A heat-insulating swallow-tail plate phosphogypsum sprayed wall and a construction method thereof

Abstract

The application discloses a heat-preservation dovetail plate phosphogypsum spray-built wall and a construction method thereof, and relates to the technical field of house building walls, which comprises a light steel skeleton, dovetail plates arranged on the two sides of the light steel skeleton, a phosphogypsum leveling layer and a mortar spray-built layer arranged on the side of the dovetail plates away from the light steel skeleton in sequence, a containing cavity formed between the light steel skeleton and the dovetail plates arranged on the two sides of the light steel skeleton, and a filling body arranged in the containing cavity. The phosphogypsum leveling layer has good fine adjustment and leveling capacity, provides a uniform and stable base for the outer mortar spray layer, significantly improves the surface flatness of the wall, and avoids the phosphogypsum leveling layer from being damp. The structure realizes the integrated functions of structure bearing, heat preservation and sound insulation, crack and peeling prevention, and construction leveling.

Description

Technical Field

[0001] This invention relates to the field of building wall construction technology, specifically to a thermal insulation dovetail plate phosphogypsum sprayed wall and its construction method. Background Technology

[0002] Walls are important components in buildings that serve to bear loads, enclose spaces, or divide areas. They are classified as load-bearing or non-load-bearing walls based on their load-bearing capacity. In some non-load-bearing wall construction projects, to speed up construction, a light steel frame is typically used for rapid assembly. Dovetail plates are then added to both sides before spraying, ultimately forming a cavity. During sprayed wall construction, it's crucial to ensure the flatness and verticality of the finished wall surface. While phosphogypsum sprayed walls can achieve leveling relatively quickly, existing phosphogypsum sprayed walls typically apply the phosphogypsum only to the outermost layer. This makes them susceptible to moisture, which can reduce the load-bearing capacity of the outer decorative layer. Furthermore, the presence of numerous hollow spaces in the middle of the wall, combined with the steel frame and these gaps, significantly reduces its insulation and soundproofing capabilities, potentially causing considerable inconvenience to homeowners.

[0003] Therefore, it is necessary to develop and design a thermal insulation dovetail plate phosphogypsum sprayed wall and its construction method, which is not only convenient for leveling, but also less prone to moisture after completion, and achieves stable installation of the outer mortar decorative surface. This is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a thermal insulation dovetail plate phosphogypsum sprayed wall and its construction method, which not only facilitates leveling but also prevents moisture absorption after completion, thus ensuring a stable installation of the outer mortar decorative surface.

[0005] To achieve the above objectives, the present invention provides the following solution: A thermal insulation dovetail phosphogypsum sprayed wall includes a light steel keel frame, dovetail plates arranged on both sides of the light steel keel frame, a phosphogypsum leveling layer and a mortar spraying layer arranged sequentially on the side of the dovetail plates away from the light steel keel frame, and a receiving cavity is formed between the light steel keel frame and the dovetail plates arranged on both sides of the light steel keel frame, and a filler is provided in the receiving cavity.

[0006] Preferably, the light steel keel frame includes a frame frame, horizontal ribs and vertical ribs arranged vertically and intersectingly within the frame frame.

[0007] Preferably, at least one of the dovetail plates is provided with an injection hole, which communicates with the receiving cavity.

[0008] Preferably, the filler includes a keel filler formed by casting through an injection hole and a gap partition, wherein the keel filler is used to fill the cavity inside the light steel keel frame, and the gap partition is used to fill the cavity between the dovetail plate and the light steel keel frame.

[0009] Preferably, the filler includes a keel filler plate disposed between the frame and the horizontal and vertical ribs, and between the horizontal and vertical ribs, and a gap partition disposed between the keel filler plate and the dovetail plate, wherein the gap partition has a dovetail groove on one side that fits against the dovetail plate, which mates with the dovetail groove of the dovetail plate.

[0010] Preferably, a filling and injection gap pad is provided between the light steel keel frame and at least one of the dovetail plates, the filling and injection gap pad being used to connect the light steel keel frame and the dovetail plates.

[0011] Preferably, the filling injection gap pad includes a block body, a slot formed on the block body, and a fixing hole provided on the block body. The light steel keel frame has a protrusion prefabricated to cooperate with the slot, and the fixing hole is connected to the dovetail plate through a fastener.

[0012] Preferably, vertical ribs are provided between the phosphogypsum leveling layer and the mortar spraying layer.

[0013] Preferably, a buried conduit assembly is provided between the dovetail plate and the phosphogypsum leveling layer.

[0014] This invention also discloses a construction method for a thermal insulation dovetail plate phosphogypsum sprayed wall, which utilizes the above-mentioned thermal insulation dovetail plate phosphogypsum sprayed wall, characterized by the following steps: Fix the light steel keel frame; Install the dovetail plate, the filler, the phosphogypsum leveling layer, and the mortar spraying layer.

[0015] The present invention achieves the following technical effects compared to the prior art: A stable cavity is formed by a light steel keel frame and dovetail plates on both sides, and a filler is installed. At the same time, a phosphogypsum leveling layer and a mortar spraying layer are sequentially installed on the outside of the dovetail plates. On the one hand, the dovetail structure of the dovetail plates enhances the mechanical interlocking force between the layers, effectively preventing the leveling layer and the spraying layer from hollowing, cracking and falling off. On the other hand, the phosphogypsum leveling layer has good fine-tuning and leveling ability, providing a uniform and stable base for the outer mortar spraying layer, significantly improving the flatness of the wall surface, and preventing the phosphogypsum leveling layer from getting damp. This structure realizes the integrated functions of structural load-bearing, thermal insulation and sound insulation, crack prevention and peeling prevention and construction leveling. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Appendix Figure 1 This is a schematic diagram of the overall structure of the thermal insulation dovetail plate phosphogypsum sprayed wall disclosed in this invention. Appendix Figure 2 This is an exploded structural diagram of the thermal insulation dovetail plate phosphogypsum sprayed wall disclosed in this invention. Appendix Figure 3 This is a schematic diagram of the injection cavity structure for the thermal insulation dovetail plate phosphogypsum sprayed wall disclosed in this invention. Appendix Figure 4 This is a schematic diagram of the gap filling pad structure for the thermal insulation dovetail plate phosphogypsum sprayed wall disclosed in this invention. Among them, 1. Light steel keel frame; 11. Frame-shaped frame; 12. Vertical stiffener; 13. Horizontal stiffener; 2. Filler; 21. Gap layer; 22. Keel filler; 3. Non-perforated dovetail plate; 4. Perforated dovetail plate; 41. Injection hole; 5. Phosphogypsum leveling layer; 6. Mortar spraying layer; 7. Vertical stiffener; 8. Filling injection gap pad; 81. Block body; 82. Card groove; 83. Fixing hole; 9. Buried conduit box assembly. Detailed Implementation

[0018] 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 embodiments of the present invention, and not all embodiments. 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.

[0019] The purpose of this invention is to provide a thermal insulation dovetail plate phosphogypsum sprayed wall and its construction method, which is not only easy to level, but also not easy to get damp after completion, and achieves stable installation of the outer mortar decorative surface.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] refer to Figures 1-3The thermal insulation dovetail phosphogypsum sprayed wall disclosed in this embodiment of the invention includes at least a light steel keel frame 1. Dovetail plates are provided on both sides of the light steel keel frame 1. On the side of the dovetail plate away from the light steel keel frame 1, a phosphogypsum leveling layer 5 and a mortar spraying layer are sequentially provided. That is, the two sides of the light steel keel frame 1 are symmetrical. The light steel keel frame 1 and the dovetail plates provided on both sides of the light steel keel frame 1 together form a receiving cavity. A filler 2 is provided in the receiving cavity. The light steel keel frame 1 and the dovetail plates on both sides form a stable receiving cavity and are filled with filler. 2. Simultaneously, a phosphogypsum leveling layer 5 and a mortar spraying layer are sequentially installed on the outside of the dovetail plate. On the one hand, the dovetail structure of the dovetail plate enhances the mechanical interlocking force between the layers, effectively preventing hollowing, cracking, and peeling of the leveling layer and the spraying layer. On the other hand, the phosphogypsum leveling layer 5 has good fine-tuning and leveling capabilities, providing a uniform and stable base for the outer mortar spraying layer, significantly improving the flatness of the wall surface, and preventing the phosphogypsum leveling layer 5 from getting damp. This structure achieves the integrated functions of structural load-bearing, thermal insulation and sound insulation, crack prevention and peeling prevention, and construction leveling.

[0022] It should be noted that filler 2 can be made of lightweight thermal and sound insulation materials, such as inorganic materials such as thermal insulation mortar made of expanded perlite, vitrified microspheres, expanded vermiculite and cement-based mixture, or on-site poured foamed concrete; organic materials such as molded polystyrene foam board (EPS), extruded polystyrene foam board (XPS), rigid polyurethane foam board or on-site foamed polyurethane; composite materials such as concrete particle thermal insulation slurry made of cement-based and modified polystyrene particles, or fiber fillers such as rock wool and glass wool; in addition, microcapsule composite slurry with phase change energy storage function can also be used to improve the thermal inertia of the wall.

[0023] In addition, a waterproof material layer can be sprayed on the outside of the mortar spraying layer, which can effectively block external moisture from seeping into the interior of the wall, prevent the phosphogypsum leveling layer from becoming damp and powdery and the light steel keel from rusting, and significantly improve the moisture-proof, impermeable and durable performance of the wall.

[0024] The waterproofing layer can be one or more of the following: polymer cement waterproofing coating, polyurethane waterproofing coating, acrylic waterproofing coating, or cement-based penetrating crystalline waterproofing slurry, with a coating thickness of 0.5mm to 2.0mm. This waterproofing layer effectively seals micro-cracks on the surface of the mortar spray coating, preventing the penetration of liquid water and water vapor, while simultaneously improving the wall's freeze-thaw resistance and weather resistance, thus extending the wall's service life. refer to Figures 1-3In one embodiment, the light steel keel frame 1 includes a frame 11, within which are arranged mutually perpendicular and intersecting horizontal ribs 13 and vertical ribs 12. This not only significantly improves the overall bending stiffness and torsional stability of the keel frame, effectively resisting all-directional loads generated during transportation, installation, and use of the wall, and preventing frame deformation; at the same time, the multiple grid units formed by the intersection of the horizontal and vertical ribs 12 can play a role in zoning and limiting the filling material 2 in the cavity and uniformly bearing the load, preventing the filling material 2 from settling, accumulating, or having local voids under gravity or vibration, and ensuring that the thermal insulation and sound insulation material is evenly distributed, dense, and full throughout the entire height of the wall; in addition, the grid structure also provides more discrete fixing connection points for the dovetail plates on both sides, enhancing the connection reliability between the dovetail plates and the keel frame, and further improving the integrity and crack resistance of the wall.

[0025] refer to Figures 1-3 In one implementation, at least one dovetail plate is provided with an injection hole 41, which communicates with the receiving cavity. The injection hole 41 can be provided on both dovetail plates or only one dovetail plate. Multiple injection holes 41 can be provided, evenly distributed on the dovetail plates. When only one dovetail plate has an injection hole 41, the dovetail plate is divided into a perforated dovetail plate 4 and a non-perforated dovetail plate 3. The filler 2 is then injected into the receiving cavity through the perforated dovetail plate 4, allowing the filler 2 to be directly injected into the receiving cavity from the side of the wall, eliminating the need for a dedicated pouring port or disassembly of the panel, significantly simplifying the process. The construction process has been simplified. When only one injection hole 41 is set on a dovetail plate, the perforated dovetail plate 4 serves as the filling inlet, while the non-perforated dovetail plate 3 serves as the closed side. On the one hand, this ensures that the filler 2 can flow in a directional manner and fill the entire cavity in an orderly manner during the injection process. On the other hand, the non-perforated dovetail plate 3 can prevent the slurry from leaking out, reducing material waste and on-site pollution. The uniform arrangement of multiple injection holes 41 allows the filler 2 to be injected from multiple points simultaneously or in stages, effectively shortening the filling path and avoiding problems such as excessive filling distance, uneven slurry flow, or local voids caused by single-point injection. This ensures that the filler 2 is evenly distributed, dense, and full in the cavity.

[0026] It should be noted that, in order to avoid leakage during the pouring process due to multiple injection holes 41, the injection holes 41 can be temporarily sealed with a sealing body after one layer is poured. Then, the pouring continues to the next layer, and subsequent injection holes 41 are sealed in sequence. The sealing body can be one or more of the following: rubber plug, conical wooden plug, quick-sealing agent, adhesive tape, or removable plastic cover. This not only retains the advantages of uniform filling, short path, and less likelihood of voids brought by multi-point injection, but also effectively prevents slurry leakage by temporarily sealing, reducing material waste and on-site pollution. At the same time, the sealing body can be removed and recycled after the filler 2 has initially set, or left in the injection hole 41 as a permanent sealant to further ensure the integrity and sealing of the wall.

[0027] refer to Figures 1-3 As a preferred embodiment, the filler 2 includes a keel filler 22 formed by casting through the injection hole 41 and a gap partition 21. The keel filler 22 is used to fill the cavity inside the light steel keel frame 1, and the gap partition 21 is used to fill the cavity between the dovetail plate and the light steel keel frame 1.

[0028] refer to Figure 1 As one implementation method, the infill body 2 can also be set without pouring. In this case, the infill body 2 includes a keel infill plate set between the frame 11 and the horizontal and vertical ribs 13 and 12, and between the horizontal and vertical ribs 13 and 12, as well as a gap partition set between the keel infill plate and the dovetail plate. The side of the gap partition that is attached to the dovetail plate has a dovetail groove that matches the dovetail groove of the dovetail plate. This eliminates the need for on-site wet pouring, avoiding the problems of long curing period, easy shrinkage and cracking, and great influence of ambient temperature on the grout, which significantly improves construction efficiency. It is especially suitable for prefabricated buildings in cold seasons or with tight schedules. The side of the gap partition that is attached to the dovetail plate has a dovetail groove that matches the dovetail groove of the dovetail plate. Through the embedded interlocking of the dovetail groove and the dovetail groove, not only is the precise positioning and mechanical locking between the gap partition and the dovetail plate achieved, preventing the partition from loosening or slipping during use, but also the integrity between the infill body 2 and the dovetail plate is enhanced, effectively transmitting shear force and suppressing wall delamination.

[0029] It should be noted that the keel filling board is made of high-density fiber cement board to ensure strength, and the gap partition is made of polyurethane or phenolic foam board to ensure thermal insulation and sound insulation. The keel filling board and the gap partition are made of different performance boards to achieve an optimized combination of structural load-bearing and functional layering. This dry filling system has the advantages of quick construction, controllable quality, and easy disassembly and maintenance.

[0030] refer to Figure 4 As one implementation method, a filling injection gap block 8 is provided between the light steel keel frame 1 and at least one dovetail plate. The filling injection gap block 8 is used to connect the light steel keel frame 1 and the dovetail plate. On the one hand, the gap block acts as a spacing member, separating the dovetail plate and the light steel keel frame 1 at a preset distance to form a uniform and continuous injection channel, ensuring that the filler 2 can flow smoothly into and fill all the cavities between the dovetail plate and the keel, avoiding filling blind spots caused by the dovetail plate directly adhering to the keel; on the other hand, the gap block acts as a connecting member, reliably fixing the dovetail plate to the light steel keel frame 1 with screws or clips, enhancing the tensile and shear strength of the wall in the thickness direction, and preventing the panel from warping or delaminating when subjected to impact or temperature changes.

[0031] It should be noted that the gap spacers can be made of elastic rubber or plastic to reduce vibration and eliminate installation tolerances. Alternatively, thermal insulation materials with low thermal conductivity can be used to block the thermal bridge effect between the keel and the dovetail plate, further improving the thermal insulation performance of the wall.

[0032] When only one dovetail plate and the light steel keel frame 1 are provided with a filling injection gap block 8, the filling injection gap block 8 is provided between the perforated dovetail plate 4 and the light steel keel frame 1. At this time, the other dovetail plate is a non-perforated dovetail plate 3. The perforated dovetail plate 4 maintains a predetermined distance from the keel frame due to the presence of the gap block, forming a continuous and unobstructed injection channel. After the filler 2 enters from the injection hole 41 of the perforated dovetail plate 4, it can flow evenly from top to bottom or from bottom to top along the channel, fully filling the entire cavity. The non-perforated dovetail plate 3 is directly attached to the keel frame, which acts as a closed end to prevent the filler 2 from leaking out from the other side, ensuring that the filling direction is controllable and the filling is dense. The gap block is provided only on one side, which reduces the amount of spacer used and the amount of installation work. The non-perforated dovetail plate 3 is directly fixed to the keel without additional positioning and adjustment, which improves construction efficiency.

[0033] refer to Figure 4 As one implementation method, the filling and injection gap pad 8 includes a block body 81, on which a slot 82 and a fixing hole 83 are provided. The light steel keel frame 1 has pre-fabricated protrusions that engage with the slot 82. The fixing hole 83 is connected to the dovetail plate via a fastener, achieving tool-free quick snap-fit ​​positioning between the pad and the keel frame, ensuring that the pad does not shift or deflect during installation. Simultaneously, the fastener connects the dovetail plate, the pad, and the keel frame as a single unit, forming a triple locking system (keel frame - pad - dovetail plate), which differs from the traditional method of directly fixing the dovetail plate to the keel using screws. Compared to other methods, this design utilizes pads as intermediate force-transmitting components, increasing the load-bearing area and preventing local cracking or denting of the dovetail plate at screw connections due to stress concentration. Simultaneously, the cooperation between the slot 82 and the protrusion can withstand the lateral shear force transmitted by the dovetail plate, significantly improving the shear resistance and overall stability of the wall under horizontal loads (such as wind pressure and earthquake action). Furthermore, the presence of pads ensures a precise gap between the dovetail plate and the keel frame, providing a smooth injection channel for the filler 2 and avoiding the thermal bridging effect and electrochemical corrosion that may occur when the dovetail plate directly contacts the metal keel.

[0034] It should be noted that the fastener can be one of the following: self-tapping screw, rivet, or plastic expansion bolt.

[0035] refer to Figures 1-3As one implementation method, an intermediate layer is set between the phosphogypsum leveling layer 5 and the mortar spraying layer 6. The intermediate layer is either alkali-resistant fiberglass mesh or a cement-based coarse leveling layer. When the alkali-resistant fiberglass mesh is used as the intermediate layer, it can be embedded in the surface of the phosphogypsum leveling layer 5 to form a crack-resistant reinforcing skeleton, effectively dispersing the tensile stress generated by the shrinkage of the mortar spraying layer 6 and preventing the propagation of micro-cracks. At the same time, the rough surface of the mesh significantly improves the mechanical anchoring force between the two layers, avoiding delamination and hollowing. When the cement-based coarse leveling layer is used as the intermediate layer, its sand content is coarse... The aggregate surface forms an uneven, rough interface, which can correct the local flatness deviation of the phosphogypsum leveling layer 5 and provide a high-adhesion substrate for the outer mortar spraying layer 6. At the same time, the cement-based material and the phosphogypsum leveling layer 5 form a good chemical compatibility interface, reducing interface cracking caused by the difference in material shrinkage rate. Therefore, the setting of the intermediate layer solves the inherent defects of the smooth surface and insufficient adhesion of the phosphogypsum leveling layer 5, and significantly improves the integrity, crack resistance and durability of the wall without increasing the thickness too much.

[0036] refer to Figures 1-3 As one implementation method, vertical ribs 7 are set between the phosphogypsum leveling layer 5 and the mortar spraying layer 6, and multiple ribs are set parallel to each other. The vertical ribs 7 serve as skeleton reinforcement components, extending continuously along the height of the wall, which can effectively bear and transfer vertical loads, suppress vertical shrinkage cracks caused by the self-weight of the mortar spraying layer 6, and at the same time distribute the surface load of the wall to the internal dovetail plate and keel frame, avoiding cracking or falling off caused by local stress concentration. On the other hand, the vertical ribs 7 serve as thickness control and leveling guides. During construction, the mortar spraying layer 6 can be scraped or sprayed according to the elevation of the top surface of the ribs to ensure the overall flatness of the wall surface. This is especially suitable for the construction accuracy control of high-height walls. The setting of multiple parallel vertical ribs 7 also forms multiple vertically distributed strip-shaped cavities or embedded channels between the phosphogypsum leveling layer 5 and the mortar spraying layer 6. The mortar spraying layer 6 material can be embedded in the gaps between the ribs to form a mechanical interlocking structure, which significantly improves the bonding strength and anti-slip ability between the two layers. Compared with traditional single-interface treatment methods, this vertical rib 7 structure has multiple functions such as reinforcement, leveling, crack resistance, and anchoring, and is particularly suitable for high-rise buildings or prefabricated wall projects with high requirements for wall verticality.

[0037] refer to Figures 1-3As one implementation method, a conduit assembly 9 is installed between the dovetail plate and the phosphogypsum leveling layer 5. The conduit assembly 9 includes a conduit and a junction box, which is set on the outer surface of the dovetail plate and is positioned and installed before the phosphogypsum leveling layer 5 is constructed. The phosphogypsum leveling layer 5 is directly sprayed or coated onto the surface of the dovetail plate and the conduit assembly 9, completely enclosing the pipeline inside the leveling layer. There is no need to groove and bury the pipeline again after the wall is formed, which avoids the damage to the structure of the dovetail plate and the infill 2 caused by grooving, and also reduces construction dust and noise. Meanwhile, the buried conduit box assembly 9 achieves stable positioning through the dovetail groove structure on the surface of the dovetail plate, preventing displacement or floating during the construction of the phosphogypsum leveling layer 5. A removable sealing cap can be pre-installed at the opening of the junction box to prevent phosphogypsum slurry from entering the box. After the phosphogypsum leveling layer 5 hardens, the sealing cap can be removed for wiring and panel installation. This structure realizes the synchronous construction and integrated construction of the wall structure and pipeline system, which not only ensures the structural integrity and thermal insulation and sound insulation performance of the wall, but also greatly improves the construction efficiency of electrical wiring and the convenience of later maintenance. It is particularly suitable for the wall system of prefabricated buildings and fine-decorated residences.

[0038] This invention also discloses a construction method for a thermal insulation dovetail plate phosphogypsum sprayed wall, which includes the following steps: 1. When the light steel keel frame 1 has a perforated dovetail plate 4 on one side and a non-perforated dovetail plate 3 on the other side (or both sides of the light steel keel frame 1 have perforated dovetail plates 4): Step 1: Positioning and Laying Out Lines Clean up the debris on the base layer according to the design drawings and on-site construction requirements. Use an infrared level to locate the center line or edge line of the wall. Determine the installation position of the light steel keel frame 1 and the non-perforated dovetail plate 3 according to the wall thickness. Mark control lines on the ground, top surface and adjacent walls. Step 2: Install the light steel keel frame 1 and the non-perforated dovetail plate 3 The light steel keel frame 1 is fixed to the structural beams, floor slabs and adjacent walls with nails, bolts or corner fittings to ensure the verticality and stability of the frame; a non-perforated dovetail plate 3 is fixed on one side of the light steel keel frame 1 and connected with self-tapping screws or rivets, with staggered joints and the dovetail grooves kept horizontal.

[0039] Step 3: Install the perforated dovetail plate 4 and the filling and injection gap shim 8 Install the filling and injection gap pad 8 on the other side of the light steel keel frame 1, and fix the filling and injection gap pad 8 to the keel by snapping or screwing it; then fix the perforated dovetail plate 4 to the filling and injection gap pad 8, with the injection hole 41 on the perforated dovetail plate 4 facing outward to facilitate subsequent filling construction, and form a receiving cavity between the non-perforated dovetail plate 3 and the perforated dovetail plate 4.

[0040] Step 4: Fill with foam filler injection body The filler material (preferably thermal insulation foam material) is injected into the cavity through several injection holes 41 evenly distributed on the perforated dovetail plate 4. The injection is carried out in layers, from bottom to top, hole by hole. After each layer is injected, the injected injection hole 41 is temporarily sealed with a sealing body to prevent material leakage. After the thermal insulation foam material is cured, it forms a foamed filler injection body, which is tightly combined with the light steel keel frame 1 and the dovetail plates on both sides.

[0041] Step 5: Pre-embed the conduit box assembly 9 On the outer surfaces of the non-perforated dovetail plate 3 and the perforated dovetail plate 4, conduits and junction boxes are arranged according to the electrical and water-electricity design drawings. The conduit box assembly 9 is fixed to the surface of the dovetail plate by screws or clips. A removable sealing cap is installed at the opening of the junction box for sealing and protection to prevent subsequent sprayed grout from entering.

[0042] Step 6: Spraying phosphogypsum leveling layer 5 First, the phosphogypsum slurry is mixed according to the specified ratio to ensure good fluidity and adhesion. The mixed phosphogypsum slurry is then sprayed onto the surfaces of the non-porous dovetail plate 3 and the perforated dovetail plate 4, allowing the slurry to fully embed into the dovetail grooves and form a mechanical interlock. The trough section is sprayed along the groove to ensure that the bottom of the dovetail groove is filled. Then, a horizontal serpentine spraying method is used to evenly cover the slurry, spraying it to a position approximately 1 cm away from the designed thickness of the wall. Finally, a notched trowel is used for preliminary leveling to form the phosphogypsum leveling layer 5.

[0043] Step 7: Constructing the mortar spraying layer 6 After the phosphogypsum leveling layer 5 has initially set, screeding is carried out: vertical screeds 7 are installed on the surface of the phosphogypsum leveling layer 5, with a spacing of no more than 1.5 meters, to control the verticality, flatness and thickness of the wall. After the screeds are installed, the surface mortar is sprayed to cover the screeds and the surface of the phosphogypsum leveling layer 5. Then, a scraper is used to scrape the top surface of the screeds a second time to make the surface of the mortar sprayed layer 6 flat and dense.

[0044] Or set an intermediate layer: After the phosphogypsum leveling layer 5 has initially set, an intermediate layer is applied to its surface. The intermediate layer is either an alkali-resistant fiberglass mesh or a cement-based coarse leveling layer. When using alkali-resistant fiberglass mesh: cut the mesh to the appropriate size and lay it on the surface of the phosphogypsum leveling layer 5. The overlap width between the meshes should not be less than 50mm. Use an interface agent or a thin layer of phosphogypsum slurry to bond and fix it, ensuring that the mesh is flat and wrinkle-free, as a crack-resistant reinforcement layer. When using a cement-based coarse leveling layer: mix cement, medium sand, and adhesive powder in a weight ratio of 1:2:0.1, add water and stir to form a coarse leveling slurry. Apply the slurry to the surface of the phosphogypsum leveling layer 5 with a thickness of 3mm to 8mm. Then, use a roughening roller or a sawtooth trowel to treat the surface to form a rough texture with a depth of 0.5 to 1.0mm as an adhesion reinforcement layer. Then, a scraper is used to level the surface of the intermediate layer a second time, so that the surface of the mortar sprayed layer 6 is flat and dense.

[0045] Step 8: Finishing and cleaning the edges Corner fittings and alkali-resistant fiberglass mesh were added to the corners of the walls and the openings of doors and windows to reinforce them and prevent cracking. The construction site was then cleaned and the wall construction was completed.

[0046] Step 9: Waterproofing layer construction After the mortar spraying layer 6 is completely dry, spray or roll on waterproof material (such as polymer cement waterproof coating, polyurethane waterproof coating, etc.) to form a waterproof layer with a thickness controlled between 0.5mm and 2.0mm, which is especially suitable for exterior walls and damp environments.

[0047] Step 10: Surface Decoration Apply putty, paint, wallpaper, or tile finishes according to the design requirements.

[0048] II. When both sides of the light steel keel frame 1 are non-perforated dovetail plates 3, the filling material 2 consists of keel filling plates and gap partitions: Step 1: Positioning and Laying Out Lines Clean up debris on the base layer according to the design drawings and on-site construction requirements. Use an infrared level to locate the center line or edge line of the wall. Determine the installation position of the light steel keel frame 1 and the two non-perforated dovetail plates 3 according to the wall thickness. Mark control lines on the ground, top surface and adjacent walls.

[0049] Step 2: Install the light steel keel frame 1 The light steel keel frame 1 is fixed to the structural beams, floor slabs and adjacent walls by means of nails, bolts or corner fittings to ensure the verticality and stability of the frame. The light steel keel frame 1 includes a frame 11 and horizontal and vertical ribs 13 and 12 that are perpendicular to each other and set in the frame 11 to form a grid-like support structure.

[0050] Step 3: Install the keel filler plate Within the grid-like cavities of the light steel keel frame 1, keel filling plates are embedded and installed. The dimensions of the keel filling plates match each grid cavity, and they are respectively positioned between the frame 11 and the horizontal ribs 13 and vertical ribs 12, as well as between the horizontal ribs 13 and vertical ribs 12. The keel filling plates can be made of high-density fiber cement board, gypsum board, or extruded polystyrene board, and are fixed to the keel by adhesive or clips to ensure dense filling without loosening.

[0051] Step 4: Install the gap partition On the outside of the keel filling plate (i.e. the side near the dovetail plate), during installation, align the dovetail groove of the gap partition with the dovetail groove of the non-perforated dovetail plate 3, slide it into the groove, and form a mechanical interlock. The gap partition can be made of polyurethane foam board, phenolic foam board, rock wool board or glass wool board, and its thickness matches the gap between the dovetail plate and the keel.

[0052] Step 5: Secure the dovetail plate (without holes) 3 The dovetail plates 3 without holes on both sides are fixed to the two sides of the light steel keel frame 1. The dovetail plates are directly connected to the light steel keel frame 1 with self-tapping screws. At the same time, the dovetail groove on its back is engaged with the dovetail groove of the installed gap partition. The screws should penetrate the dovetail plate 3 without holes and the gap partition before being fixed to the light steel keel frame 1 to ensure that the three-layer structure (dovetail plate-gap partition-keel) is firmly connected, the plate joints are staggered, and the direction of the dovetail groove is kept horizontal.

[0053] Step 6: Pre-embed the conduit box assembly 9 On the outer surface of the dovetail plates on both sides, conduits and junction boxes are arranged according to the electrical and water and electricity design drawings. The conduit box assembly 9 is fixed to the surface of the dovetail plate by screws or clips. A removable sealing cover is installed at the opening of the junction box for sealing and protection to prevent subsequent sprayed grout from entering. The conduits can be pre-grooved or perforated in the keel filling plate or gap partition to ensure the continuity of the pipeline.

[0054] Step 7: Apply phosphogypsum leveling layer First, the phosphogypsum slurry is mixed according to the specified ratio to ensure good fluidity and adhesion. The mixed phosphogypsum slurry is then sprayed onto the surface of the non-porous dovetail plate on both sides, allowing the slurry to fully embed into the dovetail groove and form a mechanical interlock. The trough section is sprayed first to ensure that the bottom of the dovetail groove is filled. Then, a horizontal serpentine spraying method is used to evenly cover the slurry, spraying it to a position where a certain space (about 1 cm) is reserved from the designed thickness of the wall. Finally, a notched trowel is used for preliminary leveling to form a phosphogypsum leveling layer.

[0055] Step 8: Constructing the mortar spraying layer 6 After the phosphogypsum leveling layer 5 has initially set, screeding is carried out: vertical screeds 7 are installed on the surface of the phosphogypsum leveling layer 5, with a spacing of no more than 1.5 meters, to control the verticality, flatness and thickness of the wall. After the screeds are installed, the surface mortar is sprayed to cover the screeds and the surface of the phosphogypsum leveling layer 5. Then, a scraper is used to scrape the top surface of the screeds a second time to make the surface of the mortar sprayed layer 6 flat and dense.

[0056] Or set an intermediate layer: After the phosphogypsum leveling layer 5 has initially set, an intermediate layer is applied to its surface. The intermediate layer is either an alkali-resistant fiberglass mesh or a cement-based coarse leveling layer. When using alkali-resistant fiberglass mesh: cut the mesh to the appropriate size and lay it on the surface of the phosphogypsum leveling layer 5. The overlap width between the meshes should not be less than 50mm. Use an interface agent or a thin layer of phosphogypsum slurry to bond and fix it, ensuring that the mesh is flat and wrinkle-free, as a crack-resistant reinforcement layer. When using a cement-based coarse leveling layer: mix cement, medium sand, and adhesive powder in a weight ratio of 1:2:0.1, add water and stir to form a coarse leveling slurry. Apply the slurry to the surface of the phosphogypsum leveling layer 5 with a thickness of 3mm to 8mm. Then, use a roughening roller or a sawtooth trowel to treat the surface to form a rough texture with a depth of 0.5 to 1.0mm as an adhesion reinforcement layer. Then, a scraper is used to level the surface of the intermediate layer a second time, so that the surface of the mortar sprayed layer 6 is flat and dense.

[0057] Step 9: Finishing and cleaning the edges Corner fittings and alkali-resistant fiberglass mesh were added to the corners of the walls and the openings of doors and windows to reinforce them and prevent cracking. The construction site was then cleaned and the wall construction was completed.

[0058] Step 10: Waterproofing layer construction After the mortar spraying layer 6 is completely dry, spray or roll on waterproof material (such as polymer cement waterproof coating, polyurethane waterproof coating, etc.) to form a waterproof layer with a thickness controlled between 0.5mm and 2.0mm, which is especially suitable for exterior walls and damp environments.

[0059] Step 11: Surface decoration.

[0060] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A thermal insulation dovetail phosphogypsum sprayed wall, characterized in that, The light steel keel frame (1) includes dovetail plates on both sides of the light steel keel frame (1), a phosphogypsum leveling layer (5) and a mortar spraying layer (6) arranged sequentially on the side of the dovetail plates away from the light steel keel frame (1). A receiving cavity is formed between the light steel keel frame (1) and the dovetail plates on both sides of the light steel keel frame (1), and a filler (2) is provided in the receiving cavity.

2. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 2, characterized in that, The light steel keel frame (1) includes a frame frame (11), horizontal ribs (13) and vertical ribs (12) arranged vertically and intersectingly within the frame frame (11).

3. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 2, characterized in that, At least one of the dovetail plates is provided with an injection hole (41), which is in communication with the receiving cavity.

4. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 3, characterized in that, The filler (2) includes a keel filler (22) formed by casting through an injection hole (41) and a gap partition (21). The keel filler (22) is used to fill the cavity inside the light steel keel frame (1), and the gap partition (21) is used to fill the cavity between the dovetail plate and the light steel keel frame (1).

5. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 3, characterized in that, The filler (2) includes a keel filler plate disposed between the frame (11) and the horizontal ribs (13) and the vertical ribs (12), and between the horizontal ribs (13) and the vertical ribs (12), and a gap partition disposed between the keel filler plate and the dovetail plate. The gap partition has a dovetail groove that matches the dovetail groove of the dovetail plate on one side.

6. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 1, characterized in that, A filling and injection gap pad (8) is provided between the light steel keel frame (1) and at least one of the dovetail plates, and the filling and injection gap pad (8) is used to connect the light steel keel frame (1) and the dovetail plates.

7. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 6, characterized in that, The filling injection gap pad (8) includes a block body (81), a slot (82) opened on the block body (81), and a fixing hole (83) provided on the block body (81). The light steel keel frame (1) has a protrusion that cooperates with the slot (82). The fixing hole (83) is connected to the dovetail plate through a fastener.

8. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 1, characterized in that, Vertical ribs (7) are provided between the phosphogypsum leveling layer (5) and the mortar spraying layer (6).

9. The thermal insulation dovetail plate phosphogypsum sprayed wall according to claim 1, characterized in that, A buried conduit assembly (9) is provided between the dovetail plate and the phosphogypsum leveling layer (5).

10. A construction method for a thermally insulating dovetail plate phosphogypsum sprayed wall, using the thermally insulating dovetail plate phosphogypsum sprayed wall as described in any one of claims 1-9, characterized in that, Includes the following steps: Fix the light steel keel frame (1); Install the dovetail plate, the filler (2), the phosphogypsum leveling layer (5), and the mortar spraying layer (6).

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