28results about How to "Improve impermeability" patented technology

The utility model relates to a one -piece board connection technical field, and disclose a kind of quick installation's mold protection one -piece board connecting piece, including plate body assembly, concrete component and connecting body assembly, concrete component is installed in the side of plate body assembly, connecting body assembly is respectively sleeved in the inside of plate body assembly and concrete component;It is favorable to prevent fire spread effectively through fireproof layer and outside reinforcing layer in plate body assembly, improve mold protection one -piece board strength and stiffness, avoid the crack of plate body, improve the safety, durability and permeability resistance of building;It is favorable to be directly together with concrete structure and pour in construction process, without additional formwork removal step, to significantly improve construction efficiency, and connecting piece can ensure mold protection one -piece board and the firm connection of the concrete wall body that pours, improve the safety and stability of structure, reduce installation cost and guarantee building safety.

The application discloses a shrinkage-compensating concrete containing acid-free weak base expandable graphite and a preparation method thereof. The concrete comprises cement 200-500 parts, mineral admixtures 50-200 parts, fine aggregate 600-800 parts, coarse aggregate 1000-1300 parts, water 120-200 parts, additive 5-15 parts and acid-free weak base low-temperature expandable graphite 15-75 parts. The expansion trigger temperature of the graphite is 90-100 DEG C, and the pH value is 6.0-8.0. The method comprises the following steps: firstly, uniformly mixing and stirring cement, mineral admixtures, fine aggregate, coarse aggregate and acid-free weak base low-temperature expandable graphite to obtain dry mixture B; secondly, mixing water and additive and adding the mixture into the dry mixture B to uniformly stir to obtain a concrete mixture; and thirdly, forming the concrete mixture, carrying out steam curing after final setting, naturally cooling to room temperature and obtaining the shrinkage-compensating concrete. Therefore, the concrete self-shrinkage can be precisely and efficiently compensated in the steam curing process of the concrete.

The utility model discloses a kind of centrifugal pile, plugboard, centrifugal pile assembly and retaining wall, belong to supporting technical field, including centrifugal pile and plugboard, the plugboard connects adjacent the centrifugal pile, the plugboard is installed in the front end of the centrifugal pile;The centrifugal pile includes body, through-hole and at least one slot, the through-hole is axially through the body, the slot is axially opened on the outer wall of the body;The protruding part of plugboard two sides is formed to outwardly extend, the protruding part is installed in the slot.The utility model is equipped with the plugboard by front, and the protruding part is connected with the clamping of the slot, effectively improve the anti-leakage ability of structure splicing, to further optimize the structural stability, and better adapt to the installation scene of asymmetric lateral pressure.Meanwhile, the through-hole can accommodate the soil particles that seep from the connecting place of the centrifugal pile and the plugboard, and also can act as drainage channel, to further guarantee the anti-leakage ability of structure.

This patent application belongs to the field of concrete repair technology, specifically relating to a method for repairing concrete cracks based on calcium carbonate deposition induced by a composite plant urease, including the following steps: S1: extracting soybean urease and canavagoid urease; S2: preparing a composite urease solution and a cementitious liquid; S3: injecting the solution to repair the cracks. The use of composite urease improves reaction efficiency and shortens repair time. It also specifically relates to a concrete repair device, including an infusion tube, a suction tube, and a needle. One end of the infusion tube and the suction tube are respectively connected to the corresponding pump body pipe. Negative pressure is used to suction the residual solution, ensuring that the solution after subsequent injection maintains a low concentration of ammonium ions, thus ensuring reaction efficiency.

This invention relates to the field of sheet pile support technology for foundation pit engineering, specifically a sheet pile support structure and construction method for foundation pit engineering. It includes multiple first sheet piles, second sheet piles, multiple fixing pipes, multiple first connecting plates, and second connecting plates arranged sequentially. The multiple first sheet piles are arranged from left to right, with adjacent first sheet piles abutting each other. This invention also proposes a novel construction method for sheet pile support in foundation pit engineering, including the following steps: Step 1: Lifting the sheet piles; fixing the lifting eye bolts to the upper end of the sheet piles via threads; after connecting the lifting eye bolts to the crane, lifting and moving the sheet piles to the designated construction position. This application, through the combination of fixing pipes and sheet pile embedding and the use of grouting for seepage prevention, can improve the overall stability, impermeability, and design strength of the sheet piles, expanding the application scope of sheet piles in the field of foundation pit support. Furthermore, it is convenient to install, simple to operate, causes minimal construction disturbance, and can be repeatedly recycled.

The present application relates to the technical field of building material recycling, and more particularly to a red mud-based high-performance concrete curb and a preparation method thereof. The curb is prepared from a red mud-based cementitious material, sand, stone, water, a color agent and an additive through a certain preparation method, realizes high-value resource utilization of solid waste such as red mud, improves the performance of the red mud-based concrete curb, is green and environmentally friendly, has a simple preparation process, low cost, high economic benefits, and is suitable for popularization and application.

The present application relates to the technical field of paint, in particular to an alkali-resistant waterproof exterior wall paint and a preparation method thereof. In order to further improve the water resistance and alkali resistance of the stone-like paint, the stone-like paint is improved, a texture protective paint is added to the structure of the traditional stone-like paint, and colored sand is added to the components, so that a concave-convex texture can be provided for the surface of the stone-like paint after the stone-like paint is finally formed. In addition, boron nitride nanosheets are added to the texture protective paint and modified, and fluorine and silicon elements are introduced into the boron nitride nanosheets, so as to improve the chemical corrosion resistance of the resin, prevent the infiltration and invasion of external corrosive media, and effectively improve the acid and alkali resistance of the resin paint.

This invention provides a composite cementitious material with high rheological properties, its preparation method, and concrete, comprising an active admixture, 40%–60% ordinary Portland cement, 20%–35% modified marble powder, and 0.8%–2% functional admixtures. The modified marble powder is obtained by surface modification treatment of marble powder with a silane coupling agent and a polycarboxylate superplasticizer, effectively solving the problem of marble powder agglomeration and ensuring uniform dispersion in the cementitious system. This significantly optimizes the rheological properties of the paste, improving fluidity and pumpability. The synergistic effect of cellulose ether and air-entraining agent in the functional admixtures further enhances the material's water retention and anti-segregation stability. The cementitious material prepared by this invention possesses both excellent mechanical properties and durability, and the concrete prepared with it exhibits good workability, dense structure, and reliable long-term performance. Simultaneously, this technology achieves high-value-added resource utilization of marble waste, reduces cement consumption and carbon emissions, and aligns with the direction of green building materials and sustainable development.

The application relates to the technical field of cement materials, and particularly discloses a high ore fused stone ferrite aluminate cement material and a preparation method thereof. The cement material is prepared by jointly grinding and treating high belite ferrite aluminate cement clinker and a modifier. The modifier is composed of succinyl phosphonate, a quaternary ammonium salt and an aluminum source. The molecular formula of the succinyl phosphonate is HOOC-CH2-CH2-CO(PO3H2). The modifier composed of succinyl phosphonate, a quaternary ammonium salt and an aluminum source is used to perform mechanochemical coupling modification on the belite ferrite aluminate cement clinker, multi-level interface interaction occurs under the induction of mechanical force, directional poisoning and growth inhibition of calcium aluminate crystal nuclei are realized, the early strength of the cement is maintained, and the volume stability of the cement material is significantly improved.

This invention relates to the field of centrifugal molding technology, and more particularly to an energy-saving, high-efficiency centrifugal molding device for cement poles. The device includes a base, on which an annular steel mold is mounted. The annular steel mold comprises an upper steel mold and a lower steel mold, on which multiple first arc-shaped strips and multiple second arc-shaped strips are respectively installed; a first cover plate and a second cover plate, respectively disposed on both sides of the annular steel mold; a central sleeve fixedly connected to the first cover plate; and a rotating assembly disposed on the first cover plate. The central sleeve of this invention incorporates an air-bag compression vibration mechanism. Through a rotating shaft, the compression ball periodically compresses the air bag, generating high-frequency micro-vibrations that allow the concrete slurry to flow fully, effectively expelling internal air bubbles and pores. This significantly improves the density, impermeability, and frost resistance of the pole, extending its service life and benefiting the production of cement poles.

The application provides a preparation process of concrete with tunnel hole slag as raw material. The preparation process of concrete with tunnel hole slag as raw material comprises the following steps: crushing the tunnel hole slag and performing primary screening; finely crushing and preparing machine-made sand through a single production process; dry mixing main materials such as cement; mixing basalt fibers and polypropylene fibers; and preparing a mixed solution and stirring and mixing. The application can improve the impermeability and frost resistance of the prepared concrete by mixing and doping basalt fibers and polypropylene fibers which have acid and alkali resistance.

This invention discloses a solid waste-based low-carbon gel material and its preparation method. The material comprises, by mass percentage: 40%-60% highly active slag, 20%-35% graded bottom ash from a tower, 3%-8% pH-sensitive composite activator, 0.5%-2% nano-C-S-H seed crystals, 0.1%-1% modified cellulose nanocrystals, and 15%-25% water, with a controlled water-to-solid ratio of 0.15-0.28. The preparation method includes graded pretreatment of bottom ash, preparation and dispersion of nano-C-S-H seed crystals, preparation of the pH-sensitive composite activator, and mixing and slurry preparation. Graded treatment optimizes sulfate release, the pH-sensitive activator dynamically regulates alkalinity, and the nano-C-S-H seed crystals and modified cellulose nanocrystals induce ordered hydration and a multi-level porous structure, significantly improving compressive strength, impermeability, and low expansion rate. This invention effectively utilizes industrial solid waste, reduces energy consumption and carbon emissions, solves problems of uneven hydration and expansion cracking, and is suitable for green building and resource recycling.

The application provides a bridge cap intelligent maintenance collaborative control method based on multi-sensor fusion and model prediction, comprising the following steps: S1: inputting and configuring parameters; S2: collecting and preprocessing multi-source data; S3: extracting maintenance state characteristics from the preprocessed data; S4: setting a partition water distribution scheme according to the maintenance characteristics; S5: setting a temperature regulation scheme according to the maintenance characteristics; S6: performing behavior prediction and optimizing decisions; and S7: generating and issuing control instructions. The application integrates the whole process from data collection, cleaning, feature extraction to intelligent decision making, control instruction generation and issuance, realizes closed-loop automatic control of the perception-analysis-decision-execution of the maintenance process, and greatly reduces the dependence on artificial experience.

A process for repairing the gable roof of a hip-and-gable building is characterized by the following steps: 1. Repairing the wooden base layer; 2. Applying protective plaster; 3. Applying two layers of hemp and six layers of plaster; 4. Applying three coats of pigment paint and one coat of varnish; 5. Making and installing a metal gable roof made of finely carved aluminum plate; 6. Fixing with round nails; 7. Restoring the glazed tile ridge and roof tiles; wherein, the method for making the metal gable roof includes: (1) splicing metal aluminum materials and polishing and finely carving the joints; (2) applying an epoxy fluorocarbon composite coating; the coating has a three-layer structure, consisting of a base layer, an intermediate layer and a cover layer, wherein the base layer is made of an epoxy resin type primer containing epoxy resin, epoxy modified filler and isocyanate curing agent, the intermediate layer is made of a composite two-component intermediate paint containing epoxy resin, fluorocarbon resin, polyamide resin and aliphatic polyamine curing agent, and the cover layer is prepared by a two-component fluorocarbon topcoat.

The application provides a basalt powder and a basalt fiber reinforced anti-cracking mortar and a preparation method thereof, and belongs to the technical field of cement, concrete and other building materials. The application comprises components of Portland cement, basalt powder, graded sand, basalt fiber, latex powder, cellulose ether and water reducing agent. The application optimizes the compactness of the matrix by filling and reacting with the basalt powder and the pozzolanic ash, and forms a three-dimensional reinforcing network with strong interfacial bonding by using the basalt fiber which is subjected to surface etching and silane coupling treatment. The two components synergistically improve the crack resistance and toughness of the mortar, and the mortar shows a high ductility failure mode with multiple crackings. Meanwhile, the tensile strength, the bending strength and the compressive strength of the mortar are comprehensively enhanced, and the fracture energy is significantly improved. In addition, the high-density matrix and the corrosion-resistant fiber together endow the mortar with excellent impermeability, freeze-thaw resistance and corrosion resistance, and greatly prolong the service life.

This invention discloses an all-solid-waste alkali-activated cementitious material and its preparation method, relating to the field of building materials technology. The cementitious material, by weight, comprises the following components: 300-400 parts blast furnace slag, 150-350 parts glass powder, 30-200 parts red brick powder, 40-70 parts desulfurized gypsum, 160-260 parts alkali activator, 10-30 parts sodium sulfate, 30-40 parts sodium tripolyphosphate, 0.4-5 parts silane coupling agent, and 200-400 parts water. This invention utilizes various industrial wastes such as blast furnace slag, glass powder, red brick powder, and desulfurized gypsum to prepare an all-solid-waste alkali-activated cementitious material. It possesses excellent mechanical properties, outstanding durability, and strong environmental adaptability, improving the utilization rate of industrial solid waste, reducing the use of traditional cementitious materials such as cement, lowering resource dependence and production costs, and promoting the low-carbon transformation of building materials.

The invention discloses a manufacturing method of flexible water-resistant mortar. The manufacturing method comprises the following steps: preparing raw materials, namely weighing cement, quartz sand with different granularities, filler, cellulose ether, nano silicon dioxide, polymer emulsion and auxiliaries; dry mixing and stirring: mixing and stirring the cement, the quartz sand, the filler, the cellulose ether and the nano silicon dioxide; adding water for premixing: adding a proper amount of water into the mixed dry material and uniformly stirring; emulsion addition: adding a polymer emulsion, a coalescing agent and a water repellent, and continuously stirring; adding auxiliaries: adding a water reducing agent, a defoaming agent and a coloring agent, and increasing the stirring speed until the slurry is uniform; according to the present invention, the nano-silica and the water repellent are added to enhance the compactness and the hydrophobicity of the mortar so as to improve the impermeability and the durability of the product, and meanwhile, the ratio of the polymer emulsion to the filler is adjusted, and the segmented stirring process is combined, such that the flexibility of the product is significantly improved, and the cracking phenomenon can be effectively prevented.

This invention discloses a roller-compacted concrete (RCC) for hydraulic engineering and its preparation method, belonging to the field of concrete technology. The RCC for hydraulic engineering of this invention incorporates a basalt fiber-modified micro-expansion component. The preparation method of the basalt fiber-modified micro-expansion component involves cutting basalt fibers into 6-12mm fibers, dry-mixing them uniformly with steel slag powder and magnesium oxide expanding agent, and then spraying emulsified asphalt for surface coating and granulation. This invention's RCC for hydraulic engineering avoids cracking by innovatively adding the basalt fiber-modified micro-expansion component. Simultaneously, this RCC meets the actual needs of hydraulic engineering, exhibiting high compressive strength, good crack resistance, high durability, and high reliability.

This application relates to the field of recycled concrete technology, specifically disclosing the application of construction waste in concrete. The concrete is mainly composed of the following raw materials by weight: 75-85 parts water, 125-145 parts cement, 50-60 parts fly ash, 10-20 parts silica fume, 20-30 parts gypsum, 545-580 parts recycled coarse aggregate from construction waste, 455-485 parts fine aggregate, 5-7 parts redispersible latex powder, and 2-4 parts water-reducing agent; the recycled coarse aggregate is obtained by activating, repairing, and grafting construction waste. This application applies construction waste to concrete, realizing waste recycling, reducing environmental pollution and resource waste, and the resulting concrete has advantages such as high compressive strength, high flexural strength, good impermeability, and good frost resistance, meeting market demands.

The application relates to the technical field of building plugging materials, and particularly provides a long-operable-time plugging material, which is prepared from the following raw materials in terms of total weight: 0.02-3% of a retarder, 0.005-2% of a calcium salt, 0.001-1% of a cellulose ether and cement supplementing to 100%. By optimizing the types of the retarder, the calcium salt and the cellulose ether and by stipulating the relative amounts of the retarder, the calcium salt and the cellulose ether, the quick-setting type plugging material has a relatively long retarding time, and the anti-bending performance, the anti-permeation performance, the bonding performance, the heat resistance and the freeze-thaw cycle resistance of the material after solidification are effectively improved.

This invention discloses a high-ductility concrete component, including a precast concrete house body. The inner wall of the precast concrete house body is connected to a high-ductility mechanism, which includes polyvinyl alcohol fibers, polyethylene fibers, steel fibers, polypropylene fibers, silica fume, ultrafine mineral powder, and limestone powder. This device, by incorporating a high-ductility mechanism into the inner wall of the precast concrete house body, effectively compensates for the insufficient ductility of traditional concrete components, significantly improving the overall crack resistance, collapse resistance, and deformation resistance of the precast concrete house body. The interweaving of polyvinyl alcohol fibers, steel fibers, and polypropylene fibers effectively inhibits the generation and propagation of internal cracks in the concrete, enhances the toughness and impact resistance of the component, prevents breakage due to uneven stress or external impact, extends the service life of the precast house, and improves the impermeability and frost resistance of the concrete, enhancing the adaptability of the precast house to different environments.

This invention belongs to the field of injection molding adhesive technology, specifically relating to an anti-seepage composite admixture, anti-seepage reinforced concrete for drainage pipes, and their preparation method. The composite admixture comprises the following raw materials in parts by weight: 1 part modified aliphatic sulfonate water-reducing agent, 0.15-0.25 parts lignin sulfonate water-reducing agent, and 0.8-1.2 parts expanding agent. The modified aliphatic sulfonate water-reducing agent is prepared by: preparing an emulsion using unsaturated acid anhydride, C14-C18 alkyl acrylate monomer, and emulsifier; simultaneously, preparing an initiator solution for later use; under an inert atmosphere, adding sulfites, formaldehyde (part 1), and water to a reaction vessel, raising the temperature, adjusting the pH, and controlling the temperature to add ketones and formaldehyde (part 2); adding formaldehyde (part 3), simultaneously adding the emulsion and initiator solution, and gradually increasing the temperature during the reaction. The modified aliphatic sulfonate water-reducing agent can stabilize small, closed bubbles, forming a uniformly distributed microbubble system. The three components in the composite admixture synergistically optimize the size, quantity, and distribution of bubbles.

The invention belongs to the technical field of water conservancy and transportation engineering maintenance, and particularly relates to a ship lock concrete surface repairing coating in a seawater soaking environment and a construction method of the ship lock concrete surface repairing coating. Comprising a permeation anchoring bottom coating, a stress buffering middle coating and a super-weather-resistant protective surface coating which are sequentially arranged from inside to outside, and the permeation anchoring bottom coating is a bi-component epoxy-biomineralization composite system. The construction method of the ship lock concrete surface repairing coating comprises the steps that a base plane is diagnosed and cleaned; constructing a negative pressure microenvironment; carrying out in-situ vacuum dehydration and exclusion; negative-pressure prime coat leading-in is carried out; performing controlled ventilation and re-pressing permeation; and constructing a multi-layer system. According to the method, capillary water wedge resistance can be overcome under the condition that a dry base plane does not need to be stopped for a long time, deep penetration and high-strength anchoring of a repairing material to concrete microcracks are achieved, and the chloride ion penetration resistance and durability of a ship lock structure are greatly improved.

The application discloses a kind of fair-faced concrete wall crack repair methods, comprising: preparation bonding slurry, the bonding slurry includes epoxy resin base fluid, curing agent and nano calcium powder filler;The bonding slurry is full irrigation in the crack of fair-faced concrete wall;Along the length direction of the crack, the accommodation groove is opened in the outer side of the fair-faced concrete wall, the position of the accommodation groove corresponds to the position of the crack;Lay anti-cracking mesh on the groove bottom of the accommodation groove, the opposite sides of the anti-cracking mesh are overlapped on the opposite sides of the crack;Fill the fine aggregate concrete layer in the accommodation groove, anti-cracking agent and anti-cracking fiber are mixed in the fine aggregate concrete layer;Coat elastic protective layer on the outer side of the fine aggregate concrete layer.The application solves the existing repair method of fair-faced concrete wall surface, and the problems that the repair effect is not durable and secondary cracking is prone to occur.

The utility model discloses a sleeve pile joint structure for an underground diaphragm wall. The sleeve pile joint structure comprises a secant pile, a first jet grouting pile and a second jet grouting pile, the secant piles are arranged between every two adjacent sections of underground diaphragm walls, one side of each secant pile is connected with the first section of underground diaphragm wall in a secant mode, and the other side of each secant pile is connected with the second section of underground diaphragm wall in a secant mode. The first jet grouting piles are arranged at the joints of the secant piles and the first underground diaphragm wall section, and the second jet grouting piles are arranged at the joints of the secant piles and the second underground diaphragm wall section. Wherein the first jet grouting piles and the second jet grouting piles are located on the soil facing sides of the two adjacent sections of underground diaphragm walls, and the first jet grouting piles and the second jet grouting piles are connected in an engaged mode; the joint is simple in structural design, high in construction efficiency, stable in performance, light in construction disturbance and small in occupied area, and the axial surface environment is powerfully protected.

The application discloses a light autoclaved aerated concrete block and relates to the technical field of concrete blocks.The light autoclaved aerated concrete block comprises the following raw materials: cement, lime, base material, modified palygorskite, calcium sulfate dihydrate, aluminum paste, foam stabilizer and deionized water.In the application, the fibrous structure of the modified palygorskite can form a network framework in the slurry, fill the internal pores and block the capillary channels, so that the overall structural compactness and surface strength of the block are improved, and the drying shrinkage and water absorption are reduced.The alkyl benzene sulfonic acid sodium in the foam stabilizer can reduce the surface tension of the slurry and promote the generation of a large number of bubbles.Nano silicon dioxide can form a rigid support framework in the bubble liquid film to prevent the bubbles from merging or breaking.Polyvinyl alcohol forms an elastic protective film on the bubble surface, prolongs the bubble life, greatly improves the block closed porosity, guarantees the light weight of the block, reduces the drying shrinkage due to the uniformity of the pores, and improves the impermeability and overall strength.

This invention discloses a seepage-proof, low-shrinkage mortar and its preparation method. The seepage-proof, low-shrinkage mortar comprises, by weight, 45-60 parts of seepage-proof, low-shrinkage cementitious material; 130-180 parts of manufactured sand; 1-3 parts of water-repellent agent; and 40-60 parts of water. This invention uses green inorganic materials for preparation, exhibiting a micro-expansion effect, effectively avoiding the problem of large material shrinkage, while also improving the seepage resistance of the cementitious material, thus possessing the advantages of seepage prevention and low shrinkage.

The application provides a composite retaining wall and a construction method thereof, and the composite retaining wall comprises a cantilever module, a gravity module and a drainage system, the cantilever module is a fabricated retaining wall, is assembled by using dense rib prefabricated plates, is embedded at the bottom of a cast-in-place foundation, and the cast-in-place foundation is poured at one time; the gravity module is formed by pouring solidified soil in layers, is a semi-rigid body, and is filled between the cantilever module and a slope surface; the drainage system comprises a drainage mat and a rigid waterproof board, the drainage mat is laid between the slope surface and the gravity module, the rigid waterproof board is vertically arranged between a slope foot and the cast-in-place foundation, the lower part is located below the bottom elevation of the cast-in-place foundation, and the upper part is located in a solidified soil pouring area. The cantilever module and the gravity module of the retaining wall are mutually engaged to form a space-embedded resistance system, have good supporting performance, and have the advantages of a cantilever retaining wall, a downward-inclined retaining wall and an upward-inclined retaining wall; and the drainage system has good water interception and drainage functions.