39results about How to "Improve water stability" patented technology

The invention relates to the technical field of recycled asphalt, in particular to a high-consumption RAP fine aggregate recycled asphalt mixture and a preparation method thereof.The high-consumption RAP fine aggregate recycled asphalt mixture is prepared from, by weight, 30-50 parts of RAP fine aggregate, 10-30 parts of RAP coarse aggregate, 25-30 parts of new coarse aggregate, 4-5.2 parts of matrix asphalt, 3-5 parts of cold additive recycled rubber cement, 3-5 parts of mineral powder and 0.2-0.26 part of warm mixing agent. When the total doping amount of the RAP is 60%, the proportion of the fine materials in the total RAP is larger than or equal to 50%, the fine materials can be stably doped, the discarding rate and energy consumption of the fine materials are remarkably reduced, and the RAP fine materials can be consumed in a high proportion.

This application relates to the field of road engineering materials technology, and discloses a method for preparing modified phosphogypsum base material for road engineering, comprising the following steps: mixing aged phosphogypsum with ferrous sulfate heptahydrate, sodium fluorosilicate, and manganese sulfate monohydrate, utilizing the inherent moisture of the phosphogypsum to dissolve the salts and form an acidic slurry; adding heat-curing dry powder and high-speed shearing, utilizing the heat of hydration to raise the temperature to 65℃-85℃ to create a high-temperature strong alkaline environment, initiating manganese catalytic oxidation and slag thermal etching; subsequently, high-pressure injection of a rapid cooling conditioning liquid, utilizing the latent heat of vaporization to rapidly cool to below 45℃ to complete rapid cooling quenching and slow setting locking; unloading and aging to obtain the modified phosphogypsum base material. This invention, through the release of chemical energy by quicklime hydration to construct a high-temperature strong alkaline reaction field, achieves deep mineralization of impurities and reconstruction of the cementitious material network, significantly improving the water stability and mechanical properties of the base material.

This invention relates to the field of polymer materials technology, specifically disclosing a flame-retardant thermoplastic elastomer compound and its preparation method. The flame-retardant thermoplastic elastomer compound comprises 50-80 parts SEBS, 10-30 parts PP, 5-15 parts compatibilizer, 10-30 parts composite flame retardant, 3-10 parts plasticizer, 0.2-1 parts antioxidant, and 0.1-0.5 parts lubricant. The composite flame retardant is prepared by reacting and mixing an intumescent flame retardant, barium metaphosphate, boron nitride, triallyl isocyanurate, and SEBS. The flame-retardant thermoplastic elastomer compound of this application possesses good flame retardancy, mechanical properties, and water resistance stability.

The utility model discloses a building integrated photovoltaics (BIPV) guide rail type water guide groove connecting structure and a water guide assembly, the connecting structure comprises a supporting groove and a limiting piece, the limiting piece is located on the inner bottom wall of the supporting groove and longitudinally extends along the supporting groove, the cross section of the limiting piece is T-shaped, the limiting piece is used for being embedded with a guide groove in the outer bottom wall of the water guide groove, and the two ends of the supporting groove are open. The supporting groove is used for being inserted into the ends of the two water guiding grooves, the inner wall of the supporting groove can be attached to the outer walls of the water guiding grooves, first flat edges are arranged at openings in the two sides of the supporting groove, second flat edges are arranged at openings in the two sides of the water guiding grooves, the first flat edges are attached to the second flat edges, and locking pieces are arranged on the first flat edges and the second flat edges. The connecting structure is used for limiting the relative displacement of the supporting groove and the water guiding groove in the longitudinal direction and is good in waterproofness, good in wind uplift resistance and easy to install. The water guide assembly has long-acting water resistance and structural stability in a complex environment, and is simple in structure, convenient to disassemble and assemble, convenient to machine, low in material consumption and large in water guide amount.

The invention belongs to the field of recycling of precious metal resources in environmental engineering, and particularly relates to a preparation method and application of an organic polymer sphere adsorbent. The amidoxime modified self-polymerized microporous polymer (AO-PIM-1) is prepared into the spherical adsorbent through a phase inversion method, and compared with other traditional adsorbents, the polymer sphere adsorbent is high in specific surface area and good in thermal stability and water stability and has a large number of functional groups with high combining capacity for Au ions. In a low-concentration Au solution, a good adsorption effect and excellent adsorption selectivity are still kept, and Au ions in electronic waste leachate can be well adsorbed and recycled.

This utility model discloses a netting lifting system, including a netting rack end face. Each of the four corners of the netting rack end face is equipped with a traction execution module. The inner side of each traction execution module is provided with a traction limiting guide rail, a transmission end connecting unit, and opposing limiting pillars. The traction limiting guide rail is used to slide and limit the vertical lifting of the traction execution module. The netting rack support module is connected to a breeding platform, and the transmission end connecting unit is connected to the platform's traction end, providing power transmission for the vertical lifting of the traction execution module. The symmetrical arrangement of the traction limiting guide rail and the opposing limiting pillars forms a rigid track, allowing the directional roller transmission component to have fitting guide cavities on both sides that strictly engage with the pillars, forcibly limiting its sliding only in the vertical direction. This greatly restricts the horizontal degree of freedom, ensuring that the lifting process strictly follows a vertical path, reducing swaying and deviation, and improving the overall stability after lifting and adjusting.

The application discloses a kind of based on multiple-source solid waste's improved red sandstone roadbed filler and mix proportion optimization method, belong to the field of red sandstone filler green low carbon improvement.Improved red sandstone roadbed filler is red sandstone as improved matrix, with match calcium carbide slag, rice husk ash, fly ash as cementing component preparation, wherein calcium carbide slag provides calcium source and alkaline environment, rice husk ash provides silicon source, fly ash provides aluminum source, three reactions occur in alkaline environment and generate abundant cementing products, realize red sandstone improvement.At the same time, with three cementing component contents as design variable, with bearing ratio, unconfined compressive strength, water stability coefficient as road evaluation index, construct road performance response model, through multi-index optimization, clear cementing component optimization ratio range.The method can exert the synergistic effect of multiple-source solid waste chemical composition, can be optimized according to different application scene performance requirements Ratio, realize red sandstone efficient improvement and multiple-source solid waste high-value utilization, with economic benefit and environmental benefit.

The application relates to the technical field of waste gas treatment, in particular to an antimony ingot production waste gas treatment system which comprises a cooling unit, a dust removal unit and an adsorption unit; the adsorption unit comprises a first adsorption unit and a second adsorption unit; the first adsorption unit reduces the SO2 content in waste gas through a sodium alkali method to obtain low SO2 concentration waste gas; the second adsorption unit processes the low SO2 concentration waste gas through an ultracrosslinked porous ionic polymer to obtain purified waste gas; after being processed by the system, the SO2 content in the waste gas is less than or equal to 50 mg / m 3 , which meets the waste gas emission standard.

This invention discloses a perovskite solar cell based on an organically modified lithium salt-doped hole transport layer. Organic molecules containing at least two electron-donating groups are directly introduced into the lithium salt-doped hole transport layer and spin-coated onto the perovskite film surface in a one-step deposition process. By strictly controlling the amount of organic molecules added, the spin-coating speed, and the spin-coating time in the lithium salt-doped hole transport layer, the overall modification and optimization of the perovskite solar cell device is achieved. This results in a dual effect of reducing film defects and improving the water stability of the lithium salt-doped hole transport layer, thereby enhancing the photoelectric conversion efficiency and stability of the perovskite solar cell. Furthermore, this invention combines the deposition of the passivation layer and the hole transport layer, significantly reducing the construction steps of the perovskite solar cell, lowering manufacturing costs, and offering a simple, effective, and reproducible fabrication process.

The application discloses a kind of textile fabric printing and dyeing wastewater dynamic multistage depth processing system, and the application relates to wastewater treatment technical field, including reaction tank and control module, the sidewall of the reaction tank is provided with aeration assembly, the aeration assembly includes several vice gas pipes arranged in the lower side of reaction tank interior, several aeration holes are formed in the vice gas pipe for gas supply to reaction tank interior, the upper side of the reaction tank is provided with partition assembly, the partition assembly includes partition plate, the partition plate is used to partition the water body in reaction tank, the partition plate can be moved and lifted in the reaction tank, and the directional transfer of water body on both sides of the partition is realized by water pump, so that the effective reaction zone volume of the reaction tank can be dynamically reconstructed according to the actual water inflow, the water body is concentrated and the aeration assembly in the waterless area is closed under small water condition, so as to improve the effective utilization rate of unit aeration gas, and has the advantages of dynamic adjustment of effective reaction process and overall treatment efficiency.

The invention discloses a zero-dimensional indium-based organic-inorganic hybrid perovskite material and a synthesis method thereof, and belongs to the technical field of photoelectric materials, the perovskite material has a general formula, R is one or more organic cations selected from methylamine, formamidine and cesium, and X is one or more halide ions selected from methylamine, formamidine and cesium; the invention further discloses a synthesis method of the material, the synthesis method comprises the steps of precursor solution preparation, coordination regulation and control, solvothermal reaction, product separation, surface modification, purification and drying, and the crystal structure and the surface chemical environment are precisely regulated and controlled through the synergistic effect of coordination regulation and surface passivation. The photoluminescence quantum yield of the material reaches 82% or above, and the material has excellent luminescence performance in a solution state, has ultrahigh environmental, water and thermal stability, and is lead-free, non-toxic and environment-friendly; the material can be widely applied to the photoelectric fields of light emitting diodes, X-ray scintillators, photocatalysis and the like, and the device performance is excellent.

The utility model relates to the technical field of water outlet nozzles, and provides a water outlet nozzle and an automatic noodle stretching machine thereof, the water outlet nozzle comprises a water outlet nozzle main body provided with a water inlet channel and a water outlet channel, the side part of the water outlet nozzle main body is provided with a first connecting end, and a gas inlet and outlet gap communicated with the first connecting end is arranged between the water inlet channel and the water outlet channel; the first end of the water inlet channel communicates with the water outlet channel. By arranging the gas inlet and outlet gap and the first connecting end, when hot water flows through the water outlet nozzle, steam can be discharged from the first connecting end through the gas inlet and outlet gap, water-steam separation is achieved, pressure rise or hot water splashing caused by steam gathering is avoided, and water outlet stability and safety are improved.

The invention relates to the technical field of microbial feed additives, and discloses a feed lactic acid bacteria additive and a preparation method thereof.The preparation method comprises the steps that lactobacillus plantarum and / or enterococcus faecalis are / is used as strains for activation and expanding culture, agricultural and sideline product waste is used as a substrate for liquid-state deep fermentation, and mature fermentation liquor is obtained; mixing the mature fermentation liquor with a composite protective agent containing double essential oil, chitosan, theabrownin and porous silicon dioxide, granulating, and pre-drying at low temperature to obtain a semi-dry particle core; and coating with kappa-carrageenan / konjac glucomannan / phytosterol ester composite gel, drying and packaging to obtain a finished product. The double essential oils, the chitosan and the theabrownin are combined to form a full-spectrum active antibacterial system; the elastic composite gel outer layer realizes dual protection of liquid water and water vapor; porous silicon dioxide actively maintains low water activity of particles to prevent lactic acid bacteria from being recovered in advance; the product has the advantages of high viable count, strong heat and acid resistance and excellent storage stability.

The invention provides a preparation method and application of a citric acid modified Cd-MOF material, and belongs to the technical field of metal organic framework materials. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) is synthesized by adopting a chemical grafting and steam diffusion method, and the adsorption performance and the reusability of the citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) are systematically researched. Parameters such as concentration, dosage, pH and the like of citric acid are associated, the adsorption effect of the citric acid on heavy elements in a portable solution is investigated, and the adsorption capacities of the citric acid on anionic dye Congo red (CR) and heavy metal ions (Cu < 2 + >) are as high as 900.9 and 287.4 mg.g <-1 > respectively. The citric acid modified beta-cyclodextrin metal organic framework (CA-beta-CD-MOF) obtained by the invention has the characteristics of being simple, green, environment-friendly and reusable, has excellent adsorption performance, and can be used for simultaneously removing organic dye and heavy metal ion pollution in water.

This invention discloses a modular process treatment method and system for treating multi-component wastewater, relating to the field of wastewater treatment technology. The method includes: constructing a modular process unit library and standardizing its interfaces; establishing a module removal spectral fingerprint based on the modular process unit library; collecting toxicity characteristics and constructing feature vectors for the multi-component wastewater to be treated; performing module matching between the module removal spectral fingerprint and the wastewater feature vectors; constructing a process matrix to generate a set of candidate process paths; and filtering the candidate process paths; determining the optimal process path based on the filtering results and triggering modular switching; after switching, the module completes the treatment of multi-component wastewater and continuously evaluating the operational effect. This invention significantly improves the adaptive treatment accuracy, operational reliability, and overall energy efficiency of the modular process for treating multi-component wastewater, realizing a transition from fixed processes to intelligent dynamic configuration.

The present application belongs to the technical field of asphalt pavement materials, and particularly relates to a polyphosphoric acid-low density polyethylene composite modified asphalt and an asphalt pavement material. The polyphosphoric acid-low density polyethylene composite modified asphalt is made of base asphalt, a polyethylene modifier and polyphosphoric acid. The polyethylene modifier is a kind of high polymer material, and has good elasticity and toughness, and can enhance the ability of the asphalt to resist permanent deformation, the elastic recovery ability and the fatigue resistance at high temperature. The polyphosphoric acid can chemically react with some components in the asphalt to form chemical bonds, thereby enhancing the interaction force between the asphalt molecules, improving the overall strength of the asphalt, and improving the compatibility between the polyethylene modifier and the asphalt, so that the polyethylene modifier is more uniformly distributed in the asphalt, and the ability of the asphalt to resist permanent deformation, the elastic recovery ability and the fatigue resistance at high temperature are further enhanced.

The invention relates to the technical field of recycled asphalt, and particularly discloses a high-temperature-resistant large-dosage RAP recycled asphalt mixture and a gradient activation preparation method thereof, and the recycled asphalt mixture comprises the following components in parts by weight: 70-90 parts of an RAP material, 5-26 parts of a new aggregate, 4-5 parts of SBS modified asphalt and 0.04-0.05 part of a composite regenerant. The composite regenerant and the bio-oil-based regenerant provided by the invention can recover the flexibility of the aged asphalt; after the silane coupling agent is hydrolyzed, silicon hydroxyl (Si-OH) formed by the silane coupling agent and the bio-oil-based regenerant can be bonded with hydroxyl (Si-O-Si bond) on the surface of the aggregate to form a bonded network, so that the interface adhesion strength is improved, the interface slippage is reduced, the skeleton of the mixture is more stable, the stripping resistance of the interface is enhanced, the dynamic stability and the water stability are improved, and the service life of the mixture is prolonged. And after the recycling agent recovers the flexibility of the asphalt, a bonding network formed by the silane coupling agent endows the recycled asphalt mixture with a high-elasticity characteristic, and the risk of fatigue cracking is reduced.

The invention provides a silsesquioxane porous material with a near-infrared light catalytic effect as well as a preparation method and application of the silsesquioxane porous material. The preparation method of the silsesquioxane porous material comprises the following steps: (1) in a solvent A, under the action of piperidine, enabling (3, 5, 5-trimethylcyclohex-2-alkenyl) malononitrile to react with a donor compound to obtain a D-A compound; (2) dissolving octavinyl silsesquioxane and the D-A compound obtained in the step (1) in a solvent B, adding a catalyst, uniformly stirring, and reacting; after the reaction is finished, cooling, filtering and washing to obtain a solid; and carrying out Soxhlet extraction on the obtained solid, and carrying out vacuum drying on the obtained solid to obtain the silsesquioxane porous material with the near-infrared light catalytic effect. The prepared silsesquioxane porous material has the advantages of wide absorption of near-infrared light, high light absorption and conversion efficiency, high catalytic activity, chemical stability and water stability.

This invention provides an in-situ passivation method for perovskite thin films, a perovskite solar cell, and a method for preparing the same. The in-situ passivation method includes: preparing a perovskite precursor solution comprising formamidinium cations, divalent metal cations, halide anions, and fluorobenzylamine, wherein the content of fluorobenzylamine is 0.01% to 1% of the molar amount of formamidinium cations; coating the perovskite precursor solution and annealing it to crystallize the solution and allow the fluorobenzylamine and formamidinium cations to react in situ, forming an in-situ passivated perovskite thin film. In this application, fluorobenzylamine is used to in-situ passivate the formamidinium-containing perovskite system, achieving mutual promotion between the passivation and crystallization adjustment processes. Furthermore, in-situ passivation suppresses ion migration, allowing the high-quality thin film structure composed of large grains to be maintained during long-term operation, ultimately achieving high device stability.

This invention discloses a novel seawater and sea sand recycled concrete base course and its construction method, belonging to the field of transportation engineering. Its characteristics are as follows: the preparation material of the novel base course is a mixture composed of a curing agent, seawater, sea sand, recycled coarse aggregate, and admixtures in a mass ratio ranging from 1~8:0.4~4.2:0.2~6.8:0.4~8.8:0~0.6; the sea sand is a continuously graded fine aggregate such as marine sand and gravel, coral fragments, and shell fragments; the recycled coarse aggregate is a continuously graded coarse aggregate such as waste coral; the curing agent consists of a slowly hydrated cementing component and a rapidly hydrated expansion component that reacts with chloride and sulfate ions in the seawater and sea sand to form expanding hydrates; based on the design strength value of the novel base course, specific compaction machinery, compaction rate, number of compaction passes, and constraint load value are selected; the curing agent, seawater, sea sand, recycled coarse aggregate, and admixtures are mixed evenly in a certain proportion, spread, compacted using a compaction machine, and cured under constraint load for 7 days before the constraint is removed to obtain the novel seawater and sea sand recycled concrete base course.

The utility model relates to the technical field of sprinkling irrigation devices, and provides a sprinkling irrigation device and a nozzle assembly thereof. The nozzle assembly of the sprinkling irrigation device comprises a nozzle main body, the nozzle main body is provided with a water inlet, a water outlet and a flow channel communicated with the water inlet and the water outlet, and water flow can be guided to flow into the flow channel from the water inlet and flow out from the water outlet; the flow stabilizing piece is arranged in the flow channel, the flow stabilizing piece is provided with a plurality of first holes in the direction of the flow channel, the first holes are communicated with the flow channel, and the sum of the opening areas of the first holes is smaller than the opening area of the position, where the flow stabilizing piece is located, of the flow channel.

The application provides a high-strength asphalt cold patching material and a preparation method thereof, belongs to the technical field of asphalt polymer materials, and the asphalt cold patching material comprises road petroleum asphalt, anionic emulsified asphalt, EAS-GMA, a core-shell structure composite modifier, epoxy soybean oil, basalt machine-made sand, limestone gravel, KH-550 and the like. The EAS-GMA is prepared by the reaction of polyamide resin, epoxy resin and stannous octoate, and then modified by KH-570. The core-shell structure composite modifier is prepared by the reaction of an isocyanate-terminated polyurethane prepolymer, epoxy resin and benzyl glycidyl ether, and then emulsified, and then MMA and KH-570 are added for adsorption, and then KPS is added for initiating reaction. The asphalt cold patching material is prepared by the synergy of multiple components and process optimization, breaks through the technical bottlenecks of long curing period, low initial strength, poor adhesion and insufficient durability of traditional cold patching materials, and realizes the unification of immediate compression and solidification and high strength and durability.

This invention relates to the field of water resource recycling technology and provides a hydrological water resource recycling purification device, comprising: a control unit, which is connected to an adjustable component in the sensing and detection unit and the physical processing unit, for receiving monitoring data from the sensing and detection unit, constructing multiple evaluation models based on the monitoring data and outputting corresponding evaluation indicators, and generating adjustment commands for the opening rate of the adjustable perforated rectifier structure and the flow rate of the backwash pump based on the comparison results of the output evaluation indicators with preset thresholds, so as to maintain the water purification stability of the entire system process. This system realizes dynamic and refined control of the water purification stability of the entire process of the hydrological water resource recycling purification device. The adjustable perforated rectifier structure adjustment module optimizes the influent flow pattern from the source, enhancing the system's adaptability to fluctuations in influent water quality.

The invention discloses an anti-phenolic yellowing polypropylene staple fiber and a preparation method thereof, and belongs to the technical field of high-performance polypropylene, the preparation method comprises the following steps: reacting 2, 3-naphthalic anhydride with 1-methyl-1-phenylhydrazine to generate a ring-opening intermediate containing a naphthalene ring and hydrazide structure, and esterifying the ring-opening intermediate with compound fatty alcohol of hexadecanol and 2-octyldodecanol to obtain an anti-phenolic yellowing agent; the phenolic yellowing resistant agent is compounded with low-viscosity mineral white oil, caprylic capric triglyceride, polyethylene glycol fatty acid ester, polyisobutylene succinimide and lauryl phosphate monoester potassium salt to form an oil-based phenolic yellowing resistant functional agent, and the oil-based phenolic yellowing resistant functional agent is coated on the surface of a polypropylene fiber through a bundling oiling process. Compared with the prior art, the method has the advantages that double synergy of compact barrier and uniform covering is achieved, the anchoring capacity of the functional film is enhanced, the yellowing grade of the obtained polypropylene staple fiber phenol reaches 4.5 grade, the polypropylene staple fiber phenol is free of attenuation after being soaked in water, the breaking strength is larger than or equal to 4.5 cN / dtex, and the elongation at break is larger than or equal to 40%.

The present application relates to the technical field of phosphogypsum building new material production, in particular to a phosphogypsum harmless treatment device, a treatment process and application thereof, the device comprising an aggregate bin, a powder bin, a powder mixer, a conveyor, a mixing blender, a discharge bin and a reservoir, and a phosphogypsum solidified body bin, a phosphogypsum solidification and air drying all-in-one machine, and a phosphogypsum raw material crusher, the device with the above structure is needed to realize the harmless treatment of phosphogypsum, the crushing and harmless treatment processes of phosphogypsum are added to the existing mixing station, the phosphogypsum raw material crusher and the phosphogypsum solidification and air drying all-in-one machine are arranged in the treatment device to crush and harmlessly treat the phosphogypsum, so that the phosphogypsum can be uniformly mixed with other building materials to improve the product quality, and the phosphogypsum harmless treatment process is designed, the material formed by the process forms a complete new technology which can be popularized from manufacturing to application, and achieves the application performance of industrialization and scaling.

This invention discloses a method for preparing a hydrogen leak indicator material, comprising: dissolving ethyl cellulose (EC) and mixing it with a noble metal precursor solution to obtain an EC-noble metal precursor mixed solution, wherein the noble metal is Pt or Pd; coating a slurry containing nano-WO3 onto a substrate to form a WO3 layer; coating the EC-noble metal precursor mixed solution onto the surface of the WO3 layer to obtain a precursor film; and heat-treating the precursor film to generate an EC-Pt / Pd nanocomposite layer on the surface of the WO3 layer, thereby obtaining an EC-Pt / Pd-WO3 composite hydrogen leak indicator material. This invention also discloses the hydrogen leak indicator material obtained by the above preparation method and its application in visual detection, fiber Bragg grating hydrogen sensors, or hydrogen leak monitoring devices. The hydrogen leak indicator material provided by this invention possesses catalytic hydrogen dissociation, hydrogen-induced color change, water resistance, and sensor adaptability.

The invention belongs to the technical field of functional materials, and discloses a cobalt-based MOF crystal material and a preparation method and application thereof. The molecular formula of the cobalt-based MOF crystal material is [Co (H3TPPE) x (H3TTPE) y (HCOO)], wherein the value of x and the value of y meet the condition that x + y = 1; the H3TPPE is partially deprotonated 1, 1, 2, 2-tetra (4-(1H-pyrazol-4-yl) phenyl) ethylene, and the H3TPPE is partially deprotonated 1, 1, 2, 2-tetra (4-(1H The H3TTPE is partially deprotonated 1, 1, 2, 2-tetra (4-(1H-tetrazole-4-yl) phenyl) ethylene, and the structural formula of the H3TTPE is shown in the description. According to the cobalt-based MOF crystal material, through the synergistic effect of the two nitrogen heterocyclic ligands, while a large number of strong adsorption sites are introduced, the problem of pore channel blockage possibly caused by too dense functional sites is avoided, high porosity and a good gas diffusion channel are successfully kept, the material shows excellent adsorption capacity to gas (CO2) at normal temperature and normal pressure, and the cobalt-based MOF crystal material has good application prospects. The specific application potential is realized in the field of carbon capture.

This invention discloses a composite soil stabilizer for water-rich, low-temperature conditions, belonging to the technical field of soil stabilizer technology. The composite soil stabilizer provided by this invention comprises the following raw materials in parts by weight: 70-110 parts of main cementitious material, 10-20 parts of auxiliary cementitious material, 3-6 parts of low-temperature early-strength agent, 0.1-0.5 parts of high-efficiency early-strength agent, 5-10 parts of water-absorbing modifier, 3-8 parts of filler, and 1-2 parts of activator. Through the synergistic effect of its components, the composite soil stabilizer provided by this invention effectively solves the problem of solidifying water-rich, low-temperature soils without relying on preheating of raw materials or significant exothermic reactions of the system itself. It achieves rapid early strength, high final strength, and excellent water stability in low-temperature environments (around 0°C).

This invention relates to the field of highway engineering technology, and provides a design method and a method for asphalt mixtures that maintain long-term skid resistance. The method includes the following steps: testing the basic characteristics of multi-lithological aggregates and constructing an aggregate characteristic database; controlling the volumetric blending ratio of the mixed aggregates based on the volumetric method; initially selecting mixed aggregate combinations based on the differences in polishing effects and complementary performance principles of mixed aggregates from different lithologies, and setting a blending ratio gradient; conducting abrasion and polishing tests on the initially selected mixed aggregates, and determining the optimal combination based on the experimental results; designing and verifying the mix proportion of the asphalt mixed aggregates based on the optimal combination; and determining the final mix proportion based on the experimental results through balanced optimization. This approach helps guide the rational selection and optimized mix proportion of mixed aggregates, ensuring the long-term, stable maintenance and even improvement of skid resistance, while simultaneously achieving the goals of saving high-quality aggregates and controlling and reducing costs in the anti-skid surface layer of asphalt pavements.

The invention provides a sensing material based on a Tb metal organic framework as well as a preparation method and application thereof, the sensing material takes Tb < 3 + > as a metal center and acid radical ions of 2, 3-quinoline dicarboxylic acid as organic ligands, and a two-dimensional network structure is formed through self-assembly. The preparation method comprises the following steps: adding 2, 3-quinoline dicarboxylic acid and Tb < 3 + >-containing metal salt into a mixed solvent, carrying out solvothermal reaction at 130-150 DEG C for 36-60 hours, and after the reaction is finished, cooling and separating to obtain the Tb-MOF sensing material. The Tb-MOF sensing material disclosed by the invention has excellent stability and wide pH adaptability, and shows remarkable fluorescence quenching response to Fe and Al, the detection limits of the Tb-MOF sensing material to Fe and Al respectively reach 8.60 nM and 9.27 nM, and the Tb-MOF sensing material is extremely high in sensitivity, so that high-selectivity and high-sensitivity rapid detection of Fe and Al is realized.