94 results about "Aggregate base" patented technology

The invention discloses a quantitative evaluation method for the adhesion of aggregate based on a water boiling method, and aims to solve the technical problem that the adhesion performance of asphalt and aggregate tested by the water boiling method can only be evaluated qualitatively and cannot be quantified. The quantitative evaluation method comprises the following steps: 1, carrying out a water boiling test on the adhesion performance of the asphalt and the aggregate by adopting a water boiling method; 2, shooting by adopting an industrial camera to respectively obtain images of four side surfaces coated with the asphalt aggregate and images of four side surfaces of the boiled asphalt aggregate; 3, unifying the background color of the side image, and then eliminating a reflective area on the surface of the aggregate through a two-stage reflective removal method to obtain a reflective-removed aggregate image; and 4, calculating the asphalt peeling rate on the surface of the aggregate by calculating the areas of the four side surfaces of the aggregate and the asphalt peeling area. According to the method, the boiling method and the image processing method are combined, the highlight area of the image is eliminated through the light reflection removing algorithm, the asphalt peeling area can be accurately calculated through the image method, and therefore the adhesion grade of the aggregate can be accurately judged.

The concrete aggregate based on the modified coal gangue is prepared from the following components in parts by weight: 35 to 40 parts of slag, 5 to 9 parts of nano aluminum oxide, 80 to 100 parts of red mud, 10 to 20 parts of fly ash, 80 to 100 parts of the modified coal gangue and 10 to 15 parts of hybrid fiber. The concrete aggregate based on the modified coal gangue has better strength, so that the mechanical property of concrete is improved.

The invention discloses a method for detecting softening resistance, chlorine salt erosion resistance and frost heaving resistance of aggregate, and relates to the field of performance detection of aggregate for pavement engineering, and the method comprises the following steps: obtaining image information of the preprocessed aggregate, carrying out partition processing on the image information by using an image partition processing technology, and obtaining a classification result of the aggregate according to a processing result; carrying out interval sampling on the aggregate based on the classification result, and carrying out identification analysis on the aggregate in combination with a directional tracking algorithm to obtain a grading result of the aggregate; carrying out softening resistance, chlorine salt erosion resistance and frost heaving performance tests on the aggregate, and summarizing the relationship between the aggregate color and the mass loss to obtain the mass loss result of the aggregate; and performing product performance fitting operation on the aggregate to evaluate the aggregate use performance satisfaction degree under the condition of a corresponding quality loss result so as to optimize the aggregate pretreatment process. According to the invention, softening resistance, chlorine salt erosion resistance and frost heaving performance tests are carried out on the aggregate to obtain the mass loss result of the aggregate, and the quality problem can be identified in advance.

The invention relates to the field of building materials, in particular to a recycled lightweight aggregate concrete wallboard production process optimization method and system.The method comprises the steps that a building solid waste set and a carbonization box are obtained, crack scanning analysis is conducted on solid waste samples, a recycled concrete set is obtained, the recycled concrete set is crushed and cleaned, initial aggregate is obtained, n comprehensive test groups are obtained, and n is a positive integer; carrying out carbonization analysis on the aggregate sample based on the comprehensive test group and the carbonization box to obtain a sample carbonization value, taking the comprehensive test group corresponding to the maximum sample value as an optimal test group, carrying out carbonization treatment on the initial aggregate based on the optimal test group and the carbonization box, carrying out water absorption performance test on the recycled aggregate, and calculating the addition amount of the recycled aggregate. And obtaining a target concrete wallboard based on the recycled aggregate addition amount and the recycled aggregate, and completing production process optimization of the concrete wallboard. According to the invention, the automation degree of recycling the lightweight aggregate can be improved, and the product quality of the finally produced concrete wallboard is improved.

The invention relates to the technical field of road engineering, and discloses a construction waste regenerated mixed aggregate grading determination method which comprises the following steps: step 1, construction waste pretreatment and crushing parameter acquisition; the method comprises the following steps: S1, carrying out multi-stage crushing on the construction waste through combined operation of a jaw crusher and an impact crusher, collecting a crushed particle size distribution curve of recycled aggregate, and measuring the proportion of needle-sheet-shaped particles and surface roughness parameters; and S2, metal and light impurities are separated through magnetic separation and winnowing equipment, and it is ensured that the metal residual rate is smaller than 1%, and the wood / plastic residual rate is smaller than 3%. According to the construction waste recycled mixed aggregate grading determination method, a recycled aggregate dynamic grading model is established on the basis of the crushing fractal rule and the maximum compactness theory, grading design precision is remarkably improved, it is ensured that the performance of a mixture is equivalent to that of natural aggregate, and a construction waste resource utilization path is optimized through a grading replacement strategy.

The invention relates to the technical field of mortar, and provides a rheological parameter prediction method and system for mortar prepared from hole slag, and the method comprises the steps: obtaining the physical characteristics of hole slag aggregate, the basic data of a close packing test and the net slurry yield stress; according to the physical characteristics of the hole slag aggregate and the basic data of the close packing test, the close packing compactness of the subsea tunnel hole slag aggregate is obtained through calculation; predicting the yield stress of the mortar prepared from the hole slag aggregate under different mixing amounts based on the neat paste yield stress and the close packing compactness of the subsea tunnel hole slag aggregate; taking the predicted ratio of the yield stress of the mortar to the yield stress of the neat paste as the relative yield stress, and adjusting and optimizing the rheological property of the mortar according to the relative yield stress. By researching the relative yield stress of the mortar prepared from the hole slag aggregate, dynamic prediction and rapid optimization of the rheological property of the mortar prepared from the subsea tunnel hole slag aggregate are realized.

The invention relates to an aggregate-adding construction method for cement soil spiral stirring pile construction, which comprises the following steps: acquiring a construction stratum type, determining a construction scheme according to the construction stratum type and preset engineering requirements, and setting equipment parameters according to the construction scheme; acquiring physical characteristics of the aggregate, determining the putting amount of the aggregate according to the physical characteristics of the aggregate, and adding the aggregate based on the putting amount of the aggregate; an equipment starting instruction is generated based on the equipment parameters, a drilling tool is controlled to stir aggregate and cement soil according to the equipment starting instruction, stratum feedback data is monitored in real time, and the rotating speed and the descending speed of a drilling rod are dynamically adjusted; and according to a preset construction period, the compactness and the mechanical property of the pile body are obtained, and quality evaluation is conducted on the compactness and the mechanical property of the pile body through the nondestructive testing technology. The device has the effect of improving the aggregate adding quality in the cement soil spiral stirring pile construction.

The invention relates to the technical field of recycled building materials, and discloses recycled environment-friendly aggregate based on construction waste and a preparation method of the recycled environment-friendly aggregate. The preparation method comprises the following steps: crushing, screening and cleaning waste concrete to obtain pretreated recycled aggregate, adding nano silicon dioxide into a modified acrylate emulsion, carrying out ultrasonic dispersion to obtain a composite emulsion, adding the composite emulsion into the pretreated recycled aggregate, stirring, mixing, airing and drying to obtain the recycled environment-friendly aggregate based on the construction waste. Nitrogen atoms in imidazole groups and pyrrole groups form hydrogen bonds with hydroxyl groups on the surface of the aggregate, so that the mechanical property of the aggregate is improved; silane groups react with hydroxyl groups on the surface of the aggregate to form a hydrophobic membrane to block water molecule permeation and reduce the water absorption rate; the sulfonate radical can form a stable calcium sulfonate compound with calcium ions in a cement hydration product, so that the chemical bonding of the aggregate and a cement matrix is enhanced; the introduction of the fluorine-containing monomer can improve the hydrophobicity of the modified polyacrylate emulsion after film formation, so that the water absorption rate is reduced.

The invention discloses a concrete grout bone ratio evaluation method based on aggregate contour extraction, which comprises the following steps: adding a dyeing pigment in a concrete cement and gravel stirring process for dyeing to obtain a dyed and molded concrete test block; cutting the plurality of dyed and formed concrete test blocks to obtain a plurality of sectioning planes of the concrete test blocks; acquiring section cutting plane images of the plurality of concrete test blocks through a camera; processing the section cutting plane images of the plurality of concrete test blocks, and extracting the contour features of the aggregate from the section cutting plane images of the plurality of concrete test blocks; calculating the area of the corresponding aggregate based on aggregate contour features extracted from the section cutting plane images of the plurality of concrete test blocks; and equivalently calculating a three-dimensional outline according to two-dimensional outline characteristics by combining the area of the aggregate in the section cutting plane images of the plurality of concrete test blocks, and solving the slurry-to-bone ratio of the concrete. According to the method, the slurry-to-bone ratio of the concrete can be efficiently evaluated, and high-cost industrial CT equipment does not need to be matched in the process.

The present invention relates to the technical field of high-rise building disassembly, and more particularly to an intelligent disassembly system for high-rise buildings, comprising: a temporary support frame, a data acquisition module, and a disassembly control module. The disassembly control module includes a region division unit for dividing a plurality of disassembly areas into preset sizes, determining the distribution uniformity of wall concrete aggregates based on wave velocity differences, adjusting the preset sizes based on the volume ratio of angular aggregates in the disassembly areas, a region optimization unit for re-dividing the remaining disassembly areas of the remaining wall based on exposed reinforcement lengths, determining a disassembly sequence based on ascending stirrup density corresponding to the plurality of disassembly areas, a sequence determination unit for optimizing the disassembly sequence based on the deformation form of the reinforcement nodes, and a support control unit for determining a depth adjustment coefficient based on the crack propagation rate on the wall surface and optimizing the depth adjustment coefficient based on the deformation angle of the support rod. The present invention improves the disassembly safety of high-rise building walls.

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 water-stable granules based on a gobi material base material and a preparation process of the water-stable granules. The preparation process comprises the following steps: providing a gobi material; respectively preparing a cement group, a permeation adhesive agent and a buffering agent; mixing and stirring a permeation adhesive agent, a buffering agent, an expanding agent and a retarder to obtain an additive; a cement group, an additive and a gobi material are mixed and stirred to obtain the water-stable granular material based on the gobi material base material, the permeation adhesive agent is adopted, permeation of the water-stable granular material based on the gobi material base material in soil is effectively enhanced, the cohesiveness between a foundation and the surrounding soil is enhanced, and the water-stable granular material based on the gobi material base material is improved. According to the water-stable aggregate based on the gobi material base material, the effect of reducing settlement and deformation of a foundation as much as possible is achieved, good hardness, toughness and elasticity are provided for the water-stable aggregate based on the gobi material base material by adopting the buffering agent, and damage to the surface of the foundation caused by smashing and falling of building materials and driving of engineering trucks can be reduced as much as possible in the construction process of a construction party after the foundation is built.

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.

The present invention relates to the technical field of construction aggregate preparation, specifically to a gradient crushing device for preparing construction aggregate based on low-grade tailings iron, comprising a crushing mechanism and a gradient mechanism, wherein the gradient mechanism is arranged inside the crushing mechanism, and the crushing mechanism comprises a transmission component, a guide component, a temporary storage component, a refinement component, a screening component and a crushing component, wherein the guide component is fixedly connected to the inner side of the transmission component, the temporary storage component is fixedly connected to the top of the inner side of the transmission component, the refinement component is fixedly connected to the surface of the temporary storage component, the screening component is fixedly connected to the front side of the temporary storage component, and the crushing component is arranged on the surface of the temporary storage component. The present invention provides a gradient crushing device for preparing construction aggregate based on low-grade tailings iron, which has a structure for gradient crushing of low-grade tailings iron, so that low-grade tailings iron can be gradient crushed, thereby improving the efficiency advantage of crushing low-grade tailings iron.

The present invention discloses a method, computer equipment and storage medium for designing the gradation of coarse aggregate of asphalt mixture based on microscopic mechanical properties, and relates to the field of asphalt mixture. The design method comprises: constructing a stacking model; the stacking model comprises a second rigid wall arranged at the radial periphery; the second rigid wall is replaced by a flexible confining pressure wall, and a three-dimensional discrete element model is obtained by servo; the flexible confining pressure wall comprises a plurality of spherical particles that can transmit pressure in the radial direction; a preset radial load and a preset axial load are applied, and the normal contact force, tangential contact force, normal vector, tangential vector and branch vector of each contact are extracted; the principal axis anisotropy coefficient is constructed; the optimal gradation of each level of coarse aggregate is determined according to the relationship between the principal axis anisotropy coefficient of the second coarse aggregate assembly and its axial strain under the preset axial load and radial load. The present invention solves the problem of poor correlation between the volume design method and road performance, and the designed gradation has excellent mechanical properties.

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 discloses a recycled aggregate strengthening method based on synergistic carbonization of household garbage incineration fly ash, which comprises the following steps: mixing and stirring the household garbage incineration fly ash and a certain proportion of water, and centrifuging to obtain washed fly ash centrifugate and filter residue; performing soaking treatment on the dried recycled aggregate by adopting centrifugate, and performing carbon dioxide carbonization on the recycled aggregate soaked in the centrifugate to obtain reinforced recycled aggregate; and soaking and carbonizing the recycled aggregate for multiple times to complete all reinforcement processes of the recycled aggregate. The technical performance of the recycled aggregate is improved, the problem that the heavy metal content of the household garbage incineration fly ash is too high is solved, and permanent storage of carbon dioxide is achieved. The method effectively promotes harmlessness and recycling of the incineration fly ash of the construction wastes and the household wastes, realizes treatment of wastes with wastes, realizes three-effect synergism, and has remarkable environmental and economic benefits.

The invention discloses an asphalt mixture mix proportion design method based on machine vision, and the method comprises the following steps: obtaining a target asphalt mixture raw material component type, the asphalt mixture raw material components comprise aggregate, asphalt and filler; determining the covering thickness of the corresponding asphalt on the aggregate according to the target asphalt mixture; acquiring three-dimensional image data of the aggregate according to the scanning equipment, establishing a surface model of the aggregate according to the three-dimensional image data, and determining the asphalt volume required by the aggregate in the target asphalt mixture according to the surface model of the aggregate and the covering thickness on the aggregate; obtaining the asphalt volume required by the filler in the target asphalt mixture according to the critical filler concentration; and adding the asphalt volume required by the aggregate in the target asphalt mixture and the asphalt volume required by the filler in the target asphalt mixture to obtain the total volume dosage of the asphalt in the target asphalt mixture. The invention aims to realize high-efficiency determination of the mix proportion of each component in the target asphalt mixture.

The invention relates to the technical field of construction waste reutilization, and discloses a trench-based recycled fine aggregate vibration watertight backfill construction method which specifically comprises the following steps: S11, calculating the backfill size of a foundation pit according to the engineering quantity and a construction drawing, setting out the filling range of recycled backfill materials, and setting out the filling range of the recycled backfill materials; a marking pen is used for marking transverse scale marks at the obvious positions of the two sides and the middle of the pipeline according to scales of the ruler, and numerical values are indicated from bottom to top; s12, sludge and accumulated water in the groove are cleaned, sundries and materials which are not suitable for filling are removed from the base, no garbage and no topsoil are achieved, and supporting structures are arranged on the two sides of the foundation pit; and S13, a drainage blind ditch is formed in the lower portion of the foundation pit, the bottom of the foundation pit is filled with broken stone, and the particle size of the used broken stone is 20-30 mm. The vibration watertight technology is adopted, the construction effect is obvious, meanwhile, the maximum layering thickness can reach 1.5 m, the specified requirements of current specifications are greatly broken through, the construction efficiency and the construction quality are improved, and recycling of regenerated fine aggregate is achieved.

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 a recycled aggregate preparation device and method based on iron tailing sand and industrial multi-source solid waste, and belongs to the technical field of recycled aggregate preparation. Pyrolysis gas generated in the pyrolysis regeneration process of waste activated carbon is conveyed by a gas conveying unit and enters a cyclone separator together with the iron tailing sand; primary activation of the iron tailing sand is achieved while gas-solid separation operation of pyrolysis gas is completed, then particle solid waste is wrapped with a pyrolysis regeneration product through wrapping slurry prepared from the pyrolysis regeneration product and a gelling material, and then the particle solid waste and the iron tailing sand subjected to primary activation treatment are dispersed in a dispersion cavity through a dispersion assembly; the preparation of the recycled aggregate is completed while secondary activation of the iron tailing powder is achieved, the finally prepared recycled aggregate has a better activity index through the gradient activation mode, the preparation efficiency of the recycled aggregate is high, and the application prospect is good.

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.