Composition for capillary crystalline waterproof coating, capillary crystalline waterproof coating as well as preparation method and application of capillary crystalline waterproof coating

Abstract

The invention relates to the field of building waterproofing, and discloses a composition for a capillary crystalline waterproof coating, the capillary crystalline waterproof coating as well as a preparation method and application of the capillary crystalline waterproof coating. The composition contains a main agent and an auxiliary agent, the main agent comprises cement, bioactive microspheres, a high-molecular water-absorbing polymer, a filler and latex powder; the cement is a combination of aluminate cement and Portland cement in a content mass ratio of 1: (11-55); the bioactive microspheres are prepared by a method comprising the following steps: mixing a mixed bacteria solution containing bacillus pasteurii and candida utilis with sodium alginate and calcium acetate to obtain the bioactive microspheres. The capillary crystalline waterproof coating provided by the invention has excellent anti-permeability, bonding performance, repairing performance and durability.

Description

Technical Field

[0001] The present invention relates to the field of building waterproofing, and in particular to a composition for a penetrating crystalline waterproof coating, a penetrating crystalline waterproof coating, and a preparation method and application thereof. Background Art

[0002] In the construction industry, waterproofing is crucial to structural safety and longevity. Early rigid waterproofing relied on the density of concrete. However, as construction scale expanded and waterproofing requirements increased, concrete's flaws became apparent. Concrete's numerous internal pores and capillaries make it susceptible to cracking due to temperature, sedimentation, and stress, creating a favorable environment for water penetration.

[0003] Traditional waterproofing methods using membranes and coatings were once the mainstays. Membrane materials rely on paving to create a physical barrier, while coatings leverage the density of their coatings for waterproofing. However, membrane construction places high demands on the base layer, resulting in leaky joints and rapid aging and deformation, significantly compromising waterproofing performance. Coatings are significantly affected by temperature and humidity, resulting in uneven coatings and poor durability. Frequent repairs are costly and difficult to address, making the waterproofing problem a fundamental issue. This is when penetrating crystallizing waterproof coatings emerged. Existing cement-based penetrating crystallizing waterproof coatings primarily utilize penetrating crystallizing masterbatches such as calcium sulfate, calcium chloride, sodium silicate, aluminum silicate, citric acid and its metal salts, and stearates. These active masterbatches are relatively limited in type, and their penetrating, crystallizing, and waterproofing properties require further improvement.

[0004] For example, CN110835257A discloses a method for preparing a cement-based penetrating crystallization waterproof coating, which primarily comprises the following components by weight: 70% Portland cement, 20.5% quartz sand, 2% sodium silicate, 2% water-soluble fiber, 1.5% citric acid, and 4% calcium carbonate. This penetrating crystallization waterproof coating relies solely on sodium silicate as the active ingredient, potentially limiting its ability to stimulate penetrating crystallization in the cement-based material. Furthermore, the coating contains very little organic bonding material, resulting in weak adhesion and easy coating shedding in actual use, impacting both waterproofing effectiveness and material durability.

[0005] CN108751843A discloses a back-water pressure waterproof coating for plugging leaks and preventing seepage on the back water surface, characterized in that it includes the following substances by weight: 400-500 parts of silicate cement; 350-480 parts of sand filler; 20-50 parts of latex powder; 5-10 parts of waterproofing agent; 10-50 parts of coagulant; 20-50 parts of active masterbatch; 2-10 parts of thixotropic agent; 2-5 parts of fiber; 0-2 parts of cellulose ether; 1-3 parts of defoaming agent; and 1-10 parts of pigment. This solution does not use biologically active ingredients, making it difficult to achieve long-term automatic repair of fine cracks. Under high water pressure and complex environments, the anti-seepage pressure ratio and the secondary anti-seepage pressure ratio may be poor. In terms of component synergy, there is no synergistic effect between its components, the overall performance improvement is limited, and the effect of improving the durability of concrete structures is not obvious. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems of impermeability, adhesion, repairability and durability of the penetrating crystallization type waterproof coating in the prior art.

[0007] In order to achieve the above-mentioned object, the first aspect of the present invention provides a composition for a penetrating crystallization waterproof coating, which contains a main agent and an auxiliary agent; the main agent includes cement, bioactive microspheres, a high molecular weight water-absorbing polymer, a filler, and latex powder; Based on the total mass of the composition, the content of the cement is 36-58wt%, the content of the bioactive microspheres is 0.5-5wt%, the content of the high molecular weight water-absorbing polymer is 0.01-0.05wt%, the content of the filler is 37-59wt%, the content of the latex powder is 2-6wt%, and the content of the additive is 0.45-1.2wt%. The cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:11-55; The bioactive microspheres are prepared by a method comprising the following steps: mixing a mixed bacterial liquid containing Bacillus pasteurianus and Candida utilis with sodium alginate and calcium acetate to obtain the bioactive microspheres.

[0008] The second aspect of the present invention provides a method for preparing a penetrating crystalline waterproof coating, which is carried out using the composition described in the first aspect, comprising: mixing and reacting a mixture of the components of the composition for penetrating crystalline waterproof coating to obtain the penetrating crystalline waterproof coating.

[0009] The third aspect of the present invention provides a penetrating crystalline waterproof coating prepared by the method described in the second aspect.

[0010] The fourth aspect of the present invention provides the use of the penetrating crystalline waterproof coating described in the third aspect in the field of building waterproofing.

[0011] The present invention achieves functional complementarity and enhancement by compounding bioactive microspheres of mixed bacterial strains with high molecular weight water-absorbing polymers, scientifically matching specific composite cement, fillers, and latex powder, and precisely controlling the content of each component. The resulting waterproof coating has at least the following beneficial effects compared to the prior art: 1. The waterproof coating provided by the present invention can improve the repair effect through the dual paths of physical filling and chemical strengthening, and the anti-seepage performance is significantly improved; 2. The microorganisms in the waterproof coating provided by the present invention can remain active in the coating for more than 5 years, which is significantly better than the 1-2 year activity period in the prior art, and can ensure the long-term stable operation of the waterproof coating; 3. The waterproof coating provided by this invention implements a "dormancy-activation" intelligent response system. When dry, the water-absorbing polymer shrinks, causing microorganisms to hibernate and reducing nutrient consumption. When water seeps through cracks, the polymer rapidly absorbs water and expands, creating a moist microenvironment that activates the microorganisms within the microspheres and precisely initiates repair. This mechanism can shorten the repair response time to within 24 hours, and unrepaired microspheres can be reactivated, achieving a cyclical "repair upon damage, dormancy without damage" approach. 4. The waterproof coating provided by the present invention has a stronger bonding effect with the base material, which can effectively solve the problem that traditional waterproof materials are easy to fall off and have poor stability when applied on the back water surface; DETAILED DESCRIPTION The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0012] As mentioned above, the first aspect of the present invention provides a composition for a penetrating crystallization waterproof coating, which contains a main agent and an auxiliary agent; the main agent includes cement, bioactive microspheres, a high molecular weight water-absorbing polymer, a filler, and latex powder; Based on the total mass of the composition, the content of the cement is 36-58wt%, the content of the bioactive microspheres is 0.5-5wt%, the content of the high molecular weight water-absorbing polymer is 0.01-0.05wt%, the content of the filler is 37-59wt%, the content of the latex powder is 2-6wt%, and the content of the additive is 0.45-1.2wt%. The cement is aluminate cement and silicate cement in a mass ratio of 1:11-55; The bioactive microspheres are prepared by a method comprising the following steps: mixing a mixed bacterial liquid containing Bacillus pasteurianus and Candida utilis with sodium alginate and calcium acetate to obtain the bioactive microspheres.

[0013] Preferably, based on the total mass of the composition, the cement content is 45-52wt%, the bioactive microspheres content is 1-3wt%, the high molecular weight water-absorbing polymer content is 0.01-0.02wt%, the filler content is 40-55wt%, the latex powder content is 3-5wt%, and the additive content is 0.45-1.2wt%. The inventors have discovered that by precisely controlling the content of each component within this preferred range, the components can be better synergistically exerted, resulting in a waterproof coating with better overall performance in terms of impermeability, adhesion, and repair.

[0014] Preferably, the cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:22-50. The inventors have discovered that this preferred embodiment can achieve a certain strength in a shorter period of time, and its hydration products can better fill the pores and capillary channels in the cement paste, making the structure denser, and more effectively reducing the material's permeability and preventing water intrusion.

[0015] In order to help obtain higher bonding strength and cohesion, so that the obtained waterproof coating has better impermeability and deformation resistance, preferably, the latex powder is selected from at least one of VAE latex powder, styrene acrylic latex powder and vinacetic acid latex powder.

[0016] Preferably, the high molecular weight water-absorbing polymer is selected from at least one of cross-linked polyacrylamide, sodium polyacrylate, and chitosan derivatives.

[0017] More preferably, the high molecular weight water-absorbing polymer is a combination of cross-linked polyacrylamide and a chitosan derivative in a mass ratio of 1:2-5. The inventors have discovered that this preferred embodiment fully utilizes the synergistic water absorption and water retention properties of the two polymers, resulting in a waterproof coating with improved bonding strength and impermeability in humid environments, as well as a more durable self-healing ability.

[0018] More preferably, the cross-linked polyacrylamide has a number average molecular weight of 100,000-500,000 and an average particle diameter of 45-150 μm.

[0019] More preferably, the chitosan derivative has a molecular weight of 10,000-50,000 and a water absorption rate of 50-150 g / g. The inventors have found that a chitosan derivative with too low a water absorption rate will not be able to quickly seal microcracks and retain moisture, while a high water absorption rate will cause excessive swelling of the material, resulting in a loose structure and reduced adhesion. Therefore, within this preferred range, the waterproof coating can meet the balance between water absorption and repair and structural stability.

[0020] Preferably, the filler is selected from at least one of sand, silica fume and heavy calcium carbonate.

[0021] More preferably, the filler is a combination of silica fume, heavy calcium carbonate, and sand and gravel in a mass ratio of 1:1.25-5:7.5-22.5. The inventors have discovered that this preferred embodiment not only provides skeletal support to enhance structure and strength, but also regulates the chemical reaction process and microstructure within the material, thereby improving the durability and functionality of the waterproof coating.

[0022] In order to better adjust the pore size and distribution inside the material and improve the material density and impermeability, it is further preferred that the average particle diameter of the sand and gravel is 0.1-0.15mm; the bulk density of the silica fume is less than 300g / L; and the average particle diameter of the heavy calcium is 0.07-0.08mm.

[0023] Preferably, in the method for preparing bioactive microspheres, the mixing step further comprises: SI-1, contacting a mixed bacterial liquid containing Bacillus pasteurianus and Candida utilis with a 3-5 wt% aqueous sodium alginate solution to obtain a first material; SI-2. The first material is added dropwise to a calcium acetate aqueous solution having a concentration of 0.3-0.6 mol / L for a second contact to obtain the bioactive microspheres; the addition rate is 1-5 mL / min.

[0024] Preferably, the conditions for the first contact include: temperature of 25-30° C., stirring speed of 100-150 rpm, and time of 0.5-2 h.

[0025] Preferably, the conditions for the second contact include: temperature of 25-30° C., stirring speed of 300-400 rpm, and time of 2-3 h.

[0026] Preferably, the average particle diameter of the bioactive microspheres is 500-800 μm.

[0027] It should be noted that in the present invention, in the method for preparing bioactive microspheres, the method also includes a conventional post-processing step. For example, bioactive microspheres with a water content of no more than 30 wt % can be obtained by air drying for preparing waterproof coatings.

[0028] Preferably, in the step of preparing the bioactive microspheres, the total concentration of the mixed bacterial solution is 10 7 -10 8 CFU / mL, the CFU concentration ratio of the Bacillus pasteurianus to the Candida utilis is 1:0.4-0.6.

[0029] Preferably, in step SI-1, the volume ratio of the mixed bacterial solution to the 3-5 wt % sodium alginate aqueous solution is 1:3-8.

[0030] Preferably, in step SI-2, the volume ratio of the first material to the calcium acetate aqueous solution with a concentration of 0.3-0.6 mol / L is 1:5-15.

[0031] It should be noted that the concentration of the mixed bacterial liquid can be adjusted by a nutrient solution. The formula of the nutrient solution is a conventional choice in the art. For example, the nutrient solution may contain 0.5-2 wt % sodium gluconate, 0.2-0.5 wt % potassium dihydrogen phosphate, and 0.3-0.8 wt % yeast powder. The present invention will not be described in detail here, and those skilled in the art should not be understood as limiting the present invention.

[0032] Preferably, the auxiliary agent contains a defoamer, a water reducing agent, a water retaining agent and a water repellent.

[0033] More preferably, based on the total mass of the composition, the content of the defoaming agent is 0.1-0.3 wt %, the content of the water reducing agent is 0.05-0.15 wt %, the content of the water retaining agent is 0.1-0.2 wt %, and the content of the water repellent is 0.2-0.4 wt %.

[0034] Further preferably, the defoaming agent is selected from at least one of a polyether defoaming agent and a silicone defoaming agent; the water reducer is selected from at least one of a melamine water reducer and a polycarboxylic acid water reducer; the water retaining agent is selected from at least one of hydroxyethyl methylcellulose and hydroxypropyl methylcellulose; and the hydrophobic agent is selected from at least one of an organosilane water repellent and a modified calcium silicate water repellent.

[0035] As mentioned above, the second aspect of the present invention provides a method for preparing a penetrating crystallization type waterproof coating, which is carried out using the composition described in the first aspect, and includes: mixing and reacting a mixture of the components of the composition for penetrating crystallization type waterproof coating to obtain the penetrating crystallization type waterproof coating.

[0036] Preferably, the operation of performing the mixing reaction comprises: (1) performing a first mixing of a mixture of the components of the composition for a penetrating crystallization type waterproof coating to obtain an intermediate material; (2) The intermediate material is mixed with water at a mass ratio of 1:0.28-0.32 to obtain the penetrating crystalline waterproof coating.

[0037] More preferably, the first mixing conditions include: temperature of 5-35°C, time of 10-20 min, and stirring speed of 150-300 rpm; the second mixing conditions include: temperature of 5-35°C, time of 5-10 min, and stirring speed of 400-800 rpm.

[0038] As mentioned above, the third aspect of the present invention provides a penetrating crystallization waterproof coating prepared by the method described in the second aspect.

[0039] As mentioned above, the fourth aspect of the present invention provides the application of the penetrating crystalline waterproof coating described in the third aspect in the field of building waterproofing.

[0040] The present invention will be described in detail below through examples.

[0041] In the following examples, unless otherwise specified, all reagents and raw materials involved are commercially available, and all reagents are analytically pure products.

[0042] raw material: Bacillus pasteurianus: purchased from Shanghai Huzheng Biotechnology Co., Ltd. Candida utilis: purchased from Shanghai Huzheng Biotechnology Co., Ltd. Cross-linked polyacrylamide: number average molecular weight 300,000, average particle diameter 97 μm, model Bio-GelP, purchased from Tosoh Corporation, Japan; Chitosan derivative: number average molecular weight 30,000, water absorption rate 100 g / g, model 5623, purchased from Shaanxi Xinyao Biotechnology Co., Ltd. Sodium polyacrylate: model CS00263, purchased from Hubei Changxinsheng Chemical Co., Ltd. Sand and gravel: The average particle diameter is 0.25 mm, purchased from Anhui Yuancheng Silica Sand Technology Co., Ltd. Silica fume: bulk density 175 g / L, purchased from Quanzhou Weilinte Industrial Co., Ltd. Heavy calcium: the average particle diameter is 0.074 mm, purchased from Changxing Huayuan Powder Material Co., Ltd. Latex powder: 5515H, purchased from Wacker Chemie AG, Germany; Defoaming agent: D130, purchased from Jiangsu Zhaojia Building Materials Technology Co., Ltd.; Water reducing agent: 325C, purchased from Sika Company, Switzerland; Water-retaining agent: CMC1218, purchased from Shandong Heda Group Co., Ltd. Water repellent: WR650, purchased from Guangzhou Jiantubao Company.

[0043] Preparation Example 1 This preparation example is used to illustrate that the bioactive microspheres provided by the present invention are prepared using the following method: The total concentration of the mixed bacterial solution was 10 7 CFU / mL; the CFU concentration ratio of Bacillus pasteurianus to the Candida utilis is 1:0.4; SI-1. A mixed bacterial liquid containing Bacillus pasteurianus and Candida utilis is first contacted with a 3 wt % aqueous sodium alginate solution to obtain a first material; the first contact conditions include: a temperature of 25° C., a stirring speed of 100 rpm, and a time of 2 hours; and the volume ratio of the mixed bacterial liquid to the 3 wt % aqueous sodium alginate solution is 1:8; SI-2. The first material is added dropwise to a 0.3 mol / L calcium acetate aqueous solution for a second contact, and then air-dried to obtain the bioactive microspheres Z1; the addition rate is 2 mL / min; the conditions for the second contact include: a temperature of 25° C., a stirring speed of 300 rpm, and a time of 2 h; the volume ratio of the first material to the 0.3 mol / L calcium acetate aqueous solution is 1:15.

[0044] Preparation Example 2 This preparation example is used to illustrate that the bioactive microspheres provided by the present invention are prepared using the following method: The total concentration of the mixed bacterial solution was 10 8 CFU / mL; the CFU concentration ratio of Bacillus pasteurianus to the Candida utilis is 1:0.6; SI-1. A mixed bacterial liquid containing Bacillus pasteurianus and Candida utilis is first contacted with a 5 wt% aqueous sodium alginate solution to obtain a first material; the first contacting conditions include: a temperature of 25° C., a stirring speed of 150 rpm, and a time of 1 hour; and a volume ratio of the mixed bacterial liquid to the 5 wt% aqueous sodium alginate solution of 1:3; SI-2. The first material is added dropwise to a 0.6 mol / L calcium acetate aqueous solution for a second contact, and then air-dried to obtain the bioactive microspheres Z2; the addition rate is 3 mL / min; the conditions for the second contact include: a temperature of 25° C., a stirring speed of 400 rpm, and a time of 3 h; the volume ratio of the first material to the 0.6 mol / L calcium acetate aqueous solution is 1:5.

[0045] Preparation Example 3 This preparation example was carried out using a process similar to that of Preparation Example 1, except that in this preparation example, the total concentration of the mixed bacterial solution was controlled to be the same as that of Preparation Example 1; and the CFU concentration ratio of Bacillus pasteurianus to the Candida utilis was 1:1.

[0046] The rest are the same as in Preparation Example 1.

[0047] Bioactive microspheres Z3 were prepared.

[0048] Preparation Example 4 This preparation example was carried out using a similar process to that of Preparation Example 1, except that in this preparation example, the total concentration of the mixed bacterial solution was 10 9 CFU / mL; the CFU concentration ratio of Bacillus pasteurianus to the Candida utilis is 1:0.4; The rest are the same as in Preparation Example 1.

[0049] Bioactive microspheres Z4 were prepared.

[0050] Preparation Example D1 This preparation example was carried out using a process similar to that of Preparation Example 1, except that in this preparation example, the total concentration of the control bacteria solution was the same as that of Preparation Example 1; however, the bacteria solution contained only Bacillus pasteurianus and did not contain Candida utilis.

[0051] The rest are the same as in Preparation Example 1.

[0052] Bioactive microspheres DZ1 were prepared.

[0053] Preparation Example D2 This preparation example was carried out using a process similar to that of Preparation Example 1, except that in this preparation example, the total concentration of the bacterial solution was controlled to be the same as that of Preparation Example 1; however, the bacterial solution contained only Candida utilis and did not contain Bacillus pasteurianus.

[0054] The rest are the same as in Preparation Example 1.

[0055] Bioactive microspheres DZ2 were prepared.

[0056] Preparation Example D3 (1) Preparation of bioactive microspheres of Bacillus pasteurianus The total concentration of Bacillus pasteurianus was 10 7 CFU / mL; SI-1, contacting a Bacillus pasteurianus bacterial liquid with a 3 wt % sodium alginate aqueous solution to obtain a first material; SI-2, adding the first material dropwise to a 0.3 mol / L calcium acetate aqueous solution for a second contact, followed by air drying to obtain Bacillus pasteurianus bioactive microspheres; (2) Preparation of bioactive microspheres of Candida utilis The concentration of Candida utilis was 10 7 CFU / mL; SI-1, contacting a Candida utilis bacterial liquid with a 3 wt % sodium alginate aqueous solution to obtain a first material; SI-2, adding the first material dropwise to a 0.3 mol / L calcium acetate aqueous solution for a second contact, and then air-drying to obtain Candida utilis bioactive microspheres; (3) The above-mentioned Bacillus pasteurianus bioactive microspheres and Candida utilis bioactive microspheres were mixed at a CFU concentration ratio of Bacillus pasteurianus to Candida utilis of 1:0.4 to obtain mixed bioactive microspheres DZ3.

[0057] Example 1 (1) performing a first mixing of a mixture of the components of the composition for a penetrating crystallization type waterproof coating to obtain an intermediate material; the first mixing conditions include: a temperature of 25° C., a time of 10 minutes, and a stirring speed of 150 rpm; (2) The intermediate material and water are mixed for a second time at a mass ratio of 1:0.28 to obtain the penetrating crystalline waterproof coating S1; the conditions for the second mixing include: temperature of 25°C, time of 10 minutes, and stirring speed of 500 rpm; In this embodiment, the formulation of the penetrating crystallization waterproof coating composition is as follows: Based on the total amount of the composition, the amount of the cement is 47wt%, the amount of the bioactive microspheres is 2wt%, the amount of the high molecular weight water-absorbing polymer is 0.01wt%, the amount of the filler is 46.27wt%, the amount of the latex powder is 4wt%, the amount of the defoaming agent is 0.2wt%, the amount of the water reducing agent is 0.12wt%, the amount of the water retaining agent is 0.1wt%, and the amount of the water repellent is 0.3wt%. The cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:22.5; The high molecular weight water-absorbing polymer is a combination of cross-linked polyacrylamide and chitosan derivatives in a mass ratio of 1:2; The filler is a combination of silica fume, heavy calcium carbonate and sand and gravel in a mass ratio of 1:2.3:12.09; The bioactive microspheres are the bioactive microspheres Z1 obtained in Preparation Example 1.

[0058] Example 2 (1) performing a first mixing of a mixture of the components of the composition for a penetrating crystallization type waterproof coating to obtain an intermediate material; the first mixing conditions include: a temperature of 25° C., a time of 10 minutes, and a stirring speed of 150 rpm; (2) The intermediate material and water are mixed for a second time at a mass ratio of 1:0.32 to obtain the penetrating crystalline waterproof coating S2; the conditions for the second mixing include: temperature of 25°C, time of 10 minutes, and stirring speed of 500 rpm; In this embodiment, the formulation of the penetrating crystallization waterproof coating composition is as follows: Based on the total amount of the composition, the amount of the cement is 51wt%, the amount of the bioactive microspheres is 2.5wt%, the amount of the high molecular weight water-absorbing polymer is 0.015wt%, the amount of the filler is 42.735wt%, the amount of the latex powder is 3wt%, the amount of the defoaming agent is 0.2wt%, the amount of the water reducing agent is 0.15wt%, the amount of the water retaining agent is 0.1wt%, and the amount of the water repellent is 0.3wt%. The cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:50; The high molecular weight water-absorbing polymer is a combination of cross-linked polyacrylamide and chitosan derivatives in a mass ratio of 1:5; The filler is a combination of silica fume, heavy calcium carbonate and sand and gravel in a mass ratio of 1:1.25:8.43; The bioactive microspheres are the bioactive microspheres Z2 obtained in Preparation Example 2.

[0059] Example 3 This embodiment is carried out using a process similar to that of Example 1, except that, in this embodiment, the formulation of the composition for the penetrating crystallization type waterproof coating is as follows: Based on the total amount of the composition, the amount of the cement is 47wt%, the amount of the bioactive microspheres is 5wt%, the amount of the high molecular water-absorbing polymer is 0.01wt%, the amount of the filler is 43.27wt%, the amount of the latex powder is 4wt%, the amount of the defoaming agent is 0.2wt%, the amount of the water reducing agent is 0.12wt%, the amount of the water retaining agent is 0.1wt%, and the amount of the water repellent is 0.3wt%.

[0060] The rest are the same as in Example 1.

[0061] A penetrating crystalline waterproof coating S3 was prepared.

[0062] Example 4 This embodiment is carried out using a process similar to that of Example 1, except that, in this embodiment, the total amount of cement is controlled to be the same as that of Example 1, but the cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:11.

[0063] The rest are the same as in Example 1.

[0064] A penetrating crystalline waterproof coating S4 was prepared.

[0065] Example 5 This example is carried out using a process similar to that of Example 1, except that, in this example, the total amount of the high molecular weight water-absorbing polymer is controlled to be the same as that of Example 1, but the high molecular weight water-absorbing polymer is a combination of cross-linked polyacrylamide and sodium polyacrylate in a mass ratio of 1:2.

[0066] The rest are the same as in Example 1.

[0067] A penetrating crystalline waterproof coating S5 was prepared.

[0068] Example 6 This embodiment is carried out using a process similar to that of Example 1, except that, in this embodiment, the total amount of the control filler is the same as that of Example 1, but the filler is a combination of silica fume, heavy calcium carbonate and sand and gravel in a mass ratio of 1:1:1.

[0069] The rest are the same as in Example 1.

[0070] A penetrating crystalline waterproof coating S6 was prepared.

[0071] Example 7 This example is carried out using a process similar to that of Example 1, except that, in this example, the total amount of the high molecular weight water-absorbing polymer is controlled to be the same as that of Example 1, but the high molecular weight water-absorbing polymer is cross-linked polyacrylamide.

[0072] The rest are the same as in Example 1.

[0073] A penetrating crystalline waterproof coating S7 was prepared.

[0074] Example 8 This example was carried out using a process similar to that of Example 1, except that, in this example, bioactive microspheres Z3 obtained in Preparation Example 3 of equal quality were used to replace Z1 in Example 1.

[0075] The rest are the same as in Example 1.

[0076] A penetrating crystalline waterproof coating S8 was prepared.

[0077] Example 9 This example was carried out using a process similar to that of Example 1, except that in this example, bioactive microspheres Z4 obtained in Preparation Example 4 of equal quality were used to replace Z1 in Example 1.

[0078] The rest are the same as in Example 1.

[0079] A penetrating crystalline waterproof coating S9 was prepared.

[0080] Comparative Example 1 This comparative example 1 was carried out using a process similar to that of Example 1, except that in this comparative example, the bioactive microspheres DZ1 obtained in Preparation Example D1 of equal mass were used to replace Z1 in Example 1.

[0081] The rest are the same as in Example 1.

[0082] A penetrating crystalline waterproof coating DS1 was prepared.

[0083] Comparative Example 2 Comparative Example 2 was carried out using a process similar to that of Example 1, except that, in this comparative example, bioactive microspheres DZ2 obtained in Preparation Example D2 of equal mass were used to replace Z1 in Example 1.

[0084] The rest are the same as in Example 1.

[0085] A penetrating crystalline waterproof coating DS2 was prepared.

[0086] Comparative Example 3 Comparative Example 3 was carried out using a process similar to that of Example 1, except that, in this comparative example, bioactive microspheres DZ3 obtained in Preparation Example D3 of equal mass were used to replace Z1 in Example 1.

[0087] The rest are the same as in Example 1.

[0088] The penetrating crystalline waterproof coating DS3 was prepared.

[0089] Comparative Example 4 Comparative Example 4 was carried out using a process similar to that of Example 1, except that no polymer water-absorbing material was used in this comparative example. The formulation of the penetrating crystallization waterproof coating composition was as follows: Based on the total amount of the composition, the amount of the cement is 47wt%, the amount of the bioactive microspheres is 2wt%, the amount of the filler is 46.28wt%, the amount of the latex powder is 4wt%, the amount of the defoamer is 0.2wt%, the amount of the water reducer is 0.12wt%, the amount of the water retaining agent is 0.1wt%, and the amount of the water repellent is 0.3wt%.

[0090] The rest are the same as in Example 1.

[0091] The penetrating crystalline waterproof coating DS4 was prepared.

[0092] Comparative Example 5 Comparative Example 5 was carried out using a process similar to that of Example 1, except that no bioactive microspheres were used in this comparative example. The formulation of the penetrating crystalline waterproof coating composition was as follows: Based on the total amount of the composition, the amount of the cement is 47wt%, the amount of the high molecular weight water-absorbing polymer is 0.01wt%, the amount of the filler is 48.27wt%, the amount of the latex powder is 4wt%, the amount of the defoamer is 0.2wt%, the amount of the water-reducing agent is 0.12wt%, the amount of the water-retaining agent is 0.1wt%, and the amount of the water-repellent is 0.3wt%. The rest are the same as in Example 1.

[0093] The penetrating crystalline waterproof coating DS5 was prepared.

[0094] Comparative Example 6 This comparative example 6 is carried out using a process similar to that of Example 1, except that in this comparative example, the cement is Portland cement.

[0095] The rest are the same as in Example 1.

[0096] The penetrating crystalline waterproof coating DS6 was prepared.

[0097] Comparative Example 7 This comparative example 7 is carried out using a process similar to that of Example 1, except that in this comparative example, the cement is aluminate cement.

[0098] The rest are the same as in Example 1.

[0099] The penetrating crystalline waterproof coating DS7 was prepared.

[0100] Test Case The coating obtained in the above example was subjected to performance tests, and the results are shown in Table 1; Among them, the test standard for bond strength is GB 18445-2012; The test standard for flexural strength is JC / T 984-2011; The test standard for compressive strength is JC / T 984-2011; The test standard for the anti-seepage pressure ratio of the mortar coating on the back water surface is GB 18445-2012; The test standard for the anti-seepage pressure ratio of the mortar coating on the back water surface is GB 18445-2012; The test standard for the secondary impermeability pressure ratio of the backwater mortar is GB 18445-2012, in which concrete blocks are replaced by mortar blocks; The test standard for freeze-thaw cycle mass loss rate is JGJ / T 70.

[0101] Table 1

[0102] The results in Table 1 demonstrate that the performance of penetrating, crystalline waterproof coatings is influenced by multiple factors. From a synergistic perspective, the optimal combination of composite bioactive microspheres and high-molecular-weight, water-absorbing polymers achieves superior performance, surpassing solutions using a single bacterial strain, a simple blend, or even one component omitted. Specific component ratios (e.g., the cement, polymer, and filler ratios in Example 1) and the appropriate dosage of bioactive microspheres and bacterial strain ratio are crucial for optimal performance.

[0103] In summary, the scheme of the present invention can significantly improve the mechanical properties of the coating, such as bonding strength, flexural strength, compressive strength, etc., and performs well in terms of back-water surface impermeability and secondary impermeability, effectively solving the problem of failure of the waterproof layer due to insufficient impermeability of the product in actual use; at the same time, the product also has good self-repair ability and durability, and the mass loss rate after freeze-thaw cycles is low, which effectively guarantees the integrity and stability of the coating during use, greatly extends the effective use cycle of the product and improves its performance.

[0104] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A composition for a penetrating crystallization waterproof coating, characterized in that: The composition contains a main agent and auxiliary agents; the main agent includes cement, bioactive microspheres, high molecular water-absorbing polymer, filler, and latex powder; Based on the total mass of the composition, the content of the cement is 36-58wt%, the content of the bioactive microspheres is 0.5-5wt%, the content of the high molecular weight water-absorbing polymer is 0.01-0.05wt%, the content of the filler is 37-59wt%, the content of the latex powder is 2-6wt%, and the content of the additive is 0.45-1.2wt%. The cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:11-55; The bioactive microspheres are prepared by a method comprising the following steps: mixing a mixed bacterial liquid containing Bacillus pasteurianus and Candida utilis with sodium alginate and calcium acetate to obtain the bioactive microspheres.

2. The composition according to claim 1, characterized in that Based on the total mass of the composition, the content of the cement is 45-52wt%, the content of the bioactive microspheres is 1-3wt%, the content of the high molecular weight water-absorbing polymer is 0.01-0.02wt%, the content of the filler is 40-55wt%, the content of the latex powder is 3-5wt%, and the content of the additive is 0.45-1.2wt%.

3. The method according to claim 1 or 2, characterized in that The cement is a combination of aluminate cement and silicate cement in a mass ratio of 1:22-50; And / or, the high molecular weight water-absorbing polymer is selected from at least one of cross-linked polyacrylamide, sodium polyacrylate, and chitosan derivatives.

4. The composition according to any one of claims 1 to 3, characterized in that The high molecular weight water-absorbing polymer is a combination of cross-linked polyacrylamide and chitosan derivatives in a mass ratio of 1:2-5; And / or, the number average molecular weight of the cross-linked polyacrylamide is 100,000-500,000, and the average particle diameter is 45-150 μm; And / or, the chitosan derivative has a number average molecular weight of 10,000-50,000 and a water absorption rate of 50-150 g / g.

5. The composition according to any one of claims 1 to 4, characterized in that The filler is selected from at least one of sand, silica fume and heavy calcium; And / or, the filler is a combination of silica fume, heavy calcium carbonate and sand and gravel in a mass ratio of 1:1.25-5:7.5-22.5; And / or, the average particle diameter of the sand and gravel is 0.1-0.4 mm; the bulk density of the silica fume is less than 300 g / L; and the average particle diameter of the heavy calcium carbonate is 0.07-0.08 mm.

6. The composition according to any one of claims 1 to 5, characterized in that In the preparation step of the bioactive microspheres, the total concentration of the mixed bacterial solution is 10 7 -10 8 CFU / mL, the CFU concentration ratio of the Bacillus pasteurianus to the Candida utilis is 1:0.4-0.

6.

7. The composition according to any one of claims 1 to 6, characterized in that The auxiliary agent contains defoaming agent, water reducing agent, water retaining agent and water repellent; And / or, based on the total mass of the composition, the content of the defoaming agent is 0.1-0.3wt%, the content of the water reducing agent is 0.05-0.15wt%, the content of the water retaining agent is 0.1-0.2wt%, and the content of the water repellent is 0.2-0.4wt%.

8. A method for preparing a penetrating crystalline waterproof coating, characterized in that: The method is carried out using the composition described in any one of claims 1 to 7, comprising: mixing and reacting a mixture of the components of the composition for a penetrating crystalline waterproof coating to obtain the penetrating crystalline waterproof coating.

9. A penetrating crystallization waterproof coating prepared by the method according to claim 8.

10. Use of the penetrating crystalline waterproof coating according to claim 9 in the field of building waterproofing.

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