Self-leveling UHPC (Ultra High Performance Concrete) wear-resistant terrace and construction process thereof

Abstract

The invention provides a self-leveling UHPC wear-resistant floor and a construction process thereof. The self-leveling UHPC wear-resistant floor comprises a base layer, the upper end of the base layer is fixedly connected with a self-compacting concrete leveling layer, the upper end of the self-compacting concrete leveling layer is fixedly connected with a UHPC reinforcing layer, and the upper end of the UHPC reinforcing layer is fixedly connected with a UHPC surface layer; the top of the self-compacting concrete leveling layer is provided with partially exposed steel fibers and / or coarse aggregates; the UHPC reinforcing layer is composed of UHPC doped with reinforcing fibers and a reinforcing mesh, and the reinforcing mesh is arranged in the middle of the UHPC reinforcing layer and wrapped and fixed by the UHPC doped with the reinforcing fibers; the top of the UHPC reinforcing layer is provided with partially exposed steel fibers and / or coarse aggregates; the diameter of the steel fiber is 0.35-0.6 mm, and the length of the steel fiber is 30-60 mm; the coarse aggregate is solid waste. The self-leveling UHPC wear-resistant floor is high in strength, excellent in durability and wear resistance, environmentally friendly, free of pollution, low in cost and short in construction period, and has good engineering application value.

Description

Technical Field

[0001] The present invention relates to the technical field of building concrete flooring, and in particular to a self-leveling UHPC wear-resistant flooring and a construction process thereof. Background Art

[0002] Flooring refers to the use of specific materials and processes to construct the original ground and present a certain decorative and functional ground. It bears the load of the ground floor room and requires a certain strength and rigidity, and has moisture-proof, waterproof, warm and wear-resistant properties. With the rapid development of my country's construction industry, large-area concrete floors are increasingly used in industrial engineering construction.

[0003] In actual application, with the continuous improvement of my country's economic level, the popularity of automobiles has increased significantly, and the frequent entry and exit of vehicles has caused increasingly serious loads and damage to the floor. Due to the long-term load of ground traffic, concrete floors often face many problems such as cracks, sanding, and rough surfaces. Frequent rolling and friction of vehicles often cause the floor surface to be damaged and fall off, resulting in uneven road surfaces and frequent repairs, which leads to a significant decrease in the performance and service life of ordinary cement concrete floors. This not only increases the complexity of floor maintenance, but also significantly increases the subsequent maintenance costs, highlighting the problem of insufficient durability and wear resistance of the floor. This trend puts forward more stringent requirements on the performance of cement concrete floors.

[0004] At present, the construction method of wear-resistant floor is mostly: first lay the concrete base, sprinkle wear-resistant powder on the surface of the concrete base in the initial setting stage, and then process it by special means to make the wear-resistant powder and the concrete base form a whole. When the flatness of the concrete floor is poor, cement-based self-leveling or concrete leveling floor is generally used for rework and redoing, but the maximum leveling thickness of cement-based self-leveling is 3mm. Above this thickness, hollowing and cracking are prone to occur. The re-construction of the concrete floor leveling layer will cause great pollution to the ceiling and wall decoration, and the cost is high and the construction period is long.

[0005] Chinese patent CN220353306U "A self-leveling floor structure" discloses a self-leveling floor structure, including a base layer, a primer coating, an intermediate layer, and a paint layer. The primer coating is connected to a plurality of support seats, and adjacent support seats are connected to steel bars. The strength and rigidity of the self-leveling floor are increased by laying steel bars in the intermediate layer, and the bearing capacity of the self-leveling floor is improved, so that it can withstand greater loads and pressures; at the same time, the crack resistance of the self-leveling floor is increased, and the cracking and deformation of the self-leveling floor caused by load or temperature changes are reduced, and the service life of the floor is extended. However, the material strength of the self-leveling floor structure itself is low, and the epoxy resin requires a long time to solidify, resulting in a long construction period, high cost, and low interlayer bonding strength. After long-term use, delamination and cracking may occur, which will cause the self-leveling floor to slide and deviate from the original position, resulting in a short service life.

[0006] Therefore, it is of great significance to develop a self-leveling UHPC wear-resistant floor with high strength, short construction period and long service life and its construction technology. Summary of the invention

[0007] In view of the fact that the existing floor has low material strength, long construction period, high cost, and low interlayer bonding strength, delamination and cracking may occur after long-term use, which will cause the self-leveling floor to slide and deviate from the original position, resulting in a short service life. The present invention provides a self-leveling UHPC wear-resistant floor, including a base layer, and a self-compacting concrete leveling layer, a UHPC reinforcement layer and a UHPC surface layer stacked on the base layer in sequence. The layers are connected by steel fibers and / or coarse aggregates to improve the material strength and interlayer bonding strength of the floor, and have low shrinkage, wear resistance and crack resistance, ensuring the high strength and crack-free characteristics of the floor. At the same time, the use of high-fluidity concrete materials for construction not only eliminates the vibration step, but also significantly shortens the construction period, simplifies the construction process, and improves the construction efficiency. The present invention further enhances the durability and aesthetic value of the self-leveling UHPC wear-resistant floor by optimizing the cost structure and achieving high-precision flatness. It has a long service life, effectively reduces the overall cost of the project and subsequent maintenance costs, achieves a dual improvement in economic benefits and practicality and aesthetics, and has good engineering application value.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] A self-leveling UHPC wear-resistant floor, comprising a base layer, a self-compacting concrete leveling layer is fixedly connected to the upper end of the base layer, a UHPC reinforcing layer is fixedly connected to the upper end of the self-compacting concrete leveling layer, and a UHPC surface layer is fixedly connected to the upper end of the UHPC reinforcing layer;

[0010] The top of the self-compacting concrete leveling layer is provided with partially exposed steel fibers and / or coarse aggregate;

[0011] The UHPC reinforcement layer is composed of UHPC mixed with reinforcing fibers and a steel mesh, wherein the steel mesh is arranged in the middle of the UHPC reinforcement layer and is wrapped and fixed by the UHPC mixed with reinforcing fibers; the top of the UHPC reinforcement layer is provided with partially exposed steel fibers and / or coarse aggregates;

[0012] The steel fiber has a diameter of 0.35-0.6 mm and a length of 30-60 mm; the coarse aggregate is solid waste.

[0013] Furthermore, the top of the self-compacting concrete leveling layer is provided with partially exposed steel fibers and coarse aggregate; the top of the UHPC reinforcement layer is provided with partially exposed steel fibers.

[0014] Furthermore, a cement mortar binder is evenly distributed on the bottom of the self-compacting concrete leveling layer, with a thickness of 0.5-1.5 mm.

[0015] Furthermore, the self-compacting concrete leveling layer has a strength grade of C40, a slump expansion of 600±50mm, and a thickness of 40-60mm.

[0016] Furthermore, the self-compacting concrete leveling layer is mixed with an expansion agent in an amount of 8-12%.

[0017] Furthermore, the slump expansion of the UHPC reinforcement layer is 600±50 mm and the thickness is 20-40 mm.

[0018] Furthermore, the reinforcing fibers in the UHPC reinforcement layer are one or more of PP fibers, PVA fibers and POM fibers.

[0019] Furthermore, the diameter of the steel mesh in the UHPC reinforcement layer is 1-3 mm, and the mesh width is 30-50 mm.

[0020] Furthermore, the slump expansion of the UHPC surface layer is 650±50 mm and the thickness is 10-20 mm.

[0021] Another object of the present invention is to provide a construction process for a self-leveling UHPC wear-resistant floor.

[0022] A construction process of the self-leveling UHPC wear-resistant floor as described in any one of the above items comprises the following steps:

[0023] S1. Clean the surface of the base layer;

[0024] S2. Sweep cement mortar on the cleaned base, pour a self-compacting concrete leveling layer, and evenly set steel fibers and / or coarse aggregate on the surface of the self-compacting concrete leveling layer;

[0025] S3. After the self-compacting concrete leveling layer reaches final setting, the surface is roughened to expose the steel fibers and / or coarse aggregate in the surface layer of the self-compacting concrete, and the surface is slurry-brushed. After slurry-brushing, a steel mesh is laid on top of it in a overlapping manner and installed diagonally, keeping the steel mesh off the ground, and pouring the UHPC reinforcement layer so that the steel mesh is in the middle of the UHPC reinforcement layer, and steel fibers and / or coarse aggregate are evenly arranged on the surface of the UHPC reinforcement layer;

[0026] S4. After the initial setting of the UHPC reinforcement layer, pour the UHPC surface layer on it, perform water curing, and polish it after curing for 7-14 days to obtain the self-leveling UHPC wear-resistant floor.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] The self-leveling UHPC wear-resistant floor of the present invention comprises a base layer, and a self-compacting concrete leveling layer, a UHPC reinforcing layer and a UHPC surface layer which are sequentially stacked on the base layer; the self-compacting concrete in the self-compacting concrete leveling layer has excellent fluidity, can automatically flow and fill the uneven parts of the base surface, ensure the uniformity and flatness of the leveling layer, and its good compactness can reduce the generation of voids and cracks, thereby improving the bearing capacity and overall stability of the self-leveling UHPC wear-resistant floor; the UHPC reinforcing layer is mainly composed of UHPC with excellent strength and good fluidity, wherein reinforcing fibers are doped and steel mesh is laid, so that the self-leveling UHPC wear-resistant floor can withstand various complex external forces, has excellent durability and crack resistance, and can be suitable for various places requiring high load-bearing, high durability and high crack resistance, greatly increases the service life, and effectively reduces the maintenance and repair costs; the UHPC surface layer mainly uses undoped fibers and The UHPC with high fluidity is used for paving, which effectively reduces the construction difficulty and cost of the floor, and the surface of the paved floor is smooth, flat and has excellent corrosion resistance. The present invention uses coarse aggregate and / or steel fiber as the connecting material between the self-compacting concrete leveling layer, the UHPC reinforcement layer and the UHPC surface layer, which not only increases the roughness between the interfaces, significantly improves the bite force and bonding strength of the bonding surfaces between the concrete layers, but also can cause the bonding surfaces of the three layers of concrete to no longer have clear boundaries, but gradually merge to form an overall structure without obvious dividing lines, thereby enhancing the integrity and stability, as if the three layers are combined into one; in addition, the use of solid waste materials as coarse aggregate not only reduces the production cost, but also improves the environmental protection performance, and effectively solves the problem of insufficient strength that may be caused by the existence of the interface, so that the obtained self-leveling UHPC wear-resistant floor has high strength, excellent durability and wear resistance, is environmentally friendly and pollution-free, and has low cost and short construction period.

[0029] The self-leveling UHPC wear-resistant floor of the present invention is constructed with high-fluidity concrete materials as a whole, which not only eliminates the vibration step, but also significantly shortens the construction period, simplifies the construction process, improves the construction efficiency, and brings a safer and more comfortable environment to the work site. The floor has low shrinkage, wear resistance and crack resistance, ensuring the high strength and crack-free characteristics of the floor. At the same time, by optimizing the cost structure and achieving high-precision flatness, the durability and aesthetic value of the floor are further enhanced, effectively reducing the overall cost of the project and subsequent maintenance costs, achieving a dual improvement in economic benefits and practical beauty, and has good engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0031] The drawings described herein are used to provide further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] Figure 1 It is a schematic diagram of a self-leveling UHPC wear-resistant floor; figure numbers: 1-concrete base, 2-self-compacting concrete leveling layer, 3-coarse aggregate, 4-UHPC reinforcement layer, 5-steel mesh, 6-UHPC surface layer, 7-steel fiber. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Obviously, the following embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; it should be understood that the embodiments of the present invention are only used to illustrate the technical effects of the present invention, rather than to limit the scope of protection of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] It should be clarified that in this article, the terms "including", "wherein", "further" or any variants thereof are intended to express a non-exclusive inclusion relationship, that is, when it comes to a process, method, article or device that includes a series of elements, it not only covers the elements explicitly listed, but also may include other elements that are not explicitly listed, or elements inherent to the process, method, article or device. Without additional restrictions, the elements defined by "including one..." do not exclude the possibility of other identical elements in the process, method, article or device.

[0035] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right side", "end", "front", "back", "middle", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The following is combined with Figure 1 The present invention is described in further detail.

[0038] The embodiment of the present invention discloses a self-leveling UHPC wear-resistant floor and its construction process. Figure 1 A self-leveling UHPC wear-resistant floor in this embodiment includes a concrete base layer 1, on which a self-compacting concrete leveling layer 2, a UHPC reinforcement layer 4, and a UHPC surface layer 6 are sequentially arranged, and the upper surface of the self-compacting concrete leveling layer 2 is provided with partially exposed coarse aggregate 3 and steel fiber 7, which are inlaid and connected with the bottom of the UHPC reinforcement layer 4, and a steel mesh 5 is provided in the middle of the UHPC reinforcement layer 4, and a partially exposed steel fiber 7 is provided on the upper surface, which is inlaid and connected with the bottom of the UHPC surface layer 6.

[0039] In this embodiment:

[0040] The concrete base 1 is a common common concrete floor, which is mainly made of cement, sand, stone and water mixed in a certain proportion. The concrete base 1 in this embodiment is a concrete base that has existed before but has exceeded the service life of the floor and is used as a foundation.

[0041] The self-compacting concrete leveling layer 2 is laid on the top of the concrete base 1, and is connected by the cement mortar adhesive evenly distributed at the bottom of the self-compacting concrete leveling layer 2. The thickness of the cement mortar is 0.5-1.5mm. Specifically, in this embodiment, the cement mortar adhesive of the self-compacting concrete leveling layer 2 is 1:3 cement mortar, which is laid on the cleaned and completely hardened concrete base with a thickness of 1mm. The strength grade of the self-compacting concrete leveling layer is C40, the slump expansion is 600±50mm, and the laying thickness can be 40-60mm. Different preferred self-compacting concrete leveling layer thicknesses can be selected according to the flatness of the concrete base. Specifically, the thickness of the self-compacting concrete leveling layer 2 described in this embodiment is 50mm. The self-compacting concrete leveling layer is mixed with an expansion agent, and the amount can be 8-12%. Specifically, in this embodiment, the self-compacting concrete leveling layer 2 is mixed with a high-efficiency expansion agent of Lechang Sanqiang Building Materials Co., Ltd., and the amount is 10%.

[0042] The self-compacting concrete in the self-compacting concrete leveling layer has excellent fluidity, can automatically flow and fill the uneven parts of the base surface, ensure the uniformity and flatness of the leveling layer, and its good compactness can reduce the generation of gaps and cracks, improve the bearing capacity and overall stability of the self-leveling UHPC wear-resistant floor; fill the defects and potholes of the base with the bottom cement mortar, so that the self-leveling UHPC wear-resistant floor of the present invention is more flat and firm; the doped high-efficiency expansion agent produces a micro-expansion effect during the hardening process of the self-compacting concrete, compensates for the shrinkage of the self-compacting concrete, thereby reducing the formation of cracks and improving the compactness and impermeability of the self-compacting concrete leveling layer 2. This micro-expansion effect can also delay the shrinkage process of the self-compacting concrete, further reduce the generation of cracks, and enhance the crack resistance of the self-compacting concrete leveling layer 2.

[0043] The upper surface of the self-compacting concrete leveling layer 2 is provided with partially exposed coarse aggregate 3 and steel fiber 7, which are embedded and connected with the bottom of the UHPC reinforcement layer 4. The steel fiber has a diameter of 0.35-0.6 mm and a length of 30-60 mm; the coarse aggregate is solid waste. Specifically, in this embodiment, the coarse aggregate 3 is recycled coarse aggregate from solid waste, and the steel fiber 7 has a diameter of 0.5 mm and a length of 50 mm.

[0044] By connecting the self-compacting concrete leveling layer and the UHPC reinforcement layer with coarse aggregate and steel fiber, the roughness between the interfaces can be significantly increased, thereby improving the bite force and bonding strength of the interlayer bonding surface, thereby enhancing the integrity and stability.

[0045] A steel mesh 5 is provided in the middle of the UHPC reinforcement layer 4. Specifically, the steel mesh 5 is laid on top of the self-compacting concrete leveling layer 2. The diameter of the steel mesh is 1-3mm and the mesh width is 30-50mm. The steel mesh 5 in this embodiment comes from Songmao Building Materials Co., Ltd. There is a pad under the steel mesh 5 as a support. The concrete pad is installed at the intersection of the cross lines and installed diagonally to keep the steel mesh off the ground. The UHPC reinforcement layer 4 is cast on the laid steel mesh 5. The UHPC reinforcement layer 4 is a self-leveling UHPC mixed with reinforcing fibers. The reinforcing fibers in the UHPC reinforcement layer can be one or more of PP fibers, PVA fibers and POM fibers. Specifically, the reinforcing fibers added to the UHPC reinforcement layer 4 are PP fibers, PVA fibers and POM fibers, and the amount is 2%. The slump expansion of the UHPC reinforcement layer is 600±50mm, and the thickness can be 10-20mm. In this embodiment, the thickness of the UHPC reinforcement layer 4 is preferably 30mm. The pouring time is after the self-compacting concrete leveling layer 2 is finally set and the surface is roughened, which can significantly improve the strength and crack resistance of the floor.

[0046] The UHPC reinforcement layer is mainly composed of UHPC with excellent strength and good fluidity, which is doped with reinforcing fibers and laid with steel mesh, so that the self-leveling UHPC wear-resistant floor can withstand various complex external forces, has excellent durability and crack resistance, and can be used in various places that require high load-bearing, high durability and high crack resistance, greatly increasing the service life and effectively reducing the maintenance and repair costs.

[0047] The upper surface of the UHPC reinforcement layer is provided with partially exposed steel fibers 7, which are embedded and connected with the bottom of the UHPC surface layer 6. The steel fibers have a diameter of 0.35-0.6 mm and a length of 30-60 mm; specifically, the steel fibers 7 have a diameter of 0.5 mm and a length of 50 mm.

[0048] By connecting the UHPC reinforcement layer and the UHPC surface layer through steel fibers, the bite force and bonding strength of the UHPC reinforcement layer and the UHPC surface layer can be further enhanced, and the bonding surface can no longer be clearly defined, forming an overall structure without obvious dividing lines, thereby enhancing the integrity and stability.

[0049] The use of coarse aggregate and / or steel fiber as the connecting material between the self-compacting concrete leveling layer, the UHPC reinforcement layer and the UHPC surface layer not only increases the roughness between the interfaces and significantly improves the bite force and bonding strength of the bonding surfaces between the concrete layers, but also makes the bonding surfaces of the three layers of concrete no longer have clear boundaries, but gradually merge to form an overall structure without obvious dividing lines, thereby enhancing the integrity and stability, as if the three layers are combined into one; in addition, the use of solid waste materials as coarse aggregate not only reduces production costs, but also improves environmental protection performance, and effectively solves the problem of insufficient strength that may be caused by the existence of interfaces, so that the resulting self-leveling UHPC wear-resistant floor has high strength, excellent durability and wear resistance, is environmentally friendly and pollution-free, and has low cost and short construction period.

[0050] The UHPC surface layer 6 is poured on the UHPC reinforcement layer 4. The UHPC surface layer 6 is a fiber-free self-leveling UHPC. Specifically, the slump expansion of the UHPC surface layer is 650±50mm, and the laying thickness can be 10-20mm. The preferred thickness of the UHPC surface layer 6 in this embodiment is 10mm, and the pouring time is after the initial setting of the UHPC reinforcement layer 4. The UHPC surface layer 6 can make the floor surface smooth and flat, and improve the surface strength and corrosion resistance.

[0051] The UHPC surface layer is mainly laid using UHPC that is not mixed with fibers and has high fluidity, which effectively reduces the construction difficulty and cost of the floor. The surface of the laid floor is smooth, flat and has excellent corrosion resistance.

[0052] A self-leveling UHPC wear-resistant floor construction process includes the following steps:

[0053] S1. Clean the surface of the base: remove cement slurry, old paint, and attached garbage and debris on the surface of the concrete base, and clean the surface of the base with a high-pressure water gun to ensure that the surface of the base is clean and free of foreign matter;

[0054] S2. Treat the cleaned concrete base with a porridge-like cement mortar to ensure that the surface of the base is rough, and then evenly apply the prepared cement slurry on the base to ensure that there are no omissions. After curing the applied cement slurry, pour the self-compacting concrete to level the floor. After the self-compacting concrete is poured, evenly sprinkle the coarse aggregate and steel fiber that have been prepared and rinsed in advance on its surface, and then vibrate the surface of the self-compacting concrete appropriately to disperse the coarse aggregate and steel fiber into the concrete surface;

[0055] S3. After the self-compacting concrete leveling layer reaches final setting, its surface is roughened to expose the steel fibers and / or coarse aggregates in the surface layer of the self-compacting concrete. After the roughening treatment, the surface is cleaned and then slurry is swept. After slurry is swept, concrete pads are installed on top and steel mesh is laid in overlap. Install the pads at the intersection of the cross lines and install them diagonally, keeping the steel mesh off the ground. Pour the mixed UHPC reinforcement layer on top of the laid steel mesh. The pouring thickness is higher than the steel mesh, so that the steel mesh is in the middle of the UHPC reinforcement layer. When the surface of the poured UHPC reinforcement layer is initially set but not completely solidified, evenly sprinkle the steel fibers on the concrete surface and gently press the steel fibers into the concrete with a roller, while ensuring that part of the steel fibers are exposed on the concrete surface.

[0056] S4. After the initial setting of the UHPC reinforcement layer, pour the UHPC surface layer on top of it and perform water curing. After curing for 7-14 days, polish the surface to make the surface smoother and flatter, thus obtaining the self-leveling UHPC wear-resistant floor.

[0057] The self-leveling UHPC wear-resistant floor of the present invention is constructed entirely of highly fluid concrete materials, which not only eliminates the vibration step, but also significantly shortens the construction period, simplifies the construction process, improves construction efficiency, and brings a safer and more comfortable environment to the work site.

[0058] The present invention obtains an ultra-high performance wear-resistant concrete floor by laying a self-compacting concrete leveling layer and a self-leveling UHPC reinforcement layer and surface layer on the concrete base layer, which greatly simplifies the construction process. In addition, the UHPC surface layer can be laid after the reinforcement layer is initially set, which shortens the construction period and greatly increases the construction efficiency. The self-leveling UHPC wear-resistant floor of the present invention has low shrinkage, wear resistance, and crack resistance, high strength, low cost, and high flatness, which enhances the durability and aesthetic value of the floor, effectively reduces the overall cost of the project and subsequent maintenance costs, achieves a dual improvement in economic benefits and practicality and beauty, and has good engineering application value.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-leveling UHPC wear-resistant floor, characterized by: It comprises a base layer, the upper end of which is fixedly connected to a self-compacting concrete leveling layer, the upper end of which is fixedly connected to a UHPC reinforcement layer, and the upper end of which is fixedly connected to a UHPC surface layer; The top of the self-compacting concrete leveling layer is provided with partially exposed steel fibers and / or coarse aggregate; The UHPC reinforcement layer is composed of UHPC mixed with reinforcing fibers and a steel mesh, wherein the steel mesh is arranged in the middle of the UHPC reinforcement layer and is wrapped and fixed by the UHPC mixed with reinforcing fibers; the top of the UHPC reinforcement layer is provided with partially exposed steel fibers and / or coarse aggregates; The steel fiber has a diameter of 0.35-0.6 mm and a length of 30-60 mm; the coarse aggregate is solid waste.

2. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The top of the self-compacting concrete leveling layer is provided with partially exposed steel fibers and coarse aggregates; the top of the UHPC reinforcement layer is provided with partially exposed steel fibers.

3. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The bottom of the self-compacting concrete leveling layer is evenly distributed with cement mortar adhesive, with a thickness of 0.5-1.5 mm.

4. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The self-compacting concrete leveling layer has a strength grade of C40, a slump expansion of 600±50mm, and a thickness of 40-60mm.

5. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The self-compacting concrete leveling layer is mixed with an expansion agent in an amount of 8-12%.

6. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The UHPC reinforcement layer has a slump expansion of 600±50 mm and a thickness of 20-40 mm.

7. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The reinforcing fibers in the UHPC reinforcement layer are one or more of PP fibers, PVA fibers and POM fibers.

8. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The diameter of the steel mesh in the UHPC reinforcement layer is 1-3 mm, and the mesh width is 30-50 mm.

9. A self-leveling UHPC wear-resistant floor according to claim 1, characterized in that: The slump expansion of the UHPC surface layer is 650±50 mm and the thickness is 10-20 mm.

10. A construction process for a self-leveling UHPC wear-resistant floor as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Clean the surface of the base layer; S2. Sweep cement mortar on the cleaned base, pour a self-compacting concrete leveling layer, and evenly set steel fibers and / or coarse aggregate on the surface of the self-compacting concrete leveling layer; S3. After the self-compacting concrete leveling layer reaches final setting, the surface is roughened to expose the steel fibers and / or coarse aggregate in the surface layer of the self-compacting concrete, and the surface is slurry-brushed. After slurry-brushing, a steel mesh is laid on top of it in a overlapping manner and installed diagonally, keeping the steel mesh off the ground, and pouring the UHPC reinforcement layer so that the steel mesh is in the middle of the UHPC reinforcement layer, and steel fibers and / or coarse aggregate are evenly arranged on the surface of the UHPC reinforcement layer; S4. After the initial setting of the UHPC reinforcement layer, pour the UHPC surface layer on it, perform water curing, and polish it after curing for 7-14 days to obtain the self-leveling UHPC wear-resistant floor.

Images