102 results about "Ultra high performance" patented technology

The utility model provides a kind of assembled double-column pier, including cap beam, column and pile foundation are sequentially arranged below cap beam, first tenon is symmetrically set in the left and right sides of the lower surface of cap beam, first mortise and second tenon are respectively set in the upper and lower surfaces of column, pile foundation reinforcing section is set on the upper end of pile foundation, second mortise is equipped at the top surface of pile foundation reinforcing section and opposite column, the periphery of first tenon is filled with self-compacting super high performance concrete from the bottom of first mortise to the top of first tenon, the periphery of second tenon is filled with self-compacting super high performance concrete from the bottom of second mortise to the top of second tenon, the utility model replaces longitudinal, transverse reinforcement in the prior art by self-compacting super high performance concrete, on the basis of ensuring the integrity and stability of assembled double-column bridge, it does not need to reserve and arrange reserved reinforcement at mortise and tenon connecting part in bridge assembling construction process, can greatly shorten project duration, improve the economic benefit of project.

The application relates to the field of concrete, and particularly discloses a kind of ultra-high performance concrete and a preparation method thereof. Each volume part of the ultra-high performance concrete comprises the following components by weight: 210-250 parts of water, 800-950 parts of cement, 150-250 parts of silica fume, 150-800 parts of quartz sand, 250-750 parts of graphite tailings, 200-300 parts of silica powder, 100-200 parts of steel fiber, and 10-100 parts of water reducing agent. The ultra-high performance concrete has good mechanical properties, electrical conductivity and self-sensing performance.

1. Name of the designed product: packaging box (ultra-high performance concrete UHPC mortar). 2. Use of the designed product: for packaging products. 3. Design points of the designed product: in the combination of shape and pattern. 4. Picture or photo best indicating the design points: front view.

The application discloses a modular prestressed storage tank and a mounting method, relates to the technical field of storage tank construction, and realizes rapid, efficient and high-quality construction by decomposing a storage tank wall into standardized prefabricated module units and adopting innovative prestressed connection and super-high-performance concrete pouring on site. The construction mode not only greatly shortens the construction period, reduces the construction risk, improves the construction precision and safety, but also significantly enhances the overall structural integrity and airtightness of the storage tank, and provides a more advanced and reliable solution for large-scale storage of LNG and other media.

This invention discloses a method for preparing and applying high-temperature heat-absorbing artificial aggregate. The method includes: placing a molten and cooled high-temperature heat-absorbing material in paraffin wax and stirring to obtain a paraffin-coated high-temperature heat-absorbing material; sequentially cooling and air-drying the paraffin-coated high-temperature heat-absorbing material obtained in the above steps; and finally, using cement and epoxy resin to perform a secondary encapsulation of the paraffin-coated high-temperature heat-absorbing material to obtain the high-temperature heat-absorbing artificial aggregate. The preparation method of this invention is simple and has good application prospects. The cement and epoxy resin used in the prepared high-temperature heat-absorbing aggregate serve as the outer shell of the aggregate, ensuring that the high-temperature heat-absorbing material inside the aggregate does not leak out at room temperature and can absorb heat at high temperatures. This effectively slows down the temperature rise inside ultra-high performance concrete, reduces thermal damage to ultra-high performance concrete, reduces crack formation, and improves the high-temperature performance of ultra-high performance concrete structures.

The utility model provides an ultra -high performance concrete pile relates to concrete pile technical field, including UHPC concrete pile body and the metal fiber in the UHPC concrete pile body, the admixture of metal fiber is 2.1%~4%v / v, at least 80% admixture of metal fiber is along the UHPC concrete pile body axial even distribution. Can prevent the invasion of seawater or groundwater to produce erosion to the pile inner wall. UHPC concrete is high in compressive strength, and the metal fiber in the pile body is evenly distributed along the axial direction of the pile body, through high fiber admixture, the axial tensile strength of UHPC concrete can reach more than 2 times of ordinary C80 concrete; the crack bending moment of UHPC pipe pile is improved by more than 90% than PHC pipe pile, and the ultimate bending moment is improved by more than 38%. The technical problem that the bending resistance of the pipe pile is greatly reduced due to the uneven distribution of metal fibers in the pipe pile when UHPC is applied in pipe pile production in the prior art is solved.

This utility model discloses a tiered energy-dissipating anti-ship collision system based on metamaterial structures, including an ultra-high performance concrete panel, a tiered energy-dissipating anti-collision layer, a rubber fender, bridge piers, bridge abutments, and bridge pile foundations. The tiered energy-dissipating anti-collision layer includes variable stiffness units, lightweight energy-dissipating materials, vertical steel plates, an upper top plate, and a lower bottom plate. The variable stiffness unit is composed of multiple concave hexagonal units connected by transverse and longitudinal steel plates, with the hollow structure in the middle filled with lightweight energy-dissipating materials such as polyurethane foam, ceramsite, and rubber granules that can absorb and disperse impact energy. The variable stiffness units are welded to the steel plates to form a whole, and the protective device is connected to the protected bridge pier through the rubber fender. The overall stiffness of the protective device increases with structural deformation upon impact, thus this utility model has a variable stiffness tiered energy-dissipating anti-collision effect, effectively prolonging the collision time between the ship and the bridge and reducing the impact force of the ship, achieving two-way protection for both the ship and the bridge.

This invention discloses a method for improving the crack resistance of ultra-high performance concrete structures, relating to the field of concrete materials. The invention involves bonding polylactic acid (PLA) fibers and metal fibers with polyurethane adhesive to form a composite fiber. After treatment with polyurethane adhesive, the composite fiber forms a three-dimensional support network, which is alternately laid with a fine slag layer to form a gradient structure, effectively inhibiting the initiation and propagation of microcracks. The cementitious system, combined with composite admixtures, reduces the heat of hydration, and the micropores of the fine slag buffer shrinkage stress, significantly reducing shrinkage cracking. The self-healing microcapsules loaded with fine slag are uniformly dispersed, releasing a repair agent when cracks occur, rapidly healing microcracks, significantly restoring mechanical properties and impermeability, and improving durability. Furthermore, under the alkali-activated effect during the PLA fiber curing process, the fine slag can bond tightly with the composite fiber, achieving a synergistic "crack prevention-repair" effect, adapting to the construction of complex components, reducing material costs, shortening the curing cycle, and significantly reducing the total life-cycle cost.

This invention discloses an ultra-high performance fiber-reinforced concrete and its preparation method, belonging to the field of concrete technology. By acid etching of high-silica glass fibers with sulfuric acid and nitric acid, the surface roughness of the fibers is increased, and a large number of active groups such as hydroxyl groups are introduced, providing reaction sites for subsequent dopamine grafting. This solves the problems of strong surface inertness and weak interfacial bonding between glass fibers and the concrete matrix. Compared with traditional concrete, the internal structure is highly dense, with high compressive strength and is not easily corroded by alkaline media. Furthermore, this invention forms a highly active adhesive coating on the fiber surface by covalently bonding the catechol groups of dopamine with the hydroxyl groups on the fiber surface. Simultaneously, the amino and phenolic hydroxyl groups of the dopamine coating act as bridges, enhancing the bonding force between the fiber and subsequent silanes and bentonite, significantly improving the interfacial compatibility between the fiber and the concrete matrix, and reducing the risk of interfacial debonding under stress.

The present application relates to the technical field of ultra-high performance cement-based composite material, and particularly relates to an ultra-high performance concrete and a preparation method thereof, the preparation method comprising: mixing part of limestone powder, part of mixing water and part of polycarboxylate superplasticizer to obtain limestone powder dispersion slurry through pre-dispersion treatment; mixing the remaining limestone powder, cement, silica fume, quartz powder and quartz sand, and then adding the mixture into the limestone powder dispersion slurry in batches, and then adding the remaining mixing water and the remaining polycarboxylate superplasticizer to obtain slurry; adding steel fibers into the slurry in batches, and then shaping and curing in stages to obtain the ultra-high performance concrete. 2+ The present application forms a local environment of enrichment, heterogeneous nucleation and particle filling around the steel fibers through the above preparation process, promotes the deposition and growth of hydration products in the transition zone of the fiber and the matrix interface, effectively reduces the interface porosity, and improves the interface bonding strength, the peak pullout load and the post-peak friction energy dissipation capacity.

This invention discloses a green printing process for label polyester film, comprising the following steps: (1) Cutting: batch cutting; (2) Preheating; (3) Static electricity removal treatment; (4) Coating: applying polyester film to the label surface; (5) Cutting; (6) Horizontal and vertical fixing and stretching; (7) Corona treatment; (8) Coating and printing: the polyester film-coated label is preheated to 80-110 degrees Celsius, and then coated and printed. A drying box is set at the rear of the coating and printing device for drying, and a gas collection and treatment device is set at the top of the drying box; (9) Rewinding and packaging. Through the above method, this invention enables the label to be coated with ultra-high performance polyester film, and the polyester film printing process is green and environmentally friendly. The preheating process is used before and after printing the coated label to ensure the quality of the printing process. After printing, the label is dried in a drying box with an ultra-long spiral feeding mechanism, and the finished product is directly output. The drying box is equipped with a gas treatment device for treatment, which is green and environmentally friendly.

This invention discloses a C180 grade ultra-high performance concrete, comprising the following components by mass percentage: 42%-48% composite cementitious material; 45%-50% graded fine aggregate; 5.5%-6.8% copper-plated steel fiber; 0.8%-1.2% polycarboxylate superplasticizer; and 2.6%-3.4% water. The composite cementitious material is composed of P.O52.5 grade cement, high-purity silica fume, Class I fly ash (F grade), fly ash microspheres, and nano-silica in a mass ratio of 68:16:8:11:0.3. This invention solves the problems of C180 grade concrete, which, while reducing component size, lowering self-weight, and extending service life, suffers from difficulty in balancing strength development and steam curing efficiency. Conventional steam curing fails to fully unleash the potential of admixtures, leading to long production cycles. Furthermore, it addresses the issues of poor production stability, high raw material sensitivity, and performance fluctuations caused by aggregate and cementitious material variations and uneven fiber dispersion, thus hindering large-scale application.

The application discloses an aluminum-UHPC combined bridge pier anti-collision device with a hydraulic power generation function, which comprises a plurality of energy absorption units, a plurality of power generation units, a sliding unit and a fixing assembly; the energy absorption unit comprises a first shell, a first strong magnet group, a second buffer layer, a corrugated plate, a first buffer layer and ultra-high performance concrete are arranged in the inner cavity of the first shell; the power generation unit is located on the inner side of the energy absorption unit; the power generation unit comprises a second shell and a second strong magnet group, the second strong magnet group is installed in the second shell, and an electric wire is wound on the second strong magnet group; the sliding unit comprises a plurality of annular guide rails, a plurality of horizontal rollers and a plurality of vertical rollers; the plurality of horizontal rollers are slidably connected along the plurality of annular guide rails; the fixing assembly comprises a plurality of flow resistance plates and a plurality of fastening parts. The application can effectively reduce the water pressure borne by the bridge pier, significantly reduce the risk of the bridge pier being seriously damaged by the ship collision, and has the advantages of multiple functions, outstanding energy consumption effect, strong adaptability, long service life and the like.

This invention discloses a special synergist for sprayed ultra-high performance concrete (UHPC) in high-altitude and cold regions and its preparation method, belonging to the field of concrete admixture technology. Addressing the technical shortcomings of existing sprayed UHPC in high-altitude and cold environments, such as poor rheological properties, slow setting, low early strength, and large shrinkage, as well as the inability of existing admixtures (including high-altitude accelerators and UHPC thixotropic agents) to synergistically solve these problems, this invention provides a functionally integrated special synergist through a multi-component synergistic design of a composite thixotropic system, an expansion and shrinkage reduction system, a nano-early strength system, and an antifreeze system. This synergist can reduce the rebound rate of sprayed UHPC to below 5% in environments ranging from -20℃ to 5℃, increase the 3-day compressive strength by more than 40%, and reduce the shrinkage rate by more than 30%, effectively meeting the construction and quality requirements of tunnels, slope protection, and other projects in high-altitude and cold regions. The preparation process of this invention is simple, the cost is controllable, and it has broad application prospects.

The application discloses a kind of batch production device and method of UHPC steel fiber formwork, it is related to the technical field of ultra-high performance concrete, the device includes fiber carding and positioning system, fiber tensioning system, mould box forming system, sealing and perfusion system, fiber carding and positioning system include guide rod and two end positioning plates and multiple intermediate production plates that are passed in the guide rod, and multiple intermediate production plates are spaced distribution between two end positioning plates that are spaced, multiple array distribution through holes are formed on the end positioning plate and intermediate production plate, and the through hole on end positioning plate and intermediate production plate is mutually aligned;Fiber tensioning system, it includes the fixed part that is arranged on the outer side of the end positioning plate, for the steel fiber that is passed in the through hole of the intermediate production plate and end positioning plate, and end is fixed from end positioning plate out.This application can realize batch production of UHPC steel fiber formwork, improve production efficiency.

This invention discloses a mobile ultra-high performance concrete spraying machine, belonging to the technical field of bridge material construction equipment. It includes a vehicle body assembly and a spraying assembly installed at the front of the vehicle body assembly. The spraying assembly includes a frame body, on the upper surface of which a vertically arranged material leveling mechanism and a tilting mechanism are installed. Above the material leveling mechanism is a stirring mechanism and a material storage mechanism, wherein one end of the stirring mechanism is movably connected to the tilting mechanism, allowing the stirring mechanism and the material storage mechanism to tilt towards their movably connected end to open the material leveling mechanism. A motor is installed directly below the material leveling mechanism, with its shaft passing through the material leveling mechanism and drivingly connected to the stirring mechanism. A spraying pipe is connected to the front of the material leveling mechanism. The modular layout of the material leveling mechanism and the stirring mechanism, along with the linkage design of the stirring mechanism and the tilting mechanism, allows for quick opening of the material leveling mechanism for cleaning or maintenance, preventing the mixing of dried UHPC with new material and ensuring stable performance of the sprayed layer.

This invention relates to a method for establishing a constitutive model of localized bond in ultra-high performance concrete (UHPC) structures and its finite element method implementation. Firstly, based on the energy release rate per unit crack surface, a coarse aggregate-fiber competitive fracture index is proposed. Based on this, a multi-field coupled effective fiber weighting function is constructed, explicitly incorporating factors such as coarse aggregate volume fraction, particle size, tensile strength, fiber content, bond length ratio, and cover thickness ratio. Furthermore, an internal state variable representing the degree of coarse aggregate participation is introduced within a four-stage bond-slip framework, expressing the bond stress as a superposition of three parts: matrix, fiber bridging, and coarse aggregate-rib mechanical interlocking. A dedicated UHPC-CA-reinforcement interface element and numerical implementation scheme are designed, which can improve the accuracy and engineering usability of the analysis of anchorage and lap zone in UHPC containing coarse aggregate.

This invention discloses an air-storage cavern structure based on UHPC lining and distributed optical fiber, and its monitoring method, belonging to the field of underground cavity engineering technology for air-storage. The structure includes a concrete lining structure set on the inner wall of the natural cavern; a concrete reinforcement structure set on the inner side of the concrete lining structure, forming an energy storage chamber inside; and an optical fiber sensor embedded in the airtight protective layer. By integrating ultra-high performance concrete layered lining with distributed optical fiber sensors, a cavern gas storage system integrating structural load-bearing, multiple sealing and intelligent sensing is constructed. Based on a coupled deformation model and a leakage threshold model, a multi-dimensional early warning index and a graded early warning mechanism are established to accurately capture early micro-damage and gas leakage precursors, and automatically generate maintenance plans. This effectively solves the technical problems of the disconnect between high-performance sealing materials and intelligent monitoring systems, and the inability to identify early hidden damage in a timely manner.

This utility model provides a coating structure suitable for ultra-high performance concrete curing, relating to the field of concrete curing technology. It includes a moving mechanism comprising a mounting frame, a reinforcing frame at the bottom of the mounting frame, two moving rollers on both sides of one end of the reinforcing frame, an auxiliary roller at the end of the reinforcing frame away from the moving rollers, an extension frame within the reinforcing frame at the bottom of the mounting frame, a pusher on the same end of the reinforcing frame and the moving rollers, and a wetting mechanism on the mounting frame. This utility model allows control of the water pump's on / off switch, enabling the pump to draw curing liquid from the storage tank through a temporary storage chamber into the pump and then spray it out through a spray pipe. A corresponding coating mechanism is located within the reinforcing frame at the bottom of the mounting frame. Workers can weld one end of the coating frame to the bottom of the mounting frame and place the coating roll on the outer surface of the fixed coating roll. During movement, the coating roll on the outer surface of the fixed coating roll will coat the ground, thus further enhancing its practicality in actual use.

This invention discloses a method for reinforcing existing reinforced concrete floor slabs for eVTOL (Emergency Virtual Transport Operator) landing pads against punching shear, belonging to the field of civil engineering reinforcement technology. The method includes: first, calculating the equivalent dynamic impact load based on eVTOL takeoff and landing parameters and the existing floor slab condition; second, using a modified punching shear failure angle model based on stiffness gradient, sequentially calculating the modified punching shear angle, quantitatively designing the thickness of the upper ultra-high performance concrete (UHPC) layer and the amount of the lower fiber-reinforced polymer (FRP) layer and the anti-peeling anchor density; finally, implementing a composite reinforcement construction method of "upper layer and lower layer" according to design specifications. This method significantly improves the punching shear resistance of the existing floor slab by introducing a high-stiffness UHPC layer in the upper part of the existing floor slab to expand the punching shear cone angle, and by setting an FRP layer and anti-peeling anchors in the lower part to limit crack propagation. Through the synergistic effect of the upper and lower layers, it achieves rapid reinforcement and renovation of low-altitude aircraft landing pads.

The application provides a kind of wave-damping caisson opening wall cross-scale optimization design method and device, comprising: material microscopic representative body element model establishment module.For building the material microscopic representative body element model of ultra-high performance concrete;Material macroscopic elastoplasticity constitutive relation numerical model establishment module, for building the material macroscopic elastoplasticity constitutive relation numerical model of ultra-high performance concrete, and realizing the stress strain update of ultra-high performance concrete material unit;Opening wall component design module, for designing opening wall component, and using static elastoplasticity analysis method to determine the ultimate bearing capacity of opening wall component with ultra-high performance concrete material;Wave-damping caisson design module, for designing wave-damping caisson, and using opening wall component with ultra-high performance concrete material as the opening front wall of wave-damping caisson.The application can effectively realize the safety comprehensive optimization of opening caisson structure.

The present application relates to the technical field of concrete, and in particular to a self-repairing super high performance conductive concrete and a preparation method thereof, raw materials including, by weight, 1000 parts of cementitious material, the cementitious material being composed of 800 parts of 525 Portland cement and 200 parts of silica fume; 900 parts of filler, the filler being composed of 100 parts of 200-300 mesh quartz powder and 800 parts of 40-70 mesh quartz sand; the present application successfully integrates three functions of super high performance (compressive strength > 120 MPa), self-repairing (SMA driven) and conductivity (double fiber network) in one material; efficient self-repairing: using the shape memory effect of NiTi alloy fiber, small cracks can be actively closed, and the repair efficiency is good, and the performance can be repeatedly triggered.

The application discloses a kind of super high performance concrete component regional performance evaluation methods, belong to data analysis technical field.The super high performance concrete component regional performance evaluation method includes the following steps: corrosion state information of UHPC component in service state is collected;According to corrosion state information, component is divided into three kinds of regions of complete corrosion area, transition corrosion area and uncorrosion area;Structural performance related index is extracted in each corrosion area respectively, corrosion induced interface slip damage model is established, and slip damage factor is obtained;According to the slip damage factor and residual bearing capacity retention rate of each region, performance grade division standard is established, each region is judged as I, II or III performance grade;The regional performance grade evaluation result of component is output.The super high performance concrete component regional performance evaluation method disclosed in the application can solve the problem that the existing method is difficult to accurately evaluate the regional performance of the component.

The application relates to the technical field of concrete, in particular to a high-cold-region super-high-performance UHPC (Ultra High Performance Concrete) and a preparation method thereof, which is prepared from the following raw materials in parts by weight: 480-560 parts of aluminate cement, 20-40 parts of an additive, 45-75 parts of a functional additive, 520-580 parts of quartz sand, 70-80 parts of steel fiber, 12-20 parts of polycarboxylate superplasticizer and 100-120 parts of water. In the application, the additive is composed of added powder and pretreated boron mud. After being refined, the particles of the added powder can effectively fill the cement paste. After being activated by a soap nut powder solution, the pretreated boron mud provides active chemical components to generate more stable calcium silicate hydrate gel products. Under the dual action of the added powder and the pretreated boron mud, the overall compactness of the concrete is significantly improved, so that the concrete shows stronger compressive capacity when bearing extremely high load, and the service life of the concrete is prolonged.

The utility model provides a kind of high-performance composite water delivery pipeline, the structure includes from inside to outside: inner fiber reinforced composite material (FRP) pipe, inner concrete layer, inner steel pipe, shear nail, inner ultra high performance concrete (UHPC) layer, prestressed reinforcement, outer UHPC layer and outer FRP pipe.The utility model has the advantages of high pressure-bearing capacity, excellent durability, long service life, low maintenance cost and strong extreme load resistance by the above multilayer composite structure design, especially suitable for urban pipe network, long-distance water delivery, water power generation water diversion system, submarine water delivery, corrosive medium transportation and other fields with strict performance requirements for pipeline.

This invention belongs to the field of building materials and electromagnetic shielding technology, specifically disclosing a recycled fiber-reinforced sulfoaluminate cement-based ultra-high performance concrete for retired wind turbine blades and its preparation method. This ultra-high performance concrete comprises sulfoaluminate cement, rice husk ash, silica fume, quartz powder, fine aggregate, retarder, dispersant, polycarboxylate superplasticizer, modified recycled carbon fiber, modified recycled glass fiber, and water. The modified recycled carbon fiber and modified recycled glass fiber are respectively obtained by surface magnetization, in-situ growth of conductive nanonetworks, and silane modification of the recycled fibers. This invention achieves high-value closed-loop resource utilization of waste wind turbine blades, not only avoiding environmental pollution from landfill and incineration, but also providing the wind power industry with a circular economy model of "blade-concrete-wind power facility," which can be directly used in structural parts such as wind turbine towers and nacelle covers.

This utility model relates to a thin composite slab with precast convex ribs, comprising: a precast base slab cast from ultra-high performance concrete, the base slab consisting of a thin precast slab and convex ribs at its bottom, the two ends of U-shaped bars within the convex ribs penetrating the top of the thin precast slab, a cast-in-place reinforced concrete layer being cast on top of the thin precast slab in the base slab, the two ends of the U-shaped bars lapping with the bottom bidirectional reinforcing bars in the cast-in-place reinforced concrete layer, and multiple convex ribs at the bottom of the thin precast slab distributed parallel to the bottom main reinforcing bars in the cast-in-place reinforced concrete layer. The beneficial effects are: solving the problems of existing precast composite slab truss reinforcement affecting pipeline laying and installation, and the interlocking and overlapping of floor slab reinforcement, improving construction and installation efficiency; solving the problems of reinforcement extension within the precast base slab in existing composite slabs interfering with the reinforcement of beams, walls, and columns, custom opening of precast molds, and installation; effectively reducing the thickness of the composite slab; and effectively saving resources.