Anti-leakage self-closing waterproof mortar material and preparation method thereof

Abstract

This invention relates to the field of building waterproofing materials technology, specifically to a leak-proof self-sealing waterproof mortar material and its preparation method. The raw materials of the waterproof mortar material include the following components in the following proportions: silicate cement 20-48.5 wt%, quartz sand 20-48.5 wt%, microsilica powder 0.5-15 wt%, water-repellent agent 0.06-5 wt%, cellulose 0.006-1 wt%, water-reducing agent 0.006-1 wt%, calcium aluminate 0.1-20 wt%, dispersant colloid 0.5-15 wt%, mica 0.1-10 wt%, magnesium oxide 0.1-10 wt%, and polymer 0.006-1 wt%. The waterproof coating formed by the waterproof mortar material exhibits superior shrinkage resistance, expansion resistance, weather resistance, freeze-thaw resistance, firmness, and waterproofing. It has been practically applied to nearly 20,000 square meters for over 7 years without leakage or dampness, achieving the national standard Class 1 waterproof and damp-proof rating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building waterproof materials, and particularly relates to an anti-leakage self-closing waterproof mortar material and a preparation method thereof. BACKGROUND

[0002] Capillary tubes and micro-holes of basement concrete structures cause clear water on the inner surface, and existing cement-based penetrating crystalline mortar and organic waterproof coating cannot be solidified and formed in a short time and are easily washed away by seepage water; when there is clear water and a certain pressure in the holes and cracks, existing inorganic powder plugging materials (such as water-proof and plugging-spirit) can plug in a short time, but the materials contain a large amount of calcium sulfate component; the materials have poor expansibility, shrinkage resistance, firmness and waterproofness, and are prone to expansion cracks or falling; and acrylate and modified polyurethane grouting can temporarily plug, but the materials have poor acid, alkali and salt resistance, and the concrete structures are prone to micro-cracks and seepage, so the waterproof service life is short.

[0003] Especially, capillary tubes and micro-holes of basement concrete structures cause slow seepage, which is a difficult problem in the current building waterproof industry, and various existing waterproof materials are difficult to solve. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides an anti-leakage self-closing waterproof mortar material and a preparation method thereof, which has good expansibility, shrinkage resistance, weather resistance, firmness and flexibility.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006]

[0007]

[0008] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the raw materials of the waterproof mortar material include the following proportions of components:

[0009]

[0010] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the raw materials of the waterproof mortar material include the following proportions of components:

[0011]

[0012]

[0013] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the portland cement can be ordinary portland cement P.O or composite portland cement P.C; preferably, the portland cement is Po42.5.

[0014] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the quartz sand is made by crushing quartz ore; preferably, the mass content of silicon dioxide in the quartz sand is ≥80%, and the quartz sand is free of clay and other impurities; preferably, the particle size of the quartz sand is 20-40 mesh.

[0015] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the particle size of the microsilica powder is ≥1400 mesh, and preferably, the particle size of the microsilica powder is basically at the nanometer level.

[0016] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the microsilica powder includes silicon dioxide, calcium oxide, calcium silicate and calcium carbonate; preferably, the mass content of silicon dioxide in the microsilica powder is ≥85%.

[0017] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the microsilica powder is selected from at least one of SF-90 (the mass content of silicon dioxide is greater than or equal to 90%), SF-93 (the mass content of silicon dioxide is greater than or equal to 93%) or SF-95 (the mass content of silicon dioxide is greater than or equal to 95%).

[0018] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the microsilica powder is obtained by recovering the tail gas of a calcium carbide plant.

[0019] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the hydrophobic agent is a silane-based hydrophobic agent (such as a polysiloxane hydrophobic agent, an amino silane hydrophobic agent, etc.).

[0020] Preferably, the particle size of the hydrophobic agent is ≥200 mesh.

[0021] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the hydrophobic agent is a silane-based hydrophobic agent (such as SHP-50, etc.) and / or a sodium methyl silicate hydrophobic agent.

[0022] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the particle size of the cellulose powder is ≥80 mesh.

[0023] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the cellulose powder is hydroxypropyl methyl cellulose (HPMC).

[0024] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the water reducing agent is a naphthalene series water reducing agent; preferably, the particle size of the water reducing agent is ≥80 mesh.

[0025] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the water reducing agent is a naphthalene series water reducing agent PC-18.

[0026] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the calcium aluminate is calcium aluminate powder (such as C12A7, etc.); preferably, the particle size of the calcium aluminate powder is ≥120 mesh.

[0027] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the calcium aluminate is high-aluminum type calcium aluminate powder and / or high-calcium type calcium aluminate powder, the mass fraction of calcium oxide in the high-aluminum type calcium aluminate powder is 38-44% (such as 38%, 39%, 40%, 41%, 42%, 43% or 44%), and the mass fraction of calcium oxide in the high-calcium type calcium aluminate powder is 50-55% (such as 50%, 51%, 52%, 53%, 54% or 55%).

[0028] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the dispersed glue is dispersed glue powder; preferably, the particle size of the dispersed glue powder is ≥120 mesh.

[0029] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the dispersed glue is 328 type dispersed glue powder.

[0030] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the mica is mica powder; preferably, the particle size of the mica powder is ≥1200 mesh.

[0031] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the mica is WCYM-GF1250 mica powder, and preferably, the mass content of silicon dioxide in the mica powder is ≥49%.

[0032] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the particle size of the magnesium oxide is ≥200 mesh.

[0033] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the high molecular polymer is polyvinyl alcohol (PVA) glue powder; preferably, the particle size of the polyvinyl alcohol glue powder is ≥120 mesh.

[0034] In the anti-leakage self-closing waterproof mortar material, as a preferred embodiment, the high molecular polymer is 24-88 PVA glue powder.

[0035] The finer (the larger the mesh value) the soluble material is, the shorter the pulping time is, and the faster the hydration reaction is; the finer (the larger the mesh value) the insoluble material is, the faster the hydration reaction is, and the more sufficient the hydration reaction is, and the higher the waterproof performance is. The soluble material is: hydrophobic agent, cellulose, water reducing agent, dispersion glue, high molecular polymer (polyvinyl alcohol PVA) ; the insoluble material is: Portland cement, quartz sand, magnesium oxide, calcium aluminate, mica, microsilica powder.

[0036] In the application, the use of polyvinyl alcohol glue powder can increase the viscosity, toughness and frost resistance of the self-closing mortar; the purpose of adding cellulose is to increase the leveling property and smoothness of the self-closing waterproof mortar, but too large an amount will affect the setting time and strength of the product; too much naphthalene-based water reducing agent will cause the product to harden too early, which is not only inconvenient for construction operation, but also affects the hydration reaction of the product; too much PVA glue powder will cause the product to have too large viscosity, which is easy to block the mechanical spraying pipeline and gun mouth, and is not convenient for construction use.

[0037] In the second aspect, the application provides a preparation method of the above-mentioned anti-leakage self-closing waterproof mortar material, which comprises stirring and mixing the above-mentioned waterproof mortar raw materials in proportion to obtain the anti-leakage self-closing waterproof mortar material.

[0038] In the above-mentioned preparation method, as a preferred embodiment, the stirring is carried out in a ball tank; preferably, the rotation speed of the ball tank is 70-90 revolutions per minute; more preferably, 80 revolutions per minute;

[0039] In the above-mentioned preparation method, as a preferred embodiment, the ball tank is a stainless steel ball tank, and a propeller blade stirrer with a rotation speed of 1300-2600 revolutions per minute is added in the stainless steel ball tank for stirring, and the rotation direction of the propeller blade stirrer is opposite to the rotation direction of the ball tank.

[0040] In the present application, Portland cement and quartz sand are the main "frame" materials in waterproof mortar, just like ordinary cement mortar or concrete structure, cement mainly provides calcium, silicon, aluminum and other components for the invention product; the role of micro-silica powder is to increase the product's leveling property, stability, weather resistance, environmental protection and energy saving, and to fill the capillary and micropore in cement mortar structure; the role of hydrophobic agent is to enhance the strength of cement mortar structure, which belongs to silane and / or methyl silicic acid, preventing the capillary and micropore in waterproof mortar from absorbing water; the role of cellulose is to make the product have smoothness in use, facilitating mechanical spraying and manual pressing, and also providing hydroxyl groups required for material hydration reaction; the role of water reducing agent is to disperse and plasticize cement particles; the role of calcium aluminate is to continuously release heat, produce aluminum ions, aluminum acid components, calcium ions and hydroxyl ions during product slurry preparation, molding and self-closing, and generate more insoluble colloidal precipitates such as basic magnesium carbonate, magnesium aluminum silicate and calcium carbonate with other added materials such as hydrophobic agent, micro-silica powder, magnesium oxide, carbon dioxide in air and silicate in cement, thus having strong swelling effect; the role of dispersion glue is to maximize the dispersion of micro-fine raw materials in water medium and also has certain adhesion effect; the role of mica is to increase the density of the invention product, improve the strength of waterproof layer and increase weather resistance, and its main component is silicon dioxide; the role of magnesium oxide is to generate water-insoluble basic magnesium carbonate precipitate under alkaline conditions with carbonate ions in the product, and also reacts with harmful chloride ions in the structure to have corrosion protection effect; the role of high molecular polymer (PVA) is to increase the viscosity, toughness and frost resistance of self-closing mortar.

[0041] In the present application, Portland cement, quartz sand, micro-silica powder, hydrophobic agent, cellulose, water reducing agent, calcium aluminate, dispersion glue, mica, magnesium oxide and high molecular polymer cooperate with each other, especially the addition of hydrophobic agent, calcium aluminate and PVA glue powder, which can make multiple silicates, nano-silicon particles, aluminum ions, silicic acid ions (if the hydrophobic agent contains methyl silicic acid, there are silicic acid ions), calcium ions in cement have hydration reaction, thus generating more water-insoluble gel and precipitate. If one or more raw materials (such as hydrophobic agent or calcium aluminate) are missing, the amount of gel and / or precipitate will be reduced, which reduces the waterproof layer's resistance to shrinkage, flexibility and swelling, and cannot achieve the waterproof purpose.

[0042] Meanwhile, the dosage of each raw material also needs to be set within a specific range. If the dosage of the water-repellent agent is too high (exceeding 5.0%), it can easily lead to a decrease in the flexibility of the waterproof layer and damage to the fiberglass crack-resistant mesh used in subsequent construction. If the dosage of the water-repellent agent is too low (below 0.06%), it can easily lead to insufficient gel and / or precipitates in the waterproof layer, failing to achieve the waterproof purpose, and at the same time, reducing the strength of the waterproof layer. If the dosage of calcium aluminate is too high (exceeding 20%), it can easily lead to the product of this invention solidifying too quickly and making it impossible to construct. If the dosage of calcium aluminate is too low (below 0.1%), it can easily lead to a reduction in gel and / or precipitates, resulting in poor waterproofing effect. If the dosage of magnesium oxide is too high (exceeding 10%), it can easily lead to a decrease in the strength and flexibility of the waterproof layer. If the dosage of magnesium oxide is too low (below 0.1%), it can easily lead to a reduction in the generated magnesium aluminum silicate colloid, resulting in a decrease in waterproofing effect.

[0043] Thirdly, the present invention provides a method for using the above-mentioned mortar material, comprising: a) preparing the above-mentioned waterproof mortar material into a slurry with a solid-liquid mass ratio of 1:0.4-0.5; b) spraying or troweling the slurry onto the surface of a concrete structure to form a 2-3mm thick waterproof layer, and then curing it with water atomization 4-5 times to obtain a first-formed waterproof layer.

[0044] In the above-mentioned method of using mortar materials, as a preferred embodiment, the method further includes step c: forming a second waterproof layer of 2-3 mm on the first formed waterproof layer, and curing it by water misting 4-5 times; preferably, water misting curing is performed 2 hours after the mortar is sprayed or smeared onto the concrete structure surface or the first formed waterproof layer; preferably, the interval between steps b and c is 6-10 hours, preferably 8 hours.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0046] 1. In cases where there is visible water leakage on the inner surface of a basement concrete structure, the anti-leakage self-sealing waterproof mortar material prepared by this invention can achieve waterproofing, damp-proofing and leak-stopping construction, reaching the national standard Class 1 waterproofing and damp-proofing level (no water seepage allowed, no damp stains on the structural surface) as specified in GB50108-2008 "Technical Specification for Waterproofing of Underground Engineering". Moreover, the construction operation time is controllable: initial setting can be achieved within 15 minutes to 60 minutes.

[0047] 2. The waterproof coating formed by the anti-leakage self-sealing waterproof mortar material prepared by this invention has excellent shrinkage resistance, expansion resistance, weather resistance, freeze-thaw resistance, firmness and waterproofness, and does not peel off, crack or powder.

[0048] 3. This invention utilizes microsilica powder emitted from power plant exhaust gas, achieving waste utilization and environmental protection and energy conservation.

[0049] The anti-leakage self-sealing waterproof mortar material of the present invention has superior expansion, shrinkage resistance, weather resistance, firmness and flexibility. It is designed for leakage on the surface of concrete structures, especially basement concrete structures, and solves the problems of new cracks, bulging, powdering and peeling of waterproof coatings in the prior art, thus effectively solving a problem in the building waterproofing industry.

[0050] The anti-leakage self-sealing waterproof mortar material of this invention has been used in practical construction on nearly 20,000 square meters for more than 7 years without any leakage or dampness, and has reached the national standard level 1 waterproof and moisture-proof rating. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description, in conjunction with embodiments, provides a more comprehensive understanding of the anti-leakage self-sealing waterproof mortar material and its preparation method. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0052] The anti-seepage self-sealing waterproof mortar material of this invention is a novel powder waterproof and leak-stopping material made primarily of silicate cement and quartz sand, with added chemical substances and high-molecular polymer binders, mainly composed of silicon dioxide, aluminum trioxide, calcium oxide, and magnesium oxide. The waterproof material is prepared by mixing and compounding these components. The waterproof material is prepared at a solid-liquid mass ratio of 1:0.4-0.5, and a 2-3 mm thick waterproof layer is sprayed or troweled onto the concrete structure surface and cured with water mist 4-5 times to achieve the desired finish. Its waterproofing principle: The powder waterproofing material is mixed with water to form a slurry. At an ambient temperature above 0℃, it initially sets and forms a self-contained system within 15 to 60 minutes. Under the action of secondary or multiple seepage media, the water-soluble microparticles in the cement and admixtures undergo a harmless chemical reaction, generating water-insoluble gels and / or precipitates. These seal the capillaries and micropores in the waterproof coating, achieving the purpose of waterproofing and leak sealing. The optimal anti-seepage and self-sealing waterproofing effect is achieved after 28 days. "Self-sealing" means that after two coats of waterproof mortar are applied, localized dampness or seepage points will disappear on their own after 7-28 days without treatment. This is because the effective components in the anti-seepage and self-sealing waterproof mortar undergo further hydration chemical reactions under the action of water, generating water-insoluble precipitates that further block the capillaries and micropores in the waterproof layer, achieving the purpose of leak sealing.

[0053] Example 1

[0054] (1) Prepare anti-seepage self-sealing waterproof mortar according to the following proportions: 11 kg of silicate cement Po42.5, 16 kg of 30-mesh quartz sand, 3 kg of 1400-mesh microsilica powder, 0.6 kg of 200-mesh water-repellent agent powder (silyl powder water-repellent agent SPH-50), 0.02 kg of 80-mesh cellulose powder, 0.03 kg of 80-mesh naphthalene-based water-reducing agent, 2.6 kg of 120-mesh calcium aluminate powder, 4 kg of 120-mesh dispersant powder, 3 kg of 1200-mesh mica powder, 1.6 kg of 200-mesh magnesium oxide, and 0.04 kg of 120-mesh PVA adhesive powder.

[0055] (2) Preparation: Mix the raw materials according to the above proportions to obtain the anti-leakage self-sealing waterproof mortar material.

[0056] (3) Application: After adding water to the anti-seepage self-sealing waterproof mortar obtained in step (2) according to the solid-liquid mass ratio of 1:0.45, spray or trowel a 2-3mm thick waterproof layer on the inner surface of the concrete structure with visible water leakage. After 2 hours, water mist curing is performed 4-5 times. After 8 hours, spray or trowel a 2-3mm thick waterproof layer again. After 2 hours, water mist curing is performed 4-5 times. The waterproof coating is then formed.

[0057] When the anti-seepage self-sealing waterproof mortar prepared in Example 1 of this invention is used to treat the inner surface of a concrete structure with visible water leakage, it can achieve the national standard level 1 waterproof and moisture-proof rating. The waterproof layer has excellent shrinkage resistance, expansion resistance, weather resistance, freeze-thaw resistance, firmness and waterproof performance. The formed waterproof layer did not show any peeling, cracking or powdering within 7 years.

[0058] Example 2

[0059] (1) Prepare anti-seepage self-sealing waterproof mortar according to the following proportions: 12 kg of silicate cement Po42.5, 17 kg of 30-mesh quartz sand, 4 kg of 1400-mesh microsilica powder, 0.5 kg of 200-mesh water-repellent powder (silyl powder water-repellent SPH-50), 0.03 kg of 80-mesh cellulose powder, 0.04 kg of 80-mesh naphthalene-based water-reducing agent, 2.8 kg of 120-mesh calcium aluminate powder, 5 kg of 120-mesh dispersant powder, 2 kg of 1200-mesh mica powder, 1.7 kg of 200-mesh magnesium oxide, and 0.05 kg of 120-mesh PVA adhesive powder.

[0060] (2) Preparation: Mix the raw materials according to the above proportions to obtain the anti-leakage self-sealing waterproof mortar material.

[0061] (3) Application: After adding water to the anti-seepage self-sealing waterproof mortar obtained in step (2) according to the solid-liquid mass ratio of 1:0.5, spray or trowel a 2-3mm thick waterproof layer on the inner surface of the concrete structure with visible water leakage. After 2 hours, water mist curing is performed 4-5 times. After 8 hours, spray or trowel a 2-3mm thick waterproof layer again. After 2 hours, water mist curing is performed 4-5 times. The waterproof coating is then formed.

[0062] When the anti-seepage self-sealing waterproof mortar prepared in Example 2 of this invention is used to treat the inner surface of a concrete structure with visible water leakage, it can achieve the national standard level 1 waterproof and moisture-proof rating. The waterproof layer has excellent shrinkage resistance, expansion resistance, weather resistance, freeze-thaw resistance, firmness and waterproof performance. The formed waterproof layer did not show any peeling, cracking or powdering within 7 years.

[0063] Example 3

[0064] (1) Prepare the anti-seepage self-sealing waterproof mortar according to the following proportions in Table 1:

[0065] Table 1

[0066]

[0067] (2) Preparation: Mix the raw materials according to the above proportions to obtain the anti-leakage self-sealing waterproof mortar material.

[0068] (3) Usage: Add water to the anti-seepage self-sealing waterproof mortar material obtained in step (2) according to the solid-liquid mass ratio of 1:0.45 to make slurry, and then obtain the anti-seepage self-sealing waterproof mortar slurry.

[0069] For concrete structures with visible water leakage, spray or apply anti-seepage self-sealing waterproof mortar to the inner surface to form a 2-3mm thick waterproof layer. After 2 hours, perform water mist curing 4-5 times. After 8 hours, spray or apply anti-seepage self-sealing waterproof mortar again to form a 2-3mm thick waterproof layer. After 2 hours, perform water mist curing 4-5 times to complete the waterproof coating.

[0070] To further illustrate the effectiveness of the product of this invention, the following tests were conducted.

[0071] The physicochemical properties of the anti-seepage self-sealing waterproof mortar material and anti-seepage self-sealing waterproof mortar slurry prepared in this embodiment were tested. Specifically, the moisture content was tested according to GB / T8077-2012 Homogeneity Test of Concrete Admixtures - Moisture Content Analysis, and the chloride ion content was tested according to GB / T176-2017 Cement Chemical Analysis - Chloride Ion Determination. The specific test results are shown in Table 2 below.

[0072] Table 2

[0073]

[0074] In addition, the molding performance of the anti-leakage self-sealing waterproof mortar prepared in Example 3 was tested.

[0075] The setting time test was conducted according to GB / T 1346-2001, using the tested anti-seepage self-sealing waterproof mortar material instead of the cement used in the test in that standard; the seepage pressure test was conducted according to 6.5.2 of GB 23440-2009; the compressive strength and flexural strength test were conducted according to GB / T 17671; the flexibility test was conducted according to Appendix B of JC / T1004-2006; the bond strength test was conducted according to 5.4 of JC / T 907-2002; and the alkali resistance test was conducted according to GB / T16777-2008.

[0076] Heat resistance test: Three specimens were prepared for each group. The prepared anti-seepage self-sealing waterproof mortar was applied to a (70×70×20) mm cement mortar block, with a coating thickness of (5.0~6.0) mm. The specimens were moisture-cured for 7 days and then boiled in a boiling tank for 5 hours. The specimens were then removed and observed for cracking and peeling.

[0077] Freeze-thaw resistance test: Three specimens were prepared for each group. The prepared anti-leakage self-sealing waterproof mortar was applied to a (70×70×20) mm cement mortar block, with a coating thickness of (5.0~6.0) mm. After the specimens were moist-cured for 7 days, the test was conducted according to Chapter 4 of GB / T50082-2009. The temperature was set to -30℃ for 4 hours of air freezing and 4 hours of water thawing, with 25 freeze-thaw cycles. The specimens were then removed and observed for cracking and peeling.

[0078] Shrinkage rate was tested according to JC / T 603-2004, with an age of 28 days; water absorption rate was tested according to Appendix B of DL / T 5126-2001.

[0079] The specific test results are shown in Table 3 below.

[0080] Table 3

[0081]

[0082]

[0083] When the anti-seepage self-sealing waterproof mortar prepared according to the embodiments of the present invention is used to treat the inner surface of a concrete structure with visible water leakage, it can achieve the national standard level 1 waterproof and moisture-proof rating. The waterproof layer has excellent shrinkage resistance, expansion resistance, weather resistance, freeze-thaw resistance, firmness and waterproof performance. After long-term use, the formed waterproof layer has not shown any peeling, cracking or powdering.

[0084] Example 4

[0085] (1) Prepare the anti-seepage self-sealing waterproof mortar according to the following proportions in Table 4:

[0086] Table 4

[0087]

[0088]

[0089] (2) Preparation: Mix the raw materials according to the above proportions to obtain the anti-leakage self-sealing waterproof mortar material.

[0090] (3) Usage: Add water to the anti-seepage self-sealing waterproof mortar obtained in step (2) according to the solid-liquid mass ratio of 1:0.5 to make slurry, and then obtain the anti-seepage self-sealing waterproof mortar slurry.

[0091] For concrete structures with visible water leakage, spray or apply anti-seepage self-sealing waterproof mortar to the inner surface to form a 2-3mm thick waterproof layer. After 2 hours, perform water mist curing 4-5 times. After 8 hours, spray or apply anti-seepage self-sealing waterproof mortar again to form a 2-3mm thick waterproof layer. After 2 hours, perform water mist curing 4-5 times to complete the waterproof coating.

[0092] To further illustrate the effectiveness of the product of this invention, the following tests were conducted.

[0093] The physicochemical properties of the anti-seepage self-sealing waterproof mortar material and anti-seepage self-sealing waterproof mortar slurry prepared in Example 4 were tested, and the specific testing methods were the same as in Example 3. The test results are shown in Table 5 below.

[0094] Table 5

[0095]

[0096] In addition, the molding performance of the anti-leakage self-sealing waterproof mortar prepared in this embodiment was tested. The specific testing method was the same as in Example 3, and the test results are shown in Table 6 below.

[0097] Table 6

[0098]

[0099] After applying the anti-seepage self-sealing waterproof mortar prepared in Example 4 of this invention to the inner surface of a concrete structure with visible water leakage for anti-seepage and waterproof treatment, it can achieve the national standard Class 1 waterproof and moisture-proof rating. The waterproof layer has excellent shrinkage resistance, expansion resistance, weather resistance, freeze-thaw resistance, firmness, and waterproof performance. After long-term use, the formed waterproof layer has not shown any peeling, cracking, or powdering.

[0100] Comparative Example 1

[0101] This comparative example is basically the same as Example 3, except that calcium aluminate was removed from the raw materials of the anti-seepage self-sealing waterproof mortar material in Example 3, that is, calcium aluminate was not added. The composition of the remaining raw materials and the preparation method are the same as those in Example 3.

[0102] The physicochemical properties of the mortar material and mortar slurry prepared in Comparative Example 1 were tested. The specific testing methods were the same as those in Example 3. The test results are shown in Table 7 below.

[0103] Table 7

[0104]

[0105] In addition, the molding performance of the waterproof mortar prepared in this comparative example was tested. The specific testing method was the same as that in Example 3, and the test results are shown in Table 8 below.

[0106] Table 8

[0107]

[0108]

[0109] Comparative Example 2

[0110] This comparative example is basically the same as Example 3, except that the water-repellent agent in the anti-seepage self-sealing waterproof mortar material of Example 3 is removed, that is, no water-repellent agent is added. The composition of the remaining raw materials and the preparation method are the same as those in Example 3.

[0111] The mortar materials and mortar slurries prepared in Comparative Example 2 were tested for their physicochemical properties. The specific testing methods were the same as those in Example 3. The test results are shown in Table 9 below.

[0112] Table 9

[0113]

[0114] In addition, the molding performance of the waterproof mortar prepared in this comparative example was tested. The specific testing method was the same as that in Example 3, and the test results are shown in Table 10 below.

[0115] Table 10

[0116]

[0117]

[0118] Comparative Example 3

[0119] This comparative example is basically the same as Example 3, except that the PVA powder in the anti-seepage self-sealing waterproof mortar material of Example 3 is removed, that is, no PVA powder is added. The composition of other raw materials and the preparation method are the same as those in Example 3.

[0120] The physicochemical properties of the mortar material and mortar slurry prepared in Comparative Example 3 were tested. The specific testing methods were the same as those in Example 3. The test results are shown in Table 11 below.

[0121] Table 11

[0122]

[0123] In addition, the molding performance of the waterproof mortar prepared in this comparative example was tested. The specific testing method was the same as that in Example 3, and the test results are shown in Table 12 below.

[0124] Table 12

[0125]

[0126]

[0127] Comparative Example 4

[0128] This comparative example is basically the same as Example 3, except that the water-repellent agent, calcium aluminate and magnesium oxide in the anti-seepage self-sealing waterproof mortar material of Example 3 are removed at the same time, that is, no water-repellent agent, calcium aluminate and magnesium oxide are added. The composition of the remaining raw materials and the preparation method are the same as those in Example 3.

[0129] The physicochemical properties of the mortar material and mortar slurry prepared in Comparative Example 4 were tested. The specific testing methods were the same as those in Example 3. The test results are shown in Table 13 below.

[0130] Table 13

[0131]

[0132]

[0133] In addition, the molding performance of the waterproof mortar prepared in this comparative example was tested. The specific testing method was the same as that in Example 3, and the test results are shown in Table 14 below.

[0134] Table 14

[0135]

[0136] Comparative Example 5

[0137] This comparative example is basically the same as Example 3, except that the mass of calcium aluminate in the anti-seepage self-sealing waterproof mortar material of Example 3 is replaced from 0.27 kg to 0.03 kg. The composition of other raw materials and the preparation method are the same as those in Example 3.

[0138] The physicochemical properties of the mortar material and mortar slurry prepared in Comparative Example 5 were tested. The specific testing methods were the same as those in Example 3. The test results are shown in Table 15 below.

[0139] Table 15

[0140]

[0141] In addition, the molding performance of the waterproof mortar prepared in this comparative example was tested. The specific testing method was the same as that in Example 3, and the test results are shown in Table 16 below.

[0142] Table 16

[0143]

[0144]

[0145] As can be seen from the comparison of the above comparative examples and embodiments, if one or more raw materials are missing in the anti-seepage self-sealing waterproof mortar material provided by the present invention, or if the raw material ratio changes, the waterproof layer will not form within a certain period of time and will be washed away by the seepage water, it will not have a self-sealing waterproof function, it will not be strong enough and will fall off, it will age quickly, it will not be tough enough and will crack or not dense enough and will have capillary micro-seepage and dampness.

[0146] The above embodiments are merely illustrative examples and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations; therefore, any obvious variations or modifications derived therefrom remain within the scope of protection of this invention.

Claims

1. A leak-proof, self-sealing waterproof mortar material, characterized in that, The raw materials for the waterproof mortar material include the following components in the following proportions: Silicate cement 20wt%~48.5wt% Quartz sand 20wt%~48.5wt% Microsilica powder 0.5wt%~15wt% Water-repellent agent 0.06wt%~5wt%, Cellulose 0.006wt%~1wt% Water-reducing agent 0.006wt%~1wt%, Calcium aluminate 0.1wt%~20wt% Dispersion gel 0.5wt%~15wt% Mica 0.1wt%~10wt% Magnesium oxide 0.1wt%~10wt% Polymer content: 0.006 wt%~1 wt%; The hydrophobic agent is a silane hydrophobic agent and / or sodium methylsilicate hydrophobic agent, the calcium aluminate is C12A7, and the polymer is polyvinyl alcohol powder.

2. The anti-leakage self-sealing waterproof mortar material as described in claim 1, characterized in that, The raw materials for the waterproof mortar material include the following components in the following proportions: Silicate cement 22.3wt%~48.5wt% Quartz sand 44.7wt%~48.5wt% Microsilica powder 0.62wt%~9wt% Water-repellent agent 0.06wt%~2wt%, Cellulose 0.006wt%~0.09wt% Water-reducing agent 0.006wt%~0.1wt%, Calcium aluminate 0.47wt%~10wt% Dispersion gel 0.62wt%~12.5wt% Mica 0.31wt%~7.5wt% Magnesium oxide 0.15wt%~5wt% Polymer content: 0.006 wt%~0.25 wt%; Alternatively, the raw materials of the waterproof mortar material may include the following components in the following proportions: Silicate cement 29wt%~48.5wt% Quartz sand 40wt%~48.5wt% Microsilica powder 1.0wt%~2.5wt%, Water-repellent agent 0.5wt%~1.0wt%, Cellulose 0.05wt~0.15wt%, Water-reducing agent 0.01wt~0.1wt%, Calcium aluminate 0.5wt%~1.5wt% Dispersion gel 2.0wt~15wt%, Mica 0.6wt%~9.0wt% Magnesium oxide 0.4wt%~5.0wt% Polymer content: 0.02wt%~0.3wt%.

3. The anti-leakage self-sealing waterproof mortar material as described in claim 1 or 2, characterized in that, The silicate cement is ordinary silicate cement or composite silicate cement; And / or, the quartz sand is made by crushing quartz ore.

4. The anti-leakage self-sealing waterproof mortar material as described in claim 3, characterized in that, The silicate cement is ordinary silicate cement with a strength grade of 42.

5.

5. The anti-leakage self-sealing waterproof mortar material as described in claim 3, characterized in that, The silica content in the quartz sand is ≥80% by mass.

6. The anti-leakage self-sealing waterproof mortar material as described in claim 3, characterized in that, The quartz sand has a particle size of 20-40 mesh.

7. The anti-leakage self-sealing waterproof mortar material as described in claim 1 or 2, characterized in that, The particle size of the microsilica powder is ≥1400 mesh; And / or, the particle size of the hydrophobic agent is ≥200 mesh; And / or, the cellulose has a particle size of ≥80 mesh; And / or, the water-reducing agent is a naphthalene-based water-reducing agent; And / or, the calcium aluminate is calcium aluminate powder.

8. The anti-leakage self-sealing waterproof mortar material as described in claim 7, characterized in that, The water-reducing agent has a particle size of ≥80 mesh.

9. The anti-leakage self-sealing waterproof mortar material as described in claim 7, characterized in that, The particle size of the calcium aluminate powder is ≥120 mesh.

10. The anti-leakage self-sealing waterproof mortar material as described in claim 1 or 2, characterized in that, The dispersant is a dispersant powder; And / or, the mica is mica powder; And / or, the particle size of the magnesium oxide is ≥200 mesh; And / or, the particle size of the polyvinyl alcohol powder is ≥120 mesh.

11. The anti-leakage self-sealing waterproof mortar material as described in claim 10, characterized in that, The particle size of the dispersing powder is ≥120 mesh.

12. The anti-leakage self-sealing waterproof mortar material as described in claim 10, characterized in that, The mica powder has a particle size of ≥1200 mesh.

13. The method for preparing the anti-leakage self-sealing waterproof mortar material according to any one of claims 1-12, characterized in that, The method includes mixing the raw materials in the proportions described in any one of claims 1-12 to obtain the anti-leakage self-sealing waterproof mortar material.

14. The preparation method according to claim 13, characterized in that, The stirring is carried out in a spherical tank.

15. The preparation method according to claim 14, characterized in that, The spherical tank rotates at a speed of 70-90 revolutions per minute.

16. The preparation method according to claim 14, characterized in that, The spherical tank rotates at a speed of 80 revolutions per minute.

17. The method of using the anti-leakage self-sealing waterproof mortar material according to any one of claims 1-12, characterized in that, include: a. Prepare the waterproof mortar material into a slurry with a solid-liquid mass ratio of 1:0.4-0.5; b. Spray or trowel the slurry onto the surface of the concrete structure to form a 2-3mm thick waterproof layer, and cure it with water mist 4-5 times to obtain the first formed waterproof layer.

18. The method of use as described in claim 17, characterized in that, The method of use also includes step c: forming a second waterproof layer of 2-3mm on the first waterproof layer, and curing it with water mist 4-5 times.

19. The method of use as described in claim 18, characterized in that, Two hours after the slurry is sprayed or smeared onto the concrete structure surface or the first formed waterproof layer, water mist curing is carried out.

20. The method of use as described in claim 19, characterized in that, The interval between steps b and c is 6 to 10 hours.

21. The method of use as described in claim 19, characterized in that, The interval between steps b and c is 8 hours.

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