Pressure-resistant and fracture-resistant high-strength gypsum batten

Abstract

The invention relates to the technical field of structural members, and particularly discloses a pressure-resistant and fracture-resistant high-strength gypsum batten which structurally comprises a batten body and a plurality of fracture-resistant assemblies distributed in the batten body at equal intervals in the width direction, the fracture-resistant assemblies are arranged between adjacent holes, and each fracture-resistant assembly comprises a first buffer plate and a second buffer plate which are parallel up and down; a first V-shaped frame and a second V-shaped frame are alternately and reversely arranged between the first V-shaped frame and the second V-shaped frame, the inner sides of the first V-shaped frame and the second V-shaped frame are connected and share a first buffer column through cambered surface fixing claws, and a second buffer column and a third buffer column are connected above the outer side of the second V-shaped frame and below the outer side of the first V-shaped frame through cambered surface fixing claws respectively; the batten body is composed of gypsum, semi-hydrated gypsum, asbestos cement, composite fibers, modified hardening filler and other raw materials, the fracture resistance of the gypsum batten is effectively improved through the structural design of the fracture-resistant assembly, and meanwhile the compression resistance and fracture resistance of the gypsum batten are improved in an auxiliary mode through the batten body raw material formula.

Description

Technical Field

[0001] The invention relates to the technical field of structural components, in particular to a high-strength gypsum strip board that is resistant to pressure and bending. Background Art

[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 interior space division needs. In commercial building zoning scenarios, it can flexibly separate different functional areas to meet diverse business operations. Traditional gypsum board can also play a role in non-load-bearing partitions in industrial plants, enabling rational internal space planning. Traditional gypsum board typically uses a mortise and tenon joint structure with ridges and grooves for horizontal or vertical assembly. This simple assembly method helps improve construction efficiency. Furthermore, the through-holes within the board improve sound and thermal insulation to a certain extent, reducing the weight of the board itself and meeting the requirements of lightweight construction. However, traditional gypsum board has a significant drawback: due to the inherent brittleness of gypsum, its compressive and flexural properties are poor. When subjected to external forces, it is prone to cracking or even breaking, which not only affects the overall stability and safety of the building structure but also increases subsequent maintenance costs.

[0003] Based on the above situation, in the prior art, patent number CN202110595611.5 discloses a high-compressive-strength gypsum board and its preparation method. The gypsum board is mainly composed of a base layer, a reinforcing strip, an adhesive layer, a waterproof layer and a buffer layer. The base layer is made of gypsum material, and a plurality of reinforcing strips made of glass fiber material are evenly distributed inside the base layer to improve the compressive and flexural resistance of the gypsum board. An adhesive layer is provided on the outside of the base layer. The adhesive layer is made of white latex material and is mainly used to firmly bond the base layer and the waterproof layer together to ensure the integrity and stability between the layers. The waterproof layer is made of PP material, which can effectively prevent moisture from penetrating into the interior of the gypsum board and avoid the performance degradation of the gypsum board due to moisture erosion. The outermost buffer layer is made of EVA sponge material, which can buffer the external impact force to a certain extent and reduce damage to the main body of the gypsum board.

[0004] Although the above-mentioned gypsum board has improved the compressive resistance to a certain extent through this multi-layer structural design, the gypsum board in the existing technology still has the problem of insufficient compressive and flexural resistance when facing large and continuous pressure loads. Specifically, under the action of continuous pressure, the glass fiber reinforcement strips are prone to delamination between the reinforcement strips and the base layer, resulting in the reinforcement strips being unable to fully exert their reinforcing effect. At the same time, although the multi-layer composite structure optimizes functional protection, it does not solve the problem of ineffective stress transmission caused by differences in the material properties of each layer. Summary of the Invention

[0005] In view of the technical defects existing in the background technology, the present invention proposes a high-strength gypsum board that is resistant to pressure and bending. In order to further solve the above technical problems and meet actual needs, the specific technical solution is as follows: A high-strength gypsum strip board that is resistant to pressure and bending, includes a strip board main body and several groups of anti-bending components arranged in the strip board main body, the anti-bending components are equidistantly distributed in the strip board main body along the width direction of the strip board main body, a single group of the anti-bending components includes a first buffer plate and a second buffer plate arranged in parallel above and below, several first V-shaped frames and a second V-shaped frames arranged between the first buffer plate and the second buffer plate, and several arc-surface fixing claws, the first V-shaped frames and the second V-shaped frames are alternately arranged between the first buffer plate and the second buffer plate, and the adjacent first V-shaped frames and the second V-shaped frames are oriented relative to each other and are arranged in opposite directions, a common first buffer column is provided on the inner side of the first V-frame and the second V-frame, the first buffer column is connected to the inner top corners of the first V-frame and the second V-frame respectively through the arc-surface fixing claws, and the fixed arc surface of the arc-surface fixing claw is connected to the first buffer column.

[0006] As a further technical solution of the present invention, the second V-shaped frame is symmetrically provided with a second buffer column above its outer side, and the second buffer column is connected to the first buffer plate and the side surface of the corresponding second V-shaped frame below it through arc-surface fixing claws.

[0007] 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 side surface of the first V-shaped frame above it through arc-surface fixing claws.

[0008] As a further technical solution of the present invention, tenons and mortise grooves cooperating with the tenons are respectively provided on the left and right sides of the strip body, and a plurality of holes are provided inside the strip body that are arranged through the length direction of the strip body and distributed equidistantly, and the anti-bending component is arranged between adjacent holes.

[0009] As a further technical solution of the present invention, the main body of the strip is composed of the following raw materials in weight fractions: 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 reducer, and 50-200 parts of water; The composite fiber consists of basalt fiber and elastic fiber coated on the surface of glass fiber, and the modified hardening filler consists of hollow glass bead powder and a zirconium dioxide hardening layer coated on the surface of the hollow glass bead powder.

[0010] As a further technical solution of the present invention, the length of the basalt fiber is 2-5 cm and the diameter is 100-200 μm, the length of the glass fiber is 0.1-0.2 mm and the diameter is 10-20 μm, the particle size of the hollow glass bead powder is 100-150 μm, the ball wall thickness of the hollow glass bead powder is 10-20 μm, and the thickness of the zirconium dioxide hardening layer is 0.01-0.05 μm.

[0011] As a further technical solution of the present invention, the water reducer is selected from any one of a polycarboxylate water reducer, an aminosulfonate-based high-efficiency water reducer and a melamine-based water reducer.

[0012] The beneficial effects of the present invention are: The anti-flexural component of the present invention effectively improves the anti-flexural performance of the gypsum strip board through structures such as the first buffer plate, the second buffer plate, the first V-shaped frame and the second V-shaped frame arranged alternately in opposite directions, and the buffer column. The alternating and opposite directions of the V-shaped frames and the supporting effect of the buffer column can disperse and buffer external forces, reducing the risk of the gypsum strip board breaking when subjected to force. The strip board body is made of gypsum and semi-hydrated gypsum, composite fiber, modified hardening filler, asbestos cement and other raw materials to give the strip board basic strength. The composite fiber enhances the toughness of the strip board body, and the modified hardening filler improves the hardness of the strip board body. The use of water reducer can improve the fluidity of the material, make the internal structure of the strip board body denser, and comprehensively improve the pressure resistance and anti-flexural performance of the gypsum strip board. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the internal structure of the gypsum board of the present invention.

[0014] Figure 2 For the Figure 1 Cross-section at AA.

[0015] Figure 3 For the Figure 1 Cross-section at the middle BB.

[0016] Figure markings: 1-strip body; 11-tenon; 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 column; 25-arc-surface fixing claw; 27-second buffer column; 28-third buffer column; 29-second buffer plate. DETAILED DESCRIPTION

[0017] like Figures 1 to 3As shown, the present invention provides a technical solution: a high-strength gypsum strip board that is resistant to pressure and bending, comprising a strip board body 1 and several groups of anti-bending components 2 arranged in the strip board body 1, the anti-bending components 2 are equidistantly distributed in the strip board body 1 along the width direction of the strip board body 1, a single group of the anti-bending components 2 comprises a first buffer plate 21 and a second buffer plate 29 arranged in parallel above and below, a plurality of first V-shaped frames 22 and a second V-shaped frames 23 arranged between the first buffer plate 21 and the second buffer plate 29, and a plurality of arc-surface 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, the adjacent first V-shaped frames 22 and the second V-shaped frames 23 are oriented oppositely and are arranged in opposite directions, a common first buffer column 24 is arranged 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 top corners of the first V-shaped frame 22 and the second V-shaped frame 23 respectively through the arc-surface fixing claws 25, and the fixed arc surface of the arc-surface fixing claw 25 is connected to the first buffer column 24.

[0018] Furthermore, in the above scheme, the top corners of the first V-shaped frame 22 are 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 corners of the second V-shaped frame 23 are 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 set in reverse.

[0019] The anti-bend components 2 are evenly spaced across the width of the slat body 1. Each anti-bend component 2 includes a first buffer plate 21 and a second buffer plate 29, arranged in parallel above and below, a plurality of first and second V-shaped frames 22 and 23, and a plurality of curved fixing claws 25. The first and second V-shaped frames 22 and 23 are alternately arranged between the first and second buffer plates 21 and 29. Adjacent first and second V-shaped frames 22 and 23 face opposite and in opposite directions. Common first buffer columns 24 are located inside the first and second V-shaped frames 22 and 23. These columns are connected to the inner corners of the first and second V-shaped frames 22 and 23 via curved fixing claws 25, thus forming a stable skeleton structure within the gypsum slat.

[0020] Specifically, the first V-shaped frames 22 and the second V-shaped frames 23 are arranged alternately and in opposite directions between the first buffer plate 21 and the second buffer plate 29. The top corners of the first V-shaped frames 22 are connected to the second buffer plate 29, and the two bottom ends are connected to the first buffer plate 21. The top corners of the second V-shaped frames 23 are connected to the first buffer plate 21, and the two bottom ends are connected to the second buffer plate 29. This connection method creates a three-dimensional and stable skeleton structure, forming multiple mutually supporting mechanical units within the gypsum strip board, effectively enhancing the overall compression and flexural properties of the gypsum strip board.

[0021] The alternating arrangement of the first and second V-shaped frames 22, 23 in opposite directions creates a skeleton structure, which, along with its secure connection to the first and second buffer plates 21, 29, forms a highly stable mechanical system. When subjected to external forces, the components support each other, effectively resisting deformation. Even when the slats are subjected to significant pressure or bending forces, the skeleton structure maintains its shape and integrity, making it less susceptible to distortion or breakage. This effectively improves the gypsum slats' resistance to pressure and bending, extending their service life.

[0022] like Figures 1 to 3 As shown, as one of the preferred embodiments of the present invention, the second V-shaped frame 23 is symmetrically provided with a second buffer column 27 on the upper side of the outer side thereof, and the second buffer column 27 is respectively connected to the first buffer plate 21 and the side surface of the second V-shaped frame 23 corresponding thereto through an arc-surface fixing claw 25; the first V-shaped frame 22 is symmetrically provided with a third buffer column 28 on the lower side of the outer side thereof, and the third buffer column 28 is respectively connected to the second buffer plate 29 and the side surface of the first V-shaped frame 22 corresponding thereto through an arc-surface fixing claw 25.

[0023] Specifically, the first buffer column 24, the second buffer column 27 and the third buffer column 28 are highly elastic rubber or polyurethane elastomers with good elasticity and deformation recovery capabilities. 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 2-4 times the elastic modulus of the second buffer column 27 and the third buffer column 28.

[0024] 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 cooperates with the second buffer column 27 and the third buffer column 28 to achieve multi-path transmission and dispersion of pressure and effectively absorb pressure.

[0025] When pressure acts on the first buffer plate 21, the first buffer plate 21 directly transmits the pressure to the top corner of the second V-shaped frame 23 and the two bottom ends of the first V-shaped frame 22, thereby dispersing the pressure to the entire skeleton structure. Part of the pressure is transmitted to the second buffer column 27 above the outer side of the second V-shaped frame 23 through the arc-surface fixing claws 25. The second buffer column 27 absorbs part of the pressure, reducing the pressure peak directly acting on the skeleton structure. The unabsorbed pressure is then transmitted to the two side surfaces of the outside of the second V-shaped frame 23 through the arc-surface fixing claws 25, and together with the pressure directly acting on the top corner of the second V-shaped frame 23, it squeezes the first buffer column 24, so that the pressure is further absorbed and dispersed; the pressure acting on the two bottom ends of the first V-shaped frame 22 is transmitted through the first V-shaped frame 22 and the arc-surface fixing claws 25 to act on the two third buffer columns 28 below the first V-shaped frame 22. The third buffer columns 28 absorb the pressure, reducing the pressure concentration in this area. This multi-path pressure transmission and absorption mechanism enables 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 anti-flexure performance of the gypsum board.

[0026] When pressure acts on the second buffer plate 29, the pressure is transmitted from the second buffer plate 29 to the top corner of the first V-shaped frame 22 and the two bottom ends of the second V-shaped frame 23, thereby dispersing the pressure. Part of the pressure is transmitted through the arc-surface fixing claws 25 to the third buffer column 28 below the outer side of the first V-shaped frame 22. The third buffer column 28 absorbs the pressure, reducing the pressure on the skeleton structure. The third buffer column 28 transmits the unabsorbed pressure to the two side surfaces of the outside of the first V-shaped frame 22 through the arc-surface fixing claws 25. Together with the pressure directly acting on the top corner of the first V-shaped frame 22, it squeezes the first buffer column 24 to further absorb the pressure. The pressure acting on the two bottom ends of the second V-shaped frame 23 is transmitted through the second V-shaped frame 23 and the arc-surface fixing claws 25 to the two second buffer columns 27 above the second V-shaped frame 23. The second buffer columns 27 absorb the pressure. This multi-path pressure transmission and absorption method effectively disperses the pressure acting on the second buffer plate 29, enhancing the gypsum board's ability to withstand pressure and resist bending.

[0027] like Figure 2 and Figure 3 As shown, as one of the preferred embodiments of the present invention, the left and right sides of the strip body 1 are respectively provided with a tenon 11 and a tenon groove 12 cooperating with the tenon 11, and the interior of the strip body 1 is provided with a plurality of holes 13 that are set through and equidistantly distributed along the length direction of the strip body 1, and the anti-bending component 2 is arranged between adjacent holes 13.

[0028] Tenons 11 and grooves 12 are provided on the left and right sides of the slat body 1, respectively. During construction, construction workers simply insert the tenon 11 of one slat into the groove 12 of another slat to quickly connect the slats, improving construction efficiency. Positioning the anti-bend assembly 2 between adjacent holes 13 fully utilizes the space within the slat body 1, allowing the anti-bend assembly 2 to form a reasonable mechanical support system within the slat. While the holes 13 reduce the weight of the slat, the anti-bend assembly 2, through its unique V-shaped frame and buffer column structure, provides the slat with strong anti-bend and anti-compression capabilities. The synergistic effect of these two factors ensures that the slat remains lightweight while possessing greater strength and stability.

[0029] As one of the preferred embodiments of the present invention, the strip board body 1 is composed of the following raw materials in weight fractions: 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 reducer, and 50-200 parts of water; The composite fiber consists of basalt fiber and elastic fiber coated on the surface of the basalt fiber, and the modified hardening filler consists of hollow glass bead powder and a zirconium dioxide hardening layer coated on the surface of the hollow glass bead powder.

[0030] Specifically, the strip board body 1 is composed of the following raw materials in parts by weight: 80 parts of gypsum, 30 parts of hemihydrate gypsum, 20 parts of asbestos cement, 10 parts of composite fiber, 20 parts of modified hardening filler, 1 part of water reducing agent, and 100 parts of water.

[0031] Among the constituent raw materials of the above-mentioned strip board main body 1, 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 of the modified hardening filler itself has certain strength and light weight characteristics, and its hollow structure can absorb and disperse external pressure to a certain extent, while the zirconium dioxide hardening layer coated on its surface, zirconium dioxide itself has high hardness, high strength and other characteristics, which can effectively improve the surface hardness and overall strength of the hollow glass bead powder. When the strip board main body 1 is under 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, and prevent the gypsum matrix from undergoing excessive deformation or damage under pressure, thereby increasing the compressive and flexural resistance of the strip board main body 1, and then helping to increase the overall compressive and flexural resistance of the gypsum strip board.

[0032] Among the constituent materials of the above-mentioned strip board main body 1, 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. It can play a role in strengthening and toughening in the strip board main body 1. When the strip board 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 board from breaking due to excessive crack development. The elastic fiber coated on the surface of the basalt fiber has good flexibility and elasticity, and can buffer and absorb external force to a certain extent, so that the composite fiber can undergo a certain deformation without being destroyed when subjected to external force, avoiding stress concentration leading to brittle fracture, and at the same time evenly transmitting the external force to the surrounding gypsum matrix, so that the composite fiber can effectively improve the tensile strength and toughness of the strip board main body 1, so that the gypsum strip board can better resist deformation and damage when subjected to pressure and bending force, thereby helping to increase the overall pressure and flexural resistance of the gypsum strip board.

[0033] As one of the preferred embodiments of the present invention, the length of the basalt fiber is 2-5 cm, the diameter of the basalt fiber is 100-200 μm, the length of the elastic fiber is 0.1-0.2 mm, the diameter of the elastic fiber is 10-20 μm, the particle size of the hollow glass bead powder is 100-150 μm, the ball wall thickness of the hollow glass bead powder is 10-20 μm, and the thickness of the zirconium dioxide hardening layer is 0.01-0.05 μm.

[0034] Specifically, the elastic fiber is a natural rubber fiber obtained by polymerizing cis-1,4-polyisoprene. The elastic modulus of the natural rubber fiber is 1.72 MPa and the tensile strength is 22.8 MPa.

[0035] Composite fibers can be prepared by the following methods: Vinyltriethoxysilane was dissolved in an ethanol aqueous solution (the mass ratio of water to ethanol was 1:3) (the concentration of vinyltriethoxysilane was 8 wt%) to obtain a coupling agent solution. Natural rubber fiber (length 0.2 mm, diameter 20 μm) and basalt fiber (length 5 cm, diameter 150 μm) were respectively placed in the coupling agent solution and immersed for 4 h. The natural rubber fiber / basalt fiber: coupling agent solution = 1:10 (mass ratio). Then, after drying, the modified natural rubber fiber and modified basalt fiber were dried in an oven at 100 ° C.

[0036] Modified natural rubber fiber and modified basalt fiber were added to an appropriate amount of tetrahydrofuran in a ratio of 1:20 (mass ratio), and then benzoin dimethyl ether was added and mixed. The mass ratio of natural rubber fiber to benzoin dimethyl ether was 100:1. The mixture was irradiated under ultraviolet light and stirred for 30-60 minutes. The mixture was filtered and separated, and washed with deionized water to obtain a composite fiber.

[0037] In the above-mentioned composite fiber preparation method, the vinyl groups on the surface of the modified natural rubber fiber and the carbon-carbon double bonds within 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 be coated on the surface of the modified basalt fiber to obtain a composite fiber.

[0038] Modified hardening fillers can be made by the following methods: 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. 1.5 g of ZrOCl2·8H2O was then added and mixed evenly. 5 mL of 13% ammonia water was then slowly added dropwise while stirring. 0.20 g of propyltriethoxysilane was then added and mixed evenly to obtain a suspension. The suspension was placed in a high-pressure reactor for hydrothermal reaction. The synthesis heating rate was 3 ° C / min. After heating to 210 ° C, it was kept warm for 1.5 hours, and then filtered to separate the hollow glass beads loaded with zirconium dioxide. It was washed with deionized water until no Cl was detected. - , and dried at 100°C for 12 h to obtain an intermediate.

[0039] Propyltriethoxysilane was dissolved in an ethanol aqueous solution (the mass ratio of water to ethanol was 1:10) (the concentration of propyltriethoxysilane was 5 wt%) to obtain a coupling agent solution. The intermediate was immersed in the coupling agent solution for 4 hours, and the intermediate: coupling agent solution = 1:10 (mass ratio). Then, it was dried in an oven at 100°C to obtain a modified hardening filler.

[0040] By using the above-mentioned method for preparing a modified hardening filler, a modified hardening filler having a zirconium dioxide hardening layer with a thickness of 0.05 μm can be obtained, and the modified hardening filler has good dispersibility in the main body slurry of the strip board.

[0041] 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, and 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 the hollow glass bead powder and the surface hydroxyl groups of the zirconium dioxide microspheres, respectively, so that the zirconium dioxide microspheres are loaded on the surface of the hollow glass bead powder to form a zirconium dioxide hardening layer. On the other hand, the surface silanol groups of the zirconium dioxide microspheres not loaded on the surface of the hollow glass bead powder react with C3H7Si(OH)3, so that -SiC3H7 groups are grafted on the surface of the zirconium dioxide microspheres. This creates a distance effect between the zirconium dioxide microspheres not loaded on the surface of the hollow glass bead powder, thereby preventing the zirconium dioxide microspheres from agglomerating.

[0042] As one of the preferred embodiments of the present invention, the water reducer is selected from any one of a polycarboxylate water reducer, an aminosulfonate-based high-efficiency water reducer, and a melamine-based water reducer.

[0043] The water reducer is preferably a polycarboxylate superplasticizer. This is used to improve the fluidity and workability of the gypsum slurry, reduce water consumption, and increase the density and strength of the gypsum board. Polycarboxylate superplasticizers adsorb on 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. Furthermore, the water reducer can reduce water consumption and increase the density and strength of the material.

[0044] The technical solution of the gypsum board is described below by using a preparation example.

[0045] The method for preparing high-strength gypsum board that is resistant to pressure and bending comprises the following steps: S1. Assemble the skeleton structure Prepare the first buffer plate 21 and the second buffer plate 29: Use a rubber plate with a thickness of 1 cm and a width of 8 cm, cut to match the design length of the gypsum strip board. 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. To make a V-shaped frame, use a 0.4 cm thick and 1 cm wide stainless steel plate, bend it at a 45° angle to form a V-shaped structure. The top corners of the first V-shaped frame 22 are fixed to the second buffer plate 29 by hot melt adhesive, and the two bottom ends are placed in the reserved grooves of the first buffer plate 21; the top corners of the second V-shaped frame 23 are fixed to the first buffer plate 21 by hot melt adhesive, and the two bottom ends are placed in the reserved grooves of the second buffer plate 29.

[0046] Install the buffer column system: In the space formed by the alternation of the first V-frame 22 and the second V-frame 23, install the first buffer column 24 with a diameter of 1.5 cm and a length of 6 cm using the curved fixing claws 25. Install the second buffer column 27 with a diameter of 1 cm and a length of 6 cm symmetrically above the outer side of the second V-frame 23 and fix it using the curved fixing claws 25. Install the third buffer column 28 with a diameter of 1 cm and a length of 6 cm symmetrically below the outer side of the first V-frame 22 and fix it using the curved fixing claws 25. Repeat the above steps to assemble multiple groups of anti-bending components 2 at equal intervals along the width direction of the strip to form a three-dimensional skeleton network.

[0047] 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 four times that of the second buffer column 27 and the third buffer column 28 .

[0048] S2. Preparation of main slurry for strip board Vinyltriethoxysilane was dissolved in an ethanol aqueous solution (the mass ratio of water to ethanol was 1:3) (the concentration of vinyltriethoxysilane was 8 wt%) to obtain a coupling agent solution. Natural rubber fiber (length 0.2 mm, diameter 20 μm) and basalt fiber (length 5 cm, diameter 150 μm) were respectively placed in the coupling agent solution and immersed for 4 h. The natural rubber fiber / basalt fiber: coupling agent solution = 1:10 (mass ratio). Then, after drying, the modified natural rubber fiber and modified basalt fiber were placed in an oven at 100 ° C to obtain modified natural rubber fiber and modified basalt fiber. The 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 and mixed. The mass ratio of natural rubber fiber to benzoin dimethyl ether was 100:1. The mixture was irradiated under ultraviolet light and stirred for 30-60 min. The mixture was filtered and separated, and washed with deionized water to obtain a composite fiber.

[0049] 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. 1.5 g of ZrOCl2·8H2O was then added and mixed evenly. 5 mL of 13% ammonia water was then slowly added dropwise while stirring. 0.20 g of propyltriethoxysilane was then added and mixed evenly to obtain a suspension. The suspension was placed in a high-pressure reactor for hydrothermal reaction at a heating rate of 3 °C / min. After heating to 210 °C, the mixture was kept warm for 1.5 h and then filtered to separate the hollow glass beads loaded with zirconium dioxide. The mixture was washed with deionized water until no Cl was detected. -The intermediate was dried at 100°C for 12 hours to obtain a coupling agent solution. Propyltriethoxysilane was dissolved in an ethanol aqueous solution (water:ethanol mass ratio of 1:10) (propyltriethoxysilane concentration of 5wt%) to obtain a coupling agent solution. The intermediate was immersed in the coupling agent solution for 4 hours (intermediate:coupling agent solution = 1:10 (mass ratio)). Then, it was dried in an oven at 100°C to obtain a modified hardening filler.

[0050] 80 parts of gypsum, 30 parts of hemihydrate gypsum, 20 parts of asbestos cement, 20 parts of modified hardening filler, 10 parts of composite fiber, and 1 part of polycarboxylate water reducer were put into a mixer and dry mixed at 800 r / min for 5 minutes. 100 parts of water were added three times with an interval of 2 minutes each time. The stirring speed was gradually increased to 1200 r / min. The total stirring time was 15 minutes to obtain a uniform slurry.

[0051] S3, casting and curing A release agent is applied to the inner wall of the steel mold, and the modules forming the tenon 11, the tenon groove 12 and the core rod of the hole 13 are embedded in advance. The assembled anti-bending component 2 is placed parallel to the core rods of adjacent holes to ensure that the buffer plate is parallel to the length direction of the strip plate.

[0052] First, pour 5cm thick slurry as the base layer; after placing the skeleton, pour it a second time to the designed thickness (40cm), and use a vibration table to vibrate at a frequency of 50Hz for 3 minutes to remove bubbles.

[0053] After initial setting (about 45 minutes), the core rod is removed to form the hole 13; the material is cured in an environment of 25°C and RH ≥ 90% for 72 hours; and the material is transferred to a drying kiln at 40°C and dried for 48 hours until the moisture content is less than 3%. In actual application, under the same preparation method, a 60 mm thick gypsum strip board (I) with an embedded impact-resistant component 2 and a 60 mm thick gypsum strip board (II) without an embedded impact-resistant component 2 were prepared. The impact resistance, bending failure load, compressive strength and other items were tested with reference to "JC / T 829-2010 Gypsum Hollow Strip Board" and "JG / T 169-2016 General Technical Requirements for Lightweight Strip Boards for Building Partition Walls". The results are shown in the following table:

[0054] (Note: Impact resistance refers to the number of impacts when through cracks appear on the gypsum board) From the data in the comparison table, it can be seen that the gypsum strip board (1) implanted with the impact-resistant component 2 (i.e., the anti-flexural component 2) is significantly superior to the gypsum strip board (2) not implanted with the impact-resistant component 2 in terms of impact resistance, bending failure load, and compressive strength. Specifically, the impact resistance of the gypsum strip board (I) reaches 35 times, which is much higher than the 15 times of the gypsum strip board (II); the bending failure load is 5.0 times the weight of the board, which is also significantly higher than the 2.5 times of the gypsum strip board (II); the compressive strength is 12.7 MPa, which is also significantly ahead of the 5.9 MPa of the gypsum strip board (II), and all performance indicators of the gypsum strip board (I) far exceed the standard indicators specified in "JC / T 829-2010 Gypsum Hollow Strip Board" and "JG / T 169-2016 General Technical Requirements for Lightweight Strip Boards for Building Partition Walls". This fully demonstrates that the high-strength gypsum strip board with pressure resistance and flexural resistance provided by the present invention can effectively improve the pressure resistance and flexural resistance of the gypsum strip board and enhance its overall strength and stability by setting the anti-flexural component 2.

[0055] The above description is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-strength gypsum strip board that is resistant to pressure and bending, comprising a strip board body (1) and a plurality of groups of anti-bending components (2) arranged in the strip 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). A single group of the anti-bending components (2) comprises a first buffer plate (21) and a second buffer plate (29) arranged in parallel above and below, a plurality of first V-shaped frames (22) and a second V-shaped frame (23) arranged between the first buffer plate (21) and the second buffer plate (29), and a plurality of arc-surface fixing claws (25). The first V-shaped frame (22) and the second V-shaped frame (23) are arranged between the first buffer plate (21) and the second buffer plate (29). The buffer plates (29) are alternately arranged, and the adjacent first V-shaped frames (22) and second V-shaped frames (23) are arranged in opposite directions. A common first buffer column (24) is arranged 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 top corners of the first V-shaped frame (22) and the second V-shaped frame (23) respectively through an arc-surface fixing claw (25), and the fixed arc surface of the arc-surface fixing claw (25) is connected to the first buffer column (24).

2. The high-strength gypsum board with compression and bending resistance 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 reverse.

3. The high-strength gypsum board with compression and bending resistance according to claim 1, characterized in that: A second buffer column (27) is symmetrically arranged above the outer side of the second V-shaped frame (23), and the second buffer column (27) is connected to the first buffer plate (21) and a side surface of the corresponding second V-shaped frame (23) below it through arc-surface fixing claws (25).

4. The high-strength gypsum board with compression and bending resistance according to claim 1, characterized in that: A third buffer column (28) is symmetrically provided below the outer side of the first V-shaped frame (22), and the third buffer column (28) is connected to the second buffer plate (29) and a side surface of the first V-shaped frame (22) above it respectively through arc-surface fixing claws (25).

5. The high-strength gypsum board with compression and bending resistance according to claim 1, characterized in that: The left and right sides of the strip board body (1) are respectively provided with a tenon (11) and a tenon groove (12) matched with the tenon (11); the interior of the strip board body (1) is provided with a plurality of holes (13) which are arranged through the strip board body (1) in a longitudinal direction and are evenly distributed; the anti-bending component (2) is arranged between adjacent holes (13).

6. The high-strength gypsum board with compression and bending resistance according to claim 1, characterized in that: The strip board body (1) is composed of the following raw materials in weight fractions: 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; The composite fiber consists of basalt fiber and elastic fiber coated on the surface of the basalt fiber, and the modified hardening filler consists of hollow glass bead powder and a zirconium dioxide hardening layer coated on the surface of the hollow glass bead powder.

7. The high-strength gypsum board with compression and bending resistance according to claim 6, characterized in that: The length of the basalt fiber is 2-5 cm, the diameter of the basalt fiber is 100-200 μm, the length of the elastic fiber is 0.1-0.2 mm, the diameter of the elastic fiber is 10-20 μm, the particle size of the hollow glass bead powder is 100-150 μm, the ball wall thickness of the hollow glass bead powder is 10-20 μm, and the thickness of the zirconium dioxide hardening layer is 0.01-0.05 μm.

8. The high-strength gypsum board with compression and bending resistance according to claim 6, characterized in that: The water reducer is selected from any one of a polycarboxylate water reducer, an aminosulfonate-based high-efficiency water reducer and a melamine-based water reducer.

Images