Phosphogypsum self-leveling floor construction structure and construction method for crack positioning induction reinforcement

Abstract

The ardealite self-leveling floor construction structure comprises an interface agent layer coated on the surface of a base layer and an ardealite layer poured on the upper surface of the interface agent layer, and is characterized by further comprising a stress induction framework which is fixedly arranged on the upper surface of the interface agent layer and is embedded by the ardealite layer, the flexible micro-compensation structure layer is sprayed on the upper surface of the phosphogypsum layer; the flexible micro-compensation structure layer comprises a fiber net layer embedded into the surface of the ardealite layer after the ardealite layer is initially set, and a polymer coating sprayed on the surface of the ardealite layer after the ardealite layer is cured. The ardealite self-leveling floor solves the technical problems of random occurrence of cracks, control means failure, process incompatibility and the like in large-area construction of the existing ardealite self-leveling floor.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and in particular relates to a phosphogypsum self-leveling floor construction structure and a construction method for crack positioning and induction reinforcement. Background Art

[0002] With the growing adoption of green building concepts and the continuous improvement of building industrialization, traditional cement-based flooring materials face challenges such as poor environmental performance, high energy consumption, and difficulty controlling cracks. The resource utilization of phosphogypsum, a byproduct of the phosphate fertilizer industry, has become a hot research topic in the building materials industry. Modified phosphogypsum exhibits excellent strength development and plasticity, demonstrating excellent flowability, self-leveling properties, and sustainable performance in flooring materials. It is particularly suitable for self-leveling applications in large-scale floors, industrial plants, underground garages, and other locations.

[0003] However, in practical applications, phosphogypsum self-leveling floors still face a key engineering challenge: cracks easily form during the hardening process due to factors such as shrinkage, temperature differences between the inside and outside of the floor, material hydration reactions, and concentrated loads. These cracks are often randomly distributed and unpredictable, seriously affecting the floor's appearance, functionality, and structural integrity.

[0004] Common crack control methods in the industry include post-processing mechanical cutting, laying steel mesh, and setting expansion joints. Although these measures can alleviate stress concentration to a certain extent, they have the following major problems:

[0005] 1) Incompatible with self-leveling process: Traditional cutting construction is often carried out after the initial or final setting of the floor, requiring secondary construction to destroy the integrity, which is contrary to the process logic of "self-leveling-one-time forming".

[0006] 2) Uncertain crack induction effect: It is difficult to accurately grasp the stress direction after slitting, and it is difficult to achieve effective crack guidance at key locations, resulting in random crack locations and uncontrollable shapes.

[0007] 3) Complex construction and rising costs: Steps such as laying steel mesh and seam marking increase construction complexity, cost and duration, reducing overall efficiency.

[0008] 4) High cost of later maintenance: Once cracks are formed, they not only affect the appearance, but also easily cause problems such as structural water leakage, wear and tear, and require later repair and maintenance. Summary of the Invention

[0009] In view of the technical difficulties in the existing phosphogypsum self-leveling floor in large-scale construction, such as random crack occurrence, failure of control measures, and process incompatibility, the present invention proposes a phosphogypsum self-leveling floor construction structure and construction method with crack positioning and induction reinforcement.

[0010] The present invention is achieved through the following technical solutions.

[0011] In a first aspect, the present invention provides a phosphogypsum self-leveling floor construction structure for crack positioning and induction reinforcement, comprising an interface agent layer coated on the surface of a base layer, and a phosphogypsum layer cast on the upper surface of the interface agent layer, characterized in that it also comprises: a stress-inducing skeleton fixedly arranged on the upper surface of the interface agent layer and embedded in the phosphogypsum layer, and a flexible micro-compensation structure layer sprayed on the upper surface of the phosphogypsum layer; the flexible micro-compensation structure layer comprises a fiber mesh layer embedded in the surface of the phosphogypsum layer after the phosphogypsum layer is initially set, and a polymer coating sprayed on the surface of the phosphogypsum layer after the phosphogypsum layer is cured;

[0012] The stress-inducing skeleton is assembled in a grid shape by stress-inducing strips, and the stress-inducing strips include a grouting tube, a base strip, a functional cavity arranged inside the base strip along the length direction of the base strip, a plurality of grouting holes evenly arranged at the center position of the top of the base strip along the length direction of the base strip, and steel nails and sealing wax arranged in a one-to-one correspondence with the plurality of grouting holes; the bottom of the grouting hole is connected with the functional cavity, and the top is connected with the outside of the base strip; the grouting tube seals and passes through the side wall of the base strip, and one end is connected with the functional cavity, and the other end passes through the phosphogypsum layer and extends to the outside of the floor; the length of the steel nail is greater than the thickness of the floor, and after passing through the grouting hole and the functional cavity, the steel nail is nailed into the bottom of the base strip and anchored in the base layer; the sealing wax fills the top of the gap between the grouting hole and the steel nail.

[0013] Preferably, the present invention further comprises: a steel mesh layer, wherein the steel mesh layer is arranged in the phosphogypsum layer, and the steel mesh layer is connected to the stress inducing strip.

[0014] Preferably, the phosphogypsum layer includes a phosphogypsum upper casting layer and a phosphogypsum lower casting layer sequentially arranged from top to bottom, and the steel mesh layer is arranged at the interface between the phosphogypsum upper casting layer and the phosphogypsum lower casting layer.

[0015] Preferably, the distance between the top of the phosphogypsum lower pouring layer and the upper end of the grouting hole is 0.5-1 cm.

[0016] Preferably, the upper portion of the steel nail is buried in the phosphogypsum layer, and crack reinforcement steel wires are provided around the nail.

[0017] Preferably, the stress inducing strip further comprises a plurality of deformation grooves arranged inside the base strip along the length direction of the base strip, and the plurality of deformation grooves are distributed around the functional cavity and communicated with the functional cavity.

[0018] Preferably, the stress inducing strip further comprises a plurality of stress inducing ribs arranged along the length direction of the base strip, the plurality of stress inducing ribs being arranged in one-to-one correspondence with the deformation grooves, the stress inducing ribs being sealed and passing through the base strip, with one end extending to the outside of the base strip and the other end extending into the deformation groove.

[0019] Preferably, the fiber mesh layer is a polypropylene fiber mesh or a glass fiber cloth, and the polymer coating is sprayed with an epoxy emulsion or an elastic acrylic modifier, with a spraying thickness of 0.5 to 1.0 mm.

[0020] Preferably, the cross-sections of the base strip and the functional cavity are semicircular, the length of the base strip is 1.5-2.0 m, and the diameter of the functional cavity is 0.5-0.6 times the diameter of the base strip.

[0021] In a second aspect, the present invention provides a method for constructing a crack-positioning, inducing, and reinforcing phosphogypsum self-leveling floor, which is characterized by comprising the following steps:

[0022] S1. Base layer processing

[0023] Applying an interface agent layer on the surface of the base layer;

[0024] S2. Install stress-inducing frame

[0025] Assemble and lay the stress-inducing strips in a grid pattern on the surface of the interface agent layer. Drive steel nails through the grouting holes and functional cavities and into the bottom of the inducing strips until they are anchored into the base layer. Ensure that the top of the steel nails is higher than the designed elevation of the floor. Fill the top of the gap between the grouting holes and the steel nails with sealing wax to seal the grouting holes, thus completing the installation and fixation of the stress-inducing skeleton.

[0026] S3. Construction of phosphogypsum layer

[0027] A phosphogypsum layer is constructed on the upper surface of the interface agent layer, and a caulking pipe is pulled so that one end thereof passes through the phosphogypsum layer and extends to the outside, so that the stress-inducing skeleton is embedded in the phosphogypsum layer;

[0028] S4. Melting wax and constructing fiber mesh layer

[0029] After the phosphogypsum layer has initially solidified, the top of the steel nail is heated to melt the sealing wax through heat conduction from the nail. The nail is then driven completely into the phosphogypsum layer. A fiber mesh layer is then laid to embed it into the surface of the phosphogypsum layer.

[0030] S5. Crack location, induction and reinforcement

[0031] After the phosphogypsum layer is finally set, a polymer coating is sprayed on the surface of the phosphogypsum layer; after the phosphogypsum layer is solidified, cracks are formed in the phosphogypsum layer above the stress-inducing strips through positioning induction, and grouting is performed through the grouting pipe to fill the deformation grooves, functional cavities and grouting holes and enter the cracks.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. Accurate crack guidance and significant control effect

[0034] By pre-embedding a stress-inducing framework within the floor, this invention effectively guides internal stress to a predetermined path, making crack locations controllable and directable, thus avoiding the structural damage and aesthetic impact caused by traditional random cracking. This crack-guiding mechanism ensures a controlled number of cracks and regularized morphology, significantly improving the overall quality of the floor.

[0035] 2. Improved durability and stability

[0036] In the present invention, by arranging a functional cavity inside the base strip, not only can the induced control of floor cracks be achieved, but also by cooperating with the functional cavity through steel nails, grouting pipes, grouting holes, sealing paraffin and the functional cavity, the cracks guided by positioning can be grouting reinforced, so as to improve the overall durability and stability of the phosphogypsum self-leveling floor; in addition, after the grouting reinforcement is completed, the slurry fills the deformation groove, the functional cavity and the grouting hole, and the stress inducing strip is transformed into a dense body, which no longer has the ability to absorb stress. At this time, the grid-like stress inducing skeleton can serve as a permanent bottom support structure to reinforce the phosphogypsum layer as a whole, further improving the overall durability and stability of the phosphogypsum self-leveling floor.

[0037] 3. Simple construction and high efficiency

[0038] The method of the present invention is fully compatible with the self-leveling thick paving construction process, does not require subsequent complex processes such as cutting and reinforcement, has a short construction period, simplifies the on-site operation process, is suitable for industrialized and mechanized large-area paving, and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is the main view of the stress-inducing strip;

[0040] Figure 2 is a top view of the stress-inducing strip;

[0041] Figure 3 Schematic diagram of the main structure of the stress-inducing strip;

[0042] Figure 4 for Figure 1 Cross-sectional view at AA in the middle;

[0043] Figure 5 for Figure 1 Cross-sectional view at the middle BB;

[0044] Figure 6 Schematic diagram of the assembly of the stress-induced skeleton;

[0045] Figure 7 This is the distribution map of floor cracks after positioning and induction;

[0046] Figure 8 Schematic diagram of the steps for installing the stress-inducing skeleton;

[0047] Figure 9 Schematic diagram of the steps of melting wax and constructing the fiber mesh layer in Example 2;

[0048] Figure 10 Schematic diagram of the steps of melting wax and constructing the fiber mesh layer in Example 3;

[0049] Figure 11 Schematic diagram of the phosphogypsum layer after solidification in the crack location induction and reinforcement steps;

[0050] Figure 12 This is a schematic diagram of the crack location, induction and reinforcement steps after grouting reinforcement;

[0051] The meanings of the symbols in the above figure are: base layer 1, interface agent layer 2, stress inducing strip 3, base strip 301, functional cavity 302, grouting hole 303, steel nail 304, crack reinforcement wire 3041, sealing paraffin 305, grouting pipe 306, deformation groove 307, stress inducing rib 308, phosphogypsum layer 4, phosphogypsum upper pouring layer 401, phosphogypsum lower pouring layer 402, steel mesh layer 5, flexible micro-compensation structure layer 6, crack 7, stress inducing skeleton 8, flamethrower 9, floor 10. DETAILED DESCRIPTION

[0052] The present invention will be further described below in the form of specific embodiments in conjunction with the accompanying drawings. It should be noted that the following embodiments are merely illustrative of the present invention in the form of examples, but the scope of protection of the present invention is not limited thereto. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] Example 1

[0054] This embodiment provides a crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure. Figures 1 to 12 , comprising an interface agent layer 2 coated on the surface of a base layer 1, a phosphogypsum layer 4 cast on the upper surface of the interface agent layer 2, a stress-inducing skeleton 8 fixedly arranged on the upper surface of the interface agent layer 2 and embedded in the phosphogypsum layer 4, and a flexible micro-compensation structure layer 6 sprayed on the upper surface of the phosphogypsum layer 4;

[0055] The flexible micro-compensation structure layer 6 includes a fiber mesh layer 601 embedded in the surface of the phosphogypsum layer 4 after the phosphogypsum layer 4 is initially set, and a polymer coating 602 sprayed on the surface of the phosphogypsum layer 4 after the phosphogypsum layer 4 is cured;

[0056] The stress inducing skeleton 8 is assembled in a grid shape by stress inducing strips 3. The stress inducing strips 3 include a base strip 301, a functional cavity 302 arranged inside the base strip 301 along the length direction of the base strip 301, a plurality of caulking holes 303 uniformly arranged at the top center position of the base strip 301 along the length direction of the base strip 301, steel nails 304 and sealing paraffin 305 arranged in one-to-one correspondence with the plurality of caulking holes 303, and a caulking tube 306; the bottom of the caulking hole 302 is connected to the functional cavity 30 2, and the top is connected to the outside of the base strip 301. The caulking tube 306 seals and penetrates the side wall of the base strip 301, one end of which is connected to the functional cavity 302, and the other end passes through the phosphogypsum layer 4 and extends to the outside of the floor. The length of the steel nail 304 is greater than the thickness of the floor. After passing through the caulking hole 303 and the functional cavity 302, the steel nail 304 is nailed into the bottom of the base strip 301 and anchored in the base layer 1. The sealing paraffin 305 fills the top of the gap between the caulking hole 303 and the steel nail 304.

[0057] In this embodiment, the base strip 301 is made of antiseptic wood or corrosion-resistant plastic, and its cross-sectional shape is semicircular, and in other cases it can also be trapezoidal or triangular; the functional cavity 302 is a strip-shaped channel opened inside the base strip 301 along the length direction and blocked at both ends, and its cross-sectional shape is semicircular, and in other cases it can also be circular, triangular or square; the caulking pipe 306 is an ordinary plastic hose; the steel nail 304 is an ordinary cement steel nail; the interface agent layer 2 is formed by applying a commonly used interface agent; the stress-inducing skeleton 8 is a square grid-shaped skeleton structure assembled by the stress-inducing strips 3, and in other cases the stress-inducing skeleton 8 can also be a diamond or rectangular grid-shaped skeleton structure; in addition, the stress-inducing skeleton 8 can also be set separately in different areas according to modularization, and each stress-inducing skeleton 8 can flexibly adjust its grid shape and grid size according to the load distribution, shape complexity and stress concentration location of the area;

[0058] In the present invention, since the functional cavity 302 is provided inside the base strip 301, the stress inducing strip 3 has space to absorb stress inward and generate deformation. Therefore, after the construction of the phosphogypsum self-leveling floor is completed, when the phosphogypsum layer 4 generates shrinkage or concentrated stress during the hardening process, the stress will be concentrated on the stress inducing strip 3 first, prompting cracks to form first, so as to achieve pre-positioning guidance of the cracks, thereby avoiding the random expansion of the cracks to other parts of the floor. The flexible micro-compensation structure layer 6 provided on the surface of the phosphogypsum layer 4 can play an energy dispersion role when micro-deformation of the floor occurs, so as to effectively weaken the stress concentration on the surface of the phosphogypsum layer 4, thereby blocking the expansion speed of fine secondary cracks. In addition, another function of the functional cavity 302 in the present invention is to serve as a grouting channel for transporting slurry to the cracks in the later stage. At the same time, since the present invention is also provided with The steel nails 304, caulking tubes 306, caulking holes 303 and sealing paraffin 305 are provided, so that they can cooperate with the functional cavity 302 to grout and reinforce the cracks guided by positioning; specifically, the sealing paraffin is used to seal the caulking holes 303 to prevent materials from flowing into the caulking holes 303 and the functional cavity 302 during the construction of the phosphogypsum layer 4, thereby causing the caulking holes 303 and the functional cavity 302 to be blocked; the functions of the steel nails 304 include: first, facilitating the anchoring of the stress inducing strips 3 on the base layer 1 to prevent the stress inducing strips 3 from shifting or warping when pouring the phosphogypsum; second, utilizing the heat conduction of the steel nails, after the phosphogypsum layer 4 is initially solidified, the sealing paraffin 305 is melted by heating the steel nails, thereby making the caulking holes 303 penetrate; third, the steel nails are located at the position where the cracks are generated, and after grouting reinforcement, the steel nails can serve as reinforcement bars at this position;

[0059] Based on the above, please refer to Figure 7 and Figure 11 After the phosphogypsum layer 4 is finally set, the crack 7 will be formed at the position of the phosphogypsum layer 4 above the stress inducing strip 3 through the positioning induction of the stress inducing strip 3. Figure 12 After the phosphogypsum layer 4 solidifies, grouting can be carried out through the grouting pipe 306, and the slurry passes through the functional cavity 302 and the grouting hole 303 in turn into the crack 7, thereby filling and reinforcing the crack to improve the overall durability and stability of the phosphogypsum self-leveling floor; in addition, after the grouting reinforcement is completed, the slurry fills the deformation groove 307, the functional cavity 302 and the grouting hole 303, and the stress inducing strip 3 is transformed into a dense body, which almost no longer has the ability to absorb stress. At this time, the grid-like stress inducing skeleton 8 can serve as a permanent bottom support structure to reinforce the phosphogypsum layer 4 as a whole, further improving the overall durability and stability of the phosphogypsum self-leveling floor.

[0060] Further, in a preferred embodiment, see Figure 11The present invention further includes: a steel mesh layer 5, which is arranged in the phosphogypsum layer 4 and connected to the stress inducing strips 3; by providing the steel mesh layer 5, the overall strength of the phosphogypsum self-leveling floor can be enhanced, and at the same time, when the phosphogypsum layer 4 hardens, the steel mesh layer 5 can transfer stress to the stress inducing strips 3, so that cracks are better concentrated in the phosphogypsum layer 4 above the stress inducing strips 3;

[0061] Further, in a preferred embodiment, see Figure 10 and Figure 11 The phosphogypsum layer 4 includes a phosphogypsum upper pouring layer 401 and a phosphogypsum lower pouring layer 402 sequentially arranged from top to bottom, and the steel mesh layer 5 is arranged at the interface between the phosphogypsum upper pouring layer 401 and the phosphogypsum lower pouring layer 402; based on this arrangement, during construction, the phosphogypsum lower pouring layer 402 and the phosphogypsum upper pouring layer 401 can be poured in layers. In this way, when the phosphogypsum lower pouring layer 402 is initially set, the steel mesh layer 5 can be directly laid and embedded in the top surface of the phosphogypsum lower pouring layer 402, thereby eliminating the need to provide a pad to support the steel mesh layer 5;

[0062] Furthermore, in a preferred embodiment, the distance between the top of the phosphogypsum lower pouring layer 402 and the upper end of the grouting hole 303 is 0.5-1 cm; based on this, after the construction of the phosphogypsum lower pouring layer 402, the phosphogypsum lower pouring layer 402 has covered the grouting hole 303, and only a small part of the steel nail 304 is buried in the phosphogypsum lower pouring layer 402, so that the steel nail 304 can be heated after the phosphogypsum lower pouring layer 402 is initially solidified to quickly melt the sealing paraffin 305. At this time, the phosphogypsum lower pouring layer 402 is locally solidified by heat to replace the sealing paraffin 305 for covering the grouting hole 303, and the phosphogypsum upper pouring layer 401 can be poured subsequently without the need to heat the steel nail 304 to melt the sealing paraffin 305.

[0063] Further, in a preferred embodiment, see Figure 8 and Figure 9 The upper part of the steel nail 304 is buried in the phosphogypsum layer 4, and a crack reinforcement steel wire 3041 is arranged on the surrounding side; based on this, during grouting reinforcement, the steel nail and the crack reinforcement steel wire can cooperate to reinforce the crack to improve the overall strength of the position after grouting.

[0064] Further, in a preferred embodiment, see Figure 5The stress-inducing strip 3 further includes a plurality of deformation grooves 307 arranged inside the base strip 301 along the length direction of the base strip 301. The plurality of deformation grooves 307 are distributed around the functional cavity 302 and are in communication with the functional cavity 302. Based on this, by providing the plurality of deformation grooves 307 around the functional cavity 302, firstly, the stress-inducing strip 3 has a more sensitive space for absorbing stress inward and deforming, so that cracks can be better concentrated at the position of the phosphogypsum layer 4 above the base strip 301. Secondly, when the two sides of the stress-inducing strip 3 are subjected to a large difference in unbalanced stress, the unbalanced stress on both sides can be reduced or lowered by the different degrees of force deformation of the deformation grooves 307 on both sides, thereby reducing the number and width of cracks.

[0065] Further, in a preferred embodiment, see Figure 5 The stress inducing strip 3 also includes a plurality of stress inducing ribs 308 arranged along the length direction of the base strip 301. The plurality of stress inducing ribs 308 are arranged in a one-to-one correspondence with the deformation grooves 307. The stress inducing ribs 308 seal and penetrate the base strip 301, and one end extends to the outside of the base strip 301 and the other end extends to the deformation groove 307. Based on this arrangement, when the phosphogypsum layer 4 is finally set, the stress generated by the phosphogypsum layer 4 can be better transmitted to the deformation groove 307 through the stress inducing ribs 308. In addition, after the grouting reinforcement is completed, since one end of the stress inducing rib 308 is anchored in the phosphogypsum layer 4 and the other end is anchored in the deformation groove 307 and bonded with the solidified grouting slurry, the connection between the stress inducing strip 3 and the phosphogypsum layer 4 can be strengthened, thereby increasing the overall reinforcement and strengthening effect of the grid-like stress inducing skeleton 8 as a permanent bottom support structure on the phosphogypsum layer 4.

[0066] Furthermore, in a preferred embodiment, the fiber mesh layer 601 is a polypropylene fiber mesh or a glass fiber cloth, and the polymer coating 602 is sprayed with an epoxy emulsion or an elastic acrylic modifier, with a spraying thickness of 0.5 to 1 mm.

[0067] Furthermore, in a preferred embodiment, the cross-sections of the base strip 301 and the functional cavity 302 are semicircular, the length of the base strip 301 is 1.5-2.0 m, and the diameter of the functional cavity 302 is 0.5-0.6 times the diameter of the base strip 301 .

[0068] Example 2

[0069] This embodiment provides a construction method for crack positioning and induction reinforcement of phosphogypsum self-leveling floor, please refer to Figure 8 、 Figure 9 、 Figure 11 and Figure 12 , which includes the following steps:

[0070] S1. Base layer processing

[0071] Remove impurities and floating dust from the construction area, keep the surface of the base layer 1 clean and dry, and apply the interface agent layer 2 on the surface of the base layer 1 to enhance the adhesion of the base layer 1;

[0072] S2. Install stress-inducing frame

[0073] The stress inducing strips 3 are assembled and laid on the surface of the interface agent layer 2 in a grid shape, and the steel nails 304 are nailed into the bottom of the inducing strips 301 through the caulking holes 303 and the functional cavities 302 until they are anchored into the base layer 1. The top of the steel nails 304 is controlled to be higher than the design elevation of the floor, and the sealing paraffin 305 is filled at the top of the gap between the caulking holes 303 and the steel nails 304 to seal the caulking holes 303, thereby completing the installation and fixation of the stress inducing skeleton 8; in this embodiment, as Figure 6 As shown, the stress-inducing skeleton 8 after installation is a square grid structure, and each side of the square grid of the stress-inducing skeleton 8 is spliced ​​by three stress-inducing strips 3;

[0074] S3. Construction of phosphogypsum layer

[0075] First, prepare the phosphogypsum slurry, that is, use phosphogypsum as the main cementitious material, supplemented by fly ash, silica fume and other mineral admixtures for secondary activation to improve the fluidity of phosphogypsum, delay the shrinkage rate, and enhance its cohesion and construction adaptability. In addition, by adding a certain amount of alkali and acid-resistant stabilizers, the crystal expansion problem of phosphogypsum in an alkaline reaction environment can be effectively alleviated, its crack resistance and durability can be improved, and a basic guarantee for floor stability can be provided. When preparing phosphogypsum, use a mixer to fully mix until the slurry is uniform and fine, so that the slurry has good pumpability and self-leveling properties.

[0076] A phosphogypsum layer 4 is constructed on the upper surface of the interface agent layer 2. Specifically, a special pump truck can be used to evenly pour the phosphogypsum slurry onto the interface agent layer 2, so that it automatically spreads and covers the laid stress-inducing skeleton 8. At the same time, the grouting pipe 306 is pulled so that one end passes through the phosphogypsum layer 4 and extends to the outside of the floor, so that the stress-inducing skeleton 8 is embedded in the phosphogypsum layer 4. Pay attention to ensure that the material layer thickness above the stress-inducing skeleton 8 is not less than 1.5 cm;

[0077] The phosphogypsum layer has good spreading properties after construction and does not require repeated manual leveling. If you need to improve the appearance, you can use a tooth rake to assist in even spreading, and then let it stand for 30 to 60 minutes until the bubbles escape naturally.

[0078] S4. Melting wax and constructing fiber mesh layer

[0079] After the phosphogypsum layer 4 has initially solidified (approximately 2 to 3 hours), a flamethrower 9 is used to heat the top of the steel nail 304. The heat conduction from the steel nail 304 causes the sealing wax 305 to melt. The steel nail 304 is then completely driven into the phosphogypsum layer 4. Afterwards, the fiber mesh layer 601 is gently pressed and laid to embed it into the surface of the phosphogypsum layer 4.

[0080] S5. Crack location, induction and reinforcement

[0081] Keep the construction site ventilated and moderately moist. Curing should be carried out at room temperature for 24-48 hours to allow the phosphogypsum layer 4 to finally set. Then, spray polymer coating 602 onto the surface of the phosphogypsum layer 4. After the phosphogypsum layer 4 solidifies (approximately 3-7 days), stress-inducing strips 3 are used to position and induce cracks 7 to form in the phosphogypsum layer 4 above the stress-inducing strips 3. Grouting is then performed through grouting pipes 306, allowing the slurry to fill the deformation grooves 307, functional cavities 302, and grouting holes 303 and enter the cracks 7. The final floor thickness is recommended to be within the range of 30-80 mm to accommodate the load requirements of industrial plants and garages.

[0082] Example 3

[0083] This embodiment provides a construction method for crack positioning and induction reinforcement of phosphogypsum self-leveling floor, please refer to Figure 8 、 Figure 10 、 Figure 11 and Figure 12 , which adopts the method of Example 2, but is different from Example 2 in the following ways:

[0084] In step S3, the phosphogypsum layer is poured in layers, that is, the phosphogypsum lower pouring layer 402 is first poured on the upper surface of the interface agent layer 2, and the distance between the top of the phosphogypsum lower pouring layer 402 and the upper end of the grouting hole 303 is controlled to be 0.5-1 cm; when the phosphogypsum lower pouring layer 402 is initially solidified, the steel mesh layer 5 is laid and embedded in the top surface of the phosphogypsum lower pouring layer 402, and the top of the steel nail 304 is heated with a torch to quickly melt the sealing paraffin 305. At the same time, the phosphogypsum lower pouring layer 402 outside the steel nail 304 is partially solidified by heat to replace the sealing paraffin 305 for covering the grouting hole 303, and then the phosphogypsum upper pouring layer 401 is continued to be poured;

[0085] In step S4, after the phosphogypsum upper casting layer 401 is initially solidified, the steel nails 304 are completely nailed into the phosphogypsum upper casting layer 401, and the fiber mesh layer 601 is laid with light pressure to embed it into the surface of the phosphogypsum upper casting layer 401, without using a flamethrower to heat the steel nails 304 to melt the sealing paraffin 305.

Claims

1. A crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure, comprising an interface agent layer coated on the surface of the base layer and a phosphogypsum layer poured on the upper surface of the interface agent layer, characterized in that: Also includes: A stress-inducing skeleton fixedly arranged on the upper surface of the interface agent layer and embedded in the phosphogypsum layer, and a flexible micro-compensation structure layer sprayed on the upper surface of the phosphogypsum layer; The flexible micro-compensation structure layer includes a fiber mesh layer embedded in the surface of the phosphogypsum layer after the phosphogypsum layer is initially set, and a polymer coating sprayed on the surface of the phosphogypsum layer after the phosphogypsum layer is solidified; The stress-inducing skeleton is assembled in a grid shape by stress-inducing strips, and the stress-inducing strips include a grouting tube, a base strip, a functional cavity arranged inside the base strip along the length direction of the base strip, a plurality of grouting holes evenly arranged at the center position of the top of the base strip along the length direction of the base strip, and steel nails and sealing wax arranged in a one-to-one correspondence with the plurality of grouting holes; the bottom of the grouting hole is connected with the functional cavity, and the top is connected with the outside of the base strip; the grouting tube seals and passes through the side wall of the base strip, and one end is connected with the functional cavity, and the other end passes through the phosphogypsum layer and extends to the outside of the floor; the length of the steel nail is greater than the thickness of the floor, and after passing through the grouting hole and the functional cavity, the steel nail is nailed into the bottom of the base strip and anchored in the base layer; the sealing wax fills the top of the gap between the grouting hole and the steel nail.

2. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 1 is characterized in that: Also includes: The steel mesh layer is arranged in the phosphogypsum layer and is connected to the stress inducing strip.

3. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 2, characterized in that: The phosphogypsum layer includes a phosphogypsum upper casting layer and a phosphogypsum lower casting layer which are sequentially arranged from top to bottom, and the steel mesh layer is arranged at the interface between the phosphogypsum upper casting layer and the phosphogypsum lower casting layer.

4. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 3 is characterized in that: The distance between the top of the phosphogypsum lower pouring layer and the upper end of the grouting hole is 0.5-1 cm.

5. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 1 is characterized in that: The upper part of the steel nail is buried in the phosphogypsum layer, and crack reinforcement steel wire is arranged on the surrounding side.

6. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 1, characterized in that: The stress inducing strip further comprises a plurality of deformation grooves arranged inside the base strip along the length direction of the base strip, and the plurality of deformation grooves are distributed around the functional cavity and communicated with the functional cavity.

7. A crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 6, characterized in that: The stress inducing strip also includes a plurality of stress inducing ribs arranged along the length direction of the base strip. The plurality of stress inducing ribs are arranged in a one-to-one correspondence with the deformation grooves. The stress inducing ribs seal through the base strip and one end extends to the outside of the base strip and the other end extends into the deformation groove.

8. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 1, characterized in that: The fiber mesh layer is a polypropylene fiber mesh or a glass fiber cloth, and the polymer coating is sprayed by epoxy emulsion or elastic acrylic modifier, with a spraying thickness of 0.5 to 1 mm.

9. The crack positioning and induction reinforcement phosphogypsum self-leveling floor construction structure according to claim 1, characterized in that: The cross sections of the base strip and the functional cavity are semicircular, the length of the base strip is 1.5-2 m, and the diameter of the functional cavity is 0.5-0.6 times the diameter of the base strip.

10. A construction method for crack positioning and induction reinforcement of phosphogypsum self-leveling floor, characterized in that The steps include: S1. Base layer processing Applying an interface agent layer on the surface of the base layer; S2. Install stress-inducing frame Assemble and lay the stress-inducing strips in a grid pattern on the surface of the interface agent layer. Drive steel nails through the grouting holes and functional cavities and into the bottom of the inducing strips until they are anchored into the base layer. Ensure that the top of the steel nails is higher than the designed elevation of the floor. Fill the top of the gap between the grouting holes and the steel nails with sealing wax to seal the grouting holes, thus completing the installation and fixation of the stress-inducing skeleton. S3. Construction of phosphogypsum layer A phosphogypsum layer is constructed on the upper surface of the interface agent layer, and a caulking pipe is pulled so that one end thereof passes through the phosphogypsum layer and extends to the outside, so that the stress-inducing skeleton is embedded in the phosphogypsum layer; S4. Melting wax and constructing fiber mesh layer After the phosphogypsum layer has initially solidified, the top of the steel nail is heated to melt the sealing wax through heat conduction from the nail. The nail is then driven completely into the phosphogypsum layer. A fiber mesh layer is then laid to embed it into the surface of the phosphogypsum layer. S5. Crack location, induction and reinforcement After the phosphogypsum layer is finally set, a polymer coating is sprayed on the surface of the phosphogypsum layer; after the phosphogypsum layer is solidified, cracks are formed in the phosphogypsum layer above the stress-inducing strips through positioning induction, and grouting is performed through the grouting pipe to fill the deformation grooves, functional cavities and grouting holes and enter the cracks.

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