A permeable crystalline waterproof coating and its usage method

Abstract

The present invention provides a permeable crystalline waterproof coating and its using method. In terms of parts by weight, its raw materials include 50 - 80 parts of portland cement, 40 - 60 parts of modified acrylic polymer emulsion, 10 - 30 parts of quartz sand, 1 - 3 parts of calcium chloride, 1 - 2 parts of sodium carbonate, 2 - 3 parts of sodium silicate, 0.05 - 0.2 parts of complexing agent, 0.1 - 0.5 parts of methyl cellulose, and 25 - 50 parts of water. The permeable crystalline waterproof coating provided by the present invention uses modified acrylic polymer emulsion and modified potassium methyl silicate as raw materials for the waterproof coating. The raw materials are environmentally friendly and will not cause harm to the environment, improving the overall waterproof performance of the waterproof coating. At the same time, the strength and alkali resistance of the waterproof coating are also improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waterproof coatings, and particularly relates to a penetrating crystalline waterproof coating and its usage method. Background Art

[0002] Concrete is a heterogeneous, porous material with a microscopic crack structure and a rough surface, and it has high permeability. It can adsorb water through capillaries. The entry of external water will cause a significant decline in the durability of concrete, resulting in cracking, water seepage, etc., bringing certain potential safety hazards.

[0003] Cement-based penetrating crystalline waterproof coatings were developed and invented by German chemist Lauritz Jensen in 1942 during the practice of solving the water seepage problem of cement ships. Subsequently, with the development of technology, researchers began to add various additives and synthetic polymer emulsions to cement-based penetrating crystalline waterproof coatings to enable them to have better durability and at the same time possess the advantages of high elasticity of synthetic polymer materials.

[0004] Chinese Patent No. 201110349120 discloses a cement-based penetrating crystalline waterproof coating, its preparation method and construction method, which are prepared from the following raw materials in weight percentages: cement 65 - 70%; modified bentonite 3 - 10%; modified sodium silicate 2 - 5%; dispersant 1 - 5%; penetrant 0.5 - 1%; silica fume 2 - 10%; quartz sand 15 - 25%. It can repair the fine cracks at the concrete interface and effectively inhibit water seepage and moisture return at the base interface.

[0005] Chinese Patent No. 2023112242890 discloses a cement-based penetrating crystalline waterproof coating, its preparation method and application, which are composed of the following components in weight percentages: cement 61.29%

[0006] -61.91%, retarder 0.03% - 0.18%, calcium chloride 0.33% - 1.32%, water reducer 0.15% - 0.76%, sodium silicate 1.99% - 2.01%, sodium carbonate 1.32% - 1.34%, EDTA 0.33%, sodium citrate 0.2%, and the rest is quartz sand. By using low-cost raw materials and adjusting the proportion of each component, the best utilization rate is achieved.

[0007] The above-mentioned cement-based penetrating crystalline waterproof coatings improve the utilization rate of raw materials and the waterproof effect by adjusting the raw material ratio. However, the strength, alkali resistance and other properties of the waterproof coatings have not been significantly improved.

[0008] Therefore, the current urgent technical problem to be solved is how to improve the strength and alkali resistance of waterproof coatings, and while achieving an improved waterproof effect, increase the bonding strength of concrete. Summary of the Invention

[0009] Aiming at the defects of the prior art, the purpose of the present invention is to provide a permeable crystalline waterproof coating and its use method, improve the waterproof effect of the waterproof coating, enhance the strength and alkali resistance at the same time, and increase the bonding strength of concrete.

[0010] In order to achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0011] On the one hand, the present invention provides a permeable crystalline waterproof coating. Calculated by weight, its raw materials include 50 - 80 parts of portland cement, 40 - 60 parts of modified acrylic polymer emulsion, 10 - 30 parts of quartz sand, 1 - 3 parts of calcium chloride, 1 - 2 parts of sodium carbonate, 2 - 3 parts of sodium silicate, 0.05 - 0.2 part of complexing agent, 0.1 - 0.5 part of methyl cellulose, and 25 - 50 parts of water.

[0012] The present invention selects a modified acrylic polymer emulsion as the raw material of the waterproof coating, which improves the overall waterproof performance, strength and alkali resistance of the waterproof coating.

[0013] In some embodiments, the fineness of the quartz sand is 70 - 150 mesh.

[0014] When the mesh number of quartz sand is high, the specific surface area is large, the water storage capacity is strong, and at the same time, more emulsion and water are needed to fill the voids between the powder materials, resulting in a reduction in free water; at the same time, when the mesh number of quartz sand is low, there is more water, and the adhesion of the coating to the substrate is significantly reduced. The applicant adjusts the fineness of the quartz sand to 70 - 150 mesh, making the coating viscosity moderate and improving the film-forming property and workability.

[0015] In some embodiments, calculated by weight, the waterproof coating further includes 5 - 10 parts of surfactant, and the surfactant is fatty alcohol polyoxyethylene ether.

[0016] By selecting sodium dodecylbenzenesulfonate or fatty alcohol polyoxyethylene ether as the surfactant, the applicant significantly improves the wettability of the waterproof coating system, enabling it to better penetrate into the concrete for crystallization.

[0017] In some embodiments, the preparation method of the modified acrylic polymer emulsion is specifically as follows:

[0018] I. Calculated by weight, add 28 - 40 parts of water and 1 - 5 parts of emulsifier into the reaction kettle, introduce inert gas and stir and heat to 40 - 80 °C;

[0019] II. Add 10 - 14 parts of butyl acrylate and 4 - 8 parts of methyl methacrylate to the reaction kettle, stir and mix, then add 0.5 part of initiator to initiate polymerization, and let it stand for 4 h to form a seed emulsion for standby;

[0020] III. Burn the glass fiber at 240 - 280 °C for 5 - 10 min, put it into vinyltriethoxysilane and soak for 10 - 15 min, and keep shaking. Then place it at room temperature for 1 - 2 h, and then heat it at 100 - 140 °C for 4 - 6 h, and cool to obtain modified glass fiber for standby;

[0021] IV. Add 10 - 14 parts of butyl acrylate, 4 - 8 parts of methyl methacrylate, 3 - 5 parts of vinyltriethoxysilane, and 3 - 5 parts of modified glass fiber to the seed emulsion in step II. After stirring, keep warm for 3 - 5 h, and finally lower the temperature to 35 - 45 °C, and adjust the pH to 8 - 8.5 to obtain a modified acrylic polymer emulsion.

[0022] The applicant modified the acrylic polymer emulsion in the raw materials, which affected the overall performance of the waterproof coating. On the one hand, in this application, the acrylic polymer emulsion was modified by glass fiber, so that after the waterproof coating was cured and crystallized, a fiber structure could be formed, significantly improving the strength and alkali resistance of the waterproof coating, and better filling the interlayer gap of the concrete. The silane group of vinyltriethoxysilane reacted with the silanol group on the surface of the glass fiber to form a covalent bond, thereby surface - modifying the glass fiber. At the same time, the unsaturated double bond in vinyltriethoxysilane could chemically react with the unsaturated double bond in the acrylic polymer emulsion under the action of an initiator, thereby connecting the glass fiber and the acrylic polymer emulsion to generate a modified acrylic polymer emulsion; on the other hand, sodium carbonate in the waterproof coating could react with the glass fiber, promoting the diffusion of sodium ions on the surface of the glass fiber into the fiber interior to form doping, thereby further improving the overall strength and toughness of the waterproof coating.

[0023] In some embodiments, the emulsifier added in step I is sodium dodecylbenzenesulfonate.

[0024] In some embodiments, the mass ratio of the glass fiber to vinyltriethoxysilane added in step III is 1:(5 - 10).

[0025] The applicant controls the reaction rate between the modified glass fiber and the acrylic polymer emulsion by regulating the mass ratio of the glass fiber and vinyltriethoxysilane, so that the content of silanol groups distributed on the surface of the latex particles is moderate, which can not only form a self - crosslinked network with increased density after film - forming to improve water resistance, but also avoid the reduction of the polymerization reaction rate caused by excessive silane coupling agent.

[0026] In some embodiments, by weight, the waterproof coating further comprises 2 - 3 parts of modified potassium methylsilicate.

[0027] By adding modified potassium methyl silicate to the raw materials, the applicant has improved the overall waterproof performance of the waterproof coating. The modified potassium methyl silicate added by the applicant has waterproof performance. At the same time, after hydrolysis, polyacrylamide forms hydrogen bonds with water molecules to construct a network structure, forming a hydrated film, which arranges water molecules in an orderly manner, increases the viscosity, and can form an insoluble network waterproof and breathable film on the surface of the substrate, further improving the waterproof effect of the waterproof coating. At high temperatures, the alkalinity of potassium methyl silicate can cause polyacrylamide to undergo a hydrolysis reaction. After the acylamino group is hydrolyzed, the generated carboxyl group can react with the silanol group on the surface of potassium silicate to achieve the modification of potassium methyl silicate. On the other hand, the unmodified potassium methyl silicate by-products after the reaction can be used as a crystallization agent together with sodium silicate to improve the crystallization performance of the waterproof coating and better fill the concrete cracks.

[0028] In some embodiments, the preparation method of the modified potassium methyl silicate is specifically as follows:

[0029] (1) By weight, add 10 - 30 parts of acrylamide and 150 - 200 parts of water to the reaction kettle, stir and dissolve to obtain an acrylamide solution;

[0030] (2) In a constant temperature water bath, heat a 5 - 15wt% acrylamide solution to 50 - 80 °C, then add 10 - 15 ml of an 8 - 12wt% ammonium persulfate solution to initiate the addition polymerization of acrylamide, stir for 30 - 40 min, stop heating, obtain polyacrylamide, and configure it into a 4 - 8wt% polyacrylamide solution with water;

[0031] (3) Add 15 - 25 parts of a 4 - 8wt% polyacrylamide solution to 15 - 25 parts of a 10 - 15wt% potassium methyl silicate aqueous solution, put it into the reaction kettle, heat it in a water bath to 90 - 100 °C, and stir for 25 - 40 min;

[0032] (4) Adjust the pH to 8 - 9, stir evenly to obtain modified potassium methyl silicate.

[0033] In some embodiments, the mass ratio of the polyacrylamide solution to the potassium methyl silicate aqueous solution is 1:(0.8 - 1.2).

[0034] On the other hand, the present invention also provides a method for using the permeable crystalline waterproof coating described in the above technical solution, including the following steps:

[0035] S1. Add sodium carbonate, sodium silicate and portland cement into water, stir at a speed of 500 - 600 r / min for 15 - 25 min, heat to 60 - 80 °C and keep warm for 1 - 2 h, cool to room temperature, then add modified acrylic polymer emulsion, quartz sand, calcium chloride, complexing agent and methyl cellulose and stir at a speed of 700 - 900 r / min for 5 - 10 min, let stand for 1 - 2 h and then discharge to obtain the permeable crystalline waterproof coating;

[0036] S2. Mix the permeable crystalline waterproof coating and water into a thin slurry according to a mass ratio of 1:0.4 - 0.5;

[0037] S3. Brush or spray the thin slurry obtained in step S2 on the surface of newly poured concrete, and the brushing or spraying amount is 1.5 - 2.0 kg / m 2 , and cure after the coating finally sets.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1. The present invention uses modified acrylic polymer emulsion and modified potassium methyl silicate as raw materials for the waterproof coating. The raw materials are environmentally friendly and will not cause harm to the environment, improving the overall waterproof performance of the waterproof coating. At the same time, the strength and alkali resistance of the waterproof coating are also improved.

[0040] 2. The present invention uses glass fiber to modify the acrylic polymer emulsion, so that after the waterproof coating cures and crystallizes, a fiber structure can be formed, enhancing the interlayer bonding strength of the concrete and improving the overall strength and alkali resistance of the concrete.

[0041] 3. The present invention uses polyacrylamide to modify potassium methyl silicate. At the same time, by regulating the molecular weight of polyacrylamide and increasing the hydrolysis degree of polyacrylamide, an insoluble network waterproof and breathable film can be formed on the surface of the substrate, improving the waterproof performance of the waterproof coating.

[0042] 4. The waterproof coating of the present invention has good wettability and permeability, and can better penetrate into the concrete and generate crystals, avoiding the waterproof coating remaining only on the surface of the concrete. Specific Embodiments

[0043] The following will illustrate the present invention in combination with specific implementation schemes. It should be noted that the following examples are examples of the present invention, only used to illustrate the present invention, and not used to limit the present invention. Without departing from the gist or scope of the present invention, other combinations and various improvements within the concept of the present invention can be made.

[0044] Prepare the permeable crystalline waterproof coating according to the ratio of each component specified in the following examples. The preparation of each component of the permeable crystalline waterproof coating is obtained by mixing according to the methods described in the examples and comparative examples.

[0045] The fatty alcohol polyoxyethylene ether was purchased from Xingtai Xinlanxing Technology Co., Ltd., with the model AEO-3; the acrylic polymer emulsion was purchased from Shanghai Zhenlishi Network Technology Co., Ltd. Without special instructions, other raw materials can be purchased from the market.

[0046] Preparation Example 1

[0047] The preparation method of the modified acrylic polymer emulsion A is as follows:

[0048] I. By weight, add 35 ml of water and 3 g of sodium dodecylbenzenesulfonate to the reaction kettle, introduce nitrogen and stir and heat to 60 °C;

[0049] II. Add 12 g of butyl acrylate and 6 g of methyl methacrylate to the reaction kettle, stir and mix, then add 0.5 g of ammonium persulfate to initiate polymerization, and let it stand for 4 h to form a seed emulsion for standby;

[0050] III. Burn 4 g of glass fiber at 250 °C for 5 min, put it into 32 ml of vinyltriethoxysilane and soak for 10 min, and keep oscillating. Place the glass fiber at room temperature for 1 h, then heat it at 120 °C for 4 h, and cool to obtain modified glass fiber for standby;

[0051] Ⅳ. Add 12 g of butyl acrylate, 6 g of methyl methacrylate, 4 ml of vinyltriethoxysilane, and 4 g of modified glass fiber to the seed emulsion in step II, raise the temperature to 80 °C and stir, keep the temperature for 3 h, and finally lower the temperature to 40 °C, add ammonia water to adjust the pH to 8 to obtain the modified acrylic polymer emulsion A.

[0052] Preparation Example 2

[0053] The preparation method of the modified acrylic polymer emulsion B is the same as that of the modified acrylic polymer emulsion A, except that the mass of sodium dodecylbenzenesulfonate is 0.5 g.

[0054] Preparation Example 3

[0055] The preparation method of the modified potassium methyl silicate is as follows:

[0056] (1) Add 20 g of acrylamide and 180 ml of water to the reaction kettle, stir and dissolve to obtain an acrylamide solution;

[0057] (2) In a 60 °C constant temperature water bath, heat the 10 wt% acrylamide solution to 60 °C, then add 15 ml of 10 wt% ammonium persulfate solution to initiate the addition polymerization of acrylamide. After stirring for half an hour, stop heating to obtain polyacrylamide, and configure it into a 5 wt% polyacrylamide solution with water;

[0058] (3) Add 20 g of a 5 wt% polyacrylamide solution to 20 g of a 10 wt% aqueous potassium methyl silicate solution, place it in a reaction kettle, heat it in a water bath to 95 °C, and stir for 30 min;

[0059] (4) Take the beaker out of the boiling water bath, add sulfuric acid to adjust the pH to 8, stir evenly to obtain modified potassium methyl silicate.

[0060] Example 1

[0061] This example provides a permeable crystalline waterproof coating, which includes raw materials of the following components by weight: 65 parts of portland cement, 50 parts of modified acrylic polymer emulsion A, 2 parts of modified potassium methyl silicate, 20 parts of 110-mesh quartz sand, 8 parts of fatty alcohol polyoxyethylene ether with the model AEO-3, 2 parts of calcium chloride, 2 parts of sodium carbonate, 2 parts of sodium silicate, 0.1 part of EDTA, 0.3 part of methyl cellulose, and 40 parts of water.

[0062] The usage method of the permeable crystalline waterproof coating in this example is as follows:

[0063] S1. Add sodium carbonate, sodium silicate, and portland cement to water, stir at a speed of 550 r / min for 20 min, heat to 70 °C and keep warm for 1.5 h, cool to room temperature, add fatty alcohol polyoxyethylene ether, modified acrylic polymer emulsion A, modified potassium methyl silicate, quartz sand, calcium chloride, EDTA, and methyl cellulose, stir at a speed of 800 r / min for 7 min, let it stand for 1.5 h and then discharge to obtain the permeable crystalline waterproof coating;

[0064] S2. Mix the permeable crystalline waterproof coating with water at a mass ratio of 1:0.45 to form a thin slurry;

[0065] S3. Brush or spray the thin slurry obtained in step I on the surface of newly poured concrete, and the brushing or spraying amount is 1.7 kg / m 2 , and carry out curing after the coating has finally set.

[0066] Example 2

[0067] This example provides a permeable crystalline waterproof coating, which includes raw materials of the following components by weight: 50 parts of portland cement, 40 parts of modified acrylic polymer emulsion A, 2 parts of modified potassium methyl silicate, 10 parts of 70-mesh quartz sand, 5 parts of fatty alcohol polyoxyethylene ether with the model AEO-3, 1 part of calcium chloride, 1 part of sodium carbonate, 2 parts of sodium silicate, 0.05 part of EDTA, 0.1 part of methyl cellulose, and 25 parts of water.

[0068] The usage method of the permeable crystalline waterproof coating in this example is as follows:

[0069] S1. Add sodium carbonate, sodium silicate and portland cement into water, stir at a speed of 500 r / min for 25 min, heat to 60 °C and keep warm for 2 h, cool to room temperature, add fatty alcohol polyoxyethylene ether, modified acrylic polymer emulsion A, modified potassium methyl silicate, quartz sand, calcium chloride, EDTA and methyl cellulose, stir at a speed of 700 r / min for 10 min, let stand for 1 h and then discharge to obtain the permeable crystalline waterproof coating;

[0070] S2. Mix the permeable crystalline waterproof coating and water into a thin slurry according to a mass ratio of 1:0.4;

[0071] S3. Brush or spray the thin slurry obtained in step I on the surface of newly poured concrete, and the brushing or spraying amount is 1.5 kg / m 2 , and carry out curing after the coating finally sets.

[0072] Example 3

[0073] This embodiment provides a permeable crystalline waterproof coating, which includes the following raw materials in parts by weight: 80 parts of portland cement, 60 parts of modified acrylic polymer emulsion A, 3 parts of modified potassium methyl silicate, 30 parts of 150-mesh quartz sand, 8 parts of fatty alcohol polyoxyethylene ether with the model of AEO-3, 3 parts of calcium chloride, 2 parts of sodium carbonate, 3 parts of sodium silicate, 0.2 part of EDTA, 0.5 part of methyl cellulose and 50 parts of water.

[0074] The using method of the permeable crystalline waterproof coating in this embodiment is as follows:

[0075] S1. Add sodium carbonate, sodium silicate and portland cement into water, stir at a speed of 600 r / min for 15 min, heat to 80 °C and keep warm for 1 h, cool to room temperature, add fatty alcohol polyoxyethylene ether, modified acrylic polymer emulsion A, modified potassium methyl silicate, quartz sand, calcium chloride, EDTA and methyl cellulose, stir at a speed of 900 r / min for 5 min, let stand for 2 h and then discharge to obtain the permeable crystalline waterproof coating;

[0076] S2. Mix the permeable crystalline waterproof coating and water into a thin slurry according to a mass ratio of 1:0.5;

[0077] S3. Brush or spray the thin slurry obtained in step I on the surface of newly poured concrete, and the brushing or spraying amount is 2.0 kg / m 2 , and carry out curing after the coating finally sets.

[0078] Example 4

[0079] A permeable crystalline waterproof coating and its usage method. The specific implementation is the same as that of Example 1, except that the modified acrylic polymer emulsion A is replaced by an equal amount of modified acrylic polymer emulsion B.

[0080] Example 5

[0081] A permeable crystalline waterproof coating and its usage method. The specific implementation is the same as that of Example 1, except that the modified potassium methyl silicate is replaced by an equal amount of commercially available potassium methyl silicate.

[0082] Example 6

[0083] A permeable crystalline waterproof coating and its usage method. The specific implementation is the same as that of Example 1, except that it does not include modified potassium methyl silicate.

[0084] Comparative Example 1

[0085] A permeable crystalline waterproof coating and its usage method. The specific implementation is the same as that of Example 1, except that the modified acrylic polymer emulsion A is replaced by an equal amount of commercially available acrylic polymer emulsion.

[0086] Performance testing:

[0087] (1) Concrete strength

[0088] According to JC / T474 - 2008 "Waterproofing Agents for Mortars and Concrete", the 28-day compressive strength ratio (%) of the concrete structures obtained from Examples 1 - 6 and Comparative Examples 1 - 2 was tested.

[0089] (2) Permeability

[0090] According to GB18455 - 2012 "Cementitious Penetrating Crystalline Waterproof Materials", the 28-day concrete water penetration resistance test was carried out on the concrete structures obtained from Examples 1 - 6 and Comparative Examples 1 - 2.

[0091] (3) Emulsion polymerization stability

[0092] Observe whether there is blue light in the modified acrylic polymer emulsion. The blue light presented by the emulsion is formed by the light scattering of latex particles. The smaller the particle size, the stronger the blue light and the better the stability.

[0093] Table 1

[0094] Compressive Strength Ratio (%) Impermeability Pressure (MPa) Emulsion Appearance Example 1 122 3.2 Adequate blue light Example 2 120 2.9 Adequate blue light Example 3 121 3.1 Adequate blue light Example 4 115 2.8 Milky white, no blue light Example 5 121 2.3 Adequate blue light Example 6 114 1.9 Milky white, no blue light Comparative Example 1 108 2.8 Adequate blue light

[0095] As can be seen from Table 1, in the present invention, the permeable crystalline waterproof coatings of Examples 1-3 have the best effects. In the raw materials, the acrylic polymer emulsion has sufficient blue light in appearance, small particle size, and strong stability. At the same time, the waterproof coating has high compressive strength and impermeability pressure, and excellent waterproof and impermeability performance and mechanical properties.

[0096] Compared with Examples 1-3, in the raw materials of Example 4, since more emulsifier was added during the preparation of the modified acrylic polymer emulsion, almost no blue light can be observed in the appearance of the emulsion. The blue light presented by the emulsion is formed by the scattering of light by latex particles. The larger the particle size, the weaker the blue light. At the same time, the gel rate is also relatively high, and the overall emulsion is not stable enough, and flocculation may occur, and the improvement of concrete strength is not stable enough.

[0097] In Example 5, commercially available potassium methyl silicate was selected, and in Example 6, potassium methyl silicate was not added, which had a certain degree of negative impact on the waterproof performance of the waterproof coating, but had almost no impact on other properties.

[0098] In Comparative Example 1, instead of using the modified acrylic polymer emulsion, commercially available acrylic polymer was selected, which had a relatively obvious negative impact on the concrete strength.

[0099] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to be equivalent embodiments within the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A permeable crystalline waterproof coating, characterized in that, By weight, its raw materials include 50 - 80 parts of portland cement, 40 - 60 parts of modified acrylic polymer emulsion, 10 - 30 parts of quartz sand, 1 - 3 parts of calcium chloride, 1 - 2 parts of sodium carbonate, 2 - 3 parts of sodium silicate, 0.05 - 0.2 part of complexing agent, 0.1 - 0.5 part of methyl cellulose, and 25 - 50 parts of water; The preparation method of the modified acrylic polymer emulsion is specifically as follows: I. By weight, add 28 - 40 parts of water and 1 - 5 parts of emulsifier into the reaction kettle, introduce inert gas and stir and heat to 40 - 80 °C; II. Add 10 - 14 parts of butyl acrylate and 4 - 8 parts of methyl methacrylate into the reaction kettle, stir and mix, then add 0.5 part of initiator to initiate polymerization, and let it stand for 4 h to form a seed emulsion for standby; III. Burn the glass fiber at 240 - 280 °C for 5 - 10 min, soak it in vinyltriethoxysilane for 10 - 15 min, and keep oscillating, then place it at room temperature for 1 - 2 h, and then heat it at 100 - 140 °C for 4 - 6 h, and cool to obtain modified glass fiber for standby; Ⅳ. Add 10 - 14 parts of butyl acrylate, 4 - 8 parts of methyl methacrylate, 3 - 5 parts of vinyltriethoxysilane, and 3 - 5 parts of modified glass fiber to the seed emulsion in step II, stir and then keep warm for 3 - 5 h, and finally lower the temperature to 35 - 45 °C, and adjust the pH to 8 - 8.5 to obtain the modified acrylic polymer emulsion; In the step III, the mass ratio of the added glass fiber to vinyltriethoxysilane is 1:(5 - 10); By weight, the waterproof coating further includes 2 - 3 parts of modified potassium methylsilicate; The preparation method of the modified potassium methylsilicate is specifically as follows: (1) By weight, add 10 - 30 parts of acrylamide and 150 - 200 parts of water into the reaction kettle, stir and dissolve to obtain an acrylamide solution; (2) In a constant temperature water bath, heat the 5 - 15 wt% acrylamide solution to 50 - 80 °C, then add 10 - 15 ml of 8 - 12 wt% ammonium persulfate solution to initiate the addition polymerization of acrylamide, stir for 30 - 40 min, stop heating, obtain polyacrylamide, and configure it into a 4 - 8 wt% polyacrylamide solution with water; (3) Add 15 - 25 parts of 4 - 8 wt% polyacrylamide solution to 15 - 25 parts of 10 - 15 wt% potassium methylsilicate aqueous solution, put it into the reaction kettle, heat it in a water bath to 90 - 100 °C, and stir for 25 - 40 min; (4) Adjust the pH to 8 - 9, stir evenly to obtain modified potassium methylsilicate; In step (3), the mass ratio of the polyacrylamide solution to the potassium methylsilicate aqueous solution is 1:(0.8 - 1.2).

2. The penetrating crystalline waterproof coating according to claim 1, characterized in that, The fineness of the quartz sand is 70 - 150 mesh.

3. An osmotic crystalline waterproof coating according to claim 1, characterized in that, By weight, the waterproof coating further includes 5 - 10 parts of surfactant, and the surfactant is fatty alcohol polyoxyethylene ether.

4. A method for using a penetrating crystalline waterproof coating according to any one of claims 1-3, characterized in that, It includes the following steps: S1. Add sodium carbonate, sodium silicate and portland cement into water, stir at a speed of 500 - 600 r / min for 15 - 25 min, heat to 60 - 80 °C and keep warm for 1 - 2 h, cool to room temperature, add modified acrylic polymer emulsion, modified potassium methyl silicate, quartz sand, calcium chloride, complexing agent and methyl cellulose, stir at a speed of 700 - 900 r / min for 5 - 10 min, stand for 1 - 2 h and then discharge to obtain the permeable crystalline waterproof coating; S2. Mix the permeable crystalline waterproof coating and water into a thin slurry according to a mass ratio of 1:0.4 - 0.5; S3. Apply the slurry obtained in step S2 by brushing or spraying on the surface of newly poured concrete, with the brushing or spraying amount being 1.5 - 2.0 kg / m 2 , and conduct curing after the coating reaches final setting.