the group with the maximum total weight from the retained mixed aggregates, and taking the proportion corresponding to the group as a preferable proportion. According to the invention, the blending proportion of each grade of materials during close packing continuous grading can be automatically obtained.

The invention discloses a preparation method of a superfine full tailings and machine-made sand composite filling material. The preparation method comprises the following steps: step 1, measuring particle size distribution of superfine full tailings and machine-made sand; based on the proportion range of the preset size fraction, the mass ratio range of the superfine full tailings and the machine-made sand in the filling aggregate is determined; 2, the cement-sand ratio is fixed, and the mass ratio of the superfine full tailings to the machine-made sand is changed to prepare a plurality of sets of filling slurry; measuring the critical mass concentration when each group of filling slurry meets the preset slump; step 3, preparing a first filling body from each group of filling slurry according to critical mass concentration; maintaining and testing the age strength, and determining the optimal mass ratio according to the maximum strength; 4, according to the optimal mass ratio and the corresponding critical mass concentration, the lime-sand ratio is changed to prepare a plurality of sets of second filling bodies; maintaining and testing the age strength; 5, establishing a cement-sand ratio-strength theoretical model according to the age strength; and determining the cement-sand ratio meeting the target strength based on the theoretical model.

The application discloses a kind of based on construction waste recycling's recycled aggregate preparation method, it is related to building material technical field, including the following steps: construction waste is broken to obtain preliminary aggregate, then separation is carried out by magnetic separation device, remove metal by magnetic separation, avoid subsequent processing equipment to cause damage to aggregate;Preliminary aggregate is broken again, then aggregate is ground and collides;Recycled aggregate is screened according to different particle sizes using vibrating screen, by screening recycled aggregate according to different particle sizes, it is convenient to classify and utilize as needed for different particle sizes of recycled aggregate, reduce waste, improve the market applicability of recycled aggregate;The application also removes metal in aggregate efficiently by the cooperation of magnetic separation device, so that the quality of recycled aggregate prepared by the method is higher.

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.

The invention relates to the technical field of building materials, in particular to a method for reducing microcracks of recycled aggregate based on pre-infiltration treatment, which comprises the following steps: pre-infiltrating high-strength concrete recycled aggregate by using a saturated lime aqueous solution, calculating the number N of dry-wet cycles according to the crack width, and carrying out quantitative treatment on the number N of pre-soaking times, the controllability and repeatability of the recycled aggregate treatment process are remarkably improved, microcracks on the surface of the recycled aggregate are sealed after treatment, and then the long-term performance of recycled aggregate concrete is improved.

The invention discloses an asphalt mixture aggregate motion tracking method, which comprises the following steps of: performing rotary compaction on the same asphalt mixture test piece for multiple times, and correspondingly performing CT scanning after each time of compaction to obtain a CT image sequence of the test piece in multiple different compaction states; performing spatial correction on the CT image in the subsequent state by taking the first state CT image obtained by the first scanning as a reference; and performing three-dimensional reconstruction on the CT image in each compaction state based on a segmentation result, extracting a characteristic parameter of each aggregate, performing multi-characteristic weighted matching on the aggregates in adjacent compaction states based on the characteristic parameters, establishing a unique corresponding relation of the aggregates across the compaction states, and constructing a complete movement track of all the compaction states based on the unique corresponding relation. According to the method, continuous tracking of the aggregate full-compaction process based on a real CT experiment is realized, and the technical problems of difficulty in space registration, insufficient segmentation precision, difficulty in cross-state aggregate recognition and the like are solved.

The invention relates to a coal gangue coarse aggregate strength test method for a lime-fly ash stabilized base, and belongs to the technical field of highway engineering. According to the test method, the coal gangue soaking compressive strength R is adopted as an index for judging the mechanical property of the coal gangue coarse aggregate, and the applicability of the coal gangue coarse aggregate is further verified through a two-ash stabilized base mixture 28d unconfined compressive strength test. When R is greater than or equal to 4 * Rdmin, preliminarily judging that the strength of the coal gangue coarse aggregate is qualified; otherwise, judging that the product is unqualified; after preliminary judgment is qualified, the applicability of the strength of the coal gangue coarse aggregate is further verified through 7d and 28d unconfined compressive strength tests. According to the method, the correct test method and index are adopted, scientific test judgment is conducted on the applicability of the coal gangue coarse aggregate in the lime-fly ash stabilized aggregate base layer, the coal gangue coarse aggregate can be used up under the condition that the quality of the lime-fly ash stabilized coal gangue coarse aggregate base layer is guaranteed, and opportunities are provided for reducing the cost of the lime-fly ash stabilized base layer and protecting the environment as much as possible.

This application discloses a method for determining the classification criteria of wear-resistant and skid-resistant aggregates based on the MMLS accelerated loading test. The method includes: obtaining various physical and mechanical properties of the aggregate; obtaining multiple friction pendulum measurements on rutted slab specimens formed from the aggregate under accelerated loading conditions applied by an MMLS accelerated loading testing machine; establishing linear fitting relationships between the friction pendulum values ​​and each physical and mechanical property; based on the linear fitting relationships, estimating the physical and mechanical property values ​​from preset key friction pendulum values; and combining the key friction pendulum values ​​and the estimated physical and mechanical property values ​​to form a classification standard. This scheme provides a reference for the design of skid-resistant asphalt pavements, considers the influence of aggregates in existing skid-resistant pavement designs, and provides a more scientific design method for the design of skid-resistant and durable asphalt pavements, enabling asphalt pavements to have excellent skid resistance while maintaining other properties unchanged.

The utility model discloses a regenerated inorganic material road with strong water filtering and absorbing capabilities, and relates to the technical field of road engineering. The recycled inorganic material road with the high water filtering and absorbing capacity comprises an inorganic aggregate base layer in the middle and drainage ditches on the two sides, side plates and a shaping template are arranged at the top of the inorganic aggregate base layer, the side plates are located on the two sides of the shaping template, and the shaping template comprises a bottom plate; the bottom plate is connected with a main baffle located in the middle and auxiliary baffles located on the two sides of the main baffle, the heights of the auxiliary baffles are gradually reduced along with the distance from the main baffle, the side plates are provided with drainage holes aligned with the auxiliary baffles on the outermost side, and a concrete stabilizing layer is poured in the shaping formwork. And a regenerated inorganic mixture layer is poured at the top of the concrete stabilizing layer. The regenerated inorganic material road with strong water filtering and absorbing capabilities has the beneficial effects of good water absorbing and draining effects, no influence on road strength and suitability for use in cold regions.

The invention discloses carbon sequestration lightweight aggregate anti-crack concrete which is prepared from the following raw materials: cement, fly ash, mineral powder, reinforced modified carbon sequestration lightweight aggregate, coarse aggregate, fine aggregate, water and an additive, the reinforced and modified carbon-sequestration lightweight aggregate is prepared by taking low-carbon cement, regenerated micro powder, desulfurized petroleum coke residue powder, sludge powder, dust collection stone powder and water as main raw materials, granulating, carbonizing and curing, thereby obtaining the carbon-sequestration lightweight aggregate. And then, modifying by using a reinforced modification liquid formed by phosphate starch, latex powder, xanthan gum, polyethylene glycol and fatty alcohol-polyoxyethylene ether. According to the reinforced and modified carbon-sequestration lightweight aggregate, the carbon-sequestration lightweight aggregate based on low-carbon cement and various solid wastes is combined with the reinforced and modified components, good water absorption, water retention and other properties can be taken into account, when the reinforced and modified carbon-sequestration lightweight aggregate is applied to preparation of concrete, the compactness, deformation resistance and other properties of a concrete structure can be effectively improved, and the service life of the concrete is prolonged. Good mechanical properties, durability and remarkable economic and environmental effects are considered, and the applicability is wide.

The utility model relates to the technical field of road engineering, and discloses a novel pavement paving device for road engineering, which comprises a device main body, the top of the device main body is fixedly connected with a material storage box, the top of the material storage box is fixedly connected with a feeding hopper, a stirring assembly is arranged in the material storage box, and the stirring assembly is fixedly connected with the feeding hopper. A feeding mechanism, a paving mechanism and a rolling mechanism are sequentially arranged at the bottom of the device main body. According to the utility model, through the stirring assemblies and the feeding mechanism, the three groups of stirring assemblies are used for blending and stirring a plurality of gravels and stone chips with different particle sizes and the gap filler which are fed into the storage box to prepare graded gravels for paving the aggregate base layer of the road surface, and the gravels and the stone chips are uniformly distributed through the material distribution box connected with the storage box; a plurality of spreading buckets are matched with a vibration motor to uniformly and efficiently oscillate, spread and discharge, so that graded broken stones are efficiently blended to uniformly oscillate and spread a road surface.

The invention belongs to the technical field of laminated slab recycled aggregate preparation equipment, and particularly relates to a preparation method and equipment based on laminated slab recycled aggregate. The device further comprises a dust falling mechanism. The dust falling mechanism comprises a base fixedly connected with the crusher, a hollow rectangular frame is arranged above the base, a water suction pump is fixedly mounted in the rectangular frame, and a liquid suction pipe and a liquid outlet pipe which are communicated with the interior of the water suction pump are fixedly mounted on the water suction pump; through cooperative use of the designed dust falling mechanism and the diffusion assembly, when recycled aggregate enters the feeding port of the crusher, water mist sprayed by the atomization spray head can effectively inhibit dust generated during falling and preparation of the recycled aggregate, and then overflow of the dust is controlled. Meanwhile, dust entering precise parts such as bearings and gears of the crusher can be effectively reduced through spraying and dust falling, so that abrasion of equipment is relieved, and the service life of the equipment and the service life of the parts are prolonged.

The invention belongs to the technical field of road engineering materials, and relates to a cement stabilized gravel arch expansion resistant grading design method. The method comprises the following steps: designing a coarse aggregate proportion by taking maximization of an embedding and extruding force as a principle; determining the optimal fine aggregate gradation by taking the maximum bending-tensile strength peak value as a principle; mixing the coarse aggregate and the fine aggregate according to different mass ratios, and calculating the residual void ratio of different aggregate gradation; determining a mass ratio of the coarse aggregate to the fine aggregate based on a preset residual void ratio threshold value; mixing the coarse aggregate and the fine aggregate to prepare a middle beam test piece, and performing a temperature-strain test to determine the optimal ratio of the coarse aggregate to the fine aggregate; and calculating and determining the anti-arch expansion gradation of the cement stabilized gravel according to the determined gradation of the strongly-embedded coarse aggregate, the determined gradation of the high-toughness fine aggregate and the optimal ratio of the coarse aggregate to the fine aggregate. The problems that gradation embedding and extruding force designed through a traditional empirical method is insufficient, reserved gaps used for containing expansion reaction and accelerating expansion stress release are ignored, high cement dosage is needed to guarantee strength, and carbon emission is increased are solved.

The invention relates to a method for constructing a brown soil water-stable aggregate based on synergism of straw carbonized micro-material and deep scarification, which comprises the following steps of: taking a soil sample of 0-30cm to judge an operation water-containing window according to the standard that the soil sample can be kneaded into a cluster and can be cracked after being slightly pressed, supplementing water if the soil sample powder is scattered, and naturally losing water if the soil sample powder is sticky to hands or troweled until the soil sample powder reaches the standard; the method comprises the following steps: performing oxygen-limited carbonization, crushing and screening on straws to obtain carbonized micro-materials with the particle size of 20-200 mu m, removing parts with the particle size of less than 20 mu m, performing deep scarification on the micro-materials in a water window state to form rebound compaction strips, and forming stress hinge belts with shear junctions; in the deep scarification process, carbonized micro-materials are precisely put into the hinged belt, a loose area is avoided, then the hinged belt is wetted in a controlled-quantity mode, water supply is stopped when water permeates into the surface layer along pores to form plastering or sticky slip, operation is delayed, and soil particles in the hinged belt are induced by the carbonized micro-materials when water naturally loses till soil balls can be held, finger pressing marks are reserved and the hinged belt is not sticky to the hand; and carrying out in-situ cementing and curing to form a water-stable aggregate.

The invention discloses a calculation method and device for hot aggregate components and an asphalt station. The calculation accuracy of the hot aggregate components can be improved. The hot aggregate in the hot aggregate bin represents the aggregate formed by processing the cold aggregate based on the cold aggregate bin; the calculation method for the hot aggregate components comprises the steps that an equilibrium equation is established based on the accumulative feeding amount of a target hot aggregate bin, the accumulative consumption amount of the target hot aggregate bin and the real-time material level value of the target hot aggregate bin; on the basis of the correlation between the target working frequency of the cold material belt motor frequency converter and the accumulative feeding amount, in the balance equation, the accumulative feeding amount is replaced with a mathematical expression generated according to the target working frequency of the cold material belt motor frequency converter and the target coefficient; according to the working frequency of the target cold material belt motor frequency converter, the accumulated consumption of the target hot material bin and the real-time material level value of the target hot material bin, a target coefficient is calculated; and based on the target coefficient, calculating the proportion of the cold material components in the target hot material bin.

The invention belongs to but not limited to the technical field of asphalt-aggregate adhesion performance analysis, and discloses an asphalt oxidation functional group and aggregate adhesion action mechanism analysis method and system based on molecular dynamics, and the method comprises the following steps: constructing a multivariable oxidation functional group asphalt molecular model; constructing a refined silicon dioxide aggregate model; building a layered asphalt-aggregate interface system; carrying out geometric optimization, annealing treatment and dynamic simulation on the basis of Materials Studio software; and microscopic analysis of the adhesion performance is realized through interface energy calculation. The method has the remarkable advantages of being high in stability, high in universality, low in cost and the like, overcomes the defects of existing research on micromechanism analysis, and provides a new technical path for correlation research of asphalt aging and adhesion performance degradation.

This invention relates to the field of crushing equipment technology, specifically proposing a multi-stage crushing system for recycled aggregates based on the recycling of construction waste. The system includes a horizontal crushing chamber; two extrusion components arranged opposite each other inside the crushing chamber; a first drive mechanism for driving the two extrusion components to rotate, the first drive mechanism being mounted on the surface of the crushing chamber; and a second drive mechanism for driving the two extrusion components to move closer or further apart, the second drive mechanism being mounted on the surface of the crushing chamber. This invention, by setting two triangular prism-shaped extrusion components, the first drive mechanism, and the second drive mechanism, forms a combined rotary extrusion and variable-speed translational shearing motion, achieving seamless connection and parallel operation of crushing and shearing actions. This reduces material waiting and idling time between traditional multi-machine connections, and its overall processing efficiency is nearly 40% higher than that of traditional jaw crushers and shears.

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 invention relates to a slow-release anti-freezing aggregate based on steel slag modification and a preparation method thereof.The modified steel slag anti-freezing aggregate takes steel slag as a matrix, the content of free calcium oxide in the modified steel slag anti-freezing aggregate is lower than 2.0%, and an anti-freezing agent is loaded in a microporous structure of the modified steel slag anti-freezing aggregate; the aggregate is prepared from the following components in parts by mass: 90-100 parts of steel slag particles; 15-30 parts of an anti-freezing agent; 0.2 to 2 parts of a reaction accelerator; and 1-3 parts of a post-treatment agent. The method has the beneficial effects that the anti-freezing agent solution and the steel slag f-CaO are subjected to directional chemical reaction under the heating condition, so that the hidden danger of volume expansion is fundamentally eliminated, and meanwhile, high-capacity adsorption and crystallization storage of the anti-freezing agent are realized by virtue of inherent pores of the steel slag; the composite membrane formed in the post-treatment stage realizes slow and lasting release of the anti-freezing agent in an ice and snow environment by regulating and controlling the water permeation rate.

The application discloses a kind of light aggregate based on industrial solid waste and its preparation method, belong to the technical field of comprehensive recovery and resource utilization of arsenic-containing building (structure) waste materials.The light aggregate is made of building (structure) waste materials as main raw material, which is made by specific raw material formula and preparation process.The preparation method includes the steps of pretreatment, batching mixing, granulation, curing and the like of building (structure) waste materials.The light aggregate prepared by the application has excellent performance, can effectively solve the problem of arsenic-containing building (structure) waste material treatment, realize resource recycling, and has significant environmental and economic benefits.

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.

The invention discloses a cold-bonded artificial core-shell aggregate based on decoration waste regenerated sand powder and a preparation method thereof. The cold-bonded artificial core-shell aggregate with a core-shell structure is prepared from the decoration waste regenerated sand powder as a raw material through a cold-bonding granulation method, the inner core of the cold-bonded artificial core-shell aggregate is decoration waste regenerated sand, and the outer shell of the cold-bonded artificial core-shell aggregate is geopolymer gel formed by the decoration waste regenerated micro powder and blast furnace slag powder through an alkali excitation reaction by using an alkali activator; the decoration waste regenerated sand and the decoration waste regenerated micro powder are obtained by vibrating and screening decoration waste regenerated sand powder. According to the invention, resource utilization of solid waste is realized, and environmental pollution caused by random disposal of decoration garbage is reduced; high-temperature sintering is not needed in the cold-bonding granulation process of the artificial core-shell aggregate, so that the energy consumption and the cost are reduced; the regenerated micro powder and the blast furnace slag powder are fully excited, so that the mechanical property of the cementing material is remarkably improved, and a final product has higher durability and strength.

The invention relates to the technical field of recycled aggregate recovery, in particular to an intelligent recycled aggregate recovery system for building waste, which comprises a data acquisition module for acquiring image information and air injection pressure of a pneumatic nozzle, and a hierarchical control module comprising a target aggregate analysis unit for determining a plurality of parameters of a target aggregate, the path planning unit is used for determining a path planning mode of the target aggregate based on the linear distance between the initial position and the target position so as to plan an ideal motion path, determining a triggering time interval of the ideal motion path according to the classification level, and correcting the triggering time interval; the air injection pressure determining unit is used for determining and correcting the initial air injection pressure, and the sorting precision determining unit is used for determining the grading accuracy rate of the target aggregate according to the image information of the blanking process, determining whether the sorting process is qualified or not, and optimizing the path planning mode according to the grading deviation of the target aggregate. The grading precision of the recycled aggregate is improved.

The invention relates to the technical field of road engineering detection, in particular to a road aggregate wear resistance grading method and system based on surface contour characteristics, and the method comprises the steps: screening test aggregates according to a set particle size range, and placing the test aggregates in AIMS image scanning equipment; driving the tray to rotate at a fixed speed, obtaining a projection image of each test aggregate through backlight scanning, and calculating the angle based on the projection images; performing top-view optical scanning on the test aggregate of the same pose of the tray to obtain a surface microscopic image, and calculating the texture degree based on the surface microscopic image; counting an average value of the arithmetic values of the corner angles and the texture degrees of all the test aggregates, and obtaining grades of the test aggregates based on the average value of the arithmetic values; the A-grade aggregate is used for the surface layer of a highway, the B-grade aggregate is used for the surface layer of a first-grade highway or a second-grade highway, and the C-grade aggregate is used for the surface layer of a third- According to the invention, the problem that the existing road aggregate grading standard does not conform to the texture characteristics of the aggregate in China is effectively solved.

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 invention relates to the technical field of road engineering materials, in particular to a recycled aggregate based on a waste refractory material, a preparation method of the recycled aggregate and an anti-skid pavement, the recycled aggregate is prepared from the waste refractory material, and the waste refractory material is a high-alumina refractory material; the particle size of the regenerated aggregate is less than or equal to 9.5 mm, the angularity is greater than or equal to 3200 AIMS units, the Form2D index is greater than or equal to 7.5, the sphericity is 0.6-0.7, and the ratio of the flatness to the slenderness is greater than or equal to 2.5. The regenerated aggregate is derived from a waste refractory material, macroscopically regulated and controlled through aggregate particle size grading, meanwhile, the morphology of the regenerated aggregate is limited, the synergistic effect of the microstructure and the macroscopic structure of the aggregate is fully considered, and the high-performance regenerated aggregate is obtained through precise screening and serves as a natural raw material or a substitute aggregate of calcined bauxite; the recycled aggregate is used for the anti-skid surface layer, and the technical specification requirements of the anti-skid surface layer of highway engineering are met.

The application provides a kind of low-carbon aggregate based on solid waste and a preparation method, and belongs to the technical field of solid waste resource utilization, the low-carbon aggregate includes a solid waste layer and a stable layer and a pressure-bearing layer wrapped in the solid waste layer from inside to outside;The application designs the low-carbon aggregate into three layers, and strictly controls the thickness of each layer;The innermost layer is a solid waste layer, which uses a small amount of materials with hydration activity to preliminarily fix the waste slag;Then use steel slag, slag, desulfurization gypsum, etc.to prepare a stable layer with high density, which tightly wraps the waste slag, so that harmful elements cannot leach out;Finally, use silica fume, cement, steel slag, slag, desulfurization gypsum, etc.to prepare a pressure-bearing layer with high strength to provide strength for the low-carbon aggregate.