208 results about "High performance concrete" patented technology

The invention relates to the technical field of data processing, in particular to a BN-based UHPC mix proportion data analysis method and a strength prediction system.The intelligent level of ultra-high performance concrete mix proportion design is improved by introducing a Bayesian network model and a multi-objective optimization algorithm, and the method comprises the steps that firstly, an enhanced feature set is generated through feature engineering; a nonlinear relationship and a cross-level interaction effect among material parameters are fully excavated, and the characterization capability of the model on a complex material system is enhanced; secondly, the Bayesian network model is combined with causal reasoning and a hierarchical regularization strategy, so that the overfitting risk is reduced while the compressive strength prediction precision is ensured; in the multi-objective optimization link, through dynamic weight adjustment and Pareto frontier search, carbon emission and strength requirements are effectively balanced, and candidate schemes with low carbon and excellent mechanical properties are output; and finally, dynamic evaluation and risk analysis are carried out to further screen out a mix proportion with high stability and strong feasibility, and a reliable decision basis is provided for engineering practice.

The invention discloses a local reinforcing device of a marine concrete pile and a construction method of the local reinforcing device, and belongs to the technical field of pile foundation construction engineering.The local reinforcing device comprises a reinforced concrete pipe pile, a steel pipe with an epoxy anti-corrosion coating and annular positioning hoops, and the upper end and the lower end of the outer wall of the steel pipe with the epoxy anti-corrosion coating are each connected with a set of annular positioning hoops; the steel pipe with the epoxy anti-corrosion coating and the reinforced concrete pipe pile are coaxially arranged, the steel pipe with the epoxy anti-corrosion coating is located at the broken pile position of the reinforced concrete pipe pile, and the steel pipe with the epoxy anti-corrosion coating and the reinforced concrete pipe pile are locked through the two sets of annular positioning hoops. By adopting the steel pipe with the anti-corrosion coating, welding the shear nails in the steel pipe, pouring the ultra-high performance concrete UHPC and a corresponding construction method, by utilizing the characteristics of high flowability, high impermeability and early high strength of the ultra-high performance concrete UHPC and combining the interface strengthening effect of the shear nails, the pain point of the traditional technology is accurately solved, and the construction efficiency is improved. And a reliable scheme is provided for ocean engineering broken pile reinforcement.

The invention relates to a digital intelligent regulation and control preparation method of a high-solid-waste low-carbon high-durability concrete connecting material, and solves the problems that an existing UHPC connecting material is difficult to balance high performance and low carbon, the solid waste resource utilization rate is low, a digital intelligent precise regulation and control means is lacked, and the cost is low. The method comprises the following steps: firstly, integrating data to construct a special database for the ultra-high performance concrete, establishing a raw material-process-performance mapping relation through multi-scale simulation, then optimizing target parameters through machine learning, preprocessing the raw materials, and finally obtaining the ultra-high performance concrete after the target parameters are optimized and the raw materials are preprocessed. And verifying the iterative model by using a high-throughput experiment, determining optimal process parameters, importing the optimal process parameters into a system, and executing stirring, forming and curing. The method has the following beneficial effects that high solid waste recycling and low-carbon emission reduction are achieved through digital intelligent regulation and control, high strength and high durability of materials are synchronously guaranteed, and the core application requirements of an assembly type structure are precisely met.

The invention discloses a mechanical property testing device for mixed directional fiber ultra-high performance concrete, which comprises a base, a power mechanism is arranged on the base, fixed rotating components are movably arranged on the left side and the right side of the power mechanism, and the power mechanism drives the fixed rotating components on the two sides to synchronously and reversely move; a supporting assembly is arranged in the middle of the top end of the base. A loading assembly is arranged above the supporting assembly. A test piece is loaded between the fixed rotating assemblies on the two sides, the supporting assembly is used for bearing the test piece, the form of a supporting surface can be changed according to test requirements, and the loading assembly is located on the upper side of the test piece so as to apply vertical pressure to the test piece; the device can acquire various test data such as compression resistance, tension resistance, torsion resistance and wear resistance in real time, can comprehensively reflect the mechanical properties of the mixed oriented fiber ultra-high performance concrete, provides an accurate and reliable test basis for engineering application and performance optimization of such materials, and solves the problems that the existing device has single test data and cannot meet the engineering practice requirements.

The invention discloses a method for predicting mechanical properties of ultra-high performance concrete, particularly relates to the technical field of dynamic property analysis of building materials, and aims to solve the problem that sudden brittle failure of materials cannot be accurately predicted under impact and explosion loads in the conventional method. The method comprises the following steps: calculating a macroscopic stress-strain response based on a continuum mechanical equation by acquiring a material ratio parameter and a dynamic load condition; constructing topological features through the strain energy entropy change rate to locate a damage area; determining an interface debonding energy threshold value and a crack growth rate of the damaged area in combination with interface fracture mechanics; utilizing the law of conservation of energy to establish dynamic correlation between interface debonding energy and strain energy density; when the crack growth rate exceeds an interface debonding energy threshold value, correcting macroscopic response data of a sudden stress drop interval based on the dynamic association relationship; the cross-scale coupling of a microscopic damage mechanism and a macroscopic mechanical behavior is realized, and the prediction precision under a dynamic load is remarkably improved.

The UHPC assembly type machine room structure comprises a machine room enclosure bulkhead cylinder body, a first end cover and a second end cover, wherein the machine room enclosure bulkhead cylinder body is prefabricated by adopting an ultra-high performance concrete UHPC material; the machine room enclosure bulkhead cylinder body is provided with a bottom plate and two side walls, and the machine room enclosure bulkhead cylinder body is provided with a first opening end and a second opening end which are oppositely arranged; the first end cover and the second end cover are respectively arranged at the first opening end and the second opening end; the two end covers are provided with smoke suction and exhaust ports used for being connected with a ventilation pipeline. A machine room access door is arranged on one side wall; an internal smoke exhaust pipeline is arranged in the machine room enclosure bulkhead cylinder body, the two ends of the internal smoke exhaust pipeline are connected with the smoke suction and exhaust ports in the first end cover and the second end cover respectively, and the fan is arranged on the internal smoke exhaust pipeline. The UHPC shell is adopted and serves as an outer enclosure material of the machine room structure at the same time, the functions of enclosure, decoration, structural bearing and partial fire prevention are achieved, and building structure decoration and function integration is achieved.

The invention relates to a UHPC-based fabricated fire-fighting smoke exhaust fan room structure and a construction method thereof, the room structure comprises a main body structure, and the main body structure is prefabricated by adopting an ultra-high performance concrete UHPC material; a fan is arranged in the internal space of the main body structure; the main body structure is provided with a machine room enclosure bulkhead cylinder body and an end cover side wall. Wherein the machine room enclosure bulkhead cylinder body is provided with a bottom plate, a first side wall and a second side wall, the first side wall and the second side wall are connected with the bottom plate and vertically arranged in parallel, and a first opening end and a second opening end which are oppositely arranged are arranged at the two ends of the machine room enclosure bulkhead cylinder body in the horizontal direction respectively; the end cover side wall is provided with a first end cover and a second end cover which are respectively arranged at the first opening end and the second opening end; the first end cover and the second end cover are each provided with a smoke suction and exhaust port, and the smoke suction and exhaust ports are used for being connected with a ventilation pipeline. The UHPC shell is adopted, the advantages of being high in strength and good in fire resistance are achieved, the prefabricated assembly type structure is adopted, construction is convenient, and efficiency is high.

The utility model discloses a permanent and temporary combined assembly type underground structure plate wall connecting node which comprises an assembly type underground diaphragm wall, a full-length steel plate is installed on the side wall of the assembly type underground diaphragm wall, and a prefabricated structure plate is hoisted on the full-length steel plate. The gap between the prefabricated structural slab and the fabricated underground diaphragm wall is filled with ultra-high-performance concrete, and a steel bar structure is arranged in the ultra-high-performance concrete. According to the utility model, the rigid connection between the two prefabricated parts is realized, the integrity of the structure is improved, and the safety and durability of the underground structure are fully ensured; an underground diaphragm wall which is usually used as a temporary structure is changed into a permanent structure, so that the construction period is shortened, and the investment is saved; the ultra-high performance concrete poured in the joint can greatly shorten the anchoring length of the steel bars, enlarge the arrangement distance of the steel bars, obviously reduce the using amount of the steel bars on site and the binding workload, is convenient to install and simple in process, obviously improves the construction efficiency, and has high popularization and application value.

The invention provides a concrete normal section reinforcement design method and system, electronic equipment and a storage medium. The method comprises the following steps: establishing a section stress model containing multi-layer reinforcement strain distribution based on plane section assumption; the stress state of the whole process of the section from axle center compression to axle center tension is simulated by setting strain proportion parameters of the strain of the outermost reinforcing steel bar on the tension side and the limit pressure strain of the concrete; aiming at a plurality of set strain state control points, calculating stress of each steel bar layer position, contribution of the stress to axial force and bending moment and contribution of the stress to a concrete compression area; and based on the section static balance condition, the optimal reinforcement area meeting the design load requirement is determined through iterative calculation, and the configuration constraint of multiple layers of steel bars is considered in the iterative calculation. The method overcomes the defects that a traditional method overestimates the effect of the pressed steel bars and ignores the strain difference of multiple layers of steel bars, and the accuracy and safety of reinforcement design of high-performance concrete structures such as nuclear islands are remarkably improved.

The invention discloses a method for establishing a concrete in-situ mesoscopic finite element model based on a CT (Computed Tomography) scanning technology, which is applied to the technical field of mesoscopic simulation of a concrete structure. The method comprises the following steps: firstly, performing XCT scanning on a steel fiber ultra-high performance concrete test piece to obtain a two-dimensional sequence image of an internal structure of the steel fiber ultra-high performance concrete test piece; then, image processing is carried out through Avizo software, and three-dimensional space distribution information of a base body, steel fibers and pores is segmented and extracted; on the basis of the three-dimensional information, a Python program is utilized to generate a finite element mesh, an eight-node hexahedron unit is adopted in a model, and the established model can accurately reflect real mesoscopic characteristics such as fiber orientation, distribution and pore defects.

The invention relates to the technical field of concrete electric pole manufacturing, and discloses an optimized steel fiber anti-crack ultra-high performance concrete centrifugal electric pole manufacturing method and system. The method comprises the following steps: dividing an electric pole manufacturing process into a plurality of manufacturing units according to production batches, and collecting material component data, process setting data and online detection data in each manufacturing unit to form a multi-source production data set; calculating an anti-cracking performance index and a strength performance index based on a multi-source production data set, and dynamically outputting an initial process correction value through a dual-threshold monitoring mechanism and a performance adjustment model; performing adaptive adjustment on the initial process correction value of each manufacturing unit according to the production correlation between the adjacent manufacturing units to generate an adjusted process correction value; and carrying out serialization processing on the adjusted process correction value, and outputting a production optimization instruction which is applied to a manufacturing execution process. According to the method, electric pole manufacturing whole-process data integration and dynamic process optimization are achieved, and the production efficiency and the product quality stability can be improved.

The invention relates to a composite internal curing material for ultra-high performance concrete and a preparation method of the composite internal curing material. 100 to 160 parts of natural aggregate; 5 to 12 parts of magnesium oxide, 1.5 to 3.5 parts of ammonium dihydrogen phosphate, 1.5 to 5 parts of deionized water and 0.5 to 1.2 parts of carbon nanotube; wherein the magnesium oxide, the ammonium dihydrogen phosphate, the deionized water and the carbon nanotubes are treated to form an MPC / CNT composite coating, and the surface of the natural aggregate is coated with the MPC / CNT composite coating. By means of the MPC / CNT composite coating, water is efficiently stored and slowly released through an internal optimized multi-stage pore structure, and chemical shrinkage in the UHPC hydration process is accurately compensated. Meanwhile, the coating enhances the hydration degree of a matrix and strengthens an aggregate-slurry interface transition area, so that the self-constriction micro-strain is remarkably reduced, and the early cracking risk of the material is fundamentally reduced.

The utility model discloses a permanent and temporary combined prefabricated diaphragm wall type subway entrance and exit structure which comprises a structural side wall which is formed by integrating an enclosure structure and a main body structure, and the structural side wall is an assembled prefabricated diaphragm wall. A first temporary steel support for temporary supporting and a second permanent-temporary combination support for permanent-temporary combination are arranged between the prefabricated underground diaphragm walls, a cast-in-place bottom plate is arranged between the prefabricated underground diaphragm walls, and the second permanent-temporary combination support is located at the elevation position of the top plate. The joint of the prefabricated top plate cross beam and the prefabricated diaphragm wall adopts an ultra-high performance concrete cast-in-place joint, so that the physical performance is excellent, the construction workload is reduced, and the construction difficulty is reduced. The scheme that the water stop strip bags and the UHPC concrete wet joints are connected is adopted between the prefabricated diaphragm wall panels, and the waterproof and guiding effects are achieved under the condition that the steel consumption is effectively reduced. The assembly type prefabricated structure of the station entrance and exit structure is high in proportion.

The invention relates to the technical field of ultra-high performance concrete, in particular to an ultra-high performance concrete strength prediction method considering a particle close packing effect, comprising the following steps: S1, acquiring a data set to be measured, the data set comprising a macroscopic proportioning material and a material particle gradation; s2, according to the particle size distribution of the solid particle material in the data set, calculating the volume percentage of which the cumulative volume is smaller than a preset particle size through a corrected Andersen-Andersen model; s3, calculating the stacking compactness according to the volume percentage with the accumulated volume smaller than the preset particle size; and S4, inputting the stacking compactness and the to-be-measured data set into a prediction model to obtain a predicted value of the compressive strength of the ultra-high performance concrete. And by introducing microstructure quantitative indexes such as grain composition and stacking compaction parameters as model input, the prediction precision and reliability are remarkably improved.

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 technical field of ultra-high performance concrete restrained shrinkage testing, in particular to an ultra-high performance concrete restrained shrinkage testing device, which comprises a rack and a testing mechanism; the testing mechanism comprises a clamp one, a clamp two, a tension sensor, a plurality of strain gauges, a bottom plate one, a bottom plate two and a bottom plate three; a mold mechanism comprises an upper mold plate, a lower mold plate, a plurality of side mold plates and a mold assembling component; the lower mold plate comprises a middle plate, an end plate one and an end plate two; the end plate one and the end plate two are movably inserted on the two sides of the middle plate; a plate changing mechanism comprises a sliding plate and a plate changing component; a lifting mechanism comprises a plurality of lifting components, and the plurality of lifting components are arranged on the two sides of the testing mechanism respectively; the testing mechanism, the mold mechanism, the plate changing mechanism and the lifting mechanism are connected with a controller respectively; the testing device provided by the application realizes the integration of the preparation and the testing process of the concrete test piece based on the principle of end restraint.

The invention discloses a connecting structure of a prefabricated pipe pile and a prefabricated bearing platform, and relates to the technical field of pile foundation engineering. Comprising prefabricated pipe piles; the prefabricated bearing platform is arranged on the top of the prefabricated pipe pile in a sleeving mode, and the prefabricated pipe pile and the prefabricated bearing platform are filled with ultra-high-performance concrete. The lower hoop is arranged outside the prefabricated pipe pile in a sleeving manner, and the lower hoop is connected with the bottom surface of the prefabricated bearing platform; the upper anchor piece is arranged in the prefabricated pipe pile and close to the lower hoop end; the upper anchor piece comprises an anchoring piece arranged in the prefabricated pipe pile and close to the lower hoop end, an upper cover plate is connected to the anchoring piece through a plurality of high-strength bolts, and a pouring hole is coaxially formed in the upper cover plate. The invention has the advantages of definite stress, easiness in installation, high strength and the like.

The invention belongs to the technical field of building material preparation, and particularly relates to a large-volume ultra-high performance concrete block construction method which comprises the following steps: S1, block design and post-cast strip arrangement based on temperature control; s2, a formwork is installed; s3, binding reinforcing steel bars and reserving connecting ends; s4, arranging a thermal insulation layer; s5, concrete pouring; s6, intelligent temperature control maintenance; s7, low-shrinkage post-cast strip pouring is conducted; and S8, removing the template. According to the partitioning construction method, through scientific partitioning design, interface strengthening and intelligent temperature control, the temperature crack risk of the large-size UHPC is remarkably reduced, the structural integrity and durability are improved, and meanwhile the construction efficiency is optimized.

This invention relates to the field of ultra-high performance concrete (UHVPC) curing technology, and more particularly to an intelligent temperature-controlled curing method for UHVPC. The method includes the following steps: generating preliminary temperature-controlled curing data for concrete based on UHVPC mix proportion parameters and temperature-controlled curing requirements data; analyzing the distributed temperature field characteristics of the pouring nodes using UHVPC pouring node data to generate distributed temperature field characteristic data for the pouring nodes; analyzing the temperature evolution and hydration state of the pouring node temperature field based on the distributed temperature field characteristic data and the preliminary temperature-controlled curing data to generate temperature evolution and hydration regulation state data; and performing dynamic temperature-controlled curing analysis on the preliminary temperature-controlled curing data to generate dynamic temperature-controlled curing data for the concrete. This invention achieves intelligent temperature-controlled curing by combining the application of UHVPC.

The utility model discloses a large-diameter prestressed concrete water delivery pipe, which comprises a steel socket ring at one end and a steel socket ring at the other end, and further comprises a UHPC (Ultra High Performance Concrete) inner pipe and a common reinforced concrete outer pipe, the steel spigot ring and the steel socket ring are fixed with the UHPC inner pipe and the common reinforced concrete outer pipe; a spiral prestressed tendon is wound on the outer circumference of the UHPC inner pipe, and the two ends of the spiral prestressed tendon are anchored in the water conveying pipe; a sealing ring for sealing with the inner circumferential surface of the steel socket ring is arranged on the outer circumference of the steel socket ring; annular grooves used for containing the sealing rings are formed in the two end faces of the common reinforced concrete outer pipe. And the two end surfaces of the UHPC inner pipe are also provided with respective annular grooves for accommodating the sealing rings. The water pipe can omit a steel cylinder, has the characteristics of high strength and compactness, high wear resistance, high impermeability, super corrosion resistance and durability of ultra-high performance concrete, and is relatively low in cost, relatively simple in structure, relatively short in production period and relatively high in production efficiency.

The application relates to the technical field of concrete, in particular to gold tailing-based alkali-activated ultra-high performance concrete and a preparation method thereof; the concrete comprises concrete base material, water and fibers; the concrete base material is composed of the following raw materials in parts by weight: 900-950 parts of alkali-activated cementitious materials, 200-220 parts of silica fume, 83-90 parts of machine-made sand, 20-30 parts of gold tailing sand (particle size > 100 mesh) and 4-6 parts of water reducing agent; the mass ratio of the water to the cementitious material is 5.56:1.00; the content of the fibers ranges from 1.0% to 3.0% (volume content); the prepared ultra-high performance concrete has super-high strength, super-long durability and outstanding tensile toughness, and is good in mechanical properties and construction performance. In addition, in the application, the fine part (particle size < 100 mesh) of the gold tailing is used as the raw material of the alkali-activated cementitious material, and the coarse part (particle size > 100 mesh) of the gold tailing is used as the fine aggregate of the concrete, so that the solid waste material is recycled, the comprehensive utilization rate of the tailing is improved, and the green and low-carbon development concept of the building material is met.

The invention belongs to the field of ultra-high performance concrete temperature control, and particularly relates to an ultra-high performance concrete member based on gradient phase change material layering and a preparation method of the ultra-high performance concrete member. The ultra-high performance concrete member comprises an ultra-high performance concrete base body and at least three functional layers. The functional layers are sequentially arranged in the ultra-high performance concrete base body in the thickness direction of the ultra-high performance concrete member. Each functional layer contains a microencapsulated phase change material, and the phase change temperatures of the microencapsulated phase change materials in each functional layer are sequentially reduced in the thickness direction of the ultra-high performance concrete member. The at least three functional layers with different phase transition temperatures are arranged in the thickness direction in a gradient manner, so that accurate matching with the spatial and temporal distribution of the hydration heat of the ultra-high performance concrete is realized. The internal and external temperature difference of the component can be remarkably reduced, the occurrence time of a temperature peak value is delayed, early-stage temperature cracks are effectively inhibited, and the integrality and durability of the component are improved.

The invention belongs to the technical field of building materials, and particularly relates to recycled sand grading optimized ultra-high performance concrete and a preparation method thereof. According to the invention, the reclaimed sand is applied to the ultra-high performance concrete with extremely high requirements on material performance in a breakthrough manner, upgrading and reconstruction of the building solid waste are realized, and the utilization value of renewable resources is greatly improved. Meanwhile, the production cost of the concrete can be remarkably reduced, the CO2 emission is reduced, the strength of the prepared concrete meets the practical engineering use requirement, the application of the reclaimed sand in engineering can be promoted, and the green and high-quality development of the building material industry is promoted. And meanwhile, by controlling the grain composition of the reclaimed sand, gaps among the cementing materials are filled, and the compactness is improved, so that the strength and the durability are enhanced.

The application relates to the field of concrete mixing ratio experiments, in particular to a mixing ratio experiment device and method for ultra-high performance concrete, which comprises a round mold, a feeding cylinder, a limiting assembly, a baffle, a driving assembly, a mounting plate, a knocking hammer, a knocking assembly and a bottom plate. The limiting assembly is used for quickly locking the feeding cylinder and the round mold through cooperation of a pull rod, a spring, a rotating disc, a driving groove, a driving rod and a limiting block; the driving assembly is used for driving the baffle to be synchronously opened and closed through transmission of a knob, a first rotating rod, a cone wheel set and a threaded rod, so that mechanical scraping is realized; and the knocking assembly is used for realizing alternate knocking of the round mold through linkage of a rotating handle, a third rotating rod, a push block, a connecting rod and the knocking hammer. The application has the advantages of convenient assembly and disassembly, reliable sealing, accurate scraping, high efficiency and the like, effectively eliminates bubble interference and human errors, and improves the accuracy, reliability and operation efficiency of the slump experiment of the ultra-high performance concrete.

The utility model discloses a device for detecting the strength of high performance concrete, which comprises a shell assembly, the shell assembly comprises a positioning shell, a support shell, a support frame and a detection piece, the support shell is fixed at the bottom of the positioning shell, the support frame is fixed between the tops of the positioning shell, and the detection piece is fixed on the support frame. The detection piece is arranged at the bottom of the support frame; and a clamping assembly. The concrete strength testing device has the advantages that the concrete strength can be conveniently tested through the shell assembly, the periphery of the concrete can be protected in the testing process, the concrete is prevented from collapsing to the body of a worker in the pressure testing process, the concrete of different specifications can be clamped and fixed in four directions through the clamping assembly, and the working efficiency is improved. The four-direction clamping can reduce the phenomena of deviation, inclination and the like of the test piece in the testing process, and ensures that the loading axis is consistent with the axis of the test piece, so that the compressive property of the concrete is accurately reflected.

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 invention relates to the technical field of traffic infrastructures, and discloses an ultra-high performance anti-corrosion treatment anti-collision guardrail and a construction method thereof.The anti-collision guardrail comprises a prefabricated UHPC protection plate, a prefabricated ultra-high performance concrete (UHPC) protection plate, a prefabricated ultra-high performance concrete (UHPC) protection plate, a prefabricated ultra-high performance concrete (UHPC) protection plate and a prefabricated ultra-high performance concrete (UHPC) protection plate, the post-poured concrete is combined with the inner surface of the prefabricated UHPC protection plate; the protective plate and reinforcing steel bar connecting piece is pre-buried in the prefabricated UHPC protective plate, and a hole for a guardrail reinforcing steel bar framework to penetrate through is formed in the protective plate and reinforcing steel bar connecting piece; the protection plate bottom long round hole is formed in the bottom of the prefabricated UHPC protection plate; and the anti-collision guardrail steel member is arranged at the top of the post-poured concrete. Through dual positioning of the pre-embedded connecting piece and the long round hole, and combination of inner surface roughening and a fiber-free protection layer, the construction precision, the structural bonding strength and the durability are improved.

The present application relates to a kind of detachable combined steel bridge deck pavement structure, including steel bridge deck, corrugated steel plate, T-shaped stiffener, ribbed steel bar, ultra-high performance concrete, asphalt concrete wearing layer, high-strength bolt;Wherein, the corrugated steel plate is connected with the top plate of steel bridge deck by high-strength bolt in flat section, and corrugated section is arranged corresponding to longitudinal stiffener of steel bridge deck;The web of T-shaped stiffener is perforated, and the weld is connected with the flat section of corrugated steel plate in the direction of bridge;The ribbed steel bar is passed through the web of T-shaped stiffener perforated, then pours ultra-high performance concrete, realizes and steel bridge deck joint action;Finally, pour asphalt concrete wearing layer, form detachable combined steel bridge deck pavement structure.The present application provides a kind of detachable combined steel bridge deck pavement structure design reasonable, with the advantages such as large rigidity, light weight, easy to disassemble, can effectively improve the fatigue performance of steel bridge deck.

The application relates to long-afterglow light-emitting concrete and a preparation method thereof, and belongs to the technical field of building engineering materials. The long-afterglow light-emitting concrete is prepared from the following components: cementitious material 420-485 parts by weight, water reducing agent 8-10 parts by weight, long-afterglow light-emitting material 5-10 parts by weight, admixture 5-7.5 parts by weight, and water 50-80 parts by weight. The long-afterglow light-emitting material is combined with high-performance concrete, the light penetration and excellent light-emitting performance of the long-afterglow light-emitting material are utilized, and high-performance long-afterglow light-emitting concrete with high strength and long afterglow time is obtained, which can be used in the fields of emergency passage indication, weak light illumination, building decoration and art crafts.

The present application relates to the technical field of concrete, in particular to a high-performance concrete mixture for power plants and a construction method thereof. The interface-hydration synergistic regulation technology is adopted, in which cementitious materials, water, river sand and continuously graded gravel are used as the matrix, and poly-carboxylic acid water reducing agent, crystal nucleus slurry A / B and zwitterionic-hydrophobic copolymer brush modified silica particle B are alternately added in stages to pre-coat and synchronously disperse the coarse aggregate, so that the concrete with long-time slump retention, low bleeding, high early and long-term strength, significantly reduced electric flux and chloride ion permeability, improved sulfate erosion resistance and volume stability is obtained under the conventional mixing and pumping conditions. The in-mold temperature, layered pouring thickness, vibration frequency and curing time limit are specified to ensure the engineering implementability and durability, and the concrete is suitable for power plant structures in high-temperature, high-humidity and chlorine-containing environments, and the construction is reliable and the maintenance is convenient.