706 results about "Repair material" patented technology

The invention discloses crack-chloride ion double-triggered subsea tunnel corrosion-resistant concrete and a preparation method thereof, and relates to the field of subsea tunnel engineering materials. The concrete is prepared from the following components in parts by weight: 400 to 500 parts of Portland cement, 50 to 80 parts of fly ash, 60 to 100 parts of superfine mineral powder, 1000 to 1100 parts of coarse aggregate, 700 to 800 parts of fine aggregate, 140 to 160 parts of water, 10 to 20 parts of self-repairing microcapsules and 1 to 5 parts of a water reducing agent, the self-repairing microcapsule comprises a capsule wall material, a self-repairing material and a layered dihydroxyl composite metal oxide. A crack-chloride ion double-response system is constructed, and the limitation of traditional single trigger repair is broken through. When a crack with a certain width appears in the concrete, the capsule wall of the self-repairing microcapsule is broken to release the repairing component, so that effective filling of the crack is realized; and meanwhile, the layered double-metal hydroxide can directionally adsorb chloride ions to form a stable compound, so that the migration rate of the chloride ions is remarkably reduced.

The invention discloses a high-toughness impervious polymer modified cement-based grouting material and a preparation method thereof, and belongs to the technical field of building repair materials. The component A is prepared from a cementing material, an admixture, a fine aggregate, a composite expanding agent, a polymer for concrete modification, fibers, an early strength agent, a water reducing agent, a composite retarder, a defoaming agent, an air entraining agent, a nano material and a functional component. The system solves the technical contradiction of toughness-strength-impermeability in the polymer modified cement-based material, and the material has excellent comprehensive performance: the initial fluidity is greater than or equal to 330 mm, the 28d compressive strength is greater than or equal to 82 MPa, the breaking strength is greater than or equal to 16.8 MPa, the bending-compression ratio is greater than or equal to 0.19, the impermeability pressure value is greater than or equal to 2.6 MPa, and the material is suitable for the fields of prefabricated buildings, tunnel engineering and the like.

The invention belongs to the technical field of asphalt pavement repairing, and particularly relates to a local repairing technology of an asphalt pavement, which comprises the following specific contents: detecting a disease range by adopting ground three-dimensional laser scanning or ground penetrating radar, determining a repairing boundary, sampling and detecting the aging degree, the moisture content and the grading type of the asphalt of the original pavement, and determining the repairing quality of the asphalt pavement. According to the method, the bonding strength of the repairing material and the asphalt layer of the original pavement is enhanced by heating and activating the interface of the original pavement and emulsifying the asphalt bonding layer, and matching the repairing material with the shrinkage coefficient of the original pavement and reinforcing and compacting the edge, so that the condition that the repaired position is cracked, loosened and damaged in a short time is avoided; warm-mixed asphalt is adopted, the heating temperature is reduced by 40-60 DEG C, cold-mixed emulsified asphalt is popularized, and the asphalt does not need to be heated, so that release of a large amount of volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs) and dust is effectively avoided, and air pollution is avoided.

The invention provides a cold-resistant and saline-alkali-resistant concrete micro-crack repairing material and a preparation method thereof, and belongs to the technical field of preparation of concrete repairing materials. The concrete micro-crack repairing material comprises a calcium source permeation component, an organosilicon waterproof material component, a complexing component and a reinforcing component, and the specific types of all the components are limited. The concrete micro-crack repairing material has cold resistance, has a certain degree of ion erosion resistance, and can reduce the influences of internal structure damage, durability degradation, steel bar corrosion and the like caused by a low-temperature saline-alkali environment on a concrete matrix; after the concrete micro-cracks are repaired, further expansion of the micro-cracks can be reduced, the mechanical property of a concrete structure in a low-temperature saline-alkali environment is improved, the service life of the concrete structure in the low-temperature saline-alkali environment is prolonged, the maintenance cost is reduced, and a reliable guarantee is provided for infrastructures such as bridges, roads and dams in cold saline-alkali areas.

The invention discloses a preparation method and application of a ceramic glaze layer protecting and repairing material, and belongs to the technical field of cultural relic protection. The preparation method comprises preparation of a core-shell self-repairing nanocapsule, and the preparation of the core-shell self-repairing nanocapsule comprises the following steps: reacting a calcium chloride solution with a sodium hydroxide solution, then adding sodium polyacrylate and nano ZnO, and carrying out dispersion, centrifugation, washing and other operations to prepare the nano Ca (OH) 2-ZnO composite material. The nano Ca (OH) 2-ZnO composite material of the core-shell self-repairing nanocapsule can be rapidly released through the 3.5 nm aperture of the mesoporous SiO2 shell, glaze layer cracks are physically filled and react with CO2 in air to generate CaCO3 crystals, crack plugging is achieved, meanwhile, dynamic disulfide bonds of a PU layer are broken and recombined under stress stimulation, a crack interface is repaired through chemical bonding, and the performance of the core-shell self-repairing nanocapsule is improved. The 24-hour crack repair rate is greater than or equal to 96%, and the limitation of'one-time repair 'of a traditional material is solved.

The invention provides a hot-state repairing material and a preparation method thereof, and belongs to the technical field of refractory materials. The hot-state repairing material provided by the invention is prepared from the following raw materials in percentage by mass: 87 to 98 percent of waste bricks, 0.5 to 4.5 percent of magnesium mineral micro powder, 0.5 to 5.0 percent of slag powder, 0.5 to 2.0 percent of dispersing agent, 0.2 to 1.5 percent of organic fiber and 0.1 to 0.5 percent of binding agent. According to the invention, waste bricks are used as aggregates, contain tiny pores, provide channels for reaction gas for heating the hot-state repairing material, and can be rapidly sintered with a furnace lining; the slag powder can be matched with the binder to improve the thermal adhesion rate of the thermal repairing material; the magnesium mineral micro powder can improve the reaction activity, and the dispersing agent assists the combination effect of the slag powder, so that the repairing material can be sintered through rapid reaction, and the compression strength and the erosion resistance are improved; and the organic fibers can form good filling among particles and fine powder, so that the compression strength and the erosion resistance are improved.

The invention relates to a digital twinning fused material-equipment collaborative crack repair design method and equipment, and the method comprises the following steps: building an electromagnetic-thermal field coupling model, and obtaining pavement temperature field distribution, the electromagnetic-thermal field coupling model being a system combining microwave heating equipment, an asphalt pavement, a crack and a repair material; based on the mapping relation between the pavement temperature and the dynamic modulus, a pavement compaction model under the action of a road roller is established through finite element simulation; actual pavement parameters are obtained, a key parameter combination of a crack repairing material and microwave heating equipment is inversely optimized according to the pavement compaction model, and the key parameter combination comprises an electromagnetic loss parameter E, heating power W, heating width b and heating time t; and designing a crack repairing material and microwave heating equipment based on the final optimized key parameter combination. Compared with the prior art, the method has the advantages of accurate repair, convenient construction, high repair efficiency, small environmental disturbance and the like.

The invention discloses a super-early-strength shrinkage-free high-crack-resistance tunnel spraying repair material in the technical field of civil engineering materials, which comprises the following raw materials in percentage by mass: 35-45% of sulphoaluminate cement; 8%-12% of a superfine early strength admixture; 2%-3% of a calcium sulphoaluminate expanding agent; 1%-2% of a magnesium oxide-based expanding agent; 1-2% of a calcium-magnesium composite expanding agent; 10%-15% of hollow glass beads; 1.5%-2.5% of copper plated steel fiber; 0.1%-0.3% of polypropylene fiber; 25%-30% of graded quartz sand; 0.5%-1.0% of a polycarboxylic acid water reducing agent; 3%-5% of an alkali-free liquid accelerator; 0.3%-0.8% of a thixotropic agent; and 0.1%-0.3% of a thickening time control agent. According to the method, a multi-scale performance cooperative regulation system is innovatively constructed. Through accurate control of the hydration process of a gel system, a shrinkage stress multi-stage compensation mechanism and systematic integration of a fiber-matrix interface strengthening technology, the mutual restriction relationship among early strength development, volume stability and crack resistance of a traditional material is broken through.

An epoxy concrete stirring device is used for solving the problems that underwater epoxy repairing materials are stored in a layered mode, the mixing time is uncontrollable, and underwater operation is inconvenient. The device comprises a stirring kettle, a kettle cover and an internal partition plate, wherein the partition plate divides a cavity into an upper-layer curing agent storage area and a lower-layer mortar mixing area; a seepage mechanism is arranged in the center of the partition plate, a movable plug is in linkage with an inner wall bayonet lock through a threaded groove in the outer wall of a stirring shaft, the stirring shaft rotates to drive the movable plug to move upwards, seepage holes in the outer wall of a liquid collecting groove are opened, and controllable inflow of a curing agent into mortar is achieved; the feeding port and the discharging port are controlled to be opened and closed through a hydraulic valve, a hydraulic machine and a hydraulic clamp respectively. According to the device, advanced reaction of components is avoided through layered isolation, mixing is accurately triggered through mechanical linkage, hydraulic driving adapts to underwater operation, it is ensured that the low consistency and high uniformity of materials are kept, and the reliability of underwater repair construction and the performance stability of the materials are improved.

The invention discloses an ingredient mixing device for CIPP-ultraviolet light curing repair material production, and particularly relates to the technical field of CIPP-ultraviolet light curing repair material.The ingredient mixing device comprises a shell, supporting frames are fixedly connected to the four corners of the lower end of the shell, and a stirring mechanism is arranged on the lower portion of the inner surface of the shell; the inner surfaces of the two circular cavities are jointly provided with a pretreatment assembly, and a premixing assembly is arranged above the stirring mechanism. According to the ingredient mixing device for production of the CIPP-ultraviolet curing repair material, the pretreatment assembly is arranged, a liquid resin material is subjected to layered swinging, scraping, runner conveying and converging mixing, and the problem that local aggregation or layered precipitation is prone to occurring due to viscosity and density differences caused by different types of liquid resin is solved; different types of liquid resins can firstly form independent thin layers, and then are gradually contacted and fused along a flowing path, so that full shearing and permeation among the liquid resins are realized, and the mixing uniformity of the liquid resins is improved.

The invention relates to the technical field of building materials, in particular to a high-elasticity polyurethane-asphalt composite road crack repair material and a preparation method thereof, and the high-elasticity polyurethane-asphalt composite road crack repair material comprises the following raw materials: an asphalt-based material, functional modified polyurethane, a polyether-polyolefin block copolymer, functional rubber, 2, 6-di-tert-butyl-4-methylphenol and sodium polyacrylate. According to the invention, a lipophilic functional group is introduced into a molecular chain of the functionalized modified polyurethane, so that the functionalized modified polyurethane can interact with alkyl in asphalt to form a more stable synergistic network structure, and the phase separation phenomenon of the polyurethane and the asphalt is effectively reduced; the modified polyurethane not only improves the elasticity, flexibility, temperature resistance and crack resistance of the composite material, but also optimizes the processability of the material, enhances the interface bonding force, and further improves the repair effect and the road durability.

The invention relates to an ancient building green repair cost optimization method combined with carbon footprint analysis, and relates to the technical field of green buildings, and the method comprises the steps: obtaining the structural damage and functional decline problems of a to-be-repaired ancient building; based on the structural damage and functional decline problems of the to-be-repaired ancient building, a repair project of the to-be-repaired ancient building is determined; based on the repair project of the to-be-repaired ancient building, determining multiple repair schemes of the to-be-repaired ancient building; for each repairing scheme, determining a production carbon emission factor, a transportation carbon emission factor and a carbon emission factor of construction energy of each repairing material of the repairing scheme, and determining the carbon emission factor of the construction energy based on the production carbon emission factor, the transportation carbon emission factor and the carbon emission factor of the construction energy of each repairing material of the repairing scheme; performing carbon footprint analysis on the repairing scheme, and calculating the total carbon emission of the repairing scheme; the optimal repairing scheme is determined based on the total carbon emission of the repairing scheme, and the method has the advantage of reducing the carbon emission of ancient building repairing.

The invention relates to a self-repairing flow state solidified soil reinforced retaining wall for slope toe reinforcement and a construction method, and the retaining wall comprises a wall body which is formed by self-repairing flow state solidified soil in a cast-in-place mode and is provided with extension sections on the two sides, and drainage holes are formed in the extension sections; the foundation is arranged on the foundation and used for supporting the wall body; the reinforcement system is composed of multiple layers of geogrids and embedded in the wall body in a layered mode, one end of each layer of geogrid is anchored in the wall body, and the other end of each layer of geogrid extends backwards and is anchored in the backfill area; when the retaining wall has micro-cracks due to uneven settlement of a soft foundation, the high-alkali environment at the cracks can immediately trigger the alkali-sensitive self-repairing microcapsules to be broken, the released repairing material can generate gel in situ to seal the cracks, the mechanism converts traditional passive damage into active repairing, crack development is effectively restrained, an erosion channel is blocked, and the service life of the retaining wall is prolonged. Therefore, the long-term durability of the retaining wall is obviously improved.

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The invention relates to the technical field of civil engineering material detection, and particularly discloses a performance detection method of self-repairing concrete for civil engineering, which comprises the following steps: acquiring micro-deformation field data of a crack area in real time in a crack induction process, and constructing a joint simulation model; predicting an initial contact state between a crack and a repair material based on the model, extracting interface pressure distribution and effective bonding area change information, and calculating an interface bonding failure risk characteristic value through an improved fuzzy C-means clustering algorithm; a periodic load is applied to a preset crack area, a closed response signal is collected, and a multi-scale crack expansion coupling degree characteristic value is constructed to quantify coordination between microscopic filling and macroscopic recovery; fusing the two feature values into a composite repair quality feature vector, inputting the composite repair quality feature vector into a recognition model based on an improved deep residual network, recognizing and repairing a blind area, and generating a spatial positioning tag map; and finally, dynamically adjusting the monitoring path and the loading frequency according to an identification result.

The invention relates to the technical field of pavement patching materials, in particular to a pavement patching material with high early strength and toughness and a preparation method thereof. The repairing material is formed by compounding phosphate-based powder A, magnesium oxide-based powder B, a composite retarder C and a fiber material D, the phosphate-based powder comprises phosphate and disodium hydrogen phosphate dodecahydrate; the magnesium oxide-based powder B comprises dead burned magnesium oxide, superfine powder, industrial solid waste powder, cellulose ether and wollastonite whiskers; the composite retarder C comprises borax and nitrite; the fiber material D comprises reinforced fibers. The preparation method is the preparation method of the pavement patching material. The pavement patching material slurry has high early strength, the construction time can be remarkably shortened, and it is guaranteed that a repaired pavement has excellent mechanical performance and durability; according to the preparation method, materials can be prepared respectively, and standardized production, transportation and storage are facilitated; only water needs to be added for preparation on a construction site, and construction is convenient.

The application discloses a pressurized mountain mine cave outburst pollution water repair system, which comprises a mountain, a mine cave outflow outlet on the mountain and a gully formed along the trend of the mountain, the gully is located downstream of the mine cave outflow outlet, a mine cave outflow collection pool and at least one stage of sewage treatment devices are sequentially arranged in the gully from high to low in elevation, the sewage treatment devices of each stage each comprise a repair device and a monitoring pool connected to a downstream end of the repair device, the monitoring pool is provided with a standard water outlet directly discharging into the gully and a non-standard water outlet leading into the repair device of the next stage of sewage treatment devices, and the standard water outlet and the non-standard water outlet are each provided with an electric valve. The application can flow through the repair device by using the potential energy of the pollution water, does not need to increase a power source, and realizes the technical effect of reasonable use of the repair material according to the content of the pollutants by means of multi-stage repair and monitoring, which ensures complete repair and avoids unnecessary waste of the repair material.

The invention discloses a high-altitude tunnel lining concrete damage self-repairing material and a preparation method thereof, and the self-repairing material is prepared by doping a microcapsule and a conductive filler in a specific proportion into a traditional concrete matrix, the concrete comprises the following components: cement, fine aggregate, coarse aggregate, water, microcapsules I, microcapsules II, nano silicon dioxide, silica fume, carbon fibers and polypropylene fibers. According to the invention, a dual repairing system of the microcapsule I and the microcapsule II is innovatively adopted. The microcapsule I can repair large cracks (the width is larger than or equal to 0.2 mm), and the microcapsule II aims at small cracks (the width is smaller than 0.2 mm). The dual mechanism ensures comprehensive repair of cracks with different sizes, effectively prevents invasion of moisture and harmful substances, and remarkably improves the durability of the concrete. The microcapsule can be rapidly broken and release the repairing agent when the crack is generated, and the repairing agent can be cured in a short time, so that the crack is effectively prevented from further expanding, and the risk of structural damage is reduced.

The invention belongs to the technical field of cement concrete application, and particularly discloses a repairing material suitable for repairing hydraulic concrete at negative temperature and a preparation method thereof.The repairing material is prepared from, by mass, 530-690 parts of ordinary Portland cement, 60-170 parts of sulphoaluminate cement, 250-350 parts of mineral powder, 30-40 parts of expanding agent and 5-20 parts of multi-element layered metal hydroxide; the concrete comprises the following components in parts by weight: 60-80 parts of water, 3.0-4.6 parts of a water reducing agent, 0.9-1.8 parts of a defoaming agent, 6.2-8.2 parts of chopped fibers and 800-1000 parts of quartz sand. The repairing material can be used at negative temperature, meets the requirements of different hydraulic concrete repairing parts and construction processes, can effectively delay corrosion of corrosive ions in the environment to steel bars in hydraulic concrete, is particularly suitable for repairing damaged concrete in ocean engineering and water conservancy and hydropower engineering, and is large in market space and high in practicability.

The invention discloses a polymer cement-based repairing material for stone sculptures and a repairing method of the polymer cement-based repairing material, and belongs to the technical field of cultural relic repairing. The repairing material is prepared from the following components in parts by mass: 50 to 70 parts of PO.42.5 ordinary Portland cement, 20 to 30 parts of water, 5 to 15 parts of calcined kaolin, 0.03 to 1 part of nano silicon oxide, 1 to 3 parts of nano calcium carbonate, 0.01 to 0.03 part of organic silicon defoaming agent, 0.01 to 0.04 part of surfactant and 2 to 10 parts of vinyl acetate-ethylene copolymer. The polymer cement-based repairing material prepared by the invention can realize high bonding strength on a stone matrix and reversible removal at the same time. The polymer repairing material is simple in preparation process and green and environment-friendly in production, and has a wide application prospect in the field of repairing of cultural relics such as stone sculptures and the like.

The invention provides a natural bone repair material and a preparation method thereof. The material is animal cancellous bone inorganic salt particles or animal cancellous bone inorganic salt bone slices; the invention also relates to a preparation method of the natural bone repair material. The preparation method sequentially comprises the following steps: selecting materials, crushing, cleaning, removing organic matters, efficiently cleaning and drying, calcining and sterilizing. According to the method, inorganic base heating extraction and low-temperature calcination are adopted, so that the method is non-toxic, harmless, safe, efficient, low in organic matter residue and small in damage to the structure of a natural bone material, and the structure and morphology of the natural bone are better reserved; the defects of long construction period, low efficiency, high cost and the like existing in high-temperature calcination and organic reagent removal are avoided. The size of the bone repair material can be controlled, and the obtained bone repair material has certain mechanical strength, is not easy to break after being filled, and can play a good supporting role; and the material also has the advantages of high specific surface area, high porosity, low crystallinity, good hydrophilic performance, good biocompatibility and the like, and is suitable for bone defect repair.

The invention discloses a solid waste landfill crack combination self-repairing material based on microbial mineralization and application, and belongs to the field of environmental geotechnical engineering. The method comprises the steps that firstly, a klebsiella liquid and a calcium source cementing liquid are prepared, grouting holes are formed in the side slope, the bacterial liquid and the cementing liquid are injected in batches, and internal cracks are filled with a microorganism induced calcium carbonate precipitation (MICP) technology; and then, a fiber reinforced guniting material formed by compounding field soil, active magnesium oxide and chopped fibers is adopted to spray and cover the surface layer of the slope, and a compact sealing layer is formed through carbon dioxide carbonization. By combining internal MICP curing and surface layer fiber reinforced magnesium oxide carbonization sealing, a synergistic protection system with strong inside and tough outside is constructed, the anti-permeability and stability of the slope are improved, meanwhile, the toughness, crack resistance and long-term durability of a surface layer sealing layer are remarkably enhanced, and the service life of the slope is prolonged. And the method is particularly suitable for slope treatment of projects with high anti-seepage requirements such as solid waste landfills and the like.

The invention relates to the technical field of biomedical materials, and discloses an active composite membrane with an asymmetric double-layer structure as well as a preparation method and application of the active composite membrane. The active composite membrane with the asymmetric double-layer structure is prepared from the following preparation raw materials in percentage by mass: 95 to 98 percent of chitosan; 0.5%-2% of a plant polyphenol cross-linking agent; and 1%-4% of magnesium-based degradable inorganic filler. The active composite membrane has an integrated double-layer structure without interface bonding, the compact layer can effectively block soft tissues, and the porous layer is beneficial to cell adhesion and nutrition delivery; in a wet state, the material is excellent in mechanical property, controllable in degradation and high in cell safety, can effectively inhibit bacteria and promote osteoblast proliferation and differentiation, and can meet the performance requirements of bone defect repair on the material; the preparation method adopts the steps of solvent volatilization, freeze drying and precooled alkaline alcohol solution washing for preparation, the whole preparation process is carried out in a water phase, the conditions are mild, the steps are simple, complex equipment is not needed, and extremely high clinical transformation and industrialization potential is shown.

The application discloses a kind of bridge pier column crack automatic detection system based on wall-climbing robot, it is related to crack detection technical field, the closed loop operation of accurate detection from crack to intelligent repair is realized by crack detection module and repair material intelligent spraying detection module.The crack detection module uses multispectral imaging equipment, thermal imaging camera and laser scanning technology, can collect the multispectral difference value G (x,y) of crack area, surface temperature distribution T (x,y) and depth matrix D (x,y), extract crack boundary B (x,y) by high-precision algorithm and calculate crack volume Vc.The repair material intelligent spraying detection module calculates the volume Vm of repair material according to crack volume, optimizes spraying path and parameter using SLAM technology, to ensure uniform coverage and efficient use of repair material.The system greatly improves the accuracy of crack detection and repair, avoids material waste and missed repair.

The invention discloses a waterproof and leak-repairing device and method for an airport terminal building roof made of a beveled self-adaptive material, and relates to the technical field of roof leak repairing. Comprising two vertical frames which are symmetrically installed front and back, and the bottom walls of the vertical frames are each provided with an adjusting assembly used for being matched with the stability of an inclination angle maintaining device of the airport terminal roof. The driving assembly is used for controlling the repairing assembly and the processing assembly to descend into the area where the leakage point is located, the processing assembly is used for cleaning the area where the leakage point is located, dirt and other substances are prevented from affecting the adhesion effect of the repairing material, and then the repairing assembly extrudes the repairing material to the area where the leakage point is located. The whole device moves to control the scraping plate to evenly scrape the repairing material, so that the material is evenly attached to the area where the leakage point of the terminal building roof is located, and repairing and leakage repairing treatment is completed.

The application belongs to the technical field of self-repairing materials, and particularly relates to a kind of double-microcapsule self-repairing water-based polyurethane material and its preparation method. It comprises: ultrasonic dispersion of cellulose nanocrystals in deionized water to form an aqueous phase, adding dry oil and sodium dodecyl sulfate, and stirring to obtain a dry oil microcapsule with a Pickering emulsion as a template. Then, polyvinylpyrrolidone aqueous solution, non-polar solvent solution of thiophene monomer and ammonium persulfate aqueous solution are prepared. The first two are mixed and ultrasonically dispersed, then mixed with the ammonium persulfate aqueous solution and stirred to polymerize. After the reaction is completed, polythiophene microcapsule suspension is obtained. After centrifugation, the supernatant is colorless. The solid is washed and dried to obtain polythiophene microcapsules. Finally, the two kinds of microcapsules are added to the water-based polyurethane, mixed uniformly, dried at room temperature to form a double-microcapsule self-repairing water-based polyurethane material. The application realizes the self-repairing and mechanical property improvement of the double-microcapsule self-repairing water-based polyurethane material under room temperature natural light.

This invention relates to the field of concrete technology, specifically to a self-healing concrete material, its preparation method, and its application. The self-healing concrete material is a core-shell structured microcapsule, comprising a core material and a wall material. The wall material wraps around the core material. The core material comprises the following raw materials in parts by weight: 4-6 parts β-cyclodextrin, 12-18 parts sepiolite powder, 5-10 parts shellac powder, 25-35 parts sulfoaluminate cement, 10-15 parts magnesium oxide, 12-16 parts sodium silicate aqueous solution, and 14-17 parts calcium carbonate. The wall material comprises the following raw materials in parts by weight: 20-30 parts polyvinyl alcohol, 20-30 parts ethyl cellulose, 15-25 parts bentonite, and 25-35 parts corn starch. The mass ratio of the core material to the wall material is 6-7:3-4. The core material of the self-healing concrete material provided by this invention, comprising β-cyclodextrin, sepiolite powder, and shellac powder, can improve the problems of slow repair speed and poor reinforcement effect of self-healing materials.

The invention relates to the technical field of pavement maintenance, in particular to a portable pavement crack sealing hot patching device which comprises a movable frame, a support is fixedly connected to the movable frame, a storage assembly is arranged on the support and comprises a threaded column, the threaded column is rotatably connected to the support, a rotating cylinder is fixedly connected to the threaded column, and the rotating cylinder is fixedly connected to the movable frame. A plurality of placement grooves are formed in the rotary drum, sliding blocks are slidably connected to the interiors of the placement grooves, injectors are fixedly connected to the sliding blocks, a switching assembly is further arranged on the support and comprises sliding sleeves and first springs, the sliding sleeves are slidably connected to the interiors of the placement grooves correspondingly, and the first springs are fixedly connected to the sliding sleeves; the multiple first springs are fixedly connected between the multiple sliding sleeves and the inner wall of the containing groove. According to the pavement crack repairing device, injectors filled with different repairing materials can be selected according to different pavement materials, then the injectors are drilled into the ground to complete injection repairing of pavement cracks, the injectors can be cleaned after being used, and the situation that follow-up use of the injectors is affected by adhered soil and dirt is prevented.

This invention belongs to the field of building repair materials technology and provides a water-resistant and freeze-resistant magnesium phosphate cement repair mortar and its preparation method. The raw materials of the water-resistant and freeze-resistant magnesium phosphate cement repair mortar include: modified magnesium oxide, potassium dihydrogen phosphate, admixture, retarder, fine aggregate, water-reducing agent and water. The preparation method includes: (1) dry mixing: the modified magnesium oxide, potassium dihydrogen phosphate, admixture, fine aggregate and retarder are dry mixed to obtain a dry material system; (2) wet mixing and molding: half the mass of water is added to the dry material system, and after stirring, the remaining mass of water and water-reducing agent are added, and stirring is continued to obtain the water-resistant and freeze-resistant magnesium phosphate cement repair mortar. The repair mortar has excellent water resistance, freeze resistance and mechanical properties. The preparation method has a simplified preparation process, low production cost, and can realize the high-value utilization of solid waste, meeting the needs of rapid repair of building projects in harsh environments such as dampness and cold.

The invention discloses a wet-type large-surface repairing material and a preparation method thereof. The repairing material comprises the following components in percentage by mass: 20-30% of sintered magnesia coarse sand with the particle size of 10-5 mm and the mass percentage of 20-30%; the particle size of the sintered magnesia fine sand is 5-3mm, and the mass percent of the sintered magnesia fine sand is 5-15wt%; the grain size of the forsterite is 3-1 mm, and the mass percentage of the forsterite is 15-25 wt%; the particle size of the medium-grade magnesia is not greater than 2mm, and the mass percent is 15-25wt%; the particle size of the medium-grade magnesia fine powder is 150-200 meshes, the mass percent of the medium-grade magnesia fine powder is 10-15 wt%, the particle size of the magnesium-calcium-iron sand fine powder is 150-200 meshes, and the mass percent of the magnesium-calcium-iron sand fine powder is 1-8 wt%; 10 to 14 wt% of modified asphalt; and 0.5 to 1.5 wt% of industrial white oil. The repairing material disclosed by the invention is low in cost, environment-friendly and economical, has relatively high breaking strength, and is particularly suitable for a large-surface repairing material of a schreyerite steelmaking converter.