High-fracture-resistance inorganic artificial stone and preparation method thereof

Abstract

The invention discloses a high-fracture-resistance inorganic artificial stone and a preparation method thereof. The inorganic artificial stone comprises a substrate plate and at least one layer of net-shaped structure embedded in the middle section of the substrate in the thickness direction, the net-shaped structure and the substrate form an integrated structure through directional pavement in the curing process of inorganic substance precursor slurry, and the plane extending direction of the net-shaped structure is perpendicular to the thickness direction of the plate. According to the method, a three-dimensional reinforced network is constructed in the inorganic artificial stone by optimizing a reinforcement arrangement mode and a synchronous forming process, so that the beneficial effect of relatively high breaking strength improvement is achieved at low cost. The method breaks through the technical bottleneck that the fracture resistance of the inorganic artificial stone cannot be further effectively enhanced only by adjusting the adding amount of the enhancing raw materials in the traditional method, and is particularly suitable for industrial production of the large-size ultra-thin inorganic artificial stone.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and particularly to a high flexural strength inorganic artificial stone and a preparation method thereof. Background Art

[0002] Inorganic artificial stone is an artificially synthesized building decoration material, which is widely used in the field of building decoration due to its stable physical and chemical properties and excellent decoration functions. Inorganic artificial stone uses various types of cement as a binder. The inorganic artificial stone has good compressive properties but poor flexural properties and is prone to cracking when subjected to external forces.

[0003] Currently, in order to improve the flexural strength of inorganic artificial stone, the methods adopted are mainly divided into two categories: The first is to adopt a layered composite method. The production process flow in this type of preparation is complex and the cost increases; moreover, adhesives are used to bond between layers, which will cause the overall strength of the inorganic artificial stone to be weakened. The second category is to add fibers to the inorganic artificial stone. Since the water-binder ratio of the inorganic artificial stone is low, the fluidity of the mixture is low, and the added fibers are prone to agglomeration due to difficult dispersion, unable to play the effect of enhancing the flexural strength, and the high cost of the fibers also limits their large-scale application in inorganic artificial stone. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a high flexural strength inorganic artificial stone and a preparation method thereof, which solve the technical problem that the flexural strength of the existing inorganic artificial stone needs to be improved.

[0006] (II) Technical Solutions

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, an embodiment of the present invention provides a high flexural strength inorganic artificial stone, including an inorganic artificial stone slab and at least one layer of reticular structure embedded in the inorganic artificial stone slab, and the reticular structure is integrally formed with the inorganic artificial stone slab when the precursor slurry of the inorganic artificial stone slab hydrates;

[0009] The reticular structure is laid flat and perpendicular to the thickness direction of the inorganic artificial stone slab;

[0010] The reticular structure is located in the middle section of the thickness of the inorganic artificial stone slab.

[0011] As a preferred embodiment of the present invention, for the high flexural strength inorganic artificial stone, the area of the reticular structure is not less than the cross-section of the inorganic artificial stone slab perpendicular to the thickness direction;

[0012] The tensile strength of the mesh structure is ≥500 MPa; the mesh aperture of the mesh structure is ≤5 mm, and the wire diameter is 0.3 mm ≤ wire diameter ≤ 1 mm. Among them, the wire diameter can be dynamically adjusted according to the plate thickness, application scenario and process conditions. If the wire diameter is too large, it will affect the uniformity of the matrix material distribution, or there will be delamination, interface defects, and stress concentration caused by the rigidity difference between the mesh structure and the inorganic artificial stone slab.

[0013] As a preferred embodiment of the present invention, for the high flexural strength inorganic artificial stone, the mesh structure is selected from at least one of a fiber mesh and a stainless steel wire mesh; and one or more layers of the mesh structure are included in an inorganic artificial stone slab. When multiple layers of the mesh structure are provided in an inorganic artificial stone slab, the multiple layers of the mesh structure are spaced apart and arranged in the inorganic artificial stone slab.

[0014] As a preferred embodiment of the present invention, for the high flexural strength inorganic artificial stone, the inorganic artificial stone slab is obtained by casting and curing precursor slurry in a mold, and the precursor slurry includes a solid material and a liquid material;

[0015] Among them, the solid material includes, by weight: 55-65 parts of aggregate, 20-30 parts of cement, 5-10 parts of powder and 0.5-1 part of inorganic pigment;

[0016] The liquid material includes, by weight: 1-10 parts of toughening agent, 1-2 parts of water reducing agent, and 1-2 parts of water.

[0017] As a preferred embodiment of the present invention, for the high flexural strength inorganic artificial stone, the aggregate is selected from quartz sand or calcium sand;

[0018] The particle size range of the powder is 320-330 mesh, and the powder is at least one of silica powder, calcium powder and metakaolin.

[0019] As a preferred embodiment of the present invention, for the high flexural strength inorganic artificial stone, the toughening agent is styrene-butadiene emulsion or styrene-acrylic emulsion.

[0020] In a second aspect, an embodiment of the present invention provides a method for preparing the high flexural strength inorganic artificial stone according to the first aspect, including the following steps:

[0021] S1. Prepare the precursor slurry of the inorganic artificial stone slab;

[0022] S2. Pour 1 / 3-1 / 2 volume of the precursor slurry into the mold, lay the mesh structure flat on the surface of the precursor slurry in the mold. After initial pressing, pour the remaining precursor slurry into the mold for final pressing to obtain a green inorganic artificial stone slab;

[0023] S3. Cure and trim the green inorganic artificial stone slab to obtain the inorganic artificial stone.

[0024] As a preferred embodiment of the present invention, in the preparation method of the high flexural strength inorganic artificial stone, in S2, the initial pressing pressure is 5-10 MPa, and the final pressing pressure is 15-20 MPa.

[0025] By optimizing the arrangement mode of the reticulated structure reinforcement and the synchronous molding process, this method constructs a three-dimensional reinforcement network inside the inorganic artificial stone, and achieves the beneficial effect of improving the flexural strength at low cost. The present invention breaks through the technical bottleneck in the traditional method that the flexural performance of the inorganic artificial stone cannot be further effectively enhanced only by adjusting the addition amount of the reinforcing raw material, and is particularly suitable for the industrial production of large-size ultra-thin inorganic stones.

[0026] As a preferred embodiment of the present invention, in the preparation method of the high flexural strength inorganic artificial stone, in S2, if the reticulated structure is multi-layered, the volume of the precursor slurry poured into the mold before and after laying each reticulated structure is determined according to the preset spacing of the reticulated structure. After laying the reticulated structure on the surface of the precursor slurry each time, initial pressing is carried out; when all the precursor slurry is poured into the mold, final pressing is carried out.

[0027] As a preferred embodiment of the present invention, in the preparation method of the high flexural strength inorganic artificial stone, in S1, the preparation of the precursor slurry includes the following steps:

[0028] S11: Mix the aggregate and the inorganic pigment to obtain mixture A;

[0029] S12: Add cement and powder to mixture A, and mix to obtain mixture B;

[0030] S13: While stirring mixture B, add a mixture of water and water reducing agent, and after mixing evenly, add a toughening agent and stir evenly to obtain the precursor slurry.

[0031] (III) Beneficial effects

[0032] The beneficial effects of the present invention are as follows: A high flexural strength inorganic artificial stone and its preparation method according to the present invention address the technical problem that the flexural strength of existing inorganic artificial stones needs to be improved. By using a reticular structure to hydrate and integrally form with the slurry of the inorganic artificial stone, and the reticular structure is located in the middle thickness section of the inorganic artificial stone slab, a skeleton network can be formed inside the inorganic artificial stone slab. The reticular structure forms a mechanical interlock with the matrix of the inorganic artificial stone slab through the hydration reaction of the slurry, enhancing the integrity of the reticular structure and the inorganic artificial stone slab, and thus effectively improving the flexural strength of the slab. The reticular structure can also reduce the overall stress on the inorganic artificial stone slab and effectively reduce the occurrence of cracks. The reticular structure can also disperse the stress concentration generated inside the inorganic artificial stone slab due to stress, thereby preventing the slab from warping and deforming. This preparation method realizes the beneficial effect of improving the flexural strength at a low cost by optimizing the arrangement method of the reticular structure reinforcement and the synchronous forming process, and constructing a three-dimensional reinforcement network inside the inorganic artificial stone. The present invention breaks through the technical bottleneck in the traditional method that only adjusting the addition amount of the reinforcing raw material cannot further effectively enhance the flexural strength of the inorganic artificial stone. Compared with the prior art, based on maintaining the original crack resistance and deformation resistance characteristics of the inorganic artificial stone slab, this design significantly enhances the mechanical strength of the slab through structural innovation, while maintaining the production advantages of simple process flow and controllable cost.

[0033] The reticular structure covers the cross-section of the inorganic artificial stone slab to comprehensively improve the stress performance of the slab. The tensile strength of the reticular structure is ≥500 MPa, and a reticular structure with such strength can fully ensure the flexural strength. The pore diameter of the reticular structure is ≤5 mm and the wire diameter is ≥0.3 mm, which is beneficial to form a three-dimensional continuous skeleton structure between the reticular structure and the slurry of the inorganic artificial stone, form a rigid fulcrum for spatial connection, and improve the integrity of the reticular structure and the inorganic artificial stone slab.

[0034] When the inorganic artificial stone slab is relatively thick, the number of reticular structures needs to be increased. Multiple layers of the reticular structures are arranged at intervals inside the inorganic artificial stone slab, which is beneficial to improving the flexural strength of the artificial stone.

[0035] During the hydration of the precursor slurry of the inorganic artificial stone slab, the toughening agent and the reticular structure act synergistically. When the precursor slurry hydrates, it fills the microcracks of the inorganic artificial stone slab and improves the interfacial bonding force, further inhibiting crack propagation. The water reducing agent optimizes the fluidity of the mixture to ensure the uniform distribution of the reticular structure.

[0036] When preparing inorganic artificial stone, the initial pressing pressure is 5 - 10 MPa, and the final pressing pressure is 15 - 20 MPa. The step-by-step pressing process enables the reticulated structure to form a mechanical interlock with the matrix of the inorganic artificial stone slab, enhancing the integrity of the reticulated structure and the inorganic artificial stone slab, effectively solving the technical bottlenecks of the weakened overall strength caused by the delamination and lamination of inorganic artificial stone in the prior art and the poor flexural performance caused by the use of dispersed fibers. Detailed implementation mode

[0037] For a better explanation of the present invention for easy understanding, the present invention will be described in detail through specific implementation modes.

[0038] A high-flexural-strength inorganic artificial stone and its preparation method proposed in the embodiment of the present invention, due to the integrated molding of the reticulated structure and the slurry of the inorganic artificial stone through hydration, and the reticulated structure is located in the middle thickness section of the inorganic artificial stone slab, a skeleton network can be formed inside the inorganic artificial stone slab; the reticulated structure forms a mechanical interlock with the matrix of the inorganic artificial stone slab through the hydration reaction of the slurry, enhancing the integrity of the reticulated structure and the inorganic artificial stone slab, and thus effectively improving the flexural performance of the slab; the introduction of the reticulated structure can optimize the stress distribution inside the inorganic artificial stone slab and further enhance its flexural performance. Compared with the prior art, based on maintaining the original crack resistance and deformation resistance characteristics of the inorganic artificial stone slab, this design significantly enhances the mechanical strength of the slab through structural innovation while maintaining the production advantages of simple process flow and controllable cost.

[0039] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below. However, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0040] Example 1

[0041] This embodiment provides a preparation method of a high-flexural-strength inorganic artificial stone, which specifically includes the following steps:

[0042] (1) By weight, 55 - 65 parts of quartz sand and 0.5 - 1 part of inorganic pigment are premixed by low-speed stirring with a mixer to obtain a uniformly mixed material A; among them, the inorganic pigment is one or a mixture of titanium dioxide, iron red, iron yellow, or iron black, and is selected according to the color of the inorganic artificial stone.

[0043] (2) 20 - 30 parts of white cement and 5 - 10 parts of silica powder with a particle size of 325 mesh are added to the mixed material A and stirred. After stirring evenly, a mixed material B is obtained.

[0044] (3) While stirring the mixture B, add a mixture of water and water reducer (1 - 2 parts of water reducer and 1 - 2 parts of water). After the addition of the mixture is complete, continue stirring for 5 - 15 minutes. After thorough mixing, add 10 parts of toughening agent and stir to obtain the precursor slurry.

[0045] (4) Pour 1 / 2 volume of the precursor slurry into the mold. Place the alkali - resistant fiber mesh on the surface of the precursor slurry and then perform initial pressing. After the initial pressing is completed, pour the remaining precursor slurry into the mold for final pressing to obtain the inorganic artificial stone rough board. Among them, the initial pressing pressure is 5 - 10 MPa, and the final pressing pressure is 15 - 20 MPa to form a mechanical interlock between the alkali - resistant fiber mesh cloth and the precursor slurry. Among them, the mesh aperture of the alkali - resistant fiber mesh cloth is 5 mm and the wire diameter is 0.3 mm.

[0046] (5) Cure the rough board, and after curing, perform thickness - fixing grinding and polishing to obtain the inorganic artificial stone. Among them, the curing and thickness - fixing grinding and polishing refer to the existing technology.

[0047] Example 2

[0048] This example provides a preparation method of high - flexural - strength inorganic artificial stone. The difference between this example and Example 1 is that: in step (3), the toughening agent is 5 parts. Other steps are the same.

[0049] Example 3

[0050] This example provides a preparation method of high - flexural - strength inorganic artificial stone. The difference between this example and Example 1 is that: in step (3), the toughening agent is 1 part. Other steps are the same.

[0051] Example 4

[0052] This example provides a preparation method of high - flexural - strength inorganic artificial stone. The difference between this example and Example 2 is that: in step (4), a glass fiber mesh cloth is used to replace the alkali - resistant fiber mesh cloth, and the mesh aperture of the mesh cloth is 2 mm and the wire diameter is 0.3 mm. Other steps are the same.

[0053] Example 5

[0054] This example provides a preparation method of high - flexural - strength inorganic artificial stone. The difference between this example and Example 2 is that: in step (4), the mesh aperture of the alkali - resistant fiber mesh cloth is 5 mm and the wire diameter is 0.5 mm. Other steps are the same.

[0055] Example 6

[0056] This example provides a preparation method of high - flexural - strength inorganic artificial stone. The difference between this example and Example 2 is that: in step (4), a stainless - steel wire mesh cloth is used to replace the alkali - resistant fiber mesh cloth, and the mesh aperture of the mesh cloth is 5 mm and the wire diameter is 0.8 mm. Other steps are the same.

[0057] Example 7

[0058] This example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this example and Example 1 is that in step (4), stainless steel wire mesh is selected to replace the alkali-resistant fiber mesh cloth, and the mesh aperture of the mesh cloth is 5 mm and the wire diameter is 0.8 mm. Other steps are the same.

[0059] Example 8

[0060] This example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this example and Example 2 is that in step (4), glass fiber mesh cloth is selected to replace the alkali-resistant fiber mesh cloth. Other steps are the same.

[0061] Example 9

[0062] This example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this example and Example 2 is that in step (4), stainless steel wire mesh is selected to replace the alkali-resistant fiber mesh cloth. Other steps are the same.

[0063] Comparative Example 1

[0064] This comparative example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this comparative example and Example 2 is that in step (4), the alkali-resistant fiber mesh cloth is removed.

[0065] Comparative Example 2

[0066] This comparative example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this comparative example and Example 2 is that in step (4), the alkali-resistant fiber mesh cloth is set at 1 / 6 of the thickness of the inorganic artificial stone slab.

[0067] Comparative Example 3

[0068] This comparative example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this comparative example and Example 2 is that in step (3), the toughening agent is not added. Other steps are the same.

[0069] Comparative Example 4

[0070] This comparative example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this comparative example and Example 2 is that in step (3), the amount of the toughening agent is 12 parts. Other steps are the same.

[0071] Comparative Example 5

[0072] This comparative example provides a preparation method of high flexural strength inorganic artificial stone. The difference between this comparative example and Example 2 is that in step (4), glass fiber mesh cloth is selected to replace the alkali-resistant fiber mesh cloth, and the mesh aperture of the mesh cloth is 10 mm and the wire diameter is 0.3 mm. Other steps are the same.

[0073] Comparative Example 6

[0074] This comparative example provides a method for preparing a high flexural strength inorganic artificial stone. The difference between this comparative example and Example 4 is that in step (4), the mesh aperture of the fiberglass mesh cloth is 2 mm and the wire diameter is 0.2 mm. Other steps are the same.

[0075] Comparative Example 7

[0076] This comparative example provides a method for preparing a high flexural strength inorganic artificial stone. The difference between this comparative example and Example 1 is that in step (4), the mesh aperture of the fiberglass mesh cloth is 10 mm and the wire diameter is 0.2 mm. Other steps are the same.

[0077] Table 1

[0078]

[0079]

[0080] Referring to Table 1, the above examples and comparative examples are analyzed as follows:

[0081] Comparing Examples 1 to 3, it can be seen that when the same mesh cloth is used, as the dosage of the toughening agent increases, both the compressive strength and flexural strength of the inorganic artificial stone increase. The reason is that the increase in the toughening agent enhances the toughness of the inorganic artificial stone to a certain extent, and at the same time, an appropriate amount of toughening agent can adjust the fluidity of the precursor slurry, which is beneficial to the formation of a mechanical bite between the mesh cloth and the precursor slurry to form a three-dimensional continuous skeleton structure, thereby improving the compressive strength and flexural strength of the inorganic artificial stone.

[0082] Specifically, the principle of the formation of a continuous skeleton structure between the mesh cloth and the precursor slurry is that the mesh cloth forms a rigid support surface in the initial hydration layer of the precursor slurry. Subsequently, the upper-layer precursor slurry undergoing hydration will pull the mesh cloth fibers under the action of shrinkage stress to form a micro-arch structure. This stress-induced deformation can cause a three-dimensional undulation with an amplitude of 0.5 - 2 mm in the two-dimensional mesh. In addition, ettringite crystals (C-S-H) generated by the hydration reaction will grow in a dendritic shape on the surface of the mesh cloth. These nanowhiskers with a diameter of about 200 nm expand in a three-dimensional radial manner, effectively filling the transition zone between the mesh cloth and the uncured precursor slurry, and converting the planar distributed mesh nodes into rigid fulcrums connected in space, thereby forming a three-dimensional continuous skeleton structure between the mesh cloth and the precursor slurry.

[0083] Comparing Example 3 and Example 5, it can be seen that when the dosage of the toughening agent is the same, the mesh cloth materials used are both alkali-resistant fiber mesh cloths, and the mesh aperture of the mesh cloth is 5 mm. Increasing the wire diameter of the mesh cloth can improve the compressive strength and flexural strength of the inorganic artificial stone.

[0084] Comparing Example 4 and Comparative Example 5, it can be seen that when the dosage of the toughening agent is the same, the material of the fiberglass mesh cloth used is the same, the wire diameter of the mesh cloth is the same, and selecting a smaller mesh aperture can improve the compressive strength and flexural strength of the inorganic artificial stone. Moreover, when the mesh aperture is too large (greater than 5 mm), the stress dispersion effect is poor, resulting in a decrease in the flexural performance of the inorganic artificial stone.

[0085] Comparing Example 2, Example 8 and Example 9, it can be seen that for the inorganic artificial stones prepared by using three kinds of mesh cloths, namely alkali-resistant fiber mesh cloth, fiberglass mesh cloth and stainless steel wire mesh cloth, their compressive strengths are similar, but the stainless steel wire mesh cloth has obvious advantages in flexural strength. The stainless steel wire mesh cloth can largely delay the brittle fracture of the plate and improve the working performance of the plate.

[0086] Comparing Example 9 with Example 6 and Example 7, it can be seen that increasing the wire diameter of the stainless steel wire mesh cloth can significantly improve the flexural strength of the inorganic artificial stone. The reason is that increasing the wire diameter of the stainless steel wire mesh cloth can improve the mechanical bite force formed between the stainless steel wire mesh cloth and the precursor slurry, which is conducive to the formation of an overall three-dimensional continuous skeleton structure between the stainless steel wire mesh cloth and the precursor slurry, thereby significantly improving the flexural strength of the inorganic artificial stone.

[0087] As the best example, when using a stainless steel wire mesh cloth with a mesh aperture of 5 mm and a wire diameter of 0.8 mm, and adding 10 parts of toughening agent, the flexural strength of the inorganic artificial stone is the highest, reaching 25.6 MPa. At this time, the cooperation effect of the toughening agent and the stainless steel wire mesh cloth is the best.

[0088] Comparing Example 2 and Comparative Example 1, it can be seen that when no mesh cloth is set inside the inorganic artificial stone, the flexural strength of the inorganic artificial stone decreases significantly, indicating that the mesh cloth can improve the flexural strength of the inorganic artificial stone with mesh cloth.

[0089] Comparing Example 2 and Comparative Example 2, it can be seen that when the alkali-resistant fiber mesh cloth is set at 1 / 6 of the thickness of the inorganic artificial stone slab, that is, the mesh cloth is set far from 1 / 3 - 1 / 2 of the thickness of the inorganic artificial stone slab. During the flexural test of the slab, the bottom of the slab has cracked and failed before the mesh cloth can participate in the flexural action of the slab in time. Therefore, setting the mesh cloth at 1 / 3 - 1 / 2 of the thickness of the inorganic artificial stone slab is beneficial to improving the flexural and compressive properties of the inorganic artificial stone slab.

[0090] Comparing Example 2 and Comparative Example 3, it can be seen that without adding a toughening agent, it significantly affects the flexural and compressive strengths of the inorganic artificial stone.

[0091] Comparing Example 2 and Comparative Example 4, it can be seen that excessive use of the toughening agent (more than 10 parts) affects the flexural strength of the inorganic artificial stone. The reason is that using an excessive amount of toughening agent leads to a decrease in the fluidity of the precursor slurry, resulting in uneven distribution of the mesh cloth.

[0092] Comparing Example 4 and Comparative Example 6, it can be seen that when the wire diameter of the fiberglass mesh is too thin (less than 0.3 mm), the tensile strength of the fiberglass mesh is insufficient, the bonding strength with the precursor slurry is weak, and the flexural and compressive properties of the inorganic artificial stone slab are weakened.

[0093] Comparing Example 1 and Comparative Example 7, it can be seen that even when the dosage of the toughening agent is relatively large, if the pore size of the fiberglass mesh is too large and the wire diameter is too thin, it will also significantly affect the flexural and compressive properties of the inorganic artificial stone slab.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A highly flexural-resistant inorganic artificial stone, characterized in that: It comprises an inorganic artificial stone board and at least one layer of mesh structure embedded in the inorganic artificial stone board, wherein the mesh structure is formed integrally with the inorganic artificial stone board when the precursor slurry of the inorganic artificial stone board is hydrated; The mesh structure is laid flat and perpendicular to the thickness direction of the inorganic artificial stone slab; The mesh structure is located in the middle section of the thickness of the inorganic artificial stone slab.

2. The highly flexural-resistant inorganic artificial stone according to claim 1, characterized in that: The area of ​​the mesh structure is not less than the cross section of the inorganic artificial stone slab perpendicular to the thickness direction; The tensile strength of the mesh structure is ≥500MPa; The mesh hole diameter of the mesh structure is ≤5mm, and the wire diameter is 0.3mm≤≤1mm.

3. The highly flexural-resistant inorganic artificial stone according to claim 2, characterized in that: The mesh structure is selected from at least one of a fiber mesh and a stainless steel mesh; and an inorganic artificial stone board contains one or more layers of the mesh structure. When an inorganic artificial stone board is provided with multiple layers of mesh structures, the multiple layers of the mesh structures are arranged at intervals in the inorganic artificial stone board.

4. The highly flexural-resistant inorganic artificial stone according to claim 1, characterized in that: The inorganic artificial stone slab is obtained by pouring and curing a precursor slurry in a mold, wherein the precursor slurry comprises a solid material and a liquid material; The solid materials include, by weight: 55-65 parts of aggregate, 20-30 parts of cement, 5-10 parts of powder and 0.5-1 part of inorganic pigment; The liquid material includes, by weight: 1-10 parts of toughening agent, 1-2 parts of water reducing agent, and 1-2 parts of water.

5. The highly flexural-resistant inorganic artificial stone according to claim 4, characterized in that: The aggregate is selected from quartz sand or calcium sand; The particle size range of the powder is 320-330 meshes, and the powder is at least one of silicon powder, calcium powder and metakaolin.

6. The highly flexural-resistant inorganic artificial stone according to claim 4, characterized in that: The toughening agent is styrene-butadiene emulsion or styrene-acrylic emulsion.

7. A method for preparing the highly flexural-resistant inorganic artificial stone according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, preparing a precursor slurry of an inorganic artificial stone slab; S2, pour 1 / 3-1 / 2 volume of the precursor slurry into the mold, lay the mesh structure on the surface of the precursor slurry in the mold, after initial pressing, pour the remaining precursor slurry into the mold for final pressing to obtain an inorganic artificial stone rough board; S3, curing and trimming the inorganic artificial stone rough board to obtain the inorganic artificial stone.

8. The method for preparing the highly flexural-resistant inorganic artificial stone according to claim 7, characterized in that: In S2, the initial pressure is 5-10MPa and the final pressure is 15-20MPa.

9. The method for preparing the highly flexural-resistant inorganic artificial stone according to claim 7, characterized in that: In S2, if the mesh structure is multi-layered, the volume of the precursor slurry poured into the mold before and after each mesh structure is laid is determined according to the preset spacing of the mesh structures, and initial pressing is performed after each mesh structure is laid on the surface of the precursor slurry; After all the precursor slurry is poured into the mold, final pressing is performed.

10. The method for preparing the highly flexural-resistant inorganic artificial stone according to claim 7, characterized in that: In S1, the preparation of the precursor slurry comprises the following steps: S11, mixing the aggregate and the inorganic pigment to obtain a mixture A; S12, adding cement and powder to mixture A, and mixing to obtain mixture B; S13, adding a mixed solution of water and a water reducing agent while stirring the mixture B, mixing well, then adding a toughening agent, stirring and mixing well to obtain a precursor slurry.

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