Method for high-pressure grouting repair and seepage prevention of concrete terrace

Abstract

The invention relates to the technical field of concrete terrace grouting repair, in particular to a concrete terrace high-pressure grouting repair and seepage prevention method which comprises the following steps: S1, firstly, determining a position needing to be repaired, and cleaning the ground around a sinking or crack position to determine a grouting repair range; and S2, the thickness of a ground structure is determined according to the floor grouting position, and the ground structure comprises a floor surface layer, a concrete floor structure layer, a concrete cushion layer, an anti-seepage layer and a base layer. When the floor is repaired, construction with water can be carried out, the construction period is short, and it is verified that the use strength can be achieved in a short time, and meanwhile the non-seepage and non-leakage effect is completely achieved; meanwhile, when the terrace is repaired, the original terrace of the building does not need to be damaged, the influence on production and life use is reduced, and the invisible cost is reduced; and compared with traditional external replacement and repair, dismounting and modifying operation is small, and cost is saved.

Description

Technical Field

[0001] This invention relates to the field of concrete floor grouting repair technology, and in particular to a method for high-pressure grouting repair and seepage prevention of concrete floors. Background Technology

[0002] After a period of use, concrete floors often crack, settle, and leak, affecting their usability, especially in areas requiring high flatness or impermeability. Furthermore, water seepage through cracks in concrete floors, particularly in industrial plants, can cause wastewater to seep into the ground, leading to pollution.

[0003] Currently, the commonly used ground repair methods for high-rise buildings include the following: surface repair, which only repairs the surface decorative layer and cannot repair cracks; surface repair alone has poor durability; partial replacement, which can solve local defects, but the interface between the new and old concrete is prone to separation, the repair cost is high, the construction period is long, and it has a significant impact on daily production and use, resulting in high hidden costs. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for high-pressure grouting repair and seepage prevention of concrete floors.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A method for high-pressure grouting repair and seepage prevention of concrete floors includes the following steps: S1. First, identify the location that needs to be repaired and clean the ground around the subsidence or crack location to determine the scope of grouting repair. S2. Determine the thickness of the ground structure based on the grouting location. The ground structure includes the surface layer, concrete floor structure layer, concrete subbase, impermeable layer, and base layer. Determine the depth of the grouting holes and lay out the grouting holes. Install grouting stop needles in the grouting holes. S3. Use grouting equipment to inject reinforced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material into the grouting holes in S2. The injection pressure is 20-40MPa. When the ground slightly settles, stop grouting after the grouting volume of each grouting hole is ≤1L / min and the pressure is stable for more than 2 minutes. S4. After the first grouting is completed, let it stand for 1 hour, and after the grouting material at the crack opening is completely cured, remove the original water-stop needle head, continue drilling on the basis of the original grouting hole, and install a new water-stop needle head. S5. Use grouting equipment to inject epoxy-acrylate / ultrafine cement composite double-curing anti-seepage grouting material into the new water-stop needle in S4. The grouting pressure is 4-6 MPa. When the grouting volume of each new grouting hole is ≤1L / min and the pressure is stable for more than 1min, stop grouting. S6. After successful repair, remove the water-stop needle and seal the new grouting hole with a leak-stopping agent, and repair the original ground surface layer of the grouting hole.

[0006] Compared with existing technologies, this invention allows for floor repair work while the floor is wet, with a short construction period. It has been verified that the floor can reach the required strength in a short time while achieving a completely leak-proof effect. Furthermore, the floor repair does not require damage to the original floor of the building, reducing the impact on production and daily life and lowering hidden costs. In other words, compared with traditional external replacement and repair, the demolition and alteration work is smaller and the cost is lower.

[0007] Preferably, the grouting range in S1 extends outward by more than 300 mm from the location of the subsidence or crack to form a floor defect range, ensuring that all floor defect locations are covered.

[0008] Furthermore, it can effectively mark the location of floor defects for subsequent processing.

[0009] Preferably, in S2, the grouting hole depth reaches the road base layer by no less than 500mm, and in S5, the grouting hole depth penetrates the concrete subbase by more than 1 / 2 of its thickness; if the ground design does not include a concrete subbase, the grouting hole depth penetrates the concrete floor structure layer by more than 2 / 3 of its thickness.

[0010] Furthermore, the depth of the grouting holes can be precisely controlled at different times to effectively fill the grout.

[0011] Preferably, when the floor defect is sheet-like, the grouting holes are arranged in a quincunx pattern; when the floor defect is linear, the grouting holes are arranged along the joint; the spacing between the grouting holes is ≤500mm; and the distance between the grouting holes located at the edge and the edge of the floor defect is ≤200mm.

[0012] Furthermore, the distribution and location of the grouting holes should be controlled to ensure that grouting operations can be carried out effectively.

[0013] Preferably, the enhanced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material comprises two components, A and B. When using it, a certain amount of water is added according to a water-cement ratio of 0.25-0.35 and stirred evenly before use. Component A consists of rapid-hardening sulfoaluminate cement, ultrafine slag powder with a specific surface area ≥600m² / kg, magnesium oxide expanding agent, silica fume, reinforcing fiber, nano-montmorillonite, water-reducing agent and accelerator; Component B consists of waterborne polyurethane prepolymer.

[0014] Preferably, component A of the enhanced sulfoaluminate-polyurethane composite rapid-setting micro-expansion floor reinforcement grouting material is made from the following raw materials by weight percentage: 45%-55% rapid-hardening sulfoaluminate cement, 15%-25% ultrafine slag powder, 6%-10% magnesium oxide expanding agent, 5%-10% silica fume, 1%-2% reinforcing fiber, 3%-5% nano-montmorillonite, 1%-1.5% water-reducing agent, and 0.5%-1% accelerator.

[0015] Preferably, the epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grouting material comprises two components, C and D; Component C is a powder, consisting of ultrafine cement, calcium oxide expanding agent, nano silica, and water-reducing agent; Component D is a slurry, consisting of epoxy resin emulsion, propionate monomer, composite curing agent, and coupling agent; when using, add a certain amount of water at a water-cement ratio of 0.3-0.4 and stir evenly before use.

[0016] Preferably, the C component of the two-component epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grout is made from the following raw materials in weight percentages: 70%-80% ultrafine cement, 3-10% nano silica, 3%-8% calcium oxide expansion agent, and 2%-4% water-reducing agent layer.

[0017] Preferably, component D of the two-component epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grout is made from the following raw materials in weight percentages: 40%-60% epoxy resin emulsion, 25%-35% propionate monomer, 10%-15% composite curing agent, and 3%-6% coupling agent. The beneficial effects of this invention are: The repair principle of the high-pressure grouting repair and seepage prevention method for concrete floors provided in this application is as follows: 1. The first grouting in this plan uses a high grouting pressure to lift the locally subsided concrete and physically repair the deformation. 2. In the initial grouting process of this solution, sulfoaluminate cement rapidly hydrates upon contact with water to form ettringite (AFt) crystals, creating a dense, rigid framework that provides an early strength of over 15 MPa within one hour, providing immediate load-bearing capacity for emergency floor repairs. Water-soluble polyurethane prepolymer undergoes chain growth and cross-linking reactions triggered by moisture, forming an elastic gel that expands 3-5 times in volume. This process rapidly fills floor cracks and soil pores. Nano-silica (0.1-0.3 μm particle size) embeds itself into the pores of cement hydration products through physical filling and the pozzolanic effect, reducing porosity and increasing density. Nano-montmorillonite, with its layered structure and cation exchange capacity, adsorbs soil particles and forms a "grout-soil" interface transition zone, significantly enhancing interfacial bonding strength. These two components synergistically achieve multi-level densification from nano to micro scales. Magnesium oxide expanding agent slowly hydrates to generate Mg(OH)2, producing a 1%-2% micro-expansion that precisely compensates for volume shrinkage during the cement hardening stage. A three-dimensional network of reinforcing fibers inhibits the propagation of shrinkage cracks. 3. The initial grouting solution of this scheme achieves the goal of "rapid load-bearing capacity, adaptive filling, and long-term stability" in floor repair by combining the rigid inorganic skeleton (sulfoaluminate cement) with the flexible organic elastic network (polyurethane), along with nano-filling reinforcement and fiber-expansion synergistic crack resistance. It is especially suitable for industrial floors, transportation hubs, and other scenarios with stringent requirements for strength, durability, and construction period. 4. This secondary grouting solution utilizes the synergistic effect of the material's organic-inorganic composite system and phased dual-curing mechanism to achieve efficient sealing and long-term impermeability protection of concrete cracks. Its core principle lies in combining the high bonding strength of epoxy resin, the elastic sealing ability of acrylate, the microscopic permeability of ultrafine cement, and the interface enhancement effect of nanomaterials to form a multi-scale synergistic impermeability barrier. First, ultrafine cement, with its tiny particle size, penetrates deeply into concrete cracks and pores smaller than 0.1 mm. Through hydration reaction, it generates CSH gel and ettringite crystals, rapidly constructing a rigid framework and providing basic mechanical support. The addition of calcium oxide expanding agent further induces micro-expansion (0.5%-1%), compensating for shrinkage stress during the material's hardening stage and preventing interface debonding. Second, the epoxy resin emulsion and acrylate monomers form an organic-inorganic... The composite matrix consists of epoxy resin undergoing a condensation reaction with an amine curing agent to generate a three-dimensional cross-linked network, imparting high bonding strength (≥3MPa) and chemical corrosion resistance to the material. Meanwhile, acrylate, triggered by a redox initiator (such as ammonium persulfate / tetramethylethylenediamine), forms an elastic gel through free radical polymerization. This elastomer can adapt to the minute deformations of the concrete matrix, filling the nanoscale pores not covered by ultrafine cement and blocking water seepage paths. The introduction of nano-silica (particle size 0.1-0.3μm) and coupling agents further optimizes the microstructure of the material. Nano-silica significantly reduces the porosity of the slurry (permeability coefficient ≤10⁻¹¹m / s) through physical filling and the pozzolanic effect, while the coupling agent forms chemical bonds at the concrete-slurry interface, increasing the interfacial bonding strength by more than 30%. The synergistic effect of both achieves multi-level sealing. 5. The secondary grouting solution utilizes the free radical polymerization reaction of acrylate to rapidly trigger the formation of an elastic sealing layer within minutes for immediate water stoppage; the condensation reaction of epoxy resin is gradually completed within hours to days, constructing a high-strength rigid network; staged curing avoids reaction conflicts and balances the requirements of rapid construction and long-term durability; the material forms a dynamic impermeable system through the penetration reinforcement of ultrafine cement, the adaptive sealing of the elastic-rigid composite matrix, and the multi-scale densification of nano-reinforcement, which can resist water pressure (≥1.5MPa), freeze-thaw cycles, and chemical erosion, making it suitable for high-requirement concrete structure repair scenarios; 6. This application utilizes the layout characteristics of concrete floors and the combination of building structural materials with different grouting materials to repair defective floor base layers, forming a waterproof layer on the floor base layer, while simultaneously repairing cracks in the concrete floor, creating a self-waterproof structure and forming two waterproof layers; while repairing defects, it effectively strengthens leaking areas, improving the quality and durability of leak sealing, without damaging the original structure and function of the building, thus meeting the needs of current building development. 7. This invention does not limit the processing equipment and process parameters not mentioned in the above method; any processing equipment and process parameters known to those skilled in the art can be used. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-section of the grouting hole formed for the first grouting in this invention; Figure 2 This is a schematic diagram of the cross-section of the secondary grouting hole in this invention; In the diagram: 1. Water-stop needle, 2. Grouting hole, 3. Floor surface layer, 4. Concrete floor structure layer, 5. Concrete subbase, 6. Anti-seepage layer, 7. Base layer. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-2 A method for high-pressure grouting repair and seepage prevention of concrete floors includes the following steps: S1. First, identify the location that needs to be repaired and clean the ground around the subsidence or crack location to determine the scope of grouting repair. S2. Determine the thickness of the ground structure according to the grouting location. The ground structure includes the ground surface layer 3, the concrete ground structure layer 4, the concrete subbase 5, the impermeable layer 6, and the base layer 7. Determine the depth of the grouting holes and lay out the grouting holes 2. Embed the grouting and water-stopping needles 1 in the grouting holes 2. S3. Use grouting equipment to inject reinforced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material into grouting hole 2 in S2. The injection pressure is 20-40MPa. When the ground slightly settles and is repaired, stop grouting after the grouting volume of each grouting hole 2 is ≤1L / min and the pressure is stable for more than 2 minutes. S4. After the first grouting is completed, let it stand for 1 hour, and after the grouting material at the crack opening is completely cured, remove the original water-stop needle 1, and continue drilling on the basis of the original grouting hole 2, and install a new water-stop needle 1. S5. Use grouting equipment to inject epoxy-acrylate / ultrafine cement composite double-curing anti-seepage grouting material into the new water-stop needle 1 in S4. The grouting pressure is 4-6 MPa. When the grouting volume of each new grouting hole 2 is ≤1L / min and the pressure is stable for more than 1min, stop grouting. S6. After successful repair, remove the water-stop needle 1 and seal the new grouting hole 2 with a leak-stopping agent to repair the original ground surface layer of the grouting hole 2.

[0021] In this invention, the grouting range in S1 extends outward by more than 300 mm from the location of the subsidence or crack to form a floor defect range, thereby ensuring that all floor defect locations are covered.

[0022] In this invention, the grouting hole 2 in S2 reaches a depth of not less than 500mm to the road base layer, and the grouting hole 2 in S5 penetrates into the concrete subbase 5 by more than 1 / 2 of its thickness; if the ground design does not have a concrete subbase 5, the grouting hole 2 penetrates into the concrete floor structure layer 4 by more than 2 / 3 of its thickness.

[0023] In this invention, when the floor defect is sheet-like, the grouting holes are arranged in a quincunx pattern; when the floor defect is linear, the grouting holes are arranged along the joint; the spacing between the grouting holes 2 is ≤500mm; and the distance between the grouting holes 2 located at the edge and the edge of the floor defect is ≤200mm.

[0024] In this invention, the reinforced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material contains two components, A and B. When using it, a certain amount of water is added according to the water-cement ratio of 0.25-0.35 and stirred evenly before use. Component A consists of rapid-hardening sulfoaluminate cement, ultrafine slag powder with a specific surface area ≥600m² / kg, magnesium oxide expanding agent, silica fume, reinforcing fiber, nano-montmorillonite, water-reducing agent and accelerator; Component B consists of waterborne polyurethane prepolymer.

[0025] In this invention, component A of the reinforced sulfoaluminate-polyurethane composite rapid-setting micro-expansion floor reinforcement grouting material is made from the following raw materials by weight percentage: 45%-55% rapid-hardening sulfoaluminate cement, 15%-25% ultrafine slag powder, 6%-10% magnesium oxide expansion agent, 5%-10% silica fume, 1%-2% reinforcing fiber, 3%-5% nano-montmorillonite, 1%-1.5% water-reducing agent, and 0.5%-1% accelerator.

[0026] In this invention, the epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grouting material comprises two components, C and D; Component C is a powder, consisting of ultrafine cement, calcium oxide expanding agent, nano silica, and water-reducing agent; Component D is a slurry, consisting of epoxy resin emulsion, propionate monomer, composite curing agent, and coupling agent; when using, add a certain amount of water at a water-cement ratio of 0.3-0.4 and stir evenly before use.

[0027] In this invention, the C component of the two-component epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grout is made from the following raw materials in weight percentages: 70%-80% ultrafine cement, 3-10% nano silica, 3%-8% calcium oxide expansion agent, and 2%-4% water-reducing agent layer.

[0028] In this invention, the D component of the two-component epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grout is made from the following raw materials in weight percentages: 40%-60% epoxy resin emulsion, 25%-35% propionate monomer, 10%-15% composite curing agent, and 3%-6% coupling agent.

[0029] Example 1: like Figure 1 , Figure 2 As shown: The concrete floor high-pressure grouting repair and seepage prevention construction scheme designed according to the present invention includes the following specific steps: S1. First, identify the location that needs to be repaired and clean the ground around the subsidence or crack location to determine the scope of grouting repair. S2. Determine the thickness of the ground structure according to the grouting location, clarify the depth of drilling grouting holes 2, and lay out grouting holes 2; and embed grouting and water-stopping needles 1 in grouting holes 2. S3. Use grouting equipment to inject reinforced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material into grouting hole 2 of S2. The injection pressure is 40MPa. When the ground slightly settles, stop grouting after the grouting volume of each grouting hole is ≤1L / min and the pressure is stable for more than 2 minutes. S4. After the first grouting is completed for 1 hour and the grouting material at the crack opening is completely cured, remove the original water-stop needle 1, continue drilling on the basis of the original grouting hole 2, and install a new water-stop needle 1. S5. Use grouting equipment to inject epoxy-acrylate / ultrafine cement composite double-curing anti-seepage grouting material into the new water-stop needle 1 in S4. The grouting pressure is 6 MPa. When the grouting volume of each grouting hole is ≤1 L / min and the pressure is stable for more than 1 minute, stop grouting. S6. After successful repair, remove the water-stop needle 1 and seal the grouting hole 2 in S5 with a leak-stopping agent, and repair the original ground surface layer of the grouting hole 2.

[0030] Example 2: like Figure 1 , Figure 2 As shown: The concrete floor high-pressure grouting repair and seepage prevention construction scheme designed according to the present invention includes the following specific steps: S1. First, identify the location that needs to be repaired and clean the ground around the subsidence or crack location to determine the scope of grouting repair. S2. Determine the thickness of the ground structure according to the grouting location, clarify the depth of drilling grouting holes 2, and lay out grouting holes 2; and embed grouting and water-stopping needles 1 in grouting holes 2. S3. Use grouting equipment to inject reinforced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material into the grouting holes of S2. The injection pressure is 20MPa. When the ground slightly settles, the grouting volume of each grouting hole is ≤1L / min and the pressure is stable for more than 2 minutes before stopping the grouting. S4. After the first grouting is completed for 1 hour and the grouting material at the crack opening is completely cured, remove the original water-stop needle 1, continue drilling on the basis of the original grouting hole 2, and install a new water-stop needle 1. S5. Use grouting equipment to inject epoxy-acrylate / ultrafine cement composite double-curing anti-seepage grouting material into the new water-stop needle 1 in S4. The grouting pressure is 4 MPa. When the grouting volume of each grouting hole 2 is ≤1 L / min and the pressure is stable for more than 1 min, stop grouting. S6. After successful repair, remove the water-stop needle 1 and seal the grouting hole 2 in S5 with a leak-stopping agent, and repair the original ground surface layer of the grouting hole 2.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for high-pressure grouting repair and seepage prevention of concrete floors, characterized in that, Includes the following steps: S1. First, identify the location that needs to be repaired and clean the ground around the subsidence or crack location to determine the scope of grouting repair. S2. Determine the thickness of the ground structure according to the grouting location. The ground structure includes the ground surface layer (3), concrete ground structure layer (4), concrete cushion layer (5), anti-seepage layer (6) and base layer (7); determine the depth of the drilling grouting holes and lay out the grouting holes (2); and embed the grouting water-stop needle (1) in the grouting holes (2). S3. Use grouting equipment to inject reinforced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material into the grouting hole (2) in S2. The grouting pressure is 20-40MPa. When the ground slightly settles and is repaired, the grouting volume of each grouting hole (2) is ≤1L / min and the pressure is stable for more than 2 minutes before stopping the grouting. S4. After the first grouting is completed, let it stand for 1 hour and after the grouting material at the crack opening is completely cured, remove the original water-stop needle (1), and continue drilling on the basis of the original grouting hole (2), and install a new water-stop needle (1). S5. Use grouting equipment to inject epoxy-acrylate / ultrafine cement composite double-curing anti-seepage grouting material into the new water-stop needle (1) in S4. The grouting pressure is 4-6 MPa. When the grouting volume of each new grouting hole (2) is ≤1L / min and the pressure is stable for more than 1min, stop grouting. S6. After successful repair, remove the water-stop needle (1) and seal the new grouting hole (2) with the leak-stopping agent to repair the original ground surface layer of the grouting hole (2).

2. The method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 1, characterized in that: The grouting range in S1 extends outward by more than 300 mm from the location of the subsidence or crack to form a floor defect range, ensuring that all floor defect locations are covered.

3. The method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 1, characterized in that: The grouting hole (2) in S2 reaches a depth of not less than 500mm to the road base layer, and the grouting hole (2) in S5 penetrates into the concrete subbase (5) to a depth of more than 1 / 2 of its thickness; if the ground design does not have a concrete subbase (5), the grouting hole (2) penetrates into the concrete floor structure layer (4) to a depth of more than 2 / 3 of its thickness.

4. The method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 1, characterized in that: When the floor defect is sheet-like, the grouting holes are arranged in a plum blossom pattern; when the floor defect is linear, the grouting holes are arranged along the joint; the spacing between the grouting holes (2) is ≤500mm; the distance between the grouting holes (2) located at the edge and the edge of the floor defect is ≤200mm.

5. The method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 1, characterized in that: The enhanced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material contains two components, A and B. When using it, add a certain amount of water according to the water-cement ratio of 0.25-0.35 and stir evenly before use. Component A consists of rapid-hardening sulfoaluminate cement, ultrafine slag powder with a specific surface area ≥600m² / kg, magnesium oxide expanding agent, silica fume, reinforcing fiber, nano-montmorillonite, water-reducing agent and accelerator; Component B consists of waterborne polyurethane prepolymer.

6. The method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 5, characterized in that: The enhanced sulfoaluminate-polyurethane composite quick-setting micro-expansion floor reinforcement grouting material, component A, is made from the following raw materials by weight percentage: 45%-55% rapid-hardening sulfoaluminate cement, 15%-25% ultrafine slag powder, 6%-10% magnesium oxide expanding agent, 5%-10% silica fume, 1%-2% reinforcing fiber, 3%-5% nano-montmorillonite, 1%-1.5% water-reducing agent, and 0.5%-1% accelerator.

7. The method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 1, characterized in that: The epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grouting material contains two components, C and D. Component C is a powder, consisting of ultrafine cement, calcium oxide expanding agent, nano silica, and water-reducing agent; Component D is a slurry, consisting of epoxy resin emulsion, propionate monomer, composite curing agent, and coupling agent; when using, add a certain amount of water at a water-cement ratio of 0.3-0.4 and stir evenly before use.

8. A method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 7, characterized in that: The C component of the two-component epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grout is made from the following raw materials in weight percentages: 70%-80% ultrafine cement, 3-10% nano silica, 3%-8% calcium oxide expansion agent, and 2%-4% water-reducing agent layer.

9. A method for high-pressure grouting repair and seepage prevention of concrete floors according to claim 7, characterized in that: The two-component epoxy-acrylate / ultrafine cement composite dual-curing anti-seepage grouting material, component D, is made from the following raw materials in weight percentages: 40%-60% epoxy resin emulsion, 25%-35% propionate monomer, 10%-15% composite curing agent, and 3%-6% coupling agent.

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