Construction method of rigid-flexible composite crack-resistant inorganic terrazzo ground system and ground system

Abstract

The invention discloses a rigid-flexible composite anti-crack inorganic terrazzo ground system construction method and a ground system.The method comprises the steps that a base layer is coated with a high-permeability interface agent to form a first interface layer, and the first interface layer is a flexible interface layer; polymer modified mortar is laid on the first interface layer, and gridding cloth is embedded to form a stress dissipation layer; the polymer modified mortar is flexible polymer mortar; laying a structure leveling layer on the first interface layer; brushing a high-adhesion interface agent on the structure leveling layer to form a second interface layer; paving an inorganic terrazzo surface layer material on the second interface layer to form a facing layer; and a protective layer is constructed on the facing layer. The flexible first interface layer and the stress dissipation layer are arranged between the rigid base layer and the facing layer so as to absorb and disperse stress from the base layer and the facing layer, the rigid base layer and the rigid facing layer are in flexible connection, generation of cracks is effectively restrained, and the cracks are prevented from being transmitted upwards.

Description

Technical Field

[0001] This invention relates to the field of building decoration materials technology, and in particular to a construction method and flooring system for a rigid-flexible composite crack-resistant inorganic terrazzo flooring system. Background Technology

[0002] Terrazzo flooring is a common architectural decorative surface layer, possessing advantages such as good integrity, wear resistance, moisture resistance, and ease of cleaning. It is widely used in various public and industrial buildings. Traditional cast-in-place terrazzo flooring typically employs the following construction process: base treatment → application of interface agent → application of cement mortar bonding layer → installation of dividing strips → application of cement slurry bonding layer → spreading of binder material (using cement as a binder, mixed with aggregates such as stone particles) → coarse grinding → fine grinding → patching → finishing and polishing. This process uses ordinary silicate cement as the main cementitious material. Although it has certain wear resistance and compressive strength after molding, it also has obvious technical defects: First, cement itself has a large drying shrinkage, which easily generates shrinkage stress during the hardening process. In addition, the construction quality control is difficult, which makes the ground very prone to irregular cracking and hollowing. This problem is particularly prominent in large-area construction, and later repairs are difficult, affecting the overall aesthetics and functionality. Second, traditional terrazzo generates significant heat of hydration during mixing and setting. The high temperature is transmitted from the surface to the interior, which easily forms stress concentration areas inside. This leads to quality defects such as honeycomb and pits in the hardened structure and on the surface, affecting density and durability.

[0003] To overcome the shortcomings of the aforementioned traditional processes, several improved technical routes have been developed in the industry, mainly focusing on two aspects: "material innovation" and "process innovation." Epoxy / polyurethane resin-based terrazzo: This type of terrazzo uses epoxy resin or polyurethane and other organic polymer materials instead of cement as a binder. These materials impart excellent toughness, wear resistance, and chemical stability to the surface, resulting in a significant performance improvement. However, its disadvantages are also quite prominent: the cost of resin materials is much higher than traditional cement; the construction environment requires strict control (such as temperature and humidity); its environmental friendliness (VOC emissions) and weather resistance and UV resistance are poor; and it is prone to yellowing and aging after long-term use. Furthermore, it has extremely high requirements for the flatness and humidity of the substrate; otherwise, problems such as coating blistering and peeling are very likely to occur, and repairs after damage are difficult.

[0004] Precast terrazzo slabs / bricks: This technology embodies the concept of "prefabricated" construction, where terrazzo is prefabricated into slabs or bricks in a factory and then dry-laid on-site using adhesives. Its advantages lie in quick construction and consistent quality. However, its biggest drawback is the presence of seams between the slabs, making it difficult to achieve the seamless effect of traditional cast-in-place terrazzo. These seams easily accumulate dirt and bacteria, affecting the overall visual integrity and aesthetics, and ultimately sacrificing the inherent characteristic of terrazzo flooring as a continuous surface layer.

[0005] Inorganic terrazzo (high-performance cement-based): This technology still uses cement-based materials as the binder, but aims to improve the performance of traditional cement-based terrazzo by optimizing and upgrading the cement type, admixtures (such as silica fume, fly ash, slag, etc.), and additives (such as shrinkage reducers and toughening fibers). It significantly reduces efflorescence, improves the material's toughness and crack resistance, and retains the inherent advantages of inorganic materials, such as high fire resistance (up to A1 non-combustible), UV resistance, environmental friendliness, non-toxicity, and aging resistance. However, it does not fundamentally overcome the inherent characteristic of large shrinkage deformation in cement-based materials, and the risk of micro-cracking still exists during large-area construction. Summary of the Invention

[0006] This invention provides a construction method and system for a rigid-flexible composite crack-resistant inorganic terrazzo flooring system, aiming to solve the cracking problem of existing inorganic terrazzo floors.

[0007] In a first aspect, the present invention discloses a construction method for a rigid-flexible composite crack-resistant inorganic terrazzo flooring system, comprising: A highly penetrating interface agent is applied to the substrate to form a first interface layer, which is a flexible interface layer. On the first interface layer, a polymer-modified mortar is laid and a mesh fabric is embedded to form a stress-dissipating layer; the polymer-modified mortar is a flexible polymer mortar. A structural leveling layer is laid on the first interface layer; A high-adhesion interface agent is applied to the structural leveling layer to form a second interface layer; Inorganic terrazzo surface material is spread on the second interface layer to form a finishing layer; Apply a protective layer to the finish layer.

[0008] In some embodiments, after laying the structural leveling layer on the first interface layer, the method further includes: After the initial setting of the structural leveling layer, an integrated separator strip is installed. The integrated partition strip includes a vertically arranged main body and a horizontally arranged flange. One end of the flange is fixedly connected to the side of the main body, and the distance from the other end of the flange to the side of the main body is within a preset range. A part of the main body and the flange are inserted into the structural leveling layer, and another part of the main body protrudes from the structural leveling layer. The main body protruding from the structural leveling layer serves as a partition strip for the finishing layer.

[0009] In some embodiments, the distance from the other end of the flange to the side of the main body is within a preset range of 1 to 3 mm.

[0010] In some embodiments, the preselected elastic modulus of the polymer-modified mortar for the stress dissipation layer includes light-load and heavy-load grades. When laying the stress dissipation layer, the light-load grade polymer-modified mortar or the heavy-load grade polymer-modified mortar is selected according to the expected load.

[0011] In some embodiments, the mesh fabric is an alkali-resistant glass fiber mesh fabric.

[0012] In some embodiments, the material of the protective layer includes microporous repair powder, concrete curing agent, and antifouling and anti-seepage protective liquid.

[0013] In some embodiments, applying a protective layer on the finish layer includes: Minor defects in the finishing layer are repaired by applying the microporous repair powder. Apply the concrete hardener to allow it to penetrate the cement-based material of the finishing layer; The antifouling and anti-seepage protective liquid is sprayed after fine polishing.

[0014] In some embodiments, the step of laying polymer-modified mortar and embedding mesh fabric on the first interface layer to form a stress-dissipating layer includes: For the boundary areas, the mesh fabric is folded upwards during installation.

[0015] In some embodiments, the materials used for the first interface layer, the stress dissipation layer, the structural leveling layer, the second interface layer, the finishing layer, and the protective layer are all prefabricated in the factory.

[0016] Secondly, the present invention discloses an inorganic terrazzo flooring system, which is obtained by the construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system described in the first aspect. The inorganic terrazzo flooring system includes, from bottom to top, the base layer, the first interface layer, the stress dissipation layer, the structural leveling layer, the second interface layer, the finishing layer, and the protective layer.

[0017] The beneficial effects of this invention: This invention discloses a construction method and system for a rigid-flexible composite crack-resistant inorganic terrazzo flooring system. The method includes: applying a high-penetration interface agent to a base layer to form a first interface layer, which is a flexible interface layer; laying polymer-modified mortar and embedding a mesh fabric on the first interface layer to form a stress-dissipating layer; the polymer-modified mortar is a flexible polymer mortar; laying a structural leveling layer on the first interface layer; applying a high-adhesion interface agent to the structural leveling layer to form a second interface layer; spreading inorganic terrazzo surface material on the second interface layer to form a finishing layer; and constructing a protective layer on the finishing layer. By setting a flexible first interface layer and a stress-dissipating layer between the rigid base layer and the finishing layer, the stress from the base layer and the finishing layer is absorbed and dispersed, creating a "soft connection" between the rigid base layer and the rigid finishing layer. This effectively inhibits the generation of cracks and prevents cracks from propagating upwards, thereby solving the existing cracking problem of inorganic terrazzo floors. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart illustrating the construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system provided in an embodiment of the present invention; Figure 2 This is a hierarchical structure diagram of the inorganic terrazzo flooring system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the installation of the integrated separator strip used in the construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system provided in the embodiment of the present invention.

[0020] Reference numerals: 1. Base layer; 2. First interface layer; 3. Stress dissipation layer; 4. Structural leveling layer; 5. 6. Second interface layer; 7. Finishing layer; 8. Protective layer; 9. Integrated partition strip; 10. Main body; 11. Flange. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and, or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and, or collections thereof.

[0023] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should also be further understood that the terms “and” and “or” as used in this specification and the appended claims refer to any combination of one or more of the associated listed items and all possible combinations, and include such combinations.

[0026] like Figure 1 and Figure 2 As shown, Figure 1 A flowchart illustrating the construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system provided in an embodiment of the present invention; Figure 2 This is a hierarchical structure diagram of the inorganic terrazzo flooring system provided in an embodiment of the present invention. The embodiment of the present invention provides a construction method for a rigid-flexible composite crack-resistant inorganic terrazzo flooring system, applicable to various types of terrazzo flooring construction, especially in large-area terrazzo flooring applications. It can achieve large partitions, prevent cracking, and prevent efflorescence. The completed system is aesthetically pleasing, glossy, and has a superior texture. The construction method includes steps S1 to S6.

[0027] S1. Apply a highly penetrating interface agent to the substrate to form a first interface layer, wherein the first interface layer is a flexible interface layer.

[0028] In this embodiment, the base layer 1 can be a floor slab or a rigid ground layer, generally a concrete base layer 1, which is used for structural load-bearing. During the construction of the base layer 1, it is necessary to ensure that the base layer 1 is firm, the strength of the base layer 1 is above 25 MPa, the moisture content is <8%, and the surface of the base layer 1 is cleaned to ensure that its surface is free of debris and oil stains.

[0029] A high-penetration interface agent is applied to the surface of the substrate 1 to form the first interface layer 2. The agent is applied evenly using a roller, with a coating amount of approximately 0.15 kg / m². 2 Once the surface is dry to the touch (approximately 20-40 minutes), proceed to the next step immediately. This first interface layer 2 serves two purposes: firstly, it enhances the adhesion of the base layer 1, seals pores, and to some extent reduces the free migration of moisture and soluble alkali from the base layer 1 to the finishing layer 6, thus aiding in suppressing efflorescence; secondly, the coating formed after the high-penetration interface agent cures possesses a certain degree of flexibility, allowing it to adapt to slight deformations of the substrate without easily cracking. Furthermore, it forms a thin film on the surface of the base layer 1. This film, with its flexibility, buffers stress concentration caused by differences in shrinkage rates between different materials (i.e., different layers), preventing concentrated tensile stress at the interface and thus better ensuring adhesion and structural stability.

[0030] S2. On the first interface layer 2, a polymer-modified mortar is laid and a mesh cloth is embedded to form a stress dissipation layer 3; the polymer-modified mortar is a flexible polymer mortar.

[0031] In this embodiment, after applying the high-penetration interface agent, the surface is left to stand for 20-40 minutes at an ambient temperature of 23±2°C and a humidity of 50±10% until it is surface-dry to the point of being "not sticky to the touch and having a matte finish." Immediately afterward, polymer-modified mortar is laid and a mesh fabric is embedded to form a thin layer of approximately 3-5 mm, i.e., the stress-dissipating layer 3. The mesh fabric must be flat and compacted, with joint widths ≥100 mm, to absorb and disperse stress from the base layer 1 and the finishing layer 6, creating a "soft connection" between the rigid base layer 1 and the rigid finishing layer 6, effectively inhibiting crack formation and preventing crack propagation upwards. The mesh fabric has a surface density of 160 g / m². 2 Alkali-resistant fiberglass mesh. The alkali-resistant fiberglass mesh primarily reinforces the polymer-modified mortar, evenly distributing loads, strengthening against cracks, and improving toughness and overall integrity. Specifically, when the base layer 1 shrinks, deforms, or is subjected to external forces, the alkali-resistant fiberglass mesh can disperse concentrated stress over a larger area, effectively preventing micro-cracks from expanding into macro-cracks. Thus, the polymer-modified mortar, combined with the embedded mesh, forms the "flexible" crack-resistant layer in a "rigid-flexible composite" structure.

[0032] Specifically, the rigid structure of traditional inorganic terrazzo systems causes deformation stresses (such as shrinkage, temperature, and load stress) in the base layer 1 to be directly transmitted to the surface layer with almost no buffering. Cracks occur when the stress exceeds the tensile strength of the surface layer material. The "stress dissipation layer 3" provided in this embodiment aims to break this rigid, direct stress transmission path. Its core function is: Stress absorption: Utilizing the deformation capacity of flexible materials to absorb and store a portion of strain energy.

[0033] Stress dispersion: By reinforcing the mesh structure of the material, concentrated stresses in the form of points or lines are dispersed over a larger area.

[0034] Stress redistribution: Change the direction and magnitude of stress transmission so that it is released smoothly within the system, avoiding the formation of destructive stress peaks in the finishing layer 6.

[0035] The superior performance of this stress-dissipating layer 3 stems from the synergistic effect of the polymer-modified mortar (matrix phase) and the alkali-resistant mesh (reinforcing phase): I. The role of polymer-modified mortar (flexible matrix phase): Providing a "flexible" nature: By incorporating polymers such as redispersible latex powder into ordinary cement mortar, the mortar forms a polymer-cement composite network structure after hardening. This results in a significantly lower elastic modulus than traditional cement mortar and the top inorganic terrazzo layer, thus enabling it to have higher deformation capacity and flexibility.

[0036] Achieving energy conversion and buffering: When subjected to tensile or shear stress transmitted by the base layer 1, the flexible mortar matrix can "give way" through its own micro-elastic deformation, converting some of the mechanical energy into the internal energy of the material, thus consuming and attenuating the energy of the stress wave like a "buffer pad".

[0037] Utilizing creep properties: Polymer-modified materials exhibit slow deformation under certain stress (creep), which allows stress to partially relax during long-term action and avoids rapid stress accumulation.

[0038] II. The function of the embedded alkali-resistant mesh fabric (reinforcing / dispersed phase): A three-dimensional reinforcement network is established: the mesh fabric is uniformly embedded in the flexible mortar to form a continuous, high-tensile-strength three-dimensional reinforcement skeleton. When the matrix deforms, the mesh fabric immediately bears the tensile force, preventing excessive concentration of deformation.

[0039] Stress dispersion and "bridging" effect: This is one of the most crucial functions. Once microcracks appear in the matrix due to stress, the mesh fabric, with its fibers spanning the cracks, can effectively "bridge" and transfer the stress on both sides of the crack, thereby: Passivate crack tips: prevent microcracks from rapidly expanding into macroscopic cracks.

[0040] Multidirectional stress: The concentrated tensile stress that was originally perpendicular to the crack is dispersed and transformed into multidirectional distributed stress along the warp and weft directions of the mesh, which greatly increases the energy required for cracking.

[0041] Constraint and guidance: The mesh fabric constrains the free flow of the flexible mortar under stress, guiding its deformation in a more uniform and controllable manner.

[0042] III. Engineering Implementation of "Soft Connections": Modulus transition: Through the synergy of materials and structure, a flexible transition zone with significant differences in mechanical properties is formed between the relatively rigid base layer 1 and the finishing layer 6, achieving a smooth transition in stiffness and reducing the interfacial stress caused by abrupt changes in stiffness.

[0043] Deformation coordination: It allows the base layer 1 to undergo a certain degree of dimensional change (such as shrinkage) under temperature and humidity variations, without forcibly transferring an equal amount of deformation to the finishing layer 6. In other words, it "absorbs" a portion of the deformation difference.

[0044] Necessity of seam treatment: The requirement that the seam width of the mesh fabric be ≥100mm is to ensure the continuity of the reinforcement network, prevent the formation of weak links in stress dissipation at the seams, and ensure that stress can be continuously transmitted and redistributed through the overlapping areas.

[0045] In one embodiment, the preselected elastic modulus of the polymer-modified mortar of the stress dissipation layer 3 includes light-load grade and heavy-load grade. When laying the stress dissipation layer 3, the light-load grade polymer-modified mortar or the heavy-load grade polymer-modified mortar is selected according to the expected load.

[0046] In this embodiment, based on the expected load of the project, the supplier provides matching polymer-modified mortar products with different elastic modulus grades to achieve precise design and avoid the problems of being "too soft" or "too hard". For example, see the table below: Thus, by pre-producing two polymer-modified mortars with different polymer content, different project load requirements can be met.

[0047] In one embodiment, the step of laying polymer-modified mortar and embedding mesh fabric on the first interface layer 2 to form a stress dissipation layer 3 includes: for the boundary portion, performing an upward wrapping treatment when setting the mesh fabric.

[0048] In this embodiment, the boundary area can be a wall, column base, or other facade that contacts the ground system. These areas are prone to stress concentration. By applying mesh fabric to these areas and wrapping it upwards, the stress transfer and transition in the edge area can be strengthened, thus avoiding stress concentration at the boundary.

[0049] Specifically, the junctions between the ground system and vertical components such as walls and column bases (collectively referred to as "boundary areas") are structurally weak points, susceptible to damage due to the following reasons: Shrinkage stress concentration: Inorganic surface materials (such as cement-based terrazzo) undergo drying shrinkage and chemical shrinkage during the hardening process. In the broad central area, shrinkage can proceed towards the free ends; however, at the boundaries, shrinkage is fully constrained by the facade components, resulting in a high concentration of stress near the corners.

[0050] Temperature stress concentration: The thermal expansion and contraction of materials are also constrained at the boundaries.

[0051] Shear and peel stress: Due to the slight deformation difference between the base layer 1 and the finishing layer 6, as well as the effect of the load, shear force parallel to the wall surface and tensile stress that causes the surface layer to "peel" from the facade are easily generated at the boundary.

[0052] Without special treatment, these concentrated stresses can easily lead to "L"-shaped cracks (i.e., cracks along both the floor and the wall), hollowing, and even peeling of the finishing layer at the boundary.

[0053] "Upward folding treatment" refers to folding the originally horizontally laid alkali-resistant fiberglass mesh upwards at the boundaries along the adjacent facades to a certain height, and then firmly bonding it with polymer-modified mortar, thereby forming a continuous, "L"-shaped flexible reinforcing skeleton. Its mechanism of action is as follows: Establishing a continuous stress transfer and dissipation path: The folded mesh fabric mechanically connects the horizontal stress dissipation layer 3 to the vertical facade. When the horizontal surface layer contracts or is under tension, the stress can be transferred to the vertical base layer 1 through the folded part, avoiding the sudden accumulation and blockage of stress at right-angle inflection points. This changes the stress pattern at the boundary, transforming the concentrated stress that might otherwise lead to cracking into distributed stress borne by the folded mesh fabric and gradually dissipated along its length.

[0054] It provides strong crack resistance and reinforcement: In the right-angled boundary area, the wrapped mesh fabric forms bidirectional reinforcement (horizontal and vertical), greatly improving the tensile strength and toughness of this part against cracking. Like an "internal reinforcing rib," it restrains the deformation of the polymer mortar in this area, effectively inhibiting the generation and propagation of microcracks.

[0055] Improved interlayer bonding and system integrity: The over-wrapping treatment increases the contact and bonding area between the mesh and mortar and the facade and base layer 1, enhances the anchoring force of the system at the edges, prevents the surface layer from warping or peeling at the boundary, ensures the transition area from the ground to the facade, and ensures the continuous and uninterrupted function of the stress dissipation layer 3, maintaining the integrated performance of the "rigid-flexible composite" system.

[0056] S3. Lay a structural leveling layer on the first interface layer.

[0057] In this embodiment, the structural leveling layer 4 serves to provide precise elevation and core strength for the floor system. The structural leveling layer 4 can be formed by laying modified nano-polymer crack-resistant mortar. The thickness of the structural leveling layer 4 is determined according to design requirements, and it must meet the following criteria: 28-day compressive strength ≥ 30 MPa, flexural strength ≥ 10 MPa, and tensile bond strength ≥ 1.5 MPa. The structural leveling layer 4 is a crucial structural layer in the inorganic terrazzo floor system provided by this invention, directly bearing and dispersing all usage loads (such as pedestrian traffic, equipment weight, and impact) from the upper finishing layer 6 (inorganic terrazzo), and uniformly transferring them to the lower interface layer and base layer 1. It is the main mechanical framework determining the overall load-bearing capacity and long-term structural stability of the floor system. Even if the base layer 1 has localized uneven strength or minor defects, the structural leveling layer 4, with sufficient thickness and strength, can overcome these weaknesses, providing a homogeneous and solid new working surface, fundamentally avoiding surface hollowing and damage caused by problems with the base layer 1. Furthermore, it provides a precise reference surface for the construction of finishing layer 6. The final thickness, flatness, and slope (if drainage is required) of inorganic terrazzo finishing layer 6 depend entirely on the accuracy of this leveling layer. The use of "modified nano-polymer crack-resistant mortar" as the material for this layer is a key innovation in achieving the aforementioned core functions and integrating it into the overall "crack-resistant and alkali-resistant" system. It optimizes the microstructure by incorporating nanomaterials: the incorporated nanomaterials (such as nano-silica and nano-calcium carbonate) have extremely high surface activity, which can more fully fill the micro-voids between cement particles, promote hydration reactions, and make the mortar's microstructure more compact. This brings three major benefits: increased strength: achieving higher early and later compressive and flexural strength; enhanced impermeability: the dense structure effectively blocks the penetration of moisture and harmful ions, blocking the efflorescence pathway from the intermediate layer; reduced shrinkage: by optimizing particle size distribution and accelerating hydration, drying shrinkage is reduced, lowering the risk of cracking from the source.

[0058] In another embodiment, the structural leveling layer 4 can also be formed by pouring C30 or higher strength steel fiber reinforced concrete.

[0059] In one embodiment, after laying the structural leveling layer on the first interface layer, the method further includes: installing an integrated separator strip after the structural leveling layer has initially set; like Figure 3As shown, the integrated partition strip 8 includes a vertically arranged main body 81 and a horizontally arranged flange 82. One end of the flange 82 is fixedly connected to the side of the main body 81, and the distance from the other end of the flange 82 to the side of the main body 81 is within a preset range. A part of the main body 81 and the flange 82 are inserted into the structural leveling layer 4, and another part of the main body 81 protrudes from the structural leveling layer 4. The main body 81 protruding from the structural leveling layer 4 serves as a partition strip for the finishing layer 6.

[0060] In this embodiment, the distance from the other end of the flange portion 82 to the side of the main body portion 81 is preset to a range of 1-3 mm, specifically 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm. Immediately after the structural leveling layer 4 has initially set, the integrated partition strip 8 is embedded into the structural leveling layer 4. The main body portion 81 of the integrated partition strip 8, protruding from the structural leveling layer 4, serves as the partition strip for the finishing layer 6, and its height protruding from the structural leveling layer 4 is the same as the preset height of the finishing layer 6. The horizontally positioned flange of the integrated partition strip 8 can form a continuous weak surface within the structural layer. When the mortar of the structural leveling layer 4 shrinks, it cracks along this weak surface, forming a straight, horizontal induced joint. This induced joint is offset from the vertical partition strip by a distance of 1-3 mm. This offset allows the finishing layer 6 to form a "micro-cantilever beam" above the induced joint, creating a "cantilever beam" effect and achieving stress transfer. When stress is transmitted from bottom to top, a portion is first released by the induced joints of the structural leveling layer 4. The remaining stress is dispersed through the "cantilever beam" and finally guided to the surface layer separation joint (i.e., the location of the main body 81 of the integrated separator strip 8) for orderly release, thereby effectively preventing disordered cracking and achieving a reliable "double crack resistance" structure. When stress is transmitted from top to bottom, the "cantilever beam" decomposes the large stress into two stages of release, reducing the stress peak value borne by a single point. Even if there is a very small probability that the surface layer crack does not completely open at the main body 81 of the integrated separator strip 8, it will be blocked by this 1-3mm staggered area and will not extend directly downward to the leveling layer, avoiding the generation of structural through cracks and achieving a "double crack resistance" grid structure.

[0061] Among them, the integrated partition strip 8 is a copper strip prefabricated in the factory. It ensures that the horizontal misalignment of 1-3mm between the induced seam and the partition strip of the finishing layer 6 (i.e., the part of the main body 81 of the integrated partition strip 8 that protrudes from the structural leveling layer 4) is prefabricated in the factory, avoiding human error in on-site processing and ensuring 100% realization of the "double crack resistance" structure.

[0062] S4. Apply a high-adhesion interface agent to the structural leveling layer to form a second interface layer.

[0063] In this embodiment, the second interface layer 5 serves to ensure the integrity of the finishing layer 6 and the structural leveling layer 4. When applying the high-adhesion interface agent, a roller is used for uniform application, avoiding missed areas, to form a uniformly rough surface on the structural leveling layer 4. This rough surface significantly increases the effective bonding surface area, providing an excellent mechanical bonding foundation for the subsequent inorganic terrazzo surface material. Its uniformity ensures the homogeneity of stress transfer, avoiding localized stress concentration caused by uneven interface roughness. The high-adhesion interface agent can be an acrylic emulsion-based or epoxy emulsion-based interface treatment material with bidirectional penetration and reaction capabilities, specifically designed for the structural leveling layer 4; the coating amount can be 0.2 kg / m². 2 .

[0064] S5. Lay inorganic terrazzo surface material on the second interface layer to form a finishing layer.

[0065] In this embodiment, the finishing layer 6 serves as the decorative and wear-resistant surface layer of the flooring system. It is made of inorganic terrazzo surface material and is laid integrally on the second interface layer 5, with a thickness of 10-15mm. The finishing layer 6 directly bears all usage loads, including those from pedestrians and equipment, as well as environmental influences. The inorganic terrazzo material used provides the necessary wear resistance, impact resistance, and stain resistance through its hard aggregates and dense cementitious structure, acting as a barrier for the long-term service of the flooring system. The finishing layer 6 determines the final visual effect of the floor. Through integral laying, caulking, grinding, and polishing, it achieves a large-area seamless, richly colored, and adjustable gloss decorative effect, preserving the core aesthetic value of traditional terrazzo.

[0066] S6. Apply a protective layer to the finished layer.

[0067] In this embodiment, the protective layer 7 is constructed in strict accordance with the process of "rough grinding - scraping - fine grinding - curing - fine polishing - protection" so that the ground system can achieve a dense and smooth surface, and the protective layer 7 plays a protective role for the ground system.

[0068] In one embodiment, the protective layer 7 comprises a special protective material group consisting of (not a mixture of) microporous repair powder, concrete curing agent, and antifouling and anti-seepage protective liquid. The application of the protective layer 7 on the finishing layer 6 includes: repairing minor defects in the finishing layer 6 by applying the microporous repair powder; applying the concrete curing agent to allow it to penetrate into the cement-based material of the finishing layer 6; and spraying the antifouling and anti-seepage protective liquid after fine polishing.

[0069] In this embodiment, the coarse grinding step can be performed using a professional grinding machine equipped with 30# to 50# metal diamond grinding discs. This is done after the curing period of the finishing layer 6 is complete (typically with a strength ≥ 70% of the design value). During grinding, the machine should move at a uniform speed in a crisscross pattern, continuously adding water for cooling, lubrication, and to remove slurry. Grinding continues until all existing scratches and grinding marks on the surface of the finishing layer 6 are completely removed, revealing a uniform, fresh, and open surface without any "bright spots" (i.e., un-ground bright spots). The plastering step uses microporous repair powder to repair minor defects in the finishing layer 6, providing a high-quality base surface. The fine grinding step uses resin diamond grinding discs with grits ranging from 100#, 200#, 400# to 800#, grinding step by step. Each time a higher grit disc is used, the grinding marks left from the previous step must be completely eliminated. The curing step involves applying a concrete hardener to allow it to penetrate into the cement-based material of the finishing layer 6, increasing its surface hardness and density, and enhancing its overall integrity. Fine polishing can be performed on the dried, cured surface using polishing pads with grits of 1500#, 3000#, or even higher (such as resin polishing pads or high-speed polishing pads). This process generates heat through friction, further melting, flowing, and smoothing the already formed dense layer on the surface, ultimately resulting in a high-gloss, semi-gloss, or matte finish as required by the design. Finally, a special anti-fouling and anti-seepage protective liquid is sprayed to seal the surface micropores of the finishing layer 6, reducing stress changes caused by external moisture intrusion, thereby achieving overall stability of the layered structure of the inorganic terrazzo flooring system.

[0070] In one embodiment, the materials used for the first interface layer 2, the stress dissipation layer 3, the structural leveling layer 4, the second interface layer, the finishing layer 6, and the protective layer 7 are all prefabricated in the factory.

[0071] In this embodiment, the high-penetration interface agent used in the first interface layer 2, the polymer-modified mortar and alkali-resistant glass fiber mesh used in the stress dissipation layer 3, the modified nano-polymer crack-resistant mortar used in the structural leveling layer 4, the high-adhesion interface agent used in the second interface layer, the inorganic terrazzo surface material used in the finishing layer 6, and the protective material set used in the protective layer 7 are all supplied by a complete series of products. For example, the high-penetration interface agent used in the first interface layer 2 is specifically used for the treatment of the base layer 1 and is compatible with the polymer-modified mortar used in the stress dissipation layer 3. The polymer-modified mortar ensures compatibility with the high-penetration interface agent used in the first interface layer 2 and the modified nano-polymer crack-resistant mortar used in the upper structural leveling layer 4. The high-adhesion interface agent used in the second interface layer is specifically used on the surface of the structural leveling layer 4 and is compatible with the inorganic terrazzo material of the finishing layer 6. The polymer and nano components in the modified nano-polymer crack-resistant mortar are premixed by the manufacturer to ensure stable quality. The system's dedicated protective material set (including micropore repair powder, concrete curing agent, and antifouling and anti-seepage protective liquid) solves complex chemical compatibility issues at the factory level, eliminating the risk of material incompatibility from the source.

[0072] In one embodiment, before large-scale construction, a ≥1m wide area is constructed using the above-described construction method. 2 The ground system served as a physical sample and was confirmed by all parties. A pull-out tester was used to test the interlayer bond strength (≥1.0MPa), and a 2m straightedge was used to check the flatness (≤2mm). Test blocks were reserved to verify the strength of the finishing layer 6 and the structural leveling layer. Key processes (such as the laying of the mesh fabric for the stress dissipation layer 3, the pouring of the structural leveling layer 4, and the installation of the integrated partition strip 8) were documented visually to ensure quality traceability.

[0073] See also Figure 2 This invention also provides an inorganic terrazzo flooring system, which is obtained by the construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system disclosed in the above embodiments. The inorganic terrazzo flooring system includes, from bottom to top, the base layer 1, the first interface layer 2, the stress dissipation layer 3, the structural leveling layer 4, the second interface layer, the finishing layer 6, and the protective layer 7.

[0074] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A construction method for a rigid-flexible composite crack-resistant inorganic terrazzo flooring system, characterized in that, The construction method includes: A highly penetrating interface agent is applied to the substrate to form a first interface layer, which is a flexible interface layer. On the first interface layer, a polymer-modified mortar is laid and a mesh fabric is embedded to form a stress-dissipating layer; the polymer-modified mortar is a flexible polymer mortar. A structural leveling layer is laid on the first interface layer; A high-adhesion interface agent is applied to the structural leveling layer to form a second interface layer; Inorganic terrazzo surface material is spread on the second interface layer to form a finishing layer; Apply a protective layer to the finish layer.

2. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 1, characterized in that, After laying the structural leveling layer on the first interface layer, the method further includes: After the initial setting of the structural leveling layer, an integrated separator strip is installed. The integrated partition strip includes a vertically arranged main body and a horizontally arranged flange. One end of the flange is fixedly connected to the side of the main body, and the distance from the other end of the flange to the side of the main body is within a preset range. A part of the main body and the flange are inserted into the structural leveling layer, and another part of the main body protrudes from the structural leveling layer. The main body protruding from the structural leveling layer serves as a partition strip for the finishing layer.

3. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 2, characterized in that, The preset range of the distance from the other end of the flange to the side of the main body is 1~3mm.

4. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 1, characterized in that, The preselected elastic modulus of the polymer-modified mortar for the stress dissipation layer includes light-load and heavy-load grades. When laying the stress dissipation layer, the light-load grade polymer-modified mortar or the heavy-load grade polymer-modified mortar is selected according to the expected load.

5. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 1, characterized in that, The mesh fabric is an alkali-resistant glass fiber mesh fabric.

6. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 1, characterized in that, The materials of the protective layer include microporous repair powder, concrete curing agent, and antifouling and anti-seepage protective liquid.

7. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 6, characterized in that, The application of a protective layer on the finishing layer includes: Minor defects in the finishing layer are repaired by applying the microporous repair powder. Apply the concrete hardener to allow it to penetrate the cement-based material of the finishing layer; The antifouling and anti-seepage protective liquid is sprayed after fine polishing.

8. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 1, characterized in that, The step of laying polymer-modified mortar and embedding mesh fabric on the first interface layer to form a stress-dissipating layer includes: For the boundary areas, the mesh fabric is folded upwards during installation.

9. The construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to claim 1, characterized in that, The materials used for the first interface layer, the stress dissipation layer, the structural leveling layer, the second interface layer, the finishing layer, and the protective layer are all prefabricated in the factory.

10. An inorganic terrazzo flooring system, obtained by the construction method of the rigid-flexible composite crack-resistant inorganic terrazzo flooring system according to any one of claims 1 to 9, characterized in that, The inorganic terrazzo flooring system comprises, from bottom to top, the base layer, the first interface layer, the stress dissipation layer, the structural leveling layer, the second interface layer, the finishing layer, and the protective layer.

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