High-strength gypsum lath with pressure and bending resistance

Abstract

The application relates to the technical field of structural members, and particularly discloses a high-strength gypsum batten with pressure resistance and folding resistance, which comprises a batten main body and a plurality of folding resistance assemblies equidistantly distributed along the width direction inside the batten main body, the folding resistance assemblies are arranged between adjacent holes, a single folding resistance assembly comprises first and second buffer plates which are parallel to each other, first and second V-shaped frames which are alternately and oppositely arranged between the first and second buffer plates, and a first buffer column which is connected to the inner sides of the first and second V-shaped frames through arc fixing claws, and the outer side of the second V-shaped frame is connected to a second buffer column through an arc fixing claw, and the outer side of the first V-shaped frame is connected to a third buffer column through an arc fixing claw; the batten main body is composed of gypsum, hemihydrate gypsum, asbestos cement, composite fibers, modified hardening fillers and the like, the folding resistance assembly effectively improves the folding resistance of the gypsum batten, and the batten main body raw material formula also improves the pressure resistance and folding resistance of the gypsum batten.

Description

Technical Field

[0001] This invention relates to the field of structural component technology, specifically to a high-strength gypsum board that is resistant to pressure and bending. Background Technology

[0002] In the construction industry, traditional gypsum board has been widely used due to its low cost and convenient construction. In residential partition systems, traditional gypsum board can be quickly assembled into partitions to meet the needs of interior space division. In commercial building zoning scenarios, it can flexibly separate different functional areas to adapt to diverse commercial operation needs. Traditional gypsum board also plays a role in non-load-bearing partitions in industrial plants, enabling rational planning of the interior space. Traditional gypsum board typically uses a mortise and tenon structure with protruding strips and grooves to achieve horizontal or vertical assembly. This assembly method is simple and easy to implement, helping to improve construction efficiency. At the same time, the through-holes inside the board optimize sound and heat insulation performance to a certain extent and reduce the weight of the board itself, meeting the requirements of lightweight construction. However, traditional gypsum board has a significant drawback: due to the brittleness of gypsum material itself, its compressive and flexural strength is poor. Under external forces, it is prone to cracking or even breakage, which not only affects the overall stability and safety of the building structure but also increases later maintenance costs.

[0003] Based on the above, in the prior art, patent number CN202110595611.5 discloses a high-strength compressive gypsum board and its preparation method. This gypsum board mainly consists of a base layer, reinforcing strips, an adhesive layer, a waterproof layer, and a buffer layer. The base layer is made of gypsum material, with multiple reinforcing strips made of glass fiber material evenly distributed within it to improve the compressive and flexural strength of the gypsum board. An adhesive layer made of white latex material is provided on the outside of the base layer, mainly used to firmly bond the base layer and the waterproof layer together, ensuring the integrity and stability of each layer. The waterproof layer is made of PP material, which can effectively prevent moisture from penetrating into the interior of the gypsum board, avoiding performance degradation due to moisture erosion. The outermost buffer layer is made of EVA sponge material, which can buffer external impacts to a certain extent, reducing damage to the main body of the gypsum board.

[0004] Although the aforementioned gypsum board, through this multi-layer structural design, improves compressive strength to some extent, it still suffers from insufficient compressive and flexural strength when faced with large and continuous pressure loads. Specifically, under continuous pressure, the fiberglass reinforcing strips are prone to delamination from the base layer, preventing them from fully exerting their reinforcing effect. Furthermore, while the multi-layer composite structure optimizes functional protection, it does not solve the problem of ineffective stress transfer caused by the differences in the properties of the materials in each layer. Summary of the Invention

[0005] To address the technical deficiencies in the background art, this invention proposes a high-strength gypsum board that is resistant to pressure and bending. To further solve the aforementioned technical problems and meet practical needs, the specific technical solution is as follows:

[0006] A high-strength gypsum board with pressure and flexural strength includes a board body and several sets of flexural strength components disposed within the board body. The flexural strength components are equidistantly distributed within the board body along the width direction. Each set of flexural strength components includes a first buffer plate and a second buffer plate arranged parallel to each other vertically, several first V-shaped frames and second V-shaped frames disposed between the first and second buffer plates, and several arc-shaped fixing claws. The first V-shaped frames and second V-shaped frames are alternately arranged between the first and second buffer plates. Adjacent first V-shaped frames and second V-shaped frames are oriented opposite each other and arranged in opposite directions. A common first buffer column is provided on the inner side of the first V-shaped frames and second V-shaped frames. The first buffer column is connected to the inner apex corner of the first V-shaped frames and second V-shaped frames respectively through the arc-shaped fixing claws. The fixing arc surface of the arc-shaped fixing claw is connected to the first buffer column.

[0007] As a further technical solution of the present invention, the second buffer column is symmetrically arranged above the outer side of the second V-shaped frame, and the second buffer column is connected to the first buffer plate and the corresponding side surface of the second V-shaped frame below it through the arc-shaped fixing claw.

[0008] As a further technical solution of the present invention, a third buffer column is symmetrically arranged below the outer side of the first V-shaped frame, and the third buffer column is connected to the second buffer plate and the corresponding side surface of the first V-shaped frame above it through arc-shaped fixing claws.

[0009] As a further technical solution of the present invention, tenons and mortises that cooperate with the tenons are respectively provided on the left and right sides of the main body of the strip. The interior of the main body of the strip is provided with a plurality of holes that are arranged through the length of the main body of the strip and are evenly distributed. The anti-bending component is arranged between adjacent holes.

[0010] As a further technical solution of the present invention, the main body of the strip is composed of the following raw materials by weight fraction: 80-90 parts of gypsum, 20-30 parts of hemihydrate gypsum, 20-40 parts of asbestos cement, 5-10 parts of composite fiber, 15-20 parts of modified hardening filler, 0.1-5 parts of water reducing agent, and 50-200 parts of water.

[0011] The composite fiber is composed of basalt fiber and elastic fiber coated on the surface of glass fiber, and the modified hardening filler is composed of hollow glass bead powder and a zirconium dioxide hardening layer coated on the surface of hollow glass bead powder.

[0012] As a further technical solution of the present invention, the basalt fiber has a length of 2-5cm and a diameter of 100-200μm, the glass fiber has a length of 0.1-0.2mm and a diameter of 10-20μm, the hollow glass bead powder has a particle size of 100-150μm, the sphere wall thickness of the hollow glass bead powder is 10-20μm, and the thickness of the zirconium dioxide hardening layer is 0.01-0.05μm.

[0013] As a further technical solution of the present invention, the water-reducing agent is selected from any one of polycarboxylate water-reducing agents, aminosulfonate-based high-efficiency water-reducing agents, and melamine-based water-reducing agents.

[0014] The beneficial effects of this invention are as follows:

[0015] The flexural strength component of this invention effectively improves the flexural strength of gypsum board through a structure consisting of a first buffer plate, a second buffer plate, alternating reverse-arranged first and second V-shaped frames, and buffer columns. The alternating reverse-arranged V-shaped frames and the supporting effect of the buffer columns disperse and buffer external forces, reducing the risk of gypsum board breakage under stress. The main body of the board is made of gypsum, hemihydrate gypsum, composite fibers, modified hardening fillers, asbestos cement, and other raw materials, which give the board basic strength. The composite fibers enhance the toughness of the main body of the board, the modified hardening fillers increase the hardness of the main body of the board, and the use of water-reducing agents improves the fluidity of the materials, making the internal structure of the main body of the board denser, thus comprehensively improving the compressive and flexural strength of the gypsum board. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the internal structure of the gypsum board of the present invention.

[0017] Figure 2 For along Figure 1 Cross-sectional view at point AA.

[0018] Figure 3 For along Figure 1 Cross-sectional view at point BB.

[0019] Reference numerals: 1-Strip body; 11-Tongue; 12-Mortise; 13-Hole; 2-Anti-bending component; 21-First buffer plate; 22-First V-shaped frame; 23-Second V-shaped frame; 24-First buffer post; 25-Curved fixing claw; 27-Second buffer post; 28-Third buffer post; 29-Second buffer plate. Detailed Implementation

[0020] like Figures 1 to 3As shown, the present invention provides a technical solution: a high-strength gypsum board with pressure and bending resistance, comprising a board body 1 and several sets of bending-resistant components 2 disposed within the board body 1. The bending-resistant components 2 are equidistantly distributed within the board body 1 along the width direction of the board body 1. Each set of bending-resistant components 2 includes a first buffer plate 21 and a second buffer plate 29 arranged parallel to each other, several first V-shaped frames 22 and second V-shaped frames 23 disposed between the first buffer plates 21 and the second buffer plates 29, and several arc-shaped fixing claws 25. The first V-shaped frames 22 and the second V-shaped frames 23 are alternately arranged between the first buffer plates 21 and the second buffer plates 29. Adjacent first V-shaped frames 22 and second V-shaped frames 23 are oriented oppositely and arranged in opposite directions. A common first buffer post 24 is disposed on the inner side of the first V-shaped frames 22 and the second V-shaped frames 23. The first buffer post 24 is connected to the inner apex corner of the first V-shaped frames 22 and the second V-shaped frames 23 respectively through the arc-shaped fixing claws 25. The fixing arc surface of the arc-shaped fixing claws 25 is connected to the first buffer post 24.

[0021] Furthermore, in the above scheme, the top corner of the first V-shaped frame 22 is connected to the second buffer plate 29, the two bottom ends of the first V-shaped frame 22 are connected to the first buffer plate 21, the top corner of the second V-shaped frame 23 is connected to the first buffer plate 21, and the two bottom ends of the second V-shaped frame 23 are connected to the second buffer plate 29, so that the adjacent first V-shaped frames 22 and second V-shaped frames 23 are arranged in opposite directions.

[0022] The anti-flexural components 2 are equidistantly distributed along the width of the main body 1 of the gypsum board. Each set of anti-flexural components 2 includes a first buffer plate 21 and a second buffer plate 29 arranged parallel to each other, several first V-shaped frames 22 and second V-shaped frames 23, and several arc-shaped fixing claws 25. The first V-shaped frames 22 and the second V-shaped frames 23 are alternately arranged between the first buffer plate 21 and the second buffer plate 29. Adjacent first V-shaped frames 22 and second V-shaped frames 23 face each other and are arranged in opposite directions. The first buffer column 24 is provided on the inner side of the first V-shaped frame 22 and the second V-shaped frame 23. The first buffer column 24 is connected to the inner apex corner of the first V-shaped frame 22 and the second V-shaped frame 23 respectively through the arc-shaped fixing claws 25, thereby forming a stable skeleton structure in the gypsum board.

[0023] Specifically, the first V-shaped frame 22 and the second V-shaped frame 23 are alternately and in opposite directions between the first buffer plate 21 and the second buffer plate 29. The apex of the first V-shaped frame 22 is connected to the second buffer plate 29, and its two bottom ends are connected to the first buffer plate 21; the apex of the second V-shaped frame 23 is connected to the first buffer plate 21, and its two bottom ends are connected to the second buffer plate 29. This connection method constructs a three-dimensional and stable skeleton structure, forming multiple mutually supporting mechanical units inside the gypsum board, effectively enhancing the overall compressive and flexural strength of the gypsum board.

[0024] The skeleton structure is formed by the alternating reverse arrangement of the first V-shaped frame 22 and the second V-shaped frame 23, and is firmly connected with the first buffer plate 21 and the second buffer plate 29, thus forming a highly stable mechanical system. When subjected to external forces, the components support each other and can effectively resist deformation. Even if the gypsum board is subjected to large pressure or bending force, the skeleton structure can maintain its shape and integrity and is not prone to twisting or breaking, thereby effectively improving the pressure and flexural strength of the gypsum board and extending its service life.

[0025] like Figures 1 to 3 As shown, in one of the preferred embodiments of the present invention, the second V-shaped frame 23 is symmetrically provided with second buffer posts 27 on its outer side above it. The second buffer posts 27 are connected to the first buffer plate 21 and one side surface of the corresponding second V-shaped frame 23 below it through arc-shaped fixing claws 25 respectively. The first V-shaped frame 22 is symmetrically provided with third buffer posts 28 on its outer side below it. The third buffer posts 28 are connected to the second buffer plate 29 and one side surface of the corresponding first V-shaped frame 22 above it through arc-shaped fixing claws 25 respectively.

[0026] Specifically, the first buffer post 24, the second buffer post 27, and the third buffer post 28 are made of highly elastic rubber or polyurethane elastomer with good elasticity and deformation recovery ability. The second buffer post 27 and the third buffer post 28 have the same elastic modulus, and the elastic modulus of the first buffer post 24 is 2-4 times that of the second buffer post 27 and the third buffer post 28.

[0027] In the above structure, the skeleton structure formed by assembling the first V-shaped frame 22, the second V-shaped frame 23, the first buffer plate 21 and the second buffer plate 29, together with the second buffer column 27 and the third buffer column 28, can realize the multi-path transmission and dispersion of pressure and effectively absorb pressure.

[0028] When pressure is applied to the first buffer plate 21, the first buffer plate 21 directly transmits the pressure to the top corner of the second V-frame 23 and the two bottom ends of the first V-frame 22, thereby dispersing the pressure throughout the entire frame structure. Part of the pressure is transmitted through the arc-shaped fixing claw 25 to the second buffer column 27 above the outer side of the second V-frame 23. The second buffer column 27 absorbs part of the pressure, reducing the pressure peak directly acting on the frame structure. The unabsorbed pressure is then transmitted through the arc-shaped fixing claw 25 to the two outer surfaces of the second V-frame 23, where it, together with the pressure directly acting on the top corner of the second V-frame 23, squeezes the first buffer column 24, further absorbing and dispersing the pressure. The pressure acting on the two bottom ends of the first V-frame 22 is transmitted through the first V-frame 22 and the arc-shaped fixing claw 25 to the two third buffer columns 28 below the first V-frame 22. The third buffer columns 28 absorb the pressure, reducing the pressure concentration at that location. This multi-path pressure transmission and absorption mechanism allows the pressure acting on the first buffer plate 21 to be fully dispersed, avoiding structural damage caused by excessive local pressure, thereby improving the pressure resistance and flexural strength of the gypsum board.

[0029] When pressure is applied to the second buffer plate 29, the pressure is transmitted to the top corner of the first V-frame 22 and the two bottom ends of the second V-frame 23, thus dispersing the pressure. Part of the pressure is transmitted through the arc-shaped fixing claw 25 to the third buffer column 28 below the outer side of the first V-frame 22. The third buffer column 28 absorbs the pressure, reducing the pressure on the frame structure. The third buffer column 28 transmits the unabsorbed pressure through the arc-shaped fixing claw 25 to the two outer surfaces of the first V-frame 22, where it, together with the pressure directly applied to the top corner of the first V-frame 22, squeezes the first buffer column 24, further absorbing the pressure. The pressure applied to the two bottom ends of the second V-frame 23 is transmitted through the second V-frame 23 and the arc-shaped fixing claw 25 to the two second buffer columns 27 above the second V-frame 23, where the second buffer columns 27 absorb the pressure. This multi-path pressure transmission and absorption method effectively disperses the pressure applied to the second buffer plate 29, enhancing the gypsum board's ability to withstand pressure and resist bending.

[0030] like Figure 2 and Figure 3 As shown, in one of the preferred embodiments of the present invention, tenons 11 and mortises 12 that cooperate with the tenons 11 are respectively provided on the left and right sides of the main body 1. The interior of the main body 1 is provided with a plurality of holes 13 that are arranged through the length of the main body 1 and are evenly distributed. The anti-bending component 2 is disposed between adjacent holes 13.

[0031] Tenons 11 and mortises 12 are respectively provided on the left and right sides of the main body 1 of the strip. During construction, workers only need to accurately insert the tenon 11 of one strip into the mortise 12 of another strip to quickly complete the connection between the strips, improving construction efficiency. The bending resistance component 2 is set between adjacent holes 13, which can make full use of the space of the main body 1 of the strip, so that the bending resistance component 2 forms a reasonable mechanical support system inside the strip. While the holes 13 reduce the weight of the strip, the bending resistance component 2 provides the strip with strong bending and compressive resistance through its special V-shaped frame and buffer column structure. The synergistic effect of the two makes the strip have higher strength and stability while maintaining lightweight.

[0032] As one of the preferred embodiments of the present invention, the main body 1 of the strip is composed of the following raw materials by weight fraction: 80-90 parts of gypsum, 20-30 parts of hemihydrate gypsum, 20-40 parts of asbestos cement, 5-10 parts of composite fiber, 15-20 parts of modified hardening filler, 0.1-5 parts of water reducing agent, and 50-200 parts of water.

[0033] The composite fiber is composed of basalt fiber and elastic fiber coated on the surface of the basalt fiber, and the modified hardening filler is composed of hollow glass bead powder and a zirconium dioxide hardening layer coated on the surface of the hollow glass bead powder.

[0034] Specifically, the main body 1 of the strip is composed of the following raw materials in parts by weight: 80 parts gypsum, 30 parts hemihydrate gypsum, 20 parts asbestos cement, 10 parts composite fiber, 20 parts modified hardening filler, 1 part water-reducing agent, and 100 parts water.

[0035] In the raw materials of the above-mentioned main body 1 of the strip, the modified hardening filler is composed of hollow glass bead powder and a zirconium dioxide hardening layer coated on the surface of the hollow glass bead powder. The hollow glass bead powder itself has certain strength and lightweight characteristics, and its hollow structure can absorb and disperse external pressure to a certain extent. The zirconium dioxide hardening layer coated on its surface has high hardness and high strength, which can effectively improve the surface hardness and overall strength of the hollow glass bead powder. When the main body 1 of the strip is subjected to pressure, the modified hardening filler plays a role similar to a "hard skeleton" in the gypsum matrix, which can withstand and disperse part of the pressure, prevent the gypsum matrix from undergoing excessive deformation or damage under pressure, thereby increasing the compressive and flexural strength of the main body 1 of the strip, and further helping to increase the overall compressive and flexural strength of the gypsum strip.

[0036] In the raw materials of the above-mentioned main body 1 of the strip, the composite fiber is composed of basalt fiber and elastic fiber coated on the surface of the basalt fiber. The basalt fiber has excellent properties such as high strength, high modulus, high temperature resistance, and corrosion resistance. In the main body 1 of the strip, it can play a role in strengthening and toughening. When the strip is subjected to external force, the basalt fiber can withstand tensile stress, limit the expansion of cracks in the gypsum matrix, and prevent the gypsum strip from breaking due to the rapid development of cracks. The elastic fiber coated on the surface of the basalt fiber has good flexibility and elasticity, which can buffer and absorb external force to a certain extent. This allows the composite fiber to deform to a certain extent when subjected to external force without being destroyed, avoiding stress concentration that leads to brittle fracture. At the same time, it evenly transmits the external force to the surrounding gypsum matrix, so that the composite fiber can effectively improve the tensile strength and toughness of the main body 1 of the strip. This allows the gypsum strip to better resist deformation and damage when subjected to pressure and bending force, thereby helping to increase the overall compressive and flexural strength of the gypsum strip.

[0037] In one preferred embodiment of the present invention, the basalt fiber has a length of 2-5 cm and a diameter of 100-200 μm, the elastic fiber has a length of 0.1-0.2 mm and a diameter of 10-20 μm, the hollow glass bead powder has a particle size of 100-150 μm and a spherical wall thickness of 10-20 μm, and the zirconium dioxide hardening layer has a thickness of 0.01-0.05 μm.

[0038] Specifically, the elastic fiber is made of natural rubber fiber polymerized from cis-1,4-polyisoprene, with an elastic modulus of 1.72 MPa and a tensile strength of 22.8 MPa.

[0039] Composite fibers can be prepared using the following methods:

[0040] Vinyltriethoxysilane was dissolved in an aqueous ethanol solution (water:ethanol mass ratio of 1:3) (concentration of vinyltriethoxysilane was 8wt%) to obtain a coupling agent solution. Natural rubber fibers (length 0.2 mm, diameter 20 μm) and basalt fibers (length 5 cm, diameter 150 μm) were respectively immersed in the coupling agent solution for 4 h, with the ratio of natural rubber fiber / basalt fiber:coupling agent solution = 1:10 (mass ratio). After drying, they were placed in an oven at 100℃ to obtain modified natural rubber fibers and modified basalt fibers.

[0041] Modified natural rubber fiber and modified basalt fiber were added to an appropriate amount of tetrahydrofuran at a ratio of 1:20 (mass ratio), and then benzoin dimethyl ether was added. The mixture was stirred and mixed well, with the mass ratio of natural rubber fiber to benzoin dimethyl ether being 100:1. The mixture was irradiated under a UV lamp and stirred for 30-60 min. After filtration and separation, the mixture was washed with deionized water to obtain composite fiber.

[0042] In the above-mentioned method for preparing composite fibers, the vinyl groups on the surface of the modified natural rubber fiber and the carbon-carbon double bonds in its own skeleton structure undergo an addition reaction with the vinyl groups on the surface of the modified basalt fiber under the initiation of benzoin dimethyl ether, thereby allowing the modified natural rubber fiber to coat the surface of the modified basalt fiber and obtaining composite fibers.

[0043] Modified hardening fillers can be prepared using the following methods:

[0044] Add 10.0 g of hollow glass beads (particle size 150 μm, sphere wall thickness 20 μm) to 150 mL of deionized water and disperse by ultrasonication. Then add 1.5 g of ZrOCl2·8H2O and mix well. Then slowly add 5 mL of 13% ammonia water while stirring. Then add 0.20 g of propyltriethoxysilane and continue to mix well to obtain a suspension.

[0045] The suspension was placed in a high-pressure reactor for hydrothermal reaction. The synthesis temperature was increased at a rate of 3℃ / min. After heating to 210℃, the temperature was maintained for 1.5 hours. Then, the mixture was filtered to separate the zirconium-loaded hollow glass beads. The powder was washed with deionized water until no Cl was detected. - The intermediate was obtained by drying at 100℃ for 12 hours.

[0046] Propyltriethoxysilane was dissolved in an aqueous ethanol solution (water:ethanol mass ratio of 1:10) (the concentration of propyltriethoxysilane was 5wt%) to obtain a coupling agent solution. The intermediate was immersed in the coupling agent solution for 4 hours. The ratio of intermediate to coupling agent solution was 1:10 (mass ratio). Then, after air drying, it was placed in an oven at 100℃ to dry and obtain the modified hardening filler.

[0047] The modified hardening filler prepared by the above method can be used to obtain a modified hardening filler with a zirconia hardening layer with a thickness of 0.05 μm, and the modified hardening filler has good dispersibility in the main slurry of the strip.

[0048] In the above-mentioned modified hardening filler method, zirconium oxychloride and ammonia water undergo a hydrothermal reaction in a high-pressure reactor to generate zirconium dioxide microspheres with an average particle size of 5-10 nm. Then, propyltriethoxysilane is hydrolyzed in the reaction system. The three ethoxy groups in propyltriethoxysilane react with water molecules to generate silanol groups (-SiOH) and C3H7Si(OH)3. On the one hand, the silanol groups of C3H7Si(OH)3 react with the surface hydroxyl groups of hollow glass beads and the surface hydroxyl groups of zirconium dioxide microspheres, respectively, thereby loading the zirconium dioxide microspheres onto the surface of hollow glass beads to form a zirconium dioxide hardening layer. On the other hand, the silanol groups on the surface of the zirconium dioxide microspheres not loaded on the surface of hollow glass beads are grafted with -SiC3H7 groups after the reaction of C3H7Si(OH)3, resulting in a dispersive effect between the zirconium dioxide microspheres not loaded on the surface of hollow glass beads, thereby avoiding the aggregation of zirconium dioxide microspheres.

[0049] As one of the preferred embodiments of the present invention, the water-reducing agent is selected from any one of polycarboxylate water-reducing agents, aminosulfonate-based high-efficiency water-reducing agents, and melamine-based water-reducing agents.

[0050] The preferred water-reducing agent is a polycarboxylate superplasticizer. Polycarboxylate superplasticizers improve the fluidity and workability of gypsum slurry, reduce water consumption, and increase the density and strength of gypsum slabs. Polycarboxylate superplasticizers can adsorb onto the surface of gypsum particles, forming a lubricating film that reduces friction and resistance between particles, making the gypsum slurry flow more smoothly during mixing and pouring. Simultaneously, the water-reducing agent also reduces water consumption and increases the density and strength of the material.

[0051] The technical solution for preparing gypsum board examples will be explained below.

[0052] A method for preparing high-strength gypsum board that is resistant to pressure and flexural stress includes the following steps:

[0053] S1, Assemble the skeleton structure

[0054] Preparation of the first buffer plate 21 and the second buffer plate 29: A rubber sheet with a thickness of 1 cm and a width of 8 cm is used, cut to match the designed length of the plasterboard strips. The spacing between adjacent buffer plates is set to 1.5 cm, and the spacing between the upper and lower buffer plates is 40 cm.

[0055] Making the V-shaped frame: Select a stainless steel plate that is 0.4cm thick and 1cm wide, and bend it into a V-shaped structure at a 45° angle. The top corner of the first V-shaped frame 22 is fixed to the second buffer plate 29 with hot melt glue, and the two bottom ends are placed in the reserved groove of the first buffer plate 21. The top corner of the second V-shaped frame 23 is fixed to the first buffer plate 21 with hot melt glue, and the two bottom ends are placed in the reserved groove of the second buffer plate 29.

[0056] Install the buffer column system: In the space formed by the alternating first V-shaped frame 22 and second V-shaped frame 23, install the first buffer column 24 with a diameter of 1.5cm and a length of 6cm through the arc-shaped fixing claw 25. Install the second buffer column 27 with a diameter of 1cm and a length of 6cm symmetrically above the outside of the second V-shaped frame 23 and fix it through the arc-shaped fixing claw 25. Install the third buffer column 28 with a diameter of 1cm and a length of 6cm symmetrically below the outside of the first V-shaped frame 22 and fix it through the arc-shaped fixing claw 25. Repeat the above steps to assemble multiple sets of anti-bending components 2 at equal intervals along the width direction of the strip to form a three-dimensional skeleton network.

[0057] The second buffer column 27 and the third buffer column 28 have the same elastic modulus, and the elastic modulus of the first buffer column 24 is 4 times that of the second buffer column 27 and the third buffer column 28.

[0058] S2. Preparation of the main slurry for the strip board

[0059] Vinyltriethoxysilane was dissolved in an aqueous ethanol solution (water:ethanol mass ratio 1:3) (concentration of vinyltriethoxysilane 8wt%) to obtain a coupling agent solution. Natural rubber fibers (length 0.2mm, diameter 20μm) and basalt fibers (length 5cm, diameter 150μm) were immersed in the coupling agent solution for 4h, with a natural rubber fiber / basalt fiber:coupling agent solution ratio of 1:10 (mass ratio). After drying, they were placed in an oven at 100℃ to obtain modified natural rubber fibers and modified basalt fibers. The modified natural rubber fibers and modified basalt fibers were added to an appropriate amount of tetrahydrofuran at a ratio of 1:20 (mass ratio), followed by the addition of dimethyl benzoate. The mixture was stirred until homogeneous, with a natural rubber fiber:dimethyl benzoate mass ratio of 100:1. The mixture was irradiated under a UV lamp and stirred for 30-60 min. After filtration and separation, the mixture was washed with deionized water to obtain composite fibers.

[0060] 10.0 g of hollow glass beads (particle size 150 μm, sphere wall thickness 20 μm) were added to 150 mL of deionized water and ultrasonically dispersed. Then, 1.5 g of ZrOCl2·8H2O was added and mixed thoroughly. Then, 5 mL of 13% ammonia water was slowly added dropwise while stirring. Next, 0.20 g of propyltriethoxysilane was added and mixed thoroughly to obtain a suspension. The suspension was placed in a high-pressure reactor for hydrothermal reaction. The synthesis temperature was increased at a rate of 3 °C / min, and after heating to 210 °C, it was held at this temperature for 1.5 h. The mixture was then filtered to separate the zirconium-loaded hollow glass beads, and washed with deionized water until no Cl was detected. -The intermediate was dried at 100℃ for 12 hours to obtain the intermediate. Propyltriethoxysilane was dissolved in an aqueous ethanol solution (water:ethanol mass ratio of 1:10) (5wt% concentration of propyltriethoxysilane) to obtain a coupling agent solution. The intermediate was immersed in the coupling agent solution for 4 hours, with the intermediate:coupling agent solution ratio of 1:10 (mass ratio). Then, it was air-dried and placed in an oven at 100℃ to obtain the modified hardening filler.

[0061] Add 80 parts gypsum, 30 parts hemihydrate gypsum, 20 parts asbestos cement, 20 parts modified hardening filler, 10 parts composite fiber, and 1 part polycarboxylate superplasticizer to a mixer and dry mix at 800 r / min for 5 minutes. Add 100 parts water in three batches, with a 2-minute interval between each batch, and gradually increase the mixing speed to 1200 r / min. The total mixing time is 15 minutes to obtain a uniform slurry.

[0062] S3, Casting and Curing

[0063] A release agent is applied to the inner wall of the steel mold, and a core rod forming a tenon 11, a mortise 12, and a hole 13 is pre-embedded. The assembled anti-bending component 2 is placed parallel between the adjacent hole core rods to ensure that the buffer plate is parallel to the length direction of the strip.

[0064] First, pour a 5cm thick layer of grout as the base layer; after placing the skeleton, pour a second layer to the designed thickness (40cm), and use a vibrating table to vibrate at a frequency of 50Hz for 3 minutes to remove air bubbles.

[0065] After initial setting (approximately 45 minutes), the mandrel is removed to create holes 13; the mixture is then cured at 25°C and RH≥90% for 72 hours; finally, it is transferred to a 40°C drying kiln and dried for 48 hours until the moisture content is <3%.

[0066] In practical applications, using the same preparation method, 60mm thick gypsum board with embedded impact-resistant component 2 (I) and 60mm thick gypsum board without embedded impact-resistant component 2 (II) were prepared. Impact resistance, bending failure load, and compressive strength were tested according to JC / T 829-2010 Gypsum Hollow Core Board and JG / T 169-2016 General Technical Requirements for Lightweight Boards for Building Partitions. The results are shown in the table below.

[0067]

[0068] (Note: Impact resistance is the number of impacts required for a through crack to appear in the gypsum board.)

[0069] By comparing the data in the table, it can be seen that the gypsum board (I) with the implanted impact-resistant component 2 (i.e. flexural component 2) is significantly better than the gypsum board (II) without the implanted impact-resistant component 2 in terms of impact resistance, flexural failure load, and compressive strength. Specifically, the impact resistance of gypsum board (I) reaches 35 cycles, far exceeding the 15 cycles of gypsum board (II); the bending failure load is 5.0 times the self-weight of the board, also significantly higher than the 2.5 times of gypsum board (II); the compressive strength is 12.7 MPa, also significantly higher than the 5.9 MPa of gypsum board (II). Furthermore, all performance indicators of gypsum board (I) far exceed the standard indicators specified in "JC / T 829-2010 Gypsum Hollow Core Board" and "JG / T 169-2016 General Technical Requirements for Lightweight Boards for Building Partitions". This fully demonstrates that the high-strength gypsum board with compressive and flexural strength provided by this invention can effectively improve the compressive and flexural strength of the gypsum board and enhance its overall strength and stability by setting the flexural strength component 2.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-strength gypsum board with pressure and flexural strength, comprising a board body (1) and a plurality of flexural strength components (2) disposed within the board body (1), characterized in that, The anti-bending components (2) are equidistantly distributed within the strip body (1) along the width direction of the strip body (1). Each set of anti-bending components (2) includes a first buffer plate (21) and a second buffer plate (29) arranged parallel to each other, several first V-shaped frames (22) and second V-shaped frames (23) arranged between the first buffer plate (21) and the second buffer plate (29), and several arc-shaped fixing claws (25). The first V-shaped frames (22) and the second V-shaped frames (23) are positioned between the first buffer plate (21) and the second buffer plate (29). The buffer plates (29) are alternately arranged. The adjacent first V-shaped frame (22) and second V-shaped frame (23) are oriented opposite to each other and arranged in opposite directions. The first V-shaped frame (22) and second V-shaped frame (23) are provided with a common first buffer column (24) on their inner side. The first buffer column (24) is connected to the inner top corner of the first V-shaped frame (22) and second V-shaped frame (23) respectively through the arc surface fixing claw (25). The fixing arc surface of the arc surface fixing claw (25) is connected to the first buffer column (24).

2. The high-strength gypsum board with pressure and flexural strength according to claim 1, characterized in that, The top corner of the first V-shaped frame (22) is connected to the second buffer plate (29), the two bottom ends of the first V-shaped frame (22) are connected to the first buffer plate (21), the top corner of the second V-shaped frame (23) is connected to the first buffer plate (21), and the two bottom ends of the second V-shaped frame (23) are connected to the second buffer plate (29), so that the adjacent first V-shaped frames (22) and second V-shaped frames (23) are arranged in opposite directions.

3. The high-strength gypsum board with pressure and flexural strength according to claim 1, characterized in that, The second V-shaped frame (23) is symmetrically provided with a second buffer column (27) on its outer side. The second buffer column (27) is connected to the first buffer plate (21) and the corresponding side surface of the second V-shaped frame (23) below it through the arc-shaped fixing claw (25).

4. The high-strength gypsum board with pressure and flexural strength according to claim 1, characterized in that, The first V-shaped frame (22) is symmetrically provided with a third buffer column (28) on its outer side. The third buffer column (28) is connected to the second buffer plate (29) and the corresponding side surface of the first V-shaped frame (22) above it by arc-shaped fixing claws (25).

5. The high-strength gypsum board resistant to pressure and bending according to claim 1, characterized in that, The main body of the strip (1) is provided with tenons (11) and mortises (12) that cooperate with the tenons (11) on the left and right sides respectively. The interior of the main body of the strip (1) is provided with a number of holes (13) that are arranged through the length of the main body of the strip (1) and are evenly distributed. The anti-bending component (2) is arranged between adjacent holes (13).

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