Assembled round bamboo hole bamboo reinforced concrete component

Abstract

The utility model discloses an assembly type round bamboo hole bamboo reinforcement concrete component, including concrete component body, is equipped with one or more in bamboo reinforcement, bamboo tube, bamboo reinforcement mesh in component body, wherein, bamboo reinforcement includes a plurality of parallel arrangement and bamboo strip of bundle, bamboo reinforcement mesh is the net structure that a plurality of bamboo reinforcement crisscross forms, all components in the utility model adopt bamboo reinforcement, bamboo fiber concrete, hollow round bamboo and carry out combination configuration, so each component is by bamboo reinforcement, fiber concrete, hollow round bamboo etc. Commonly participate in the stress, under the superposition of bamboo reinforcement, fiber concrete, hollow round bamboo material, satisfy the requirement of compression resistance, bending resistance, shear resistance etc. in concrete structure design specification simultaneously, and the weight is smaller, the cost is lower, and the durability and environmental protection effect are better.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and in particular to a prefabricated round bamboo perforated bamboo reinforced concrete component. Background Technology

[0002] Most current building components are made of reinforced concrete, such as beams, columns, wall panels, and floor slabs. However, existing reinforced concrete structural components have the following disadvantages: 1) The large weight increases construction and transportation costs; 2) Traditional cast-in-place concrete structures have a long construction period, as the concrete needs a certain amount of time to reach the corresponding design strength. The construction process is relatively slow, which may lead to project delays and increased construction costs. 3) The durability is relatively poor. If the reinforced concrete structure is damaged (the concrete layer is destroyed and the steel bars are exposed) and repairs are not timely, the steel bars are very easy to rust and corrode, which seriously affects the structural safety. Moreover, the operation is more complicated and time-consuming. 4) Steel bar production causes some environmental pollution and is relatively expensive. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a prefabricated round bamboo perforated bamboo reinforced concrete component, so as to solve the problems of large weight, poor durability, low construction efficiency, high cost and serious environmental pollution of existing building components.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A prefabricated round bamboo perforated bamboo-reinforced concrete component includes a concrete component body, in which one or more of bamboo reinforcement, bamboo tubes, and bamboo mesh are provided. The bamboo strips consist of multiple parallel bamboo strips bundled together, and the bamboo strip mesh is a mesh structure formed by the crisscrossing of the bamboo strips.

[0005] As an optimization, the bamboo strips are rod-shaped structures with a rectangular cross-section, and multiple bamboo strips are bundled together by binding with steel wire or by bonding with adhesive.

[0006] As an optimization, multiple annular grooves or annular protrusions are distributed around the length of the bamboo strip.

[0007] As an optimization, the outer surface of the bamboo fiber is coated with a melamine-formaldehyde copolymer structural layer, asphalt paint, or an epoxy resin layer containing corundum.

[0008] As an optimization, the bamboo tube is made of natural round bamboo or round bamboo after the septum inside the bamboo node has been removed, and multiple anchor nails are distributed along the length of the bamboo tube. The anchor nails include multiple steel nails arranged in a cross pattern. The steel nails penetrate the bamboo tube radially, and both ends of the steel nails are higher than the side wall of the bamboo tube.

[0009] As an optimization, the component body is made of concrete mixed with bamboo fiber.

[0010] As an optimization, the main body of the component is a beam / column component, and a bamboo reinforcement cage is provided in the beam / column component along its length direction. The bamboo reinforcement cage includes multiple bamboo reinforcements extending along the length direction of the beam / column component, and each bamboo reinforcement is connected by hoops. Multiple bamboo tubes are also provided in the beam / column component along its length direction, and the bamboo tubes are located inside the enclosed area of ​​the bamboo reinforcement cage.

[0011] As an optimization, the component body is a wall panel component, the wall panel component is provided with bamboo mesh on both sides along its thickness direction, and multiple bamboo tubes extending along the height direction of the wall panel component are arranged at intervals along its width direction, the bamboo tubes being located between two bamboo mesh sheets.

[0012] As an optimization, bamboo reinforcement cages are also arranged in parallel between adjacent bamboo tubes. The bamboo reinforcement cage is a rectangular frame structure formed by binding four bamboo reinforcements together with hoops.

[0013] As an optimization, the main body of the component is a floor slab component, and the floor slab component is provided with bamboo mesh on both sides along its thickness direction, and multiple parallel bamboo tubes are set in the floor slab component, with the bamboo tubes located between two bamboo mesh sheets.

[0014] Compared with the prior art, this application has the following advantages: This utility model, 1. Using bamboo reinforcement instead of steel reinforcement and setting perforated round bamboo in concrete components can reduce weight to a certain extent, which means it has advantages such as light weight, weight reduction and cost saving. For example, in this patent, the bamboo reinforcement wall uses a double-layer bamboo reinforcement mesh, and the bamboo reinforcement uses a rectangular cross section tied into a circular cross section. The hollow bamboo tube between the double-layer bamboo reinforcement mesh can further reduce weight. 2. Using bamboo reinforcement can reduce the amount of steel reinforcement used, reduce carbon emissions, and achieve a green and environmentally friendly effect; 3. Adding bamboo fiber to concrete can make the concrete denser and reduce the intrusion of some harmful substances, so its durability is relatively better. 4. This is the first time that bamboo materials have been combined together, which can effectively utilize their advantages and achieve excellent physical and mechanical properties. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bamboo reinforcement structure in this utility model; Figure 2 This is a schematic diagram showing the arrangement of the bamboo reinforcement cage and bamboo tube in the beam component of this utility model; Figure 3 This is a structural schematic diagram of the central column component of this utility model; Figure 4 This is a structural schematic diagram of the wall panel component in this utility model; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a structural schematic diagram of the floor slab component in this utility model; In the picture, 1 is bamboo strip, 2 is bamboo tube, 3 is bamboo mesh, 4 is bamboo strip, 5 is steel nail, and 6 is stirrup. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] For specific implementation: see [link / reference] Figure 1-6 , A prefabricated bamboo-reinforced concrete component with hollow bamboo cores includes a concrete component body, which can be a building component such as a beam, column, wall panel, or floor slab. The component body contains one or more of the following: bamboo reinforcement 1, bamboo tubes 2, and bamboo mesh 3. This utility model of bamboo-reinforced (bamboo fiber) concrete components mainly includes several types such as bamboo-reinforced (bamboo fiber) concrete beams, columns, walls, and slabs. All components are configured using a combination of bamboo reinforcement 1, bamboo fiber concrete, and hollow bamboo cores. Therefore, each component is supported by the combined force of bamboo reinforcement 1, fiber concrete, and hollow bamboo cores. Under the superimposed action of these materials, the compressive, bending, and shear resistance requirements of the concrete structure design code are simultaneously met.

[0018] The bamboo reinforcement 1 comprises multiple parallel and bundled bamboo strips 4, and the bamboo reinforcement mesh 3 is a mesh structure formed by the crisscrossing of multiple bamboo reinforcements 1. Each bamboo strip 4 is a rod-shaped structure with a rectangular cross-section, and multiple strips 4 are bundled together by binding with steel wire or by adhesive. Multiple annular grooves or annular protrusions are distributed around the length of each bamboo reinforcement 1. The outer surface of the bamboo reinforcement 1 is coated with a melamine-formaldehyde copolymer structural layer, asphalt paint, or an epoxy resin layer containing corundum.

[0019] Specifically, commonly used bamboo preservation methods include carbonization, asphalt boiling, application of asphalt paint, ACQ (wood preservative), and boron preservative treatment. In this embodiment, bamboo ribs 1 can be treated by applying asphalt paint. After the bamboo ribs 1 are harvested and processed, they are left to air dry naturally for a period of time, and then asphalt paint is applied to them as a preservative material. Asphalt paint as a preservative material for bamboo ribs 1 has three significant advantages: good preservative effect, low cost, and strong engineering applicability.

[0020] Experimental studies have shown that after anti-corrosion treatment, bamboo strip 4, even after 15 days of immersion in strong acid and alkali indoors, retains its original appearance and tensile strength remains 93%–95% of its original strength, demonstrating strong corrosion resistance. Therefore, it offers good anti-corrosion performance at a relatively low cost and is easy to apply. The anti-corrosion treatment procedure for bamboo strip 4 is as follows: 1) Process newly felled bamboo that meets technical requirements into round bamboo poles, horizontal crossbars, and bamboo strips 4, to meet technical requirements.

[0021] 2) Place the bamboo strips 4 in a cool, ventilated, and rain-protected storage area for a certain period of time to allow them to air dry naturally until they reach the equilibrium moisture content or standard moisture content. Generally, 10% to 12% is used as the standard moisture content.

[0022] 3) Under the above conditions, manually apply asphalt paint to the surface of bamboo strip 4, including the green side of bamboo strip 4, to form an asphalt paint coating and seal; finally, let it air dry for later use. It is particularly important to note that the green side of bamboo strip 4 is not easy to apply asphalt paint to because its surface is dense and smooth, so the green side of bamboo strip 4 needs to be coated twice.

[0023] 4) Immerse the treated bamboo strips 4 in epoxy resin (a mixture of bisphenol A and epichlorohydrin) for 30 minutes. Remove them and twist the soaked bamboo strips 4 into bamboo reinforcement 1 according to the required specifications. If the length of the bamboo strips 4 is insufficient and overlap is necessary, the overlaps (including the bamboo nodes) should be staggered. Apply the remaining resin evenly to the surface of the composite bamboo reinforcement (add more evenly if necessary, ensuring the thickness completely covers the surface without dripping). Place it in a cool, shaded place for 30 minutes. Then, evenly sprinkle 3-4mm diameter corundum (preferably the same material as the coarse aggregate in concrete) onto the surface and compact it. The density should be sufficient to completely cover the composite bamboo reinforcement in a single layer, enhancing the adhesion between the bamboo reinforcement 1 and the concrete. Simultaneously, tighten the bamboo strips 4 with steel hoops to form bamboo reinforcement 1.

[0024] The bamboo reinforcement 1 is composed of several bamboo strips 4, each with grooves. The addition of steel hoops and the grooves on the bamboo strips 4 are intended to roughen the surface of the bamboo reinforcement 1, increasing friction and facilitating better bonding with concrete. Applying epoxy resin around the bamboo reinforcement 1 and coating it with corundum of the same particle size as the concrete aggregate further increases the contact area with the concrete. Beyond simply creating grooves, similar to ribbed steel bars, a bamboo reinforcement rib structure (protruding from the surface of the bamboo reinforcement 1) can also be created, similarly coated with epoxy resin and corundum, to further increase the contact area.

[0025] The component body is constructed from concrete incorporating bamboo fiber. Specifically, the bamboo fiber is modified. Previous research has shown that melamine-formaldehyde copolymer can improve the anti-expansion (shrinkage) and moisture resistance of wood, increase mechanical strength, and impart good weather resistance, degradation resistance, and flame retardancy to wood. The main chemical components of the cell walls of natural plant fibers are cellulose, hemicellulose, lignin, and ash. The surface of bamboo fiber is rich in hydroxyl groups, and melamine-formaldehyde copolymer readily reacts with these hydroxyl functional groups. Through appropriate treatment, a high-molecular copolymer film can be formed on the surface of bamboo fiber. This film acts as a transition layer, achieving bonding between different phases. Asphalt sample test results (provided by the manufacturer) show: petroleum asphalt content 90wt%-92wt%, dimethyl dibenzothiophene 6wt%-7wt%, and dibutyl phthalate 0.1wt%-0.3wt%. The asphalt surface has few active chemical groups and is inert. Therefore, it is proposed to improve the interfacial compatibility between bamboo fiber and the bamboo matrix by modifying the surface of bamboo fiber to reduce its surface polarity.

[0026] The specific modification method for bamboo fiber is as follows: Melamine (15.12g) and formaldehyde (58.38g) were placed in a three-necked flask at a molar ratio of 1:6. After mixing, the mixture was magnetically stirred for 5 minutes. The pH of the solution was adjusted to 8.5 using NaOH (20wt%). Then, the three-necked flask was placed in a water bath (50℃), magnetically stirred, and heated in the water bath for 40 minutes. Finally, the dried bamboo fiber (dried in a 103℃ oven for 24 hours) was evenly spread onto aluminum foil. The prepared modifier was then evenly sprayed onto the surface of the bamboo fiber using a spray bottle. The fiber was then dried in a 103℃ oven for at least 20 hours, resulting in the modified bamboo fiber shown in the figure below. The modified bamboo fiber was stored in a sealed plastic bag for later use.

[0027] The bamboo tube 2 is made of natural round bamboo or round bamboo after the septum inside the bamboo node has been removed. Multiple anchor nails are distributed along the length of the bamboo tube 2. The anchor nails include multiple steel nails 5 arranged in a cross pattern. The steel nails 5 penetrate the bamboo tube 2 radially, and both ends of the steel nails are higher than the side wall of the bamboo tube 2 to enhance the bonding force with the concrete.

[0028] The main body of the component is a beam / column component. A bamboo reinforcement cage is provided along the length of the beam / column component. The bamboo reinforcement cage includes multiple bamboo reinforcements 1 extending along the length of the beam / column component, and each bamboo reinforcement 1 is connected by stirrups 6. Multiple bamboo tubes 2 are also provided along the length of the beam / column component, and the bamboo tubes 2 are located inside the enclosed area of ​​the bamboo reinforcement cage 1. Specifically, taking the beam component as an example, the longitudinal reinforcing steel is a rectangular bamboo reinforcement 1. The bamboo reinforcement 1 and bamboo fiber undergo special treatment. The specific treatment method for the bamboo reinforcement 1 is as follows: the cut bamboo material is mechanically made into rectangular strips 4, and the strips 4 are classified according to their location (bamboo green or bamboo yellow) and placed in a cool place to air dry naturally, maintaining a moisture content of about 20%. The proportion of the bamboo green portion of the selected strips 4 is 40%. The air-dried strips 4 are immersed in epoxy resin (a mixture of bisphenol A and epichlorohydrin) for 30 minutes, then removed. Twist the bamboo strips 4 into bamboo reinforcement 1 according to the required specifications. The schematic diagram of bamboo reinforcement 1 is shown below. If the length of the bamboo strips 4 is insufficient and overlap is required, the overlap (including the bamboo nodes) should be staggered. Apply the remaining resin evenly to the surface of the composite bamboo reinforcement (if the remaining resin is insufficient, apply more evenly, the thickness should be enough to completely cover the surface of the composite bamboo reinforcement without dripping). Place it in a cool place for 30 minutes, then evenly sprinkle 3-4mm diameter corundum (the corundum material is best the same as the coarse aggregate of the concrete) on its surface and press it down. The density of sprinkling should be enough to completely cover the composite bamboo reinforcement in a single layer to enhance the bonding strength between bamboo reinforcement 1 and concrete. At the same time, tighten the bamboo strips 4 with steel wire to form bamboo reinforcement 1. The bamboo fiber is processed by machine into fibers with a diameter of 1mm and a length of 20mm. Other diameters and lengths can also be made into fibers. The bamboo fiber is dried and modified with chemical reagents, and waterproofed. The fiber volume content is 2%.

[0029] The stirrups 6 of the bamboo fiber beam are made of steel bars with a diameter of 8@100. The longitudinal reinforcing bars are replaced by bamboo bars 1. Holes are drawn in the bamboo fiber rectangular beam. Bamboo tubes 2 are used at the hole locations. All bamboo nodes inside the bamboo tubes 2 are removed. A row of cross-shaped steel nails 5 are inserted into the bamboo tubes 2 for better contact with the concrete surface and coordinated stress distribution, resulting in better overall stress performance.

[0030] The component body is a wall panel component. The wall panel component has bamboo mesh 3 on both sides along its thickness direction, and multiple bamboo tubes 2 extending along the height direction of the wall panel component are arranged at intervals along its width direction. The bamboo tubes 2 are located between two bamboo mesh 3. A bamboo cage is also arranged parallel between adjacent bamboo tubes 2. The bamboo cage is a rectangular frame structure formed by four bamboo bars 1 bound together by stirrups 6.

[0031] The main body of the component is a floor slab component. The floor slab component is provided with bamboo mesh 3 on both sides along its thickness direction, and multiple parallel bamboo tubes 2 are set in the floor slab component. The bamboo tubes 2 are located between two bamboo mesh 3.

[0032] In summary, currently used components are bamboo-reinforced concrete components, which simply replace bamboo reinforcement with steel reinforcement. However, because bamboo is sensitive to water, water absorption and expansion cause concrete cracking, and water loss causes the bamboo reinforcement to crack and break, resulting in a decrease in the durability of bamboo-reinforced concrete. The bamboo reinforcement in this utility model uses modified bamboo reinforcement, which is pre-formed into square strips and then dried, and coated with diamond abrasive to increase the friction of the bamboo reinforcement.

[0033] The most widely used fiber-reinforced concrete components are steel fiber reinforced concrete, but steel fibers are expensive. Replacing them with modified bamboo fibers can reduce costs to some extent.

[0034] Traditional reinforced concrete structures have a large self-weight. Using hollow bamboo with holes can greatly reduce the self-weight; at the same time, replacing steel bars with bamboo ribs further reduces the self-weight.

[0035] The application of bamboo in concrete components on the market is limited to bamboo reinforcement or bamboo fiber. This patent combines bamboo reinforcement, bamboo fiber, and hollow bamboo in concrete components, which not only reduces weight and lowers costs, but also better protects the internal bamboo reinforcement due to the addition of fiber. The three work together to form a composite bamboo material component.

[0036] Using processed round bamboo not only reduces its weight and cost, but also provides excellent load-bearing capacity due to the bamboo's inherent resistance to compression and bending. Note that retaining the bamboo nodes in round bamboo is for better load-bearing.

[0037] Therefore, this utility model, 1. Using bamboo reinforcement instead of steel reinforcement and setting perforated round bamboo in concrete components can reduce weight to a certain extent, which means it has advantages such as light weight, weight reduction and cost saving. For example, in this patent, the bamboo reinforcement wall uses a double-layer bamboo reinforcement mesh, and the bamboo reinforcement uses a rectangular cross section tied into a circular cross section. The hollow bamboo tube between the double-layer bamboo reinforcement mesh can further reduce weight. 2. Using bamboo reinforcement can reduce the amount of steel reinforcement used, reduce carbon emissions, and achieve a green and environmentally friendly effect; 3. Adding bamboo fiber to concrete can make the concrete denser and reduce the intrusion of some harmful substances, so its durability is relatively better. 4. This is the first time that bamboo materials have been combined together, which can effectively utilize their advantages and achieve excellent physical and mechanical properties.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A prefabricated round bamboo perforated concrete component, characterized in that, Includes a concrete component body, which is a wall panel component or a floor slab component; When the component body is a wall panel component, the wall panel component is provided with bamboo mesh on both sides along its thickness direction, and multiple bamboo tubes extending along the height direction of the wall panel component are spaced apart along its width direction in the wall panel component, and the bamboo tubes are located between two bamboo mesh. When the main body of the component is a floor slab, the floor slab is provided with bamboo mesh on both sides along its thickness direction, and multiple parallel bamboo tubes are set in the floor slab, with the bamboo tubes located between two bamboo mesh sheets. The bamboo mesh is a mesh structure formed by multiple bamboo strips interlacing vertically and horizontally, and the bamboo strips include multiple parallel bamboo strips bundled together.

2. The prefabricated round bamboo perforated concrete component according to claim 1, characterized in that, The bamboo strips are rod-shaped structures with a rectangular cross-section, and multiple bamboo strips are bundled together by binding with steel wire or by bonding with adhesive.

3. The prefabricated round bamboo perforated concrete component according to claim 1, characterized in that, Multiple annular grooves or annular protrusions are distributed along the length of the bamboo strip.

4. A prefabricated round bamboo perforated concrete component according to claim 1, characterized in that, The outer surface of the bamboo fiber is coated with a melamine-formaldehyde copolymer structural layer, asphalt paint, or an epoxy resin layer containing corundum.

5. A prefabricated round bamboo perforated concrete component according to claim 1, characterized in that, The bamboo tube is made of natural round bamboo or round bamboo after the septum inside the bamboo node has been removed, and multiple anchor nails are distributed along the length of the bamboo tube. The anchor nails include multiple steel nails arranged in a cross pattern. The steel nails penetrate the bamboo tube radially, and both ends of the steel nails are higher than the side wall of the bamboo tube.

6. A prefabricated round bamboo perforated concrete component according to claim 1, characterized in that, Bamboo reinforcement cages are also arranged parallel to each other between adjacent bamboo tubes. The bamboo reinforcement cage is a rectangular frame structure formed by binding four bamboo reinforcements together with hoops.

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