Large-area crack-free anti-cracking millstone structure and construction method thereof

Abstract

The invention discloses a large-area crack-free anti-cracking millstone structure and a construction method thereof, and relates to the field of millstones, the large-area crack-free anti-cracking millstone structure comprises a base layer which is arranged at the bottommost part as a construction foundation, and a bottom coating which is arranged above the base layer; the anti-crack net layer is arranged above the bottom coating layer; the anti-crack structure layer is arranged above the anti-crack net layer; the grouting reinforcing layer is arranged in the anti-crack structure layer; according to the large-area crack-free anti-cracking millstone structure and the construction method thereof, the foundation building and the ground serve as the basis, a secondary structure leveling layer does not need to be poured, and a flexible anti-cracking isolation layer is effectively formed through flexible resin bottoming and anti-cracking net laying; flexible resin and decorative aggregate with a low crushing value are mixed and paved to form a high-strength integral millstone frame anti-crack layer; according to the terrazzo structure disclosed by the invention, the whole terrazzo structure with high fracture resistance and high pressure resistance is formed by integrally pouring the inorganic grouting material with high pressure resistance and high fracture resistance, so that the problems of hollowing and cracking of the terrazzo terrace can be effectively avoided, and the quality and reliability of the terrazzo terrace are improved.

Description

Technical Field

[0001] This invention relates to terrazzo technology, specifically to a large-area, seamless, crack-resistant terrazzo structure and its construction method. Background Technology

[0002] Terrazzo flooring is a new type of flooring that imitates the construction of terrazzo flooring. It possesses all the excellent properties of epoxy resin flooring and can achieve integrated wall and floor design.

[0003] While existing terrazzo technologies offer a variety of aesthetically pleasing styles, they still have some drawbacks. The biggest risk and most frequent quality issue with terrazzo is hollowing and cracking. This is especially true in recent years with the rise of fourth-generation buildings. Terrazzo flooring has experienced considerable challenges in its application to garages in these buildings: the flatness of the original floor structure is difficult to achieve with a 2-meter straightedge of less than 10mm, leading to a dilemma in surface layer selection. On the one hand, choosing epoxy terrazzo and filling the gaps with epoxy resin before applying the epoxy terrazzo surface layer results in excessively high costs. On the other hand, choosing traditional terrazzo products results in smaller gaps and cannot avoid the problem of hollowing and cracking. Even if a secondary leveling layer is applied before applying various terrazzo surface layers, the risk of hollowing and cracking remains. Therefore, a large-area, seamless, crack-resistant terrazzo structure and its construction method are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a large-area seamless terrazzo structure and its construction method to solve the problems in the prior art, such as the excessively high cost of using epoxy resin to fill the gaps before applying the epoxy terrazzo surface layer, the small spacing of traditional terrazzo products and the inability to avoid hollow cracking, and the inability to avoid the risk of hollow cracking even when a secondary leveling layer is applied before applying various terrazzo surface layers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a large-area seamless, crack-resistant terrazzo structure and its construction method, comprising:

[0006] The base layer, set at the bottom as the structural foundation, is the bottom concrete layer, or can be replaced by a floor or ground.

[0007] The base coat is applied above the substrate.

[0008] A crack-resistant mesh layer is applied above the base coating layer;

[0009] A crack-resistant structural layer is placed above the crack-resistant mesh layer;

[0010] The grouting reinforcement layer is installed inside the crack-resistant structural layer.

[0011] Furthermore, the materials used to prepare the base coating, the crack-resistant mesh layer, and the crack-resistant structural layer all include epoxy resin, polyurethane resin, and polyurea resin.

[0012] Furthermore, the anti-crack mesh layer is also provided with a grinding stone-specific anti-crack mesh with a tensile strength greater than 2MPa. The anti-crack mesh layer is bonded to the base coating layer by the grinding stone-specific anti-crack mesh. The selection of this range of pull-out strength and elongation at break ensures that the anti-crack mesh layer has sufficient strength to resist breakage when subjected to a certain external force, and also has good ductility to disperse stress and avoid stress concentration leading to cracking. The high bonding tensile strength ensures that the anti-crack mesh is firmly bonded to the base coating layer, preventing the anti-crack effect from being affected by the two separating.

[0013] Furthermore, the epoxy resin, polyurethane resin, and polyurea resin used in the crack-resistant mesh layer have a pull-out strength greater than 15 MPa and an elongation at break greater than 15%.

[0014] Furthermore, the epoxy resin, polyurethane resin, and polyurea resin used in the crack-resistant structural layer have a pull-out strength greater than 20 MPa and an elongation at break greater than 20%.

[0015] Furthermore, the crack-resistant structural layer is provided with washed and dried crushed stone with a crushing value of less than 4%, and the thickness of the crack-resistant structural layer is 20mm. This setting of tensile strength and elongation at break ensures that the crack-resistant structural layer can still maintain its structural integrity and effectively resist cracking when subjected to large external forces. When mixed with washed and dried crushed stone with a low crushing value, it can form a porous and continuously bonded high-strength integral millstone frame crack-resistant layer, further enhancing the crack resistance performance.

[0016] Furthermore, the grouting reinforcement layer uses inorganic grout, which has a flexural strength of not less than 8 MPa and a compressive strength of not less than 50 MPa. The grouting reinforcement layer is used to fill and compact the crack-resistant structural layer. The high flexural and compressive strengths ensure that the grouting reinforcement layer will not easily break or crush when subjected to various external forces, thereby providing solid support for the entire terrazzo structure and enhancing the stability and crack resistance of the overall structure.

[0017] A construction method for a large-area, seamless, crack-resistant terrazzo structure includes the following steps:

[0018] Step 1: Grind the base layer to ensure that the surface is flat. The flatness error should be controlled within 5mm with a two-meter straightedge to reduce the impact of uneven base layer on subsequent construction and the quality of the terrazzo structure.

[0019] Step 2: Apply a primer coating evenly to the base surface, with the coating thickness controlled at 0.2-0.5mm, to allow it to fully penetrate and bridge the base layer, thereby enhancing the adhesion between the base layer and the upper structure;

[0020] Step 3: Adhere the anti-crack mesh layer to the surface of the primer layer. Use a special adhesive during adhesion to ensure that the anti-crack mesh layer is flat and firmly bonded to the primer layer without any hollow or lifting phenomena.

[0021] Step 4: Mix the selected epoxy resin, polyurethane resin or polyurea resin with water-washed and dried crushed stone with a crushing value of less than 4% in a certain proportion. After mixing evenly, spread it on the top of the crack-resistant mesh layer to form a 20mm thick crack-resistant structural layer. Use tools such as scrapers to smooth the surface during the spreading process.

[0022] Step 5: Use high flexural strength and high compressive strength inorganic grout to fill and compact the crack-resistant structural layer. When grouting, start from one end of the crack-resistant structural layer and slowly and evenly grout to ensure that the grout fills the internal voids of the crack-resistant structural layer.

[0023] Step 6: Use a heavy-duty grinder with grinding discs of different grit sizes to grind from low grit to high grit, up to 150 grit. Clean the surface debris after each grinding.

[0024] Step 7: Perform two grinding stone filling operations. The first time, use colored grinding stone resin mixed with special filling powder to knead and fill the holes. When filling the holes, make sure to fill them completely and compact them to ensure that they are flat with the surrounding grinding stone surface. The second time, use transparent grinding stone resin mixed with special filling powder to knead and fill the holes to further fill the tiny holes and make the surface smoother.

[0025] Step 8: Use a heavy-duty grinder with 300-grit grinding discs to grind the surface of the grinding stone in both directions to make it more uniform and smooth.

[0026] Step 9: Apply lithium-based hardener for hardener penetration at least twice. After each penetration, keep the surface moist for a certain period of time to enhance the hardness and wear resistance of the grinding stone surface.

[0027] Step 10: Use a heavy-duty grinder with 500-6000 grit grinding pads again to grind the terrazzo floor in both directions to ensure it shines and achieves the desired decorative effect.

[0028] Step 11: Polish with a special polishing material to further ensure the floor is stain-resistant and smooth, and improve the performance and aesthetics of the terrazzo floor;

[0029] Step 12: After completing all the terrazzo construction work, to avoid cross-contamination, use a special protective pad to fully cover the finished product and protect it. The protective pad should be flat and firmly covering the terrazzo surface.

[0030] Compared with existing technologies, this invention provides a large-area seamless, crack-resistant terrazzo structure and its construction method. Based on the foundation floor and ground, this invention eliminates the need for a secondary structural leveling layer. Through a series of measures including grinding the original ground surface, applying a base coat, a crack-resistant mesh layer, a crack-resistant structural layer, and a grouting reinforcement layer, a flexible resin base coat and crack-resistant mesh are laid to effectively form a flexible crack-resistant isolation layer. Flexible resin and low-compression-value decorative aggregate are mixed and spread to form a porous, continuously bonded, high-strength, integral terrazzo frame crack-resistant layer. High-compressive-strength, high-flexural-strength inorganic grout is used for integral injection, ultimately forming a high-flexural-strength, high-compressive-strength terrazzo structure. This integral structure effectively avoids the hollow cracking problems caused by various factors in traditional terrazzo flooring, improving the quality and reliability of terrazzo flooring.

[0031] This invention relies on the foundation building and ground surface, eliminating the need for a secondary structural leveling layer. Through a series of unique construction techniques and structural designs, it effectively solves the problem of hollow cracking in terrazzo flooring. Specifically, this invention involves grinding the original ground surface, setting up a base coating, a crack-resistant mesh layer, a crack-resistant structural layer, and a grouting reinforcement layer. A flexible resin base is applied, and the crack-resistant mesh is laid to form a flexible crack-resistant isolation layer. Flexible resin and low-compression-value decorative aggregate are mixed and spread to construct a porous, continuously bonded, high-strength, integral terrazzo frame crack-resistant layer. Then, high-compressive-strength, high-flexural-strength inorganic grout is used for overall injection, ultimately forming a high-flexural-strength, high-compressive-strength terrazzo structure. After subsequent grinding and polishing processes, a terrazzo floor with strong decorative appeal, seamless construction, and strong crack resistance is obtained. This provides reliable technical support for the application of terrazzo flooring in various projects, including fourth-generation buildings, overcoming many shortcomings of existing technologies and demonstrating significant innovation and practicality. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0033] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Base layer; 2. Primer layer; 3. Crack-resistant mesh layer; 4. Crack-resistant structural layer; 5. Grouting reinforcement layer. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] As attached Figure 1 As shown:

[0038] This invention provides a large-area, seamless, crack-resistant terrazzo structure and its construction method, comprising:

[0039] Base layer 1, serving as the structural foundation of the entire terrazzo structure, is typically the bottom concrete layer, but can also be replaced by a floor or ground surface. Its function is to provide stable support for the upper structure, bear the load of the upper structure, and transfer the load to the foundation. The flatness of base layer 1 is crucial to subsequent construction and the quality of the terrazzo structure. Before construction, base layer 1 is ground to control the flatness error within 5mm using a two-meter straightedge. This reduces stress concentration caused by unevenness in base layer 1 and prevents cracking caused by uneven stress on the upper structure due to undulations in base layer 1, thus providing a flat and solid foundation for the entire terrazzo structure.

[0040] The primer layer 2 is applied above the base layer 1, and its preparation materials include epoxy resin, polyurethane resin, and polyurea resin. The primer layer 2 is uniformly applied to the surface of the base layer 1, and the coating thickness is controlled between 0.2-0.5 mm. The primer layer 2 has multiple functions: on the one hand, it can fully penetrate the base layer 1, fill the tiny pores and cracks on the surface of the base layer 1, and enhance the density of the base layer 1; on the other hand, through chemical bonding with the base layer 1, it forms a good bridge, significantly enhancing the adhesion between the base layer 1 and the upper structure, making the entire structure a tight whole, and effectively preventing delamination and cracking caused by weak bonding between layers.

[0041] The crack-resistant mesh layer 3 is placed on top of the base layer 2. Its preparation material also includes epoxy resin, polyurethane resin and polyurea resin, and it is also provided with a grinding stone-specific crack-resistant mesh with a tensile strength greater than 2MPa. The crack-resistant mesh layer 3 is bonded to the base layer 2 by the grinding stone-specific crack-resistant mesh, and a special adhesive is used to ensure that the bonding is firm, flat and without hollow or lifting phenomena.

[0042] Specifically, the anti-crack mesh in the anti-crack mesh layer 3 has high tensile strength and good elongation at break; when the terrazzo structure is subjected to external force, the anti-crack mesh can withstand a certain tensile force and is not easily broken; at the same time, its good ductility can disperse stress, dispersing concentrated stress over a larger area, avoiding stress concentration that leads to local cracking; the high bonding tensile strength ensures that the anti-crack mesh is firmly bonded to the base layer 2, preventing the anti-crack effect from being affected by the separation of the two, thus forming a flexible anti-crack isolation layer between the base layer 2 and the anti-crack structural layer 4, effectively preventing cracks from extending to the upper structure;

[0043] Specifically, the epoxy resin, polyurethane resin and polyurea resin used in the crack-resistant mesh layer 3 have specific performance requirements, with a pull-out strength greater than 15MPa and an elongation at break greater than 15%. This type of resin can be well bonded with the special crack-resistant mesh for grinding stone, further enhancing the overall performance of the crack-resistant mesh layer 3 and providing reliable support and crack resistance for the upper structure.

[0044] The crack-resistant structural layer 4 is set above the crack-resistant mesh layer 3. The materials used to prepare it include epoxy resin, polyurethane resin and polyurea resin, and the tensile strength is greater than 20MPa and the elongation at break is greater than 20%. Washed and dried crushed stone with a mixing and crushing value of less than 4% is set on the crack-resistant structural layer 4, with a thickness of 20mm.

[0045] Specifically, the flexible resin in the crack-resistant structural layer 4 is mixed with water-washed and dried crushed stone with low crushing value in a certain proportion and then spread to form a porous and continuously bonded high-strength integral terrazzo frame crack-resistant layer. The flexible resin has good flexibility and adhesion, which can fill the gaps between the crushed stones and firmly bond them together to form an integral structure. The low crushing value of the crushed stone ensures that it has high strength and stability and can withstand greater external forces. The porous structure not only reduces the weight of the structural layer, but also provides space for the grouting reinforcement layer 5, enhancing the interlocking force and integrity between the layers.

[0046] The high tensile strength and elongation at break allow the crack-resistant structural layer 4 to maintain structural integrity and effectively resist cracking when subjected to large external forces. When external forces are applied to the terrazzo structure, the crack-resistant structural layer 4 can transfer the external forces to other parts through its own deformation and stress dispersion, avoiding excessive local stress that could lead to cracking, and providing important crack-resistant support for the entire terrazzo structure.

[0047] The grouting reinforcement layer 5 is set inside the crack-resistant structural layer 4 and uses inorganic grout with a flexural strength of not less than 8MPa and a compressive strength of not less than 50MPa. High flexural strength and high compressive strength inorganic grout is used to fill and compact the crack-resistant structural layer 4. When grouting, start from one end of the crack-resistant structural layer 4 and slowly and evenly grout to ensure that the grout fills the internal voids of the crack-resistant structural layer 4.

[0048] Specifically, the function of the grouting reinforcement layer 5 is to reinforce and strengthen the entire terrazzo structure; its high flexural and compressive strength ensures that the grouting reinforcement layer 5 will not easily break or crush when subjected to various external forces; the grout fills the porous structure of the crack-resistant structural layer 4, forming a tighter connection between the layers and enhancing the stability and crack resistance of the overall structure; it can effectively transfer and disperse the stress in the crack-resistant structural layer 4, further improving the terrazzo structure's ability to resist external forces and providing solid support for the entire terrazzo structure;

[0049] Through the above technical solution, this invention uses the foundation building and ground as a base, eliminating the need for a secondary structural leveling layer. By grinding the original ground, applying a base coating 2, a crack-resistant mesh layer 3, a crack-resistant structural layer 4, and a grouting reinforcement layer 5, a flexible resin base and crack-resistant mesh are laid to effectively form a flexible crack-resistant isolation layer. Flexible resin and low-compression-value decorative aggregate are mixed and spread to form a porous, continuously bonded, high-strength, integral terrazzo frame crack-resistant layer. High-compressive-strength, high-flexural-strength inorganic grout is used for overall injection, ultimately forming a high-flexural-strength, high-compressive-strength terrazzo structure. This integral structure effectively avoids the hollow cracking problems caused by various reasons in traditional terrazzo flooring, improving the quality and reliability of terrazzo flooring.

[0050] This invention relies on the foundation building and ground surface, eliminating the need for a secondary structural leveling layer. Through a series of unique construction techniques and structural designs, it effectively solves the problem of hollow cracking in terrazzo flooring. Specifically, this invention involves grinding the original ground surface and setting up a base coating layer 2, a crack-resistant mesh layer 3, a crack-resistant structural layer 4, and a grouting reinforcement layer 5. A flexible resin base layer is applied, and the crack-resistant mesh is laid to form a flexible crack-resistant isolation layer. Flexible resin and low-compression-value decorative aggregate are mixed and spread to construct a porous, continuously bonded, high-strength, integral terrazzo frame crack-resistant layer. Then, high-compressive-strength, high-flexural-strength inorganic grout is used for overall injection, ultimately forming a high-flexural-strength, high-compressive-strength terrazzo structure. After subsequent grinding and polishing processes, a terrazzo floor with strong decorative appeal, seamless construction, and strong crack resistance is obtained. This provides reliable technical support for the application of terrazzo flooring in various projects, including fourth-generation buildings, overcoming many shortcomings of existing technologies and demonstrating significant innovation and practicality.

[0051] A construction method for a large-area, seamless, crack-resistant terrazzo structure includes the following steps:

[0052] Step 1: Grind the base layer 1 to ensure that the surface of the base layer 1 is flat. The flatness error should be controlled within 5mm with a two-meter straightedge to reduce the impact of uneven base layer 1 on subsequent construction and the quality of the terrazzo structure.

[0053] Step 2: Apply primer 2 evenly to the surface of base layer 1, with the coating thickness controlled at 0.2-0.5mm, so that it can fully penetrate and bridge base layer 1, and enhance the adhesion between base layer 1 and the upper structure;

[0054] Step 3: Adhere the anti-crack mesh layer 3 to the surface of the base coating 2. Use a special adhesive during adhesion to ensure that the anti-crack mesh layer 3 is flat and firmly bonded to the base coating 2, without any hollow or lifting phenomena.

[0055] Step 4: Mix the selected epoxy resin, polyurethane resin or polyurea resin with water-washed and dried crushed stone with a crushing value of less than 4% in a certain proportion. After mixing evenly, spread it on the top of the crack-resistant mesh layer 3 to form a 20mm thick crack-resistant structural layer 4. Use scrapers and other tools to smooth the surface during the spreading process.

[0056] Step 5: Use high flexural strength and high compressive strength inorganic grout to fill and compact the crack-resistant structural layer 4. When filling, start from one end of the crack-resistant structural layer 4 and fill slowly and evenly to ensure that the grout fills the internal voids of the crack-resistant structural layer 4.

[0057] Step 6: Use a heavy-duty grinder with grinding discs of different grit sizes to grind from low grit to high grit, up to 150 grit. Clean the surface debris after each grinding.

[0058] Step 7: Perform two grinding stone filling operations. The first time, use colored grinding stone resin mixed with special filling powder to knead and fill the holes. When filling the holes, make sure to fill them completely and compact them to ensure that they are flat with the surrounding grinding stone surface. The second time, use transparent grinding stone resin mixed with special filling powder to knead and fill the holes to further fill the tiny holes and make the surface smoother.

[0059] Step 8: Use a heavy-duty grinder with 300-grit grinding discs to grind the surface of the grinding stone in both directions to make it more uniform and smooth.

[0060] Step 9: Apply lithium-based hardener for hardener penetration at least twice. After each penetration, keep the surface moist for a certain period of time to enhance the hardness and wear resistance of the grinding stone surface.

[0061] Step 10: Use a heavy-duty grinder with 500-6000 grit grinding pads again to grind the terrazzo floor in both directions to ensure it shines and achieves the desired decorative effect.

[0062] Step 11: Polish with a special polishing material to further ensure the floor is stain-resistant and smooth, and improve the performance and aesthetics of the terrazzo floor;

[0063] Step 12: After completing all the terrazzo construction work, in order to avoid cross-contamination, use a special protective pad to fully cover the finished product and protect it. The protective pad should be flat and firmly covering the terrazzo surface.

[0064] Through the above-mentioned technical solution, the construction method of the present invention further ensures the crack resistance of the terrazzo structure through a series of steps. During the construction process, the process parameters are strictly controlled for the grinding of the base layer 1, the uniform application of the base coating 2, the smooth bonding of the crack-resistant mesh layer 3, the mixing and spreading of the crack-resistant structural layer 4, and the grouting and compaction of the grouting reinforcement layer 5, so as to ensure that the bonding between each layer is tight and the performance is stable.

[0065] The subsequent grinding and polishing processes not only enable terrazzo floors to achieve the ideal decorative effect, but also further eliminate minor surface defects and stress concentration points, improving the flatness and smoothness of the floor. The use of lithium-based curing agents for penetration treatment enhances the hardness and wear resistance of the terrazzo surface, reducing the risk of cracking caused by surface wear. The final finished product protection measures prevent cross-contamination and damage to the terrazzo floor from external factors, ensuring the long-term stability and crack resistance of the terrazzo structure.

[0066] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A large-area, seamless, crack-resistant terrazzo structure, characterized in that, include: The base layer (1) is set at the bottom as the structural foundation; The base coating (2) is applied above the base layer (1); The crack-resistant mesh layer (3) is set above the base coating layer (2); A crack-resistant structural layer (4) is placed above the crack-resistant mesh layer (3); The grouting reinforcement layer (5) is set inside the crack-resistant structural layer (4).

2. The large-area seamless anti-cracking terrazzo structure according to claim 1, characterized in that, The materials used to prepare the base coating (2), the crack-resistant mesh layer (3), and the crack-resistant structural layer (4) all include epoxy resin, polyurethane resin, and polyurea resin.

3. The terrazzo structure with large-area seamless anti-cracking properties according to claim 2, characterized in that, The anti-crack mesh layer (3) is also provided with a grinding stone-specific anti-crack mesh with a tensile strength greater than 2MPa. The anti-crack mesh layer (3) is bonded to the base layer (2) by the grinding stone-specific anti-crack mesh.

4. A large-area seamless anti-cracking terrazzo structure according to claim 2, characterized in that, The anti-crack mesh layer (3) uses epoxy resin, polyurethane resin and polyurea resin with a pull-out strength greater than 15 MPa and an elongation at break greater than 15%.

5. A large-area seamless anti-cracking terrazzo structure according to claim 2, characterized in that, The crack-resistant structural layer (4) uses epoxy resin, polyurethane resin and polyurea resin with a pull-out strength greater than 20 MPa and an elongation at break greater than 20%.

6. A large-area seamless anti-cracking terrazzo structure according to claim 2, characterized in that, The crack-resistant structural layer (4) is provided with water-washed and dried crushed stone with a mixing and crushing value of less than 4%, and the thickness of the crack-resistant structural layer (4) is 20 mm.

7. A large-area seamless anti-cracking terrazzo structure according to claim 2, characterized in that, The grouting reinforcement layer (5) is made of inorganic grouting material. The flexural strength of the inorganic grouting material is not less than 8 MPa and the compressive strength is not less than 50 MPa. The grouting reinforcement layer (5) is used to fill and compact the crack-resistant structural layer (4).

8. A construction method for a large-area seamless, crack-resistant terrazzo structure according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Grind the base layer (1) to ensure that the surface of the base layer (1) is flat and the flatness error is controlled within 5mm with a two-meter straightedge; Step 2: Apply a base coat (2) evenly to the surface of the base layer (1), with the coating thickness controlled at 0.2-0.5 mm, so that it can fully penetrate and bridge the base layer (1) and enhance the adhesion between the base layer (1) and the upper structure; Step 3: Adhere the anti-crack mesh layer (3) to the surface of the base coating (2). Use a special adhesive to ensure that the anti-crack mesh layer (3) is flat and firmly bonded to the base coating (2) without any hollow or lifting phenomena. Step 4: Mix the selected epoxy resin, polyurethane resin or polyurea resin with water-washed and dried crushed stone with a crushing value of less than 4% in a certain proportion. After mixing evenly, spread it on the top of the crack-resistant mesh layer (3) to form a 20mm thick crack-resistant structural layer (4). Use tools such as scrapers to smooth the surface during the spreading process. Step 5: Use high flexural strength and high compressive strength inorganic grout to fill and compact the crack-resistant structural layer (4). When grouting, start from one end of the crack-resistant structural layer (4) and slowly and evenly grout to ensure that the grout fills the internal voids of the crack-resistant structural layer (4). Step 6: Use a heavy-duty grinder with grinding discs of different grit sizes to grind from low grit to high grit, up to 150 grit. Clean the surface debris after each grinding. Step 7: Perform two grinding stone filling operations. The first time, use colored grinding stone resin mixed with special filling powder to knead and fill the holes. When filling the holes, make sure to fill them completely and compact them to ensure that they are flat with the surrounding grinding stone surface. The second time, use transparent grinding stone resin mixed with special filling powder to knead and fill the holes to further fill the tiny holes and make the surface smoother. Step 8: Use a heavy-duty grinder with 300-grit grinding discs to grind the surface of the grinding stone in both directions to make it more uniform and smooth. Step 9: Apply lithium-based curing agent for penetration at least twice, keeping the surface moist for a certain period of time after each penetration; Step 10: Use a heavy-duty grinder with 500-6000 grit grinding pads again to grind the surface in both directions to ensure it is shiny; Step 11: Polish with a special polishing material to further ensure the floor is stain-resistant and smooth; Step 12: After completing all the terrazzo construction work, to avoid cross-contamination, use a special protective pad to fully cover the finished product and protect it. The protective pad should be flat and firmly covering the terrazzo surface.

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