A porous nanomaterial and acrylic salt composite grouting material and a preparation method thereof

Abstract

The application provides a porous nanomaterial and acrylic salt composite grouting material and a preparation method thereof. The composite grouting material comprises A component and B component; the A component is prepared from the following raw materials: 0.5-2.5 parts of porous nanomaterial, 10-15 parts of acrylic acid, 1-5 parts of metal oxide and / or metal hydroxide, 0.5-2.5 parts of accelerator, 1.0-2.0 parts of crosslinking agent, 0.01-0.5 parts of dispersant, 0.01-0.1 parts of surfactant, 0.05-0.5 parts of polymerization inhibitor and 10-30 parts of water; the B component is prepared from the following raw materials: 0.5-2.5 parts of initiator and 50-70 parts of water. The application utilizes the similar compatibility of acrylic acid and porous nanomaterial to improve the dispersion capacity, and further adds dispersant and surfactant to further enhance the dispersibility of porous nanomaterial such as porous nanosilica, and improves the long-term storage stability of the composite monomer solution.

Description

Technical Field

[0001] This invention relates to a porous nanomaterial and acrylate composite grouting material and its preparation method, belonging to the field of building materials technology. Background Technology

[0002] With the rapid development of urbanization, a large number of concrete buildings have emerged. However, due to external forces, defects or cracks may occur inside the building structure. Excessive structural deformation and damage can cause water to directly or indirectly enter the underground works, leading to a series of problems such as water seepage, leakage, and water intrusion. This, in turn, affects the durability of the building structure. Therefore, reasonable and effective treatment of water seepage and leakage has become an important topic.

[0003] Grouting for leak sealing has always been considered an effective measure. Grouts used for leak sealing can be classified into inorganic materials and organic polymers according to their chemical composition. Inorganic materials include cement, cement-mortar, cement-water glass, clay, etc. Organic polymers mainly include polyurethane, epoxy resin, acrylamide, urea-formaldehyde resin, etc., as well as acrylate grouts, which have emerged in recent years. Acrylate grouting materials are two-component or multi-component homogeneous liquid grouting materials made with acrylate monomer aqueous solution as the main agent and appropriate amounts of crosslinking agent, initiator, accelerator, water and / or modifier.

[0004] CN108299599A discloses an acrylate aqueous solution grouting material and its preparation method. Component A includes an acrylate aqueous solution, a crosslinking agent, and an accelerator; component B includes an aqueous polymer emulsion, water, and an initiator. It features low viscosity, high strength, and low shrinkage. Although the gelation time of acrylate is adjustable, the film-forming time of the aqueous polymer emulsion is long. A large time difference between the two can easily cause grout stratification, significantly reducing the performance of the grouting material. CN109942739A discloses a water glass-acrylate composite gel plugging agent and its preparation method. Component A includes acrylate monomers, water glass, a crosslinking agent, and an accelerator; component B includes an initiator and water. Water glass is introduced based on acrylate, but water glass is generally alkaline and exhibits dehydration, shrinkage, and corrosion during use, causing environmental pollution and making it unsuitable for long-term use. More importantly, the mechanical properties of water glass are not ideal; it is brittle and has low gel strength, limiting its application in certain scenarios. CN113788664A discloses a mine fire prevention and extinguishing sealing grouting material mainly composed of acrylate and sodium silicate. Component A includes acrylate, curing agent, initiator, stabilizer, pH adjuster, accelerator and water. Component B includes alkali metal silicate, reinforcing agent and water. The pH adjuster is soda ash or 10% sodium hydroxide solution. The strong alkalinity of component A not only affects the stability of the monomer solution but also limits its use under acidic conditions. In addition, sodium silicate has the disadvantages of low mechanical strength, high brittleness, poor elasticity, and easy to cause drying shrinkage or expansion cracking. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a composite grouting material that combines porous nanomaterials with acrylate monomers to obtain a composite grouting material with excellent seepage prevention and plugging functions.

[0006] To achieve the above objectives, the present invention provides a porous nanomaterial and acrylate composite grouting material, wherein the composite grouting material comprises component A and component B;

[0007] Component A is made from the following raw materials in parts by weight: 0.5 to 2.5 parts of porous nanomaterials, 10 to 15 parts of acrylic acid, 1 to 5 parts of metal oxides and / or metal hydroxides, 0.5 to 2.5 parts of accelerators, 1.0 to 2.0 parts of crosslinking agents, 0.01 to 0.5 parts of dispersants, 0.01 to 0.1 parts of surfactants, 0.05 to 0.5 parts of polymerization inhibitors, and 10 to 30 parts of water;

[0008] Component B is made from the following raw materials in parts by weight: 0.5 to 2.5 parts of initiator and 50 to 70 parts of water.

[0009] This invention prepares acrylate monomers using acrylic acid and metal oxides and / or metal hydroxides as reactants, and synthesizes porous nanomaterials and acrylate composite monomers in situ with porous nanomaterials. Using an oxidation-reduction system and with the aid of a crosslinking agent, an acrylate gel with good seepage prevention and plugging function is obtained through free radical polymerization reaction.

[0010] In the above-mentioned composite grouting material, preferably, the acrylate monomer is prepared by neutralization reaction of acrylic acid with metal oxides and / or metal hydroxides as raw materials, and is an unsaturated carboxylic acid metal salt formed by insoluble divalent or higher metals.

[0011] In the above-mentioned composite grouting material, preferably, the metal oxide is selected from one or a combination of two or more of magnesium oxide, calcium oxide, and zinc oxide; the metal hydroxide is selected from one or a combination of two or more of magnesium hydroxide, calcium hydroxide, and zinc hydroxide.

[0012] In the above-mentioned composite grouting material, preferably, the acrylate monomers include one or a combination of two or more of magnesium acrylate, calcium acrylate, zinc acrylate, magnesium methacrylate, calcium methacrylate and zinc methacrylate; more preferably, magnesium acrylate and calcium acrylate, and even more preferably magnesium acrylate.

[0013] In the above-mentioned composite grouting material, preferably, the porous nanomaterial is a microporous material with a pore size of 0.2 to 2 nm or a mesoporous material with a pore size of 2 to 50 nm, such as zeolite, zeolite-like material, molecular sieve, activated carbon, aerosol, layered clay, M41S series ordered mesoporous material, SBA series ordered mesoporous material, MSU series ordered mesoporous material, etc., or a combination of two or more of them.

[0014] In the above-mentioned composite grouting material, preferably, the porous nanomaterial is porous nano-silica; more preferably, the specific surface area of ​​the porous nano-silica is 20-2000 m². 2 / g (preferably 719m) 2 The average pore size is 2–100 nm (preferably 4.5 nm), and the total pore volume is 0.2–10 cm³. 3 / g (preferably 0.822cm) 3 / g).

[0015] In the above-mentioned composite grouting material, preferably, the accelerator is a fatty amine, more preferably, one or a combination of two or more of the following: triethanolamine, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetraethylethylenediamine, N,N,N',N'-tetramethylmethylenediamine, N,N,N',N'-tetramethylpropylenediamine, N,N,N',N'-tetramethylbutyldiamine, dimethylamine, diethylamine, di-n-propylamine, di-n-butylamine, triethylamine, morpholine, N-methylmorpholine, N-ethylmorpholine, piperidine, N-isopropylhydroxylamine, and N,N'-diethylhydroxylamine, and even more preferably, N,N,N',N'-tetramethylethylenediamine.

[0016] In the above-mentioned composite grouting material, preferably, the crosslinking agent is one or a combination of two or more of unsaturated ester crosslinking agents, amide crosslinking agents and ether crosslinking agents, more preferably, one or a combination of two or more of 1,4-butanediol diacrylate, ethylene glycol diacrylate, pentaerythritol diacrylate, hydroxyethyl acrylate, N,N-methylenebisacrylamide, ethylene glycol diallyl ether and bisphenol A diallyl ether, and even more preferably, N,N'-methylenebisacrylamide and ethylene glycol diacrylate.

[0017] In the above-mentioned composite grouting material, preferably, the surfactant is sodium dodecylbenzenesulfonate and / or sodium dodecyl sulfate, etc.

[0018] In the above-mentioned composite grouting material, preferably, the dispersant is a polycarboxylate dispersant or the like.

[0019] In the above-mentioned composite grouting material, preferably, the polymerization inhibitor is one or a combination of two or more of hydroquinone and p-hydroxyanisole.

[0020] In the above-mentioned composite grouting material, preferably, the initiator is one or a combination of two or more of the following: ammonium persulfate, potassium persulfate, sodium persulfate, hydrogen persulfate, hydrogen peroxide, and acetophenone peroxide; more preferably, it is one or a combination of two or more of the following: ammonium persulfate, potassium persulfate, and sodium persulfate.

[0021] The composite grouting material provided by this invention is a porous nanomaterial and acrylate composite grouting material with low viscosity, controllable gelation time, good mechanical properties, and no cracking after multiple cycles of drying shrinkage or water expansion.

[0022] This invention also provides a method for preparing a composite grout of porous nanomaterials and acrylates, comprising the following steps:

[0023] S1. Preparation of porous nanomaterial and acrylate composite monomer solution: Weigh porous nanomaterial, surfactant, dispersant, polymerization inhibitor, acrylic acid and water, stir to disperse evenly, then slowly add metal oxide and / or metal hydroxide, controlling the neutralization ratio of acrylic acid at 60-100 mol%, then add the remaining metal oxide and / or metal hydroxide to adjust the acrylic acid in the reaction system, and finally add the remaining acrylic acid to react and prepare porous nanomaterial and acrylate composite monomer solution; This method can effectively prevent the self-polymerization reaction of acrylic acid at high temperature and improve the yield;

[0024] S2. In step S1, an accelerator and a crosslinking agent are added to the porous nanomaterial and acrylate composite monomer solution to form component A;

[0025] S3. Add the initiator to water to form component B.

[0026] According to a specific embodiment of the present invention, preferably, the above preparation method includes the following specific steps:

[0027] S1. Preparation of porous nanomaterial and acrylate composite monomer solution: Weigh porous nanomaterial, surfactant, dispersant, polymerization inhibitor, acrylic acid and water into a reactor according to the mass fraction. Turn on the homogenizer and maintain the speed at 300-800 r / min (preferably 500 r / min). After stirring to make it evenly dispersed, adjust the speed of the homogenizer to 1000-1500 r / min (preferably 1200 r / min). Then slowly add metal oxide and / or metal hydroxide, control the neutralization ratio of acrylic acid to about 60-100 mol%, and then add the remaining metal oxide and / or metal hydroxide to adjust the acrylic acid in the reaction system. Continue to stir at high speed and age. Finally, add the remaining acrylic acid to react and prepare the porous nanomaterial and acrylate composite monomer solution.

[0028] S2. In step S1, an accelerator and a crosslinking agent are added to the porous nanomaterial and acrylate composite monomer solution to form component A;

[0029] S3. Add the initiator to water to form component B;

[0030] S4. Pour component A and component B into the two-component grouting machine respectively, and open the valve at the same time to quickly mix component A and component B to obtain composite grouting material.

[0031] According to a specific embodiment of the present invention, preferably, in S4, the volume ratio of component A to component B is 0.5 to 2:1, more preferably 1:1.

[0032] According to a specific embodiment of the present invention, preferably, step S4 can be performed before the grouting is used.

[0033] This invention also provides applications of the above-mentioned porous nanomaterials and acrylate composite grouting materials in seepage prevention curtain grouting of building structures that are permanently subjected to water pressure, controlling water penetration and solidifying loose soil waterproofing, seepage prevention and plugging of tunnels, sealing of tunnel linings, seepage prevention and plugging of underground buildings, kitchens or bathrooms, seepage prevention and plugging of cracks in concrete and rock structures, and control of water in soil during tunnel excavation.

[0034] According to a specific embodiment of the present invention, preferably, the permanently pressure-bearing building structure includes a dam and / or a reservoir.

[0035] According to a specific embodiment of the present invention, preferably, the underground building includes a basement, a kitchen, and a bathroom.

[0036] According to a specific embodiment of the present invention, the application includes the step of mixing and injecting component A and component B using a two-component grouting method. Specifically, a two-component grouting machine is used to inject component A and component B together into the leaking or water-accumulated area. Preferably, the volume ratio of component A to component B is 0.5 to 2:1, more preferably 1:1.

[0037] This invention uses an in-situ synthesis method to synthesize porous nanomaterials and acrylate composite grouting materials, effectively improving the dispersibility of porous nanomaterials and uniformly confining them in the acrylate gel network structure, thereby increasing the density of the gel. At the same time, some surface groups form hydrogen bonds with the gel, and the Si-O-Si network structure of porous nano-silica works synergistically with the network structure of the gel to increase the overall crosslinking density of the gel and improve the mechanical properties of the composite grouting material.

[0038] In this invention, the large specific surface area, high surface energy, and numerous nanopore structures of porous nanomaterials can effectively resist cracking caused by stress deformation of gels due to drying shrinkage or water absorption expansion.

[0039] In this invention, the porous nanomaterial is preferably porous nano-silica, whose particles have a honeycomb structure and adjustable pore size, exhibiting high specific surface area, high pore volume, and uniform nanoscale structure. However, due to their large specific surface area and high surface energy, nanomaterials are prone to agglomeration in solution, reducing their effectiveness. Unlike directly blending porous nanomaterials with acrylate grout, which results in extremely poor dispersibility and almost no effect, this invention synthesizes porous nanomaterials and acrylate grout in situ by blending porous nanomaterials with acrylic acid. The similarity and compatibility between acrylic acid and porous nanomaterials such as porous silica improves their dispersibility. Furthermore, the addition of polycarboxylic acid dispersants and surfactants further enhances the dispersibility of porous nanomaterials such as porous nano-silica, thereby improving the long-term storage stability of the composite monomer solution. More importantly, during the gel formation process of acrylate grout, porous nanomaterials such as porous silica are in situ confined within the gel network structure, increasing the density of the gel. Simultaneously, some surface groups of the porous silica can form hydrogen bonds with the gel. Utilizing the synergistic effect of the Si-O-Si network structure of the porous silica and the network structure of the gel, the overall cross-linking density of the gel is increased, significantly improving the compressive and tensile strength of the solidified sand and enhancing the mechanical properties of the acrylate grout. It is well known that excessively high cross-linking density leads to excessive rigidity, making it prone to expansion or contraction cracking under external deformation forces. However, porous nanomaterials such as porous silica confined within the gel network structure can form a diffusion network due to the high porosity of the particles. Furthermore, the high surface area leads to an effective stress transfer mechanism, effectively resisting cracking caused by stress deformation due to drying shrinkage or water absorption expansion of the gel.

[0040] The porous nanomaterials and acrylate composite grouting materials provided by this invention have significant advantages in terms of mechanical properties and resistance to shrinkage, expansion and cracking. Detailed Implementation

[0041] In order to provide a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the technical solution of the present invention will now be described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0042] Example 1

[0043] This embodiment provides a porous nanomaterial and acrylate composite grouting material, which is prepared through the following steps:

[0044] Weigh out 2.64g of porous nano-silica (specific surface area 719m²). 2 / g, average pore size is 4.5nm, and total pore volume is 0.822cm³. 3In a reactor, 0.1 g of sodium dodecylbenzenesulfonate surfactant, 1.00 g of polycarboxylic acid dispersant, 0.54 g of hydroquinone inhibitor, 65.00 g of acrylic acid, and 170.00 g of water were added. The homogenizer was turned on and kept at a speed of 500 r / min. After stirring to disperse the mixture evenly, the speed of the homogenizer was adjusted to 1200 r / min. 14.48 g of magnesium oxide was slowly added, and the neutralization ratio of acrylic acid was controlled at about 80 mol%. The reaction temperature was always controlled below 30℃. Then, 4.52 g of magnesium oxide was added to adjust the acrylic acid in the reaction system. Stirring and aging were continued. Finally, 3.40 g of acrylic acid was added to form a porous nanomaterial and magnesium acrylate monomer solution.

[0045] Add 5.50g of accelerator N,N,N',N'-tetramethylethylenediamine and 5.50g of crosslinking agent ethylene glycol diacrylate to form component A;

[0046] Dissolve 5.50g of ammonium persulfate in 270.00g of water to form component B;

[0047] Component A and Component B are poured into a two-component grouting machine, and the valves are opened simultaneously to quickly mix Component A and Component B to obtain a porous nanomaterial and acrylate composite grouting material, wherein the volume ratio of Component A to Component B is 1:1.

[0048] Example 2

[0049] This embodiment provides a porous nanomaterial and acrylate composite grout, which differs from Embodiment 1 only in that the amount of porous nano silica added is 5.14g.

[0050] Example 3

[0051] This embodiment provides a porous nanomaterial and acrylate composite grout, which differs from Embodiment 1 only in that the amount of porous nano silica added is 10.55g.

[0052] Comparative Example 1

[0053] This comparative example provides an acrylate grout, which differs from Example 1 in that: a magnesium acrylate monomer solution is prepared without the addition of porous nanomaterials, dispersants, and surfactants;

[0054] Add 5.50g of accelerator N,N,N',N'-tetramethylethylenediamine and 5.50g of crosslinking agent ethylene glycol diacrylate to form component A;

[0055] Dissolve 5.50g of ammonium persulfate in 270.00g of water to form component B;

[0056] Component A and Component B are poured into a two-component grouting machine, and the valves are opened simultaneously to quickly mix Component A and Component B to obtain acrylate grouting material, wherein the volume ratio of Component A to Component B is 1:1.

[0057] Comparative Example 2

[0058] This comparative example provides a composite grouting material, specifically comprising:

[0059] As shown in Comparative Example 1, a magnesium acrylate monomer solution was prepared:

[0060] Add 5.50g of accelerator N,N,N',N'-tetramethylethylenediamine, 5.50g of crosslinking agent ethylene glycol diacrylate, 0.1g of surfactant sodium dodecylbenzenesulfonate, 1.00g of polycarboxylate dispersant, and 5.14g of porous nano-silica (specific surface area 719m²) to a magnesium acrylate monomer solution. 2 / g, average pore size is 4.5nm, and total pore volume is 0.822cm³. 3 / g), forming component A.

[0061] Dissolve 5.50g of ammonium persulfate in 270.00g of water to form component B;

[0062] Component A and Component B are poured into a two-component grouting machine, and the valves are opened simultaneously to quickly mix Component A and Component B to obtain acrylate grouting material, wherein the volume ratio of Component A to Component B is 1:1.

[0063] The performance test results of the comparative examples and embodiments are shown in Table 1. The gel time, pH, viscosity, water swelling rate, permeability coefficient and compressive strength of the sand fixation body were tested according to the test methods in JCT 2037-2010.

[0064] Monomer storage stability: The appearance of the solution is observed with the naked eye after the monomer solution has been left to stand for several weeks.

[0065] Tensile strength test: The specimen is punched into a standard dumbbell-shaped sheet for tensile testing, and the tensile test is performed on a microcomputer-controlled electronic universal testing machine.

[0066] The cracking test after 20 cycles was conducted as follows: The slurry was soaked in a container filled with water for 7 days to allow it to fully absorb water, and then placed in an 80℃ oven to dry for 2 days to allow it to fully dehydrate. The results were then observed and recorded. This was recorded as one experiment, and the experiment was repeated 20 times. Cracks were observed visually.

[0067] Table 1 Performance Test Table

[0068]

[0069]

[0070] As can be seen from the data in Table 1, the porous nanomaterial synthesized in situ in this invention and the acrylate composite grouting material have significantly improved mechanical properties and resistance to shrinkage, expansion and cracking after multiple cycles. However, it is important to note that the amount of porous nanomaterial added should be reasonably controlled. If the amount added is too small, the effect of resisting shrinkage, expansion and cracking will be poor. If the amount added is too large, the monomer solution will be unstable during storage and will easily agglomerate and precipitate. The amount added should be controlled within 0.9% to 3.6% (as a percentage of the mass of component A), with 1.8% showing relatively better results.

Claims

1. A porous nanomaterial and acrylate composite grouting material, wherein, This composite grouting material contains component A and component B; Component A is made from the following raw materials in parts by weight: 0.5-2.5 parts porous nanomaterials, 10-15 parts acrylic acid, 1-5 parts metal oxides and / or metal hydroxides, 0.5-2.5 parts accelerators, 1.0-2.0 parts crosslinking agents, 0.01-0.5 parts dispersants, 0.01-0.5 parts surfactants, 0.05-0.5 parts polymerization inhibitors, and 10-30 parts water; Component B is made from the following raw materials in parts by weight: 0.5 to 2.5 parts of initiator and 50 to 70 parts of water; The porous nanomaterial is porous nano-silica, and the specific surface area of ​​the porous nano-silica is 20~2000 m². 2 / g, with an average pore size of 2~100 nm and a total pore volume of 0.2~10 cm³. 3 / g; The amount of porous nano-silica added is controlled to be 0.9-3.6% of the mass of component A; The preparation method of component A includes the following steps: S1. Weigh out porous nanomaterials, surfactants, dispersants, polymerization inhibitors, acrylic acid and water, stir to disperse them evenly, slowly add metal oxides and / or metal hydroxides, control the neutralization ratio of acrylic acid to 60~100 mol%, then add the remaining metal oxides and / or metal hydroxides to adjust the acrylic acid in the reaction system, and finally add the remaining acrylic acid to react and prepare a porous nanomaterials and acrylate composite monomer solution. S2. In step S1, an accelerator and a crosslinking agent are added to the porous nanomaterial and acrylate composite monomer solution to form component A.

2. The composite grouting material according to claim 1, wherein, The metal oxide is selected from one or a combination of two or more of magnesium oxide, calcium oxide, and zinc oxide. The metal hydroxide is selected from one or a combination of two or more of magnesium hydroxide, calcium hydroxide, and zinc hydroxide.

3. The composite grouting material according to claim 1, wherein, The specific surface area of ​​the porous nano-silica is 719 m². 2 / g, with an average pore size of 4.5 nm and a total pore volume of 0.822 cm³. 3 / g.

4. The composite grouting material according to claim 1, wherein, The accelerator is a fatty amine.

5. The composite grouting material according to claim 4, wherein, The accelerator is one or a combination of two or more of the following: triethanolamine, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetraethylethylenediamine, N,N,N',N'-tetramethylmethylenediamine, N,N,N',N'-tetramethylpropylenediamine, N,N,N',N'-tetramethylbutyldiamine, dimethylamine, diethylamine, di-n-propylamine, di-n-butylamine, triethylamine, morpholine, N-methylmorpholine, N-ethylmorpholine, piperidine, N-isopropylhydroxylamine, and N,N'-diethylhydroxylamine.

6. The composite grouting material according to claim 1, wherein, The crosslinking agent is one or a combination of two or more of the following: unsaturated ester crosslinking agents, amide crosslinking agents, and ether crosslinking agents.

7. The composite grouting material according to claim 6, wherein, The crosslinking agent is one or a combination of two or more of 1,4-butanediol diacrylate, ethylene glycol diacrylate, pentaerythritol diacrylate, hydroxyethyl acrylate, N,N-methylenebisacrylamide, ethylene glycol diallyl ether, and bisphenol A diallyl ether.

8. The composite grouting material according to claim 1, wherein, The surfactant is sodium dodecylbenzenesulfonate and / or sodium dodecyl sulfate.

9. The composite grouting material according to claim 1, wherein, The dispersant is a polycarboxylic acid type dispersant.

10. The composite grouting material according to claim 1, wherein, The polymerization inhibitor is one or a combination of two or more of hydroquinone and p-hydroxyanisole.

11. The composite grouting material according to claim 1, wherein, The initiator is one or a combination of two or more of the following: ammonium persulfate, potassium persulfate, sodium persulfate, hydrogen persulfate, hydrogen peroxide, and acetophenone peroxide.

12. A method for preparing the porous nanomaterial and acrylate composite grout according to any one of claims 1-11, comprising the following steps: S1. Weigh out porous nanomaterials, surfactants, dispersants, polymerization inhibitors, acrylic acid and water, stir to disperse them evenly, slowly add metal oxides and / or metal hydroxides, control the neutralization ratio of acrylic acid to 60~100 mol%, then add the remaining metal oxides and / or metal hydroxides to adjust the acrylic acid in the reaction system, and finally add the remaining acrylic acid to react and prepare a porous nanomaterials and acrylate composite monomer solution. S2. An accelerator and a crosslinking agent are added to the porous nanomaterial and acrylate composite monomer solution in step S1 to form component A; S3. Add the initiator to water to form component B.

13. The application of the porous nanomaterial and acrylate composite grouting material according to any one of claims 1-11 in the application of seepage prevention curtain grouting of building structures that are permanently subjected to water pressure, controlling water penetration and solidifying loose soil waterproofing, seepage prevention and plugging of tunnels, sealing of tunnel linings, seepage prevention and plugging of underground buildings or kitchens or bathrooms, seepage prevention and plugging of cracks in concrete and rock structures, and control of water in soil during tunnel excavation.

14. The application according to claim 13, wherein, The permanent water-pressure-bearing structures include dams and / or reservoirs; The underground structures include basements, kitchens, and bathrooms.

15. The application according to claim 13, wherein, The application includes the step of mixing and injecting component A and component B using two-component grouting.

16. The application according to claim 15, wherein, The volume ratio of component A to component B is 0.5 to 2:

1.

17. The application according to claim 16, wherein, The volume ratio of component A to component B is 1:1.

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