4227 results about "Cement" patented technology

The invention provides a solid waste filling material ratio optimization method of a magnesium slag-steel slag composite cementing material, and relates to the technical field of solid waste filling. The method comprises the following steps: mixing magnesium slag, steel slag, desulfurized gypsum and mineral slag to prepare a cementing material, and carrying out pretreatment and physicochemical property analysis on raw materials by taking tailings and waste rocks as filling aggregates; then designing a cementing material proportioning scheme and carrying out strength test to obtain an optimal ratio of the cementing material; then considering different slurry concentrations and plastic-to-bone ratios, and carrying out an all-solid waste filling slurry rheological test and an all-solid waste cementitious body strength test; and finally, according to the two test results, establishing a multi-objective optimization model taking the on-way resistance and the filling material cost as optimization objectives and taking the strengths of cementitious bodies at different ages as constraint conditions, and determining optimal parameters of the full-solid waste filling material. According to the invention, resource utilization of the metallurgical solid waste and the mine solid waste is realized, the bottlenecks of high carbon emission and high cost of a cement-based filling material are broken through, and a solution is provided for co-processing of the mine solid waste.

The invention relates to the technical field of engineering construction control, in particular to a self-adaptive control method and system for a cement mixing pile, and the method comprises the steps: setting the slurry preparation ratio parameter of a slurry preparation barrel of a feeding hopper according to the working information of the cement mixing pile, and conveying the prepared slurry to a slurry storage barrel of a discharging hopper; collecting a slurry static pressure signal of a slurry storage barrel of the blanking hopper, and monitoring the load dynamic characteristics of a stirring motor of the blanking hopper in real time in the stirring process; the slurry spraying quality parameters of the slurry are analyzed, and when the slurry spraying quality parameters reach the preset feeding standard, the slurry is conveyed to a slurry spraying pipeline to be matched with a cement mixing pile for pile forming work; when the guniting quality parameter exceeds the interval of the feeding standard, a real-time matching error is obtained; and generating a ratio correction instruction to correct the pulping ratio parameters. According to the invention, the dynamic closed-loop control of the pile forming quality of the cement mixing pile under the complex geological condition is effectively realized, and the industry bottleneck that the traditional open-loop proportioning system cannot respond to the slurry state change in real time is broken through.

To provide a concrete composition with a portion of aggregate thereof replaced with carbonate light aggregate, excellent in fresh characteristics and in post-curing strength and freeze damage resistance.SOLUTION: An aspect of the present invention relates to a concrete composition including (a) cement, (b) coarse aggregate, (c) fine aggregate, (d) granulated carbonate light aggregate of alkali earth metal, (e) and water, where the carbonate light aggregate has a cumulative pore volume of 0.06 mL / g or more, each pore having a pore size of 100 nm or less.SELECTED DRAWING: None

The invention belongs to the technical field of asphalt pavement construction, and discloses a municipal road reconstruction engineering asphalt pavement construction quality control method, which specifically comprises the following steps: 1, carrying out three-dimensional laser scanning surveying and mapping on longitudinal and transverse joints and crack distribution of an original cement concrete pavement in the treatment research of the original pavement; the geometrical morphology and modulus characteristics of an original pavement are accurately analyzed through three-dimensional laser scanning and a dynamic modulus test, the thickness design of an asphalt layer is optimized, adaptive materials are intelligently screened according to climate characteristics and traffic load grades of a construction area, and the performance stability of an asphalt mixture is improved; meanwhile, by means of the intelligent paving technology, the flatness and thickness uniformity of a paving layer are guaranteed, the paving temperature is accurately controlled, the paving performance of the mixture is improved, rolling parameters can be automatically adjusted according to key information such as the paving thickness and the temperature, and the uniformity of the compaction quality is improved.

The invention provides a low-carbon concrete coarse aggregate close packing combination grading formula and a determination method, and relates to the technical field of building materials, the formula comprises a coarse aggregate skeleton, a fine aggregate, a low-carbon cementing material, water and an admixture, the coarse aggregate skeleton is composed of four different size fractions, and the purpose is to achieve the closest packing to reduce the cement requirement and improve the cement quality. The low-carbon cementing material is composed of cement, a conventional low-carbon mineral admixture and a low-carbon composite mineral admixture, and the low-carbon composite mineral admixture comprises an active component A and a micro-filling component B. The determination method comprises the steps of system characterization and model establishment, slurry skeleton iterative collaborative optimization and formula determination. The porosity is reduced to the maximum extent by optimizing coarse aggregate grading, the cement consumption is greatly reduced, meanwhile, through the synergistic effect of the high-performance, high-proportion and low-carbon admixture, the working performance, physical and mechanical properties and durability of the concrete are ensured, carbon emission and material cost are remarkably reduced, industrial solid waste is effectively utilized, and the economic benefit is increased. And green low-carbon preparation of the concrete is realized.

The invention relates to the technical field of building materials, in particular to anti-crack mass concrete and a preparation method thereof, and the concrete is prepared from a gelling system, composite aggregate, a gradient functional additive and water according to a specific ratio. The preparation method is achieved through premixing, gradient stirring and gradient temperature control curing, the three-stage expansion effect of the compound expanding agent is utilized to be matched with the concrete shrinkage process, the hydration heat inhibitor is combined for reducing the temperature peak, basalt fiber is used for reinforcing, and the cracking risk is quantitatively evaluated, so that the 28-day restrained expansion rate of the concrete reaches 0.012% or above, the cracking risk coefficient is smaller than or equal to 0.7, and the concrete has the good crack resistance. The hydration heat peak value is reduced to 48 DEG C or below, and the cement is suitable for engineering of ultra-long structures, large-volume side walls and the like, has no harmful cracks within one year or above, has crack resistance and mechanical properties, and is wide in application prospect.

The invention relates to the technical field of mine solid waste treatment and carbon dioxide sealing and storage, and particularly discloses a system and a method for sealing and storing carbon dioxide by utilizing coal-based solid waste and mine water to prepare slurry. The system comprises a cement bin, a gangue bin, a coal ash bin, a gasified slag bin, a mine water storage tank, a stirring reaction kettle, a carbon dioxide storage tank, a slurry temporary storage tank, a vacuum pump and a slurry pump, and the stability and adsorption efficiency of carbon dioxide fixation are improved in the mode that coal-based solid waste, mine water and carbon dioxide are subjected to chemical reaction and physical adsorption; meanwhile, the prepared backfill slurry has high-strength anti-pressure ability, the stability of the backfilled underground goaf is better improved, further, coal-based solid waste and mine water are utilized for waste recycling, and the carbon dioxide storage cost is reduced.

The invention discloses a preparation method of a green high-performance industrial solid waste-based grouting material, and belongs to the field of industrial solid waste treatment and grouting reinforcement, and the preparation method comprises the following steps: performing dry mixing on red mud, slag, fly ash and cement which are dried and ground to specified fineness according to a preset proportion to obtain a uniform dry material; preparing a composite alkali activator from water glass and sodium hydroxide according to a molar ratio of 3: 1, premixing the composite alkali activator with water, and adding the dry material in batches to form wet slurry; and carrying out high-speed shearing and stirring on the wet slurry, and standing and curing to obtain the solid waste-based slurry which can be directly used for grouting. The method obviously improves the solid waste utilization rate, relieves the environmental pressure, and is suitable for related projects such as stratum settlement control, gushing water blocking, mine roadway broken rock mass supporting and underground cavity concrete lining crack repairing in tunnel and subway projects.

The invention relates to the technical field of tunnel engineering building materials, in particular to a double-slurry synchronous grouting material based on shield silty-fine sand and a preparation method of the double-slurry synchronous grouting material based on shield silty-fine sand. The liquid A is prepared from, by weight, 20%-30% of cement, 30%-50% of shield silty-fine sand, 5%-10% of bentonite, 5%-15% of mineral admixture, 0.1%-0.5% of stabilizer and 20%-30% of water, and the stabilizer is a water-soluble high-molecular polymer; the solution B is a water glass solution, and the volume ratio of the solution A to the solution B is (10-15): 1; the double-slurry synchronous grouting material further comprises a retarder and a coagulant, the retarder is citric acid, and the coagulant is a nano Ca (OH) 2 crystal nucleus. Bidirectional and gradient regulation and control of the gelation time between 5s and 100s can be realized through the coagulant and the retarder, and diversified requirements of different geological conditions and construction progress on slurry operation time are met.

The invention provides a real-time early warning method and system for ash conveying equipment, and the method comprises the steps: collecting the operation parameters of the ash conveying equipment in real time, including the material level of an ash hopper, the pressure of an ash conveying pipeline, the environment temperature and a pipeline vibration signal; performing dynamic weight fusion on the equipment operation parameters to generate a comprehensive working condition index; analyzing and predicting the change trend of the comprehensive working condition index based on the time sequence; when the change trend exceeds a preset safety range, generating a graded early warning signal and triggering a corresponding disposal instruction; according to the graded early warning signal, the parameter weight and the early warning rule of dynamic weight fusion are automatically optimized, the comprehensive working condition index is generated through coupling of various operating parameters, and then the change trend is predicted to carry out graded early warning, so that compared with a single parameter early warning mode, the accuracy of the fault early warning of the ash conveying equipment is effectively improved.

The invention relates to the field of hazardous waste treatment, in particular to a treatment method for mineralization and chlorine fixation of waste incineration fly ash and a waste incineration fly ash solidified body. The treatment method comprises the following steps that S1, the incineration fly ash is subjected to homogenization treatment, and homogenized fly ash is obtained; s2, the homogenized fly ash is detoxified through plasma treatment, dioxin on the surface of the homogenized fly ash is removed, and detoxified fly ash is obtained; and S3, stirring the detoxified fly ash, a mineralizing agent and water, carrying out shock excitation, carrying out pouring molding, standing, and demolding to obtain the waste incineration fly ash solidified body. According to the method, the incineration fly ash is dispersed through homogenization treatment, dioxin on the surface of the homogenized fly ash is removed through plasma treatment, finally, fly ash particles are tightly wrapped and cemented through cooperation of a mineralizing agent and water, a compact network structure is formed, the leaching toxicity of heavy metal is reduced, soluble chloride ions are chemically fixed in crystal lattices of minerals, and the leaching efficiency is improved. The incineration fly ash mineralization and synergistic chlorine fixation effects are realized.

The invention belongs to the technical field of pavement repairing, and discloses a material mixing and grouting integrated cement concrete pavement repairing device which comprises a frame, an adjusting assembly is arranged on the front face of the frame, a vibration assembly is arranged at the bottom of the adjusting assembly, and the vibration assembly comprises a fixing rod. According to the device, through cooperation of structures such as the vibration assembly and the supporting wheels, a knocking hammer of the vibration assembly is driven to knock a grouting area range in the moving process, mortar air injected into the device can be discharged through knocking vibration, and the device is convenient to use. According to the mortar filling device, mortar can permeate into gaps, filling uniformity is guaranteed, the vibration effect can be achieved through knocking, air of the mortar can be effectively emptied, meanwhile, the mortar can be prevented from overflowing, the flatness of the surface after the gaps are filled with the mortar can be guaranteed, and meanwhile grouting uniformity can be guaranteed.

The invention discloses a composite system geopolymer grouting material and a preparation method thereof. The composite system geopolymer grouting material comprises the following raw materials in percentage by mass: 50-70% of coal gangue, 10-30% of fly ash and 10-30% of cement. Functional additives: 5%-20% of desulfurized gypsum and 5%-15% of bentonite; the composite exciting agent is formed by compounding carbide slag and sodium silicate according to the mass ratio of 1: 1-1: 2. The geopolymer is excellent in mechanical property, meets engineering requirements, is remarkable in environmental protection benefit, conforms to double-carbon target low-carbon process innovation: a calcination-free process: traditional high-temperature calcination is abandoned (the temperature needs to be 550-900 DEG C), carbon emission is reduced by more than 30% (compared with a contrast, the carbon emission of a traditional process is increased by 35%), and the geopolymer conforms to the green positioning of low energy consumption and low three wastes of geopolymers. The cost advantage is prominent, the economic value is remarkable, the raw material cost is reduced, specifically, the coal gangue (low-cost solid waste) is used for replacing 30%-50% of cement, and the comprehensive raw material cost is reduced by 40% (compared with a traditional cement-based grouting material).

The invention provides aeolian sand mortar internally doped with aluminate coupling agent modified fly ash and a preparation method of the aeolian sand mortar. The aeolian sand mortar comprises the following raw materials by mass: 10-40g of modified fly ash; 60 to 90 g of cement; 300 to 350 g of aeolian sand; 45 to 55g of water; wherein the modified fly ash is prepared through wet modification of an aluminate coupling agent, and the preparation method of the modified fly ash comprises the following steps: mixing the aluminate coupling agent and absolute ethyl alcohol according to a mass ratio of 1: (3-5), heating, and stirring for the first time until a transparent solvent is formed; and adding the transparent solvent and fly ash into water together, stirring for the second time to form slurry, and drying to obtain the super-hydrophobic modified fly ash. Through innovative selection of internal doping materials and optimization of a preparation process, the mortar has excellent, lasting and stable hydrophobic performance, the anti-permeability, compressive strength, bonding strength and other performance of the mortar are remarkably improved, and the strict requirements of modern constructional engineering for high performance and long service life of the mortar are met.

The purpose of this invention is to provide a method for preparing cemented backfill materials based on response surface methodology using composite activating coal gasification slag. This method belongs to the field of mining engineering technology. Based on sorting and removing impurities from the coal gasification slag and drying it, the invention obtains ultrafine powder of the coal gasification slag for preparing the backfill material through ball milling. Then, coal gangue is crushed and screened using a crusher to obtain coarse, medium, and fine aggregates for the backfill material. Finally, cement, ultrafine coal gasification slag powder, coal gangue aggregate, activator, and water are mixed evenly to prepare the cemented backfill material. This invention not only solves the problem of low activity of coal gasification slag volcanic ash but also effectively controls the shortage of cemented backfill materials and high backfilling costs during cemented backfill mining, ensuring sustainable development. Furthermore, it effectively utilizes the widely accumulated coal gasification slag, reducing pollution and large-scale land occupation of the surrounding environment.

The invention discloses a cement wall prefabricating drilling device for building construction, and relates to the technical field of building construction equipment, the cement wall prefabricating drilling device for building construction comprises a supporting bottom plate and further comprises a first drilling mechanism, and the first drilling mechanism is located above the supporting bottom plate. Therefore, the first drilling operation table is driven to be adjusted in the overall direction, the drilling requirements of different directions are met, the equipment use flexibility of overall drilling operation is improved, and the device is suitable for various scenes. According to the drilling equipment, the driving adjusting mechanism is arranged, large particles cannot enter a fixing box, recycling treatment is conducted through a recycling box at the bottom, classified storage is conducted on equipment needed on site through a classified storage box, drilling modes of different states are switched according to drilling scene needs, and the drilling efficiency is improved. And meanwhile, the functions of storage of equipment required during drilling, field environment purification during drilling, field equipment movement and the like are integrated.

The invention relates to a filling cementing material as well as a preparation method and application thereof. The filling cementing material comprises blast furnace slag powder, fly ash, superfine tailing micropowder, an alkaline activator and a sulfate activator, the specific surface area of the superfine tailing micro powder is 600 to 800 m < 2 > / kg. The technical problem to be solved is how to provide the filling cementing material, the performance of the tailing micropowder can be activated to enhance the bonding effect of the filling cementing material, and the mechanical strength and the cementing effect of the filling cementing material are enhanced through the synergistic effect of the superfine tailing micropowder and other raw materials, so that not only is the industrial solid waste of the tailing treated, but also the economic benefit is improved. And cement is avoided, so that carbon reduction and environmental protection are facilitated.

The application belongs to the field of concrete, and discloses a low-carbon and environment-friendly ultra-high performance concrete and a preparation method thereof.The low-carbon and environment-friendly ultra-high performance concrete comprises the following raw materials in parts by weight: 13-23 parts of water, 50-70 parts of cement, 5-15 parts of silica ash, 100-138 parts of fine aggregate, 20-50 parts of quartz powder, 5-12 parts of reinforcing fiber, 1-5 parts of additive, 0-0.5 parts of calcium polyacrylate (CPA), and 0-0.2 parts of silane coupling agent.The low-carbon and environment-friendly ultra-high performance concrete provided by the application can greatly reduce the dosage of cement, silica ash and other cementitious materials and the dosage of fiber compared with traditional ultra-high performance concrete, but still maintains excellent mechanical properties and durability.

The invention discloses an intelligent maintenance system and method for a cement stabilized macadam base. The maintenance system comprises a monitoring module, an intelligent control module, maintenance equipment and a covering material, the monitoring module comprises a temperature and humidity sensor, a moisture evaporation sensor and an environment monitor; the intelligent control module comprises a data collector, a data processing unit and a controller; the maintenance equipment comprises a water tank, a water pump, pipelines and nozzles. The maintenance method adopts the maintenance system and further comprises the maintenance steps of data acquisition, data analysis and processing, maintenance decision and control and real-time monitoring and adjustment. The system has the beneficial effects that by monitoring the temperature, humidity, moisture evaporation rate and environmental parameters of the cement stabilized macadam base in real time and utilizing the data processing and control module to accurately calculate maintenance parameters, accurate maintenance of the base is achieved, uniform development of the strength of the base is ensured, generation of diseases such as cracks is effectively reduced, and the service life of a road is prolonged.

The invention discloses a cement-based telegraph pole defect detection method based on big data analysis, and the method comprises the steps: arranging a distributed optical fiber sensing network to collect the stress data of a target telegraph pole, and obtaining a stress feature set through denoising and feature extraction; constructing a structure damage feature library based on the attributes of the telegraph pole and the material characteristics, and screening key damage features through a self-adaptive matching threshold value; and in combination with concrete carbonization characteristics and steel bar corrosion characteristics, carrying out weighted analysis by adopting a multi-modal fusion model and an attention mechanism, and outputting an optimally matched defect detection result. According to the method, through multi-source data fusion and dynamic threshold optimization, the recognition precision of typical damages such as cracks and spalling is remarkably improved, a graded early warning and maintenance scheme can be automatically generated according to a detection result, and intelligent monitoring and operation and maintenance of the health state of the telegraph pole are achieved; the method has the characteristics of high detection accuracy and strong environmental adaptability, and is suitable for long-term safety monitoring of the electric power infrastructure.

The invention discloses a polymer emulsion composite modified road base material and a preparation method thereof, and belongs to the technical field of traffic infrastructure engineering materials. The polymer emulsion composite modified road base material is prepared from the following raw materials: graded aggregate, super sulfate cement or geopolymer cement, water for mixing, vinyl acetate-ethylene (VAE) copolymer emulsion and a silane coupling agent. The preparation method comprises the following steps: mixing the VAE emulsion with water for mixing to obtain a polymer diluent; mixing graded aggregate with an inorganic cementing material, then adding the polymer diluent, and mixing to obtain a mixture; and then paving, compacting, forming and curing are carried out. By forming a VAE flexible network-C-S-H / ettringite hybrid network, the material has the remarkable advantages of higher mechanical strength and low cost, and can greatly improve and enhance the crack resistance and durability of the road base.

The invention relates to the technical field of mine filling materials, and particularly discloses an all-solid-waste mine filling cementing material as well as a preparation method and application thereof. The mine filling cementing material is prepared by using the solid waste component and the auxiliary agent, in the solid waste component, the red mud and the steel slag are jointly used as an alkali source, the manganese slag and the mineral slag are jointly used as a high-activity silicon-aluminum material, and in addition, the filling agent component is also added. Under the synergistic effect of the alkali source, the industrial gypsum waste residues, the filling agent and the high-activity silicon-aluminum material, the full-solid-waste mine filling cementing material can have high strength and can be used as an ideal substitute of a cement-based grouting material, and due to the fact that solid waste components can be directly taken from stockpiled solid waste, the production cost is extremely low, and the full-solid-waste mine filling cementing material is suitable for industrial production. And a good underground filling effect can be achieved under the condition that the cost is reduced.

This invention discloses a heat-insulating and heat-resistant shotcrete and its preparation method. This heat-insulating and heat-resistant shotcrete is composed of cement, modified silica mortar, modified heat-insulating ceramsite, fine aggregate, water, admixtures, and accelerators. In this invention, high-strength shale ceramsite with surface modification using hydrogel is introduced as a heat-insulating filler, significantly improving the dispersion and stability of lightweight aggregate in the mortar. It also possesses strong water absorption and slow-release capabilities and surface sealing functions, enabling it to provide pore insulation and internal curing through water storage and release in high-temperature environments. The addition of modified silica mortar, which effectively improves the high-temperature stability and density of the mortar hydration products, comprehensively enhances the homogeneity of the shotcrete mixture, the heat insulation performance of the hardened body, and the strength development and durability under high-temperature conditions. This effectively improves tunnel chamber temperature and extends the service life of the shotcrete under high-temperature conditions. The heat-insulating and heat-resistant shotcrete technology has a clear working mechanism, simple production process, and excellent performance. It is suitable for large-scale production and is of great significance for the high-quality construction of underground projects such as tunnels and mines in high-temperature and high-temperature water inrush environments.

The invention discloses an anti-sulfate-attack preparation method of solid waste concrete, and relates to the technical field of building materials and civil engineering, the anti-sulfate-attack solid waste concrete is prepared from the following materials in parts by weight: 100 parts of cement, 30-50 parts of composite solid waste cementing material, fly ash, steel slag micro powder and coal gangue according to a given mass ratio, 60-80 parts of modified recycled aggregate; 0.05-0.1 wt% of sodium molybdate as an erosion inhibitor. According to the invention, solid waste activation-interface reconstruction-ion competition-structure self-healing is taken as a core, synchronous spanning of solid waste concrete in the dimensions of sulfate erosion resistance, resource consumption, construction convenience and the like is realized through multi-process collaboration, and the gelation potential of solid wastes such as fly ash and steel slag is accurately excited through microwave targeted activation, so that the construction efficiency is improved. And a dense microstructure is reconstructed by combining a nano-SiO2 induced crystallization technology, so that excellent mechanical properties are still ensured when the solid waste mixing amount exceeds 70%.

This invention relates to the field of novel low-carbon composite cement and solid waste resource utilization technology, specifically to a red mud-based low-carbon composite cement and its preparation method. The raw materials for this red mud-based low-carbon composite cement include red mud, auxiliary cementitious materials, gypsum-based solid waste, alkali activator, retarder, and interface reinforcing agent. It possesses compressive strength comparable to or even higher than 425 or 525 cement, with a red mud content ≥30wt% and an alkali activator content as low as 3wt%–8wt%. This not only achieves large-scale resource utilization of red mud but also significantly reduces production costs. Simultaneously, the cement hydration products have a good shielding effect against radioactivity, ensuring that the radioactivity of the hardened cement still meets national standards even with the large-scale incorporation of red mud. Moreover, the preparation method of this cement is simple, requiring neither red mud dealkalization nor high-temperature calcination, truly achieving low-carbon, low-energy-consumption, and low-cost green and environmentally friendly cement production.

The invention relates to the technical field of concrete construction, in particular to a green low-carbon concrete construction operation device which comprises a vehicle body, a stirring tank is fixedly mounted on one side of the upper end of the vehicle body, a feeding cylinder is fixedly mounted on one side of the upper end of the stirring tank, and a feeding hopper is fixedly mounted at the upper end of the feeding cylinder. A first motor is started to drive a crushing roller and a rotating roller to rotate, the crushing roller crushes stones, the crushed stones fall at the upper end of an inclined plate, the rotating roller evenly throws the crushed stones to the upper end of a sieve plate, the stones are filtered, and the matched stone fragments fall into a stirring tank and are mixed with additives such as cement and sand to form concrete. Then a valve on the discharging pipe is opened, the vehicle body is pulled towards the concrete outlet side, the pressing cylinder rotates while moving up and down on the concrete, the surface of the concrete is vibrated to be flat, the concrete surface is leveled through the patter and the leveling plate, secondary leveling of workers is not needed, the labor intensity is reduced, and the efficiency is improved.

The invention discloses an inorganic normal-temperature rapid-hardening coal-rock mass reinforcing and filling material, and relates to the technical field of mine reinforcement. The material comprises a liquid A and a liquid B, the liquid A is prepared from cement, fly ash, magnetic nano silicon dioxide, citric acid and a layered bimetal oxide-sodium hexametaphosphate compound; and the liquid B comprises water glass, superfine limestone and water. During use, the liquid A and the liquid B are mixed according to the volume ratio of 1: 1 and injected into a target area, and a 1.5 Tesla magnetic field is applied at the initial stage of grouting until the grout is initially set. Through the synergistic effect of the compound protection dispersing agent, the magnetic particles and an external magnetic field, the technical problems that an existing material is unstable in performance due to temperature change, nanoparticles are prone to agglomeration, and magnetic response is attenuated in an alkaline environment are effectively solved; the technical effects of rapid solidification, high strength and excellent durability in high-temperature, low-temperature and complex mine environments are achieved.

The present invention relates to the technical field of supersulfate cement, and specifically discloses a calcium fluoroaluminate-modified high-stability supersulfate cement and its application. The raw materials of the supersulfate cement include the following components: 70-80 parts by weight of mineral powder, 10-15 parts by weight of gypsum, 5-10 parts by weight of calcium fluoroaluminate, and 1-2 parts by weight of modified diatomaceous earth. The modified diatomaceous earth is porous diatomaceous earth microspheres loaded with L-aspartic acid. The present invention utilizes the synergistic effect of the calcium fluoroaluminate and the modified diatomaceous earth to not only improve the early strength of the supersulfate cement, but also effectively improve the chemical stability of the hydration product ettringite (AFt), thereby improving the carbonation resistance of the supersulfate cement and alleviating the problem of long-term strength shrinkage.

This invention discloses a continuous, high-efficiency, automatic dry-mixed mortar preparation equipment, relating to the field of mortar preparation technology. It includes a sand drying device and a feeding hopper. A sand particle screen is installed on one side of the sand drying device, and a screw conveyor connects the sand drying device and the sand particle screen. The dried sand enters the sand particle screen via the screw conveyor. Under the action of a first and second uniform material assembly, the mortar on the first conveyor belt consists of coarse sand, fine sand, cement, and filler laid out in sequence. Because the fine sand can fill the gaps in the coarse sand, reducing the relative movement space of the coarse sand and increasing internal friction, the cement and filler can be positioned on top of the coarse and fine sand. The dry-mixed mortar is stacked in a layered structure in a packaging bag using an anti-segregation telescopic tube, reducing stratification during bagging and transportation after mortar preparation, and reducing the mixing time between the mortar and water in the later stages.

The invention provides a preparation method of a composite curing agent based on industrial solid waste. The method comprises the step of mixing slag powder, fly ash, carbide slag and cement. The invention further provides application of the composite curing agent based on the industrial solid waste for curing the phyllite filler, and the improved phyllite filler is prepared and serves as highway subgrade filler. According to the method, resource utilization of the waste rock-soil body is achieved, pollution damage of the waste rock-soil body and solid waste emission to the environment is avoided, solid waste materials are fully utilized, the environment is protected, and mineral resources are saved.