16 results about "High strength concrete" patented technology

This invention relates to a rapid-setting high-strength concrete and its preparation method. The rapid-setting high-strength concrete comprises the following raw materials in parts by weight: 100-200 parts cement, 80-100 parts coarse aggregate, 40-60 parts fine aggregate, 10-20 parts rubber powder, 20-30 parts modified straw-based carbon powder, 0.3-0.5 parts coupling agent, and 0.6-0.8 parts water-reducing agent. The modified straw-based carbon powder is obtained by first adding straw powder to an activation solution containing aluminum sulfate, carboxymethyl starch, and triethanolamine, followed by activation, ball milling, and freeze-drying to obtain a precursor. The precursor is then mixed with flake aluminum powder and heated under an inert atmosphere to obtain the final product. The mass fraction of aluminum sulfate is 5-10%, the mass fraction of carboxymethyl starch is 5-10%, and the mass fraction of triethanolamine is 3-5%. This invention improves the rapid setting effect, compressive strength, flexural strength, and crack resistance of concrete by incorporating modified straw-based carbon powder into the concrete components. This is of great significance for improving the overall performance of concrete and developing infrastructure construction.

The utility model discloses a prestressed concrete steel bar truss composite board, including prefabricated prestressed bottom layer, steel bar truss layer and cast-in-situ composite layer, its characterized in that: the top fixed connection of prefabricated prestressed bottom layer has steel bar truss layer, and the outside of steel bar truss layer and located the top pouring of prefabricated prestressed bottom layer has cast-in-situ composite layer, and the main body of prefabricated prestressed bottom layer is high -strength concrete pouring board. The utility model discloses through the innovative configuration of six straight steel strands and steel strand ring combination structure of prestressed steel strand, can form bidirectional prestressed system when the prefabricated bottom board bears load, and steel strand ring effectively restricts concrete transverse deformation, and straight steel strand provides longitudinal pre -stress, and the synergistic effect makes the bottom board crack resistance improve, adopts micro -inflation concrete pouring composite layer and through interface agent and enhances interlayer adhesion, solved the technical problems that traditional composite board is easy to appear interlayer peeling under the action of temperature difference shrinkage.

The application discloses fly ash and cement based aggregate-free high-strength concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is made of the following raw materials in parts by mass: 50-70 parts of 42.5 grade and above Portland cement, 15-25 parts of fly ash, 15-25 parts of silica ash, 0.5-3.0 parts of high-performance composite foaming agent, and the total water-binder ratio is 0.25-0.40. The preparation method comprises the following steps: uniformly dry mixing the cementitious material and admixture, then adding water and stirring to form a slurry; uniformly mixing stable foam prepared by physically foaming the foaming agent into the slurry; and pouring and performing combined curing of standard curing and steam curing. The application controls the dry density of the concrete at 800-1600 kg / m3, and the 28-day compressive strength is stabilized at more than 10 MPa under the condition of no traditional sand aggregate, by optimizing the ratio of the ternary cementitious system of cement-fly ash-silica ash, using high-performance foam stabilizer and strictly controlling the low water-binder ratio, so that the problems of low strength and poor durability of the existing aggregate-free concrete are solved.

This invention discloses a modular collaborative casting method for basalt fiber reinforced cages and steel structures on offshore platforms, belonging to the field of marine engineering technology. The method includes steps such as the preparation of prefabricated modules, classification and splicing of prefabricated modules, and on-site assembly of floating pontoons. It also proposes optimized solutions for enhanced sealing treatment, internal rebar installation, external rebar installation, and overall encapsulation with ultra-high performance concrete. This invention can use low water-cement ratio, high impermeability and compressive strength concrete materials to perform integrated external casting of the prefabricated module splices, forming a seamless integral structure. This avoids the high cost of using all ultra-high strength concrete and completely solves the technical bottlenecks of traditional modular floating pontoons, such as joint leakage, poor structural integrity, and easy corrosion of metal connectors. It achieves a balance between excellent durability, ultra-high safety, and economic efficiency throughout the entire life cycle for marine floating structures, and is suitable for major facilities such as large floating wind power platforms in deep-sea areas.

This utility model relates to the field of sports facility construction technology, and in particular to a durable hybrid running track. This utility model provides a durable hybrid running track comprising a wear-resistant layer, a rubber granule layer, an adhesive bonding layer, a skeleton bonding layer, a reinforcing mesh layer, a rebound filler layer, a hydrophobic layer, a prefabricated installation structure layer, and a concrete base. The concrete base serves as the foundation load-bearing part of the track, and is pre-cast with high-strength concrete underground. The prefabricated installation structure layer is installed on top of the concrete base. The hydrophobic layer is located above the prefabricated installation structure layer and is flush with the ground. Above the hydrophobic layer, the rebound filler layer and the reinforcing mesh layer are sequentially arranged, with the rebound filler layer located between the hydrophobic layer and the reinforcing mesh layer. Stress-absorbing modules are also provided on the upper and lower sides of the rebound filler layer. The wear-resistant layer uses highly wear-resistant materials, which can effectively resist friction wear from shoe soles and other materials during long-term use, reducing the frequency of repair or replacement due to surface wear.

The utility model discloses a kind of magnetic adsorption combined ground paving stones, multiple ground paving stone bodies longer side is respectively equipped with neodymium iron boron permanent magnet and low carbon steel ferromagnetic sheet, and splicing is realized by magnetic adsorption, and the permanent magnet with residual magnetism intensity ≥1.2T, coercive force ≥800kA / m ensures that adsorption is firm, shorter side is equipped with side, and aluminum alloy lap frame is engaged rubber protection column thereon, prevent pedestrian from colliding and enhance the strength of splicing, ground paving stone body includes high-strength concrete base layer with compressive strength ≥40MPa from bottom to top, glass fiber reinforced plastic support layer, antiskid surface layer with surface friction coefficient ≥0.7, interlayer is fixed with epoxy resin adhesive with shear strength ≥12MPa, side, lap frame, protection column and the like structure parameter are optimized design, and ground paving stone corner is rounded with 3-5mm.The combined ground paving stone is installed conveniently, and it is stable, with antiskid, protection function, applicable to a variety of places ground laying.

This invention discloses a prestressed high-strength concrete sewage pipe, comprising a sealing ring, locking components, a prestressed high-strength concrete pipe section, a spigot pipe section, and a socket pipe section. Both the spigot and socket pipe sections are made of ductile iron. The spigot pipe section includes a flange plate and a spigot. The flange plate is fixedly connected to the front end face of the prestressed high-strength concrete pipe section, and the spigot is fixedly connected to the front side of the flange plate. The socket pipe section is fixedly connected to the rear end face of the prestressed high-strength concrete pipe section. The socket pipe section has a tapered surface that expands backward along its inner circumference, forming a socket that matches the spigot. An annular groove is provided circumferentially at the rear end of the tapered surface, and the sealing ring is installed in the annular groove. Multiple locking components are provided and detachably connected circumferentially to the tapered surface. This invention provides a sewage pipe that can prevent cracking and reduce displacement during pipe jacking.

The utility model discloses a kind of house construction pile foundation structures, specifically related to construction engineering technical field, the utility model is provided with annular hydraulic compensation sleeve, high-strength concrete core pile body, hydraulic control unit and miniature pressure sensor etc. parts, through the real-time data interaction between miniature pressure sensor and hydraulic control unit, and the collaborative control of the independent pressure partition of hydraulic control unit and annular hydraulic compensation sleeve, so that the hydraulic control unit can analyze historical settlement data through built-in algorithm, dynamically predict and accurately adjust the hydraulic oil pressure of each partition. Further, the device can adaptively adjust the stress distribution of the pile body caused by uneven settlement of the foundation through the multi-partition independent compensation mechanism, effectively reducing the cracking risk caused by settlement difference of the upper structure, and improving the overall stability of the building foundation.

The utility model relates to the technical field of building accessories, in particular to a high-strength concrete block which comprises a concrete block body, a plurality of longitudinal steel bars are fixedly mounted in the concrete block body, a plurality of steel fibers are fixedly mounted in the concrete block body, and three stirrups are fixedly mounted on the outer surfaces of the longitudinal steel bars. According to the improved concrete building block, a plurality of longitudinal steel bars are added, the tensile capacity of the building block is enhanced, then the longitudinal steel bars are hooped through stirrups, a regular steel bar grid framework is formed, it is guaranteed that the positions of the longitudinal steel bars are accurate when concrete is poured, displacement is avoided, formation and expansion of oblique cracks are prevented, and sudden brittle failure of components caused by shearing force is avoided; the surfaces of all the steel bars are provided with threads, and steel fibers are added into the concrete, so that the contact area of the steel bars and the concrete can be increased, stress distribution is more uniform, and generation and expansion of concrete cracks are delayed.

This utility model relates to the field of building industrialization technology and provides a prefabricated beam for prefabricated buildings, including: a main beam body, and further including: multiple hoisting embedded parts, which are set on the top or bottom surface of the main beam body, and the multiple hoisting embedded parts are evenly arranged in a straight line. This utility model uses a main beam body prefabricated from high-strength concrete or steel-concrete composite materials, with connecting steel bars pre-embedded in the connecting ends for anchoring with the on-site poured joint concrete. A steel sleeve is pre-embedded inside the connecting ends, its outer diameter matching the pre-reserved connecting parts at the column end, enabling rapid insertion and positioning. Simultaneously, a pouring hole is provided on the surface of the connecting ends; after installation, high-strength non-shrink grout is injected through the pouring hole, making the steel bars and sleeve form an integral force-bearing structure. The steel sleeve plus the grouting sleeve, combined with the shear keyway on the surface, forms a composite connection, significantly improving the joint strength and ductility, and is simple to operate.

This invention discloses an environmentally friendly non-metallic silicon-based material and its preparation method. By weight, the material comprises 80-92 parts of aluminosilicate solid waste raw material, 5-10 parts of nano-sized magnesium aluminum spinel, 1.5-3.8 parts of a composite rare earth polymorphic modifier, 0.4-1.2 parts of a surface energy gradient regulator, 0.6-1.8 parts of a vapor deposition epitaxial precursor, and 0.2-0.5 parts of a kinetic auxiliary stabilizer. This invention induces rare earth ions to enter the crystal lattice through a high-temperature melting infiltration process, thereby strengthening the thermal stress framework; utilizes supersonic mechanical chemical activation technology to construct an amorphous high-energy active defect layer of 150-350 nm on the powder surface; and employs plasma-enhanced vapor deposition epitaxy to grow a composite heterogeneous shell of 40-100 nm, ultimately achieving energy gradient balance through molecular grafting. This material possesses high density, strong hydrophobicity, and self-leveling properties, effectively solving the technical challenges of low activity, easy moisture absorption, and poor thermal stability in solid waste. It is widely applicable to environmentally friendly fireworks, ultra-high strength concrete, and metallurgical refractory materials.

This utility model provides a prefabricated high-strength concrete tower tube segment, comprising: an mounting plate, a limiting device, a connecting ring, a connecting frame, a fixing device, and a connecting device. The limiting device is disposed inside the mounting plate, the connecting ring is fixedly installed on one side of the limiting device, the connecting frame is disposed on one side of the connecting ring, and the fixing device is disposed inside the connecting ring. The connecting device includes multiple mounting slots, multiple connecting slots, and multiple connecting blocks, with the multiple mounting slots all being formed inside the connecting ring. This utility model provides a prefabricated high-strength concrete tower tube segment that limits the connection between the limiting device and the concrete tower through the connecting ring and connecting frame, thereby increasing the connection and limiting effect between the mounting plate and the concrete tower. Simultaneously, the connecting device connects the upper and lower connecting rings, thereby increasing the connection effect after the limiting device is installed and enhancing the overall integrity.

This invention discloses a composite bridge pier suitable for high-altitude and cold regions, comprising an inner core and an outer ring. The outer ring encloses the inner core and is made of ultra-high-strength concrete. The inner core is cast on-site from ordinary concrete, while the outer ring is prefabricated in a factory. This composite bridge pier uses only the more expensive ultra-high-strength concrete in the outer ring, which meets the requirements for freeze-thaw resistance while reducing the amount of ultra-high-strength concrete used, thus balancing project costs. Furthermore, the prefabricated outer ring can be directly used as a formwork for the bridge pier on-site, eliminating the material costs and installation / disassembly costs associated with traditional formwork construction.

This invention discloses a method for surface modification of ceramic powder and its application in ultra-high strength concrete, belonging to the field of building materials technology. The modification method uses nano-calcium carbonate, HPMC, and KH550 as composite modifiers, and through dry mechanical activation by a turbine propeller, forms a modified ceramic powder with a "filling-dispersion-bonding" coating layer. The modified ceramic powder achieves a 28-day pozzolanic activity index of 85%–95%. Replacing 10%–20% of cement with this modified ceramic powder, and combining it with an aggregate system of quartz sand and ceramic waste, UHPC is prepared. After steam curing at 60–70℃, the 28-day compressive strength is ≥170MPa, the 60-day strength reaches 190MPa, and the chloride ion penetration resistance coefficient is ≤5×10⁻⁶. ‑13 m 2 The process can dispose of 150-200 kg of ceramic waste per cubic meter per second. This invention features a simple process that achieves synergy between high-value utilization of construction solid waste and large-scale UHPC (Ultra-High-Performance Computing), making it suitable for applications in bridges, high-rise buildings, and other fields.

A high-capacity sugar extraction method for beet sugar factories includes the following steps: cutting off the top of a tower-type extractor; adding a cylindrical body to the top of the tower-type extractor; integrating and welding the extended cylindrical body and shaft; welding and mounting propeller blades on the extended shaft inside the tower body; and then installing the removed top of the tower body onto the top of the extended cylindrical body; installing a counterweight sleeve on the tower-type extractor support; filling the sleeve with high-strength concrete; and welding the contact points between the tower-type extractor and the cylindrical body; adding a drive device to the existing drive assembly; pre-treated blanched beet shreds entering the tower-type extractor from the bottom and slowly moving upwards within the extractor; hot water flowing downwards from the top of the extractor, counter-currently contacting the beet shreds to extract sugar; waste residue after sugar extraction being discharged from the top of the extractor; and the extracted sugar juice being discharged through a grate at the bottom of the extractor. This invention significantly improves the daily beet processing capacity and increases yield.

The application relates to the technical field of concrete permeability testing, and discloses a permeability testing device for high-strength concrete research and development, which comprises an equipment table, a plurality of rotary air cylinders and a plurality of telescopic air cylinders installed on the equipment table, a plurality of side wall sealing mechanisms fixedly installed in the equipment table, an adjustable upper cover assembly arranged above the side wall sealing mechanisms, and an adjustable lower seat assembly arranged below the side wall sealing mechanisms; the self-adapting lateral sealing mechanism is composed of a fixed cylinder, a shrinkable film, a spiral liquid guide plate and a petal isolation plate; during testing, a hydraulic system injects pressure oil into a liquid oil cavity through a liquid inlet pipe; the oil is uniformly and circumferentially diffused under the guidance of the spiral liquid guide plate, fills the whole cavity from the bottom to the top along the liquid passage of the fixed isolation plate, and is uniformly radially expanded inwards under the oil pressure; the petal isolation plate fixed on the film follows the movement, effectively restricts the deformation path of the film, and prevents local distortion.