Anti-permeation waterproof mortar, preparation method and application thereof
By introducing water-soluble monomers and initiators into the waterproof mortar to form a three-dimensional network structure, the problem of insufficient waterproof performance on the back side of existing waterproof mortars is solved, achieving a highly efficient waterproof and seepage-proof effect, and making it suitable for waterproof and seepage-proof applications on the back side of buildings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FOSHAN KESHUN BUILDING MATERIAL CO LTD
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-14
AI Technical Summary
The existing anti-seepage and waterproof mortar has insufficient anti-seepage performance and is difficult to meet the anti-seepage and waterproof requirements of the back water surface of buildings, especially under long-term water pressure, it is prone to seepage.
By introducing water-soluble vinyl monomers containing amide groups and N-substituted acrylamide monomers into the waterproof mortar, and utilizing the redox reaction of persulfate initiator and ethanolamine accelerator, a three-dimensional network structure is formed, which enhances the adhesion and waterproof effect of the polymer. The polymer is also tightly bound to cement particles through the hydrogen bonding of the amide groups, and the polymer expands when it comes into contact with water to block the gaps between the particles.
It achieves an anti-seepage pressure of over 5.5MPa, significantly higher than conventional mortar, effectively resisting long-term water pressure penetration, and achieving excellent waterproof and seepage-proof effects even with thin-layer construction.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of building materials technology, and in particular to an anti-seepage and waterproof mortar, its preparation method and application. Background Technology
[0002] Waterproof mortar is a non-toxic, odorless, and environmentally friendly waterproof material. It uses cement as the main forming agent, combined with various fillers and aggregates, and adds various modifying agents to give ordinary mortar waterproof and seepage-resistant properties. It is a dry powder mortar widely used as a rigid waterproof material for building exterior walls. Conventional rigid waterproofing can resist water penetration, but long-term water pressure can still allow water to seep through. For example, waterproofing materials used on the back side of a structure (such as the inside of a basement or the inner wall of a tunnel) require excellent seepage-resistant and waterproof properties. The seepage-resistant and waterproof back side is also crucial for the overall waterproofing maintenance and protection of the building.
[0003] Existing technology CN118084416A discloses a special mortar for moisture-proof, seepage-proof, and crack-resistant backwater surfaces and its preparation method. This special mortar for moisture-proof, seepage-proof, and crack-resistant backwater surfaces comprises the following raw material components by weight: 100 parts cement, 35-45 parts fine aggregate, 40-50 parts coarse aggregate, 1-5 parts modified polypropylene fiber, 0.3-0.5 parts water-reducing agent, 18-20 parts water, 50-54 parts composite moisture-proof resin, and 0.3-0.5 parts defoamer. Its main improvement in seepage-proof and waterproofing effect is achieved through modifying the polypropylene fiber to reduce fiber clumping and the addition of composite moisture-proof resin. Although there is some improvement, the 28-day seepage pressure resistance can only reach 1.5 MPa, which only meets the seepage resistance requirements of ordinary waterproof mortar and cannot meet the current seepage-proof and waterproofing requirements for backwater surfaces. Summary of the Invention
[0004] This invention addresses the shortcomings of current waterproof mortars, which have insufficient waterproof performance and are unable to meet the waterproof requirements of the back side. It provides a waterproof mortar that, through the synergistic effect of its components, further enhances the waterproof and anti-seepage effect of the mortar and can resist long-term water pressure penetration.
[0005] Another object of the present invention is to provide a method for preparing waterproof mortar.
[0006] Another object of the present invention is to provide an application of an impermeable and waterproof mortar in waterproofing and impermeability of the back side of a building.
[0007] Firstly, this invention protects a waterproof and impermeable mortar. It includes two independent components, A and B. Component A includes cement, aggregate and persulfate initiator. By mass, component B consists of the following raw materials: The mixture contains 50-60 parts of amide-containing vinyl monomers, 270-290 parts of N-substituted acrylamide monomers, 0.1-0.15 parts of crosslinking agent, and 0.02-0.03 parts of ethanolamine accelerator. The mass ratio of persulfate initiator, ethanolamine accelerator, and crosslinking agent is 1:0.1~0.6:0.2~1.5.
[0008] According to the waterproof mortar protected by the present invention, preferably, the mass ratio of the amide-containing vinyl monomer to the N-substituted acrylamide monomer is 1:5~6.
[0009] According to the waterproof mortar protected by the present invention, preferably, the vinyl monomer containing amide groups is selected from any one of methacrylamide and acrylamide; And / or, the N-substituted acrylamide monomer is selected from either N-hydroxymethylacrylamide or N-isopropylacrylamide.
[0010] According to the waterproof mortar protected by the present invention, preferably, the ethanolamine accelerator is selected from either monoethanolamine or triethanolamine; And / or, the crosslinking agent is selected from any one of N,N'-methylenebisacrylamide and polyethylene glycol diacrylate.
[0011] According to the waterproof mortar protected by the present invention, preferably, the cement in component A is a mixture of silicate cement and sulfur aluminate cement, and preferably the mass ratio of silicate cement to sulfur aluminate cement is 1:0.1~0.2; And / or, the aggregate in component A is a mixture of 100-mesh quartz sand and 60-mesh quartz sand, preferably with a mass ratio of 1:0.8~1.2 of 100-mesh quartz sand and 60-mesh quartz sand.
[0012] According to the waterproof mortar protected by the present invention, preferably, component A comprises the following components by weight: 50-60 parts cement, 35-45 parts aggregate, 0.1-0.2 parts polypropylene fiber, 0.1-0.3 parts ammonium persulfate, 0.1-0.2 parts defoamer, 0.2-0.3 parts water-reducing agent, and 0.1-0.2 parts cellulose ether.
[0013] Secondly, the present invention also specifically protects a method for preparing an impermeable and waterproof mortar, comprising the following steps: S1. Mix the components of component A to obtain component A of the waterproof mortar; S2. Dissolve the ethanolamine accelerator in component B in water, then add the vinyl monomer containing amide groups and the N-substituted acrylamide monomer in sequence to dissolve and mix. Add the crosslinking agent while stirring, and mix to obtain component B of the waterproof mortar.
[0014] According to the method for preparing an impermeable and waterproof mortar protected by the present invention, preferably, the stirring speed in step S2 is 400-500 r / min, and the crosslinking agent is added for 15-30 minutes.
[0015] Thirdly, the present invention also specifically protects the application of an impermeable and waterproof mortar in waterproofing and impermeability of the back side of a building.
[0016] According to the application protected by the present invention, it is preferably used as a slurry mixed with component A in a mass ratio of 1:0.1 to 0.3 to component B.
[0017] According to the application protected by the present invention, preferably, the thickness of the waterproof mortar on the back side of the building is 1.5~2.5mm.
[0018] Beneficial effects: This invention provides a waterproof and impermeable mortar, whose component B contains water-soluble vinyl monomers with amide groups and N-substituted acrylamide monomers. These monomers can penetrate into the gaps between mortar particles with water. The persulfate initiator in component A and the ethanolamine accelerator in component B can simultaneously initiate cement hydration and water-soluble monomer polymerization reactions, thereby achieving in-situ polymerization and solidification of polymer monomers in the gaps between mortar particles to form a three-dimensional network structure. The amide polymers also rapidly absorb water and expand upon contact with water, further sealing the gaps between mortar particles and enhancing the waterproof and impermeable effect. It can resist long-term water pressure penetration, reaching an ultra-high impermeability pressure of over 5.5 MPa, far exceeding the 1.5 MPa impermeability pressure of ordinary waterproof mortars.
[0019] The waterproof mortar of this invention can be widely used in the field of waterproofing and seepage prevention on the back side of buildings. The construction thickness only needs to be 1.5-2.5mm to achieve effective waterproofing and seepage prevention. It can also achieve long-term non-leakage even when subjected to pressure penetration perpendicular to the surface of the waterproof layer. Detailed Implementation
[0020] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention. Where specific techniques or conditions are not specified in the examples, they should be performed according to the techniques or conditions described in the literature in this field, or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased from legitimate channels.
[0021] In a specific embodiment, the present invention provides an anti-seepage and waterproof mortar, comprising independently existing component A and component B, wherein component A includes cement, aggregate and persulfate initiator; By weight, component B comprises the following raw materials: The mixture contains 50-60 parts of amide-containing vinyl monomers, 270-290 parts of N-substituted acrylamide monomers, 0.1-0.15 parts of crosslinking agent, and 0.02-0.03 parts of ethanolamine accelerator. The mass ratio of persulfate initiator, ethanolamine accelerator, and crosslinking agent is 1:0.1~0.6:0.2~1.5.
[0022] It should be noted that: The waterproof mortar of this invention is divided into two independent components, A and B, before use. Component B contains water-soluble vinyl monomers with amide groups and N-substituted acrylamide monomers. The vinyl monomers with amide groups provide flexibility after polymerization, while the N-substituted acrylamide monomers provide rigidity and strength. The copolymer of the two can balance rigidity and flexibility. Both are water-soluble monomers, which can penetrate into the gaps between mortar particles with water during mixing and polymerize in situ within these gaps. After curing, it effectively provides waterproofing.
[0023] During use, persulfate in component A acts as an initiator, and ethanolamines in component B act as accelerators. After mixing, the two undergo a redox reaction to generate primary free radicals, which promote the polymerization of olefin monomers, vinyl monomers containing amide groups, and N-substituted acrylamide monomers. At the same time, the crosslinking agent in component B acts synergistically to form a three-dimensional network structure in the polymer, increasing the polymer strength and stability.
[0024] The hydrogen bonds on the amide groups of the polymer produced by the in-situ polymerization of olefin monomers in component B effectively interact with the surface of the polar particles (cement and fillers) in component A, providing strong adhesion. This allows the waterproof and seepage-resistant polymer to be firmly embedded within the mortar, better resisting long-term water pressure penetration. The hydrogen bonds on the amide groups also have strong hydrophilicity; the amide polymer rapidly absorbs water and swells upon contact with water, further sealing the gaps between mortar particles to achieve a waterproof and seepage-resistant effect.
[0025] The combination of persulfate initiators and ethanolamine accelerators can adjust the polymerization reaction time, balancing the hydration and polymerization reaction times of cement. This is more conducive to in-situ polymer penetration and curing. Furthermore, by controlling the mass ratio of the crosslinking agent, a three-dimensional network polymerization can be formed, increasing polymer strength and stability, and achieving better waterproofing and seepage prevention effects.
[0026] In some specific embodiments, the persulfate initiator is 1 part by mass, the ethanolamine accelerator can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, etc., and the crosslinking agent can be 0.2 part, 0.4 part, 0.6 part, 0.8 part, 1.0 part, 1.2 part / 1.5 part, etc.
[0027] In some specific embodiments, in order to achieve better waterproof and seepage-proof effects, the mass ratio of the vinyl monomer containing amide groups to the N-substituted acrylamide monomer in component B mentioned in this invention is 1:5~6, more preferably 1:5.5.
[0028] Water-soluble monomers can effectively penetrate into the gaps between mortar particles. After polymerization, the amide groups of the polymer can interact strongly with the mortar particles to achieve waterproof and seepage-proof effects. The amide groups swell when they come into contact with water, further blocking the gaps between the mortar particles and further enhancing the waterproof and seepage-proof effect, which can resist long-term water pressure penetration.
[0029] In some specific exemplary embodiments, the amide-containing vinyl monomer mentioned in this invention is selected from either methacrylamide or acrylamide.
[0030] In some specific exemplary embodiments, the N-substituted acrylamide monomers mentioned in this invention are selected from either N-hydroxymethylacrylamide or N-isopropylacrylamide.
[0031] In some specific exemplary embodiments, the ethanolamine accelerators mentioned in this invention are selected from either monoethanolamine or triethanolamine.
[0032] In some specific exemplary embodiments, the crosslinking agent mentioned in this invention is selected from any one of N,N'-methylenebisacrylamide and polyethylene glycol diacrylate.
[0033] In some specific embodiments, the cement base material in component A mentioned in this invention is a mixture of silicate cement and sulfur-aluminate cement, preferably with a mass ratio of silicate cement to sulfur-aluminate cement of 1:0.1 to 0.2. For example, it can be 1:0.1, 1:0.12, 1:0.16, 1:0.18, 1:0.2, etc.
[0034] Compared to single silicate cement, adding a specific proportion of sulfur-aluminate cement can regulate the drying speed of mortar, significantly accelerating its setting and hardening, improving early strength, reducing microcracks caused by shrinkage, and forming a denser hydration product structure, thereby effectively enhancing the material's impermeability and leak-proof capabilities. Simultaneously, it can better adapt to the polymerization reaction rates of water-soluble amide-containing vinyl monomers and N-substituted acrylamide monomers, sealing the gaps between mortar particles simultaneously with mortar curing, thus better resisting long-term water pressure penetration.
[0035] In some specific embodiments, the aggregate in component A mentioned in this invention is a mixture of 100-mesh quartz sand and 60-mesh quartz sand, preferably with a mass ratio of 1:0.8 to 1.2, such as 1:0.8, 1:0.9, 1:1.0, 1:1.1, etc.
[0036] Using a specific ratio of quartz sand of different particle sizes as aggregate can balance the shrinkage during mortar drying and prevent cracking, thereby effectively improving the material's impermeability and leak-proof capability.
[0037] In some specific embodiments, the waterproof mortar mentioned in this invention, by weight, includes the following components in component A: 50-60 parts cement, 35-45 parts aggregate, 0.1-0.2 parts polypropylene fiber, 0.1-0.3 parts persulfate initiator, 0.1-0.2 parts defoamer, 0.2-0.3 parts water-reducing agent, and 0.1-0.2 parts cellulose ether.
[0038] The role of polypropylene fibers is to improve compressive and flexural strength, and reduce the risk of mortar cracking. Cellulose ethers are used to increase the viscosity of mortar, making it easier to apply.
[0039] The defoamer mentioned in this invention can be selected from any one of organosilicon, polyether, and mineral oil.
[0040] The water-reducing agent mentioned in this invention can be selected from any one of lignin sulfonate, naphthalene-based high-efficiency water-reducing agent, and melamine-based high-efficiency water-reducing agent.
[0041] The persulfate initiator mentioned in this invention can be ammonium persulfate, etc.
[0042] In this invention, component A forms a rigid inorganic matrix with cement and aggregates, and polypropylene fibers are used to suppress crack formation. Water-reducing agents, defoamers, and cellulose ethers work together to improve workability and density. After being mixed with component B by an initiator, a polymer network is formed in situ, resulting in mortar with high strength, low shrinkage, few cracks, and a dense structure, achieving excellent anti-seepage and waterproofing effects.
[0043] In a specific embodiment, the present invention also provides a method for preparing anti-seepage and waterproof mortar, comprising the following steps: S1. Mix the components of component A to obtain component A of the waterproof mortar; S2. Dissolve the ethanolamine accelerator in component B in water, then add the vinyl monomer containing amide groups and the N-substituted acrylamide monomer in sequence to dissolve and mix. Add the crosslinking agent while stirring, and mix to obtain component B of the waterproof mortar.
[0044] It should be noted that: In the preparation method of the waterproof mortar of the present invention, components A and B of the mortar are prepared independently. The ethanolamine accelerator added first to component B is an organic base that rapidly increases the pH value of the system, creating an alkaline environment. This alkaline environment inhibits the condensation reaction between hydroxymethyl and amide groups, thereby preventing crosslinking, thickening, or gelation of component B before mixing with component A, ensuring the stability of the components. Then, vinyl monomers containing amide groups and N-substituted acrylamide monomers are added as a skeleton to form a homogeneous environment, followed by the addition of a crosslinking agent for reaction.
[0045] In step S2, the crosslinking agent is the key to building the three-dimensional network. By controlling the order of addition of each component, it is possible to avoid premature addition that could lead to excessively high local concentrations or temperature changes that could cause weak prepolymerization, resulting in increased solution viscosity or even the formation of gel particles, which would affect the uniformity of the final mortar.
[0046] In this invention, the waterproof mortar is used only when components A and B are mixed. During the mixing process, the water-soluble monomers in component B can effectively penetrate into the gaps between mortar particles. The persulfate initiator and ethanolamine accelerator cause the cement hydration and polymerization reactions to occur simultaneously, which is more conducive to the in-situ polymerization and curing of the polymer. After the polymerization reaction, the amide groups of the polymer can interact strongly with the mortar particles, and the monomers are more tightly bound to the inorganic particles in component A, improving the density of the mortar and achieving the effect of waterproofing and seepage prevention. The amide groups expand when they come into contact with water, further blocking the gaps between mortar particles and further enhancing the waterproofing and seepage prevention effect, which can resist long-term water pressure penetration.
[0047] In some specific embodiments, the stirring speed mentioned in step S2 is 400~500 r / min, and the stirring time for adding the crosslinking agent is 15~30 min.
[0048] In some specific implementations, the mixing of component A of the waterproof mortar can be carried out in the following manner: Using a plow-type mixer, add the following components in sequence: 100-mesh quartz sand, 60-mesh quartz sand, ordinary silicate cement PO42.5R, polypropylene fiber, defoamer, water-reducing agent, cellulose ether, and ammonium persulfate. Mix in the mixer for 15-20 minutes to obtain component A of the waterproof mortar.
[0049] In a specific embodiment, the present invention also provides an application of anti-seepage and waterproof mortar in waterproofing and anti-seepage of the back side of a building.
[0050] In some specific exemplary application embodiments, the anti-seepage and waterproof mortar mentioned in this invention is used as a slurry mixed with component A and component B in a mass ratio of 1:0.1 to 0.3. For example, it can be a point value of 1:0.1, 1:0.2, 1:0.3 or any range of values, preferably 1:0.3.
[0051] By controlling the mass ratio of component A to component B, the uniformity of water-soluble polymer monomer penetration in mortar can be improved, ensuring the density and strength of the mortar after molding, and enhancing its anti-seepage and waterproof performance.
[0052] In some specific embodiments, the waterproof mortar mentioned in this invention is applied to the waterproofing and seepage prevention of the back water surface of a building. The construction thickness of the waterproof mortar on the back water surface of the building is 1.5~2.5mm. A good long-term pressure resistance and seepage prevention effect can be achieved with a relatively thin construction thickness.
[0053] Mortar, as a rigid waterproofing material, can be applied to construction surfaces subjected to long-term water pressure, such as the exterior walls of pools above ground level, to achieve waterproofing and seepage prevention. Backwater-resistant polymer cement waterproof mortar, a waterproofing material specifically designed for use on the backwater side of structures (such as the interior of basements or tunnel walls), can form an effective waterproof layer on the back side under water pressure, making it crucial for building waterproofing repair and protection.
[0054] The sources of the relevant raw materials in the embodiments and comparative examples of the present invention are explained below: The 100-mesh quartz sand mentioned is 100-mesh quartz sand from Guangdong Aosheng New Materials Co., Ltd.
[0055] The 60-mesh quartz sand is from Guangdong Aosheng New Materials Co., Ltd.
[0056] The cement is ordinary Portland cement PO52.5R from Yingde Kaixin Logistics Co., Ltd.
[0057] The sulfur-aluminate cement is the sulfur-aluminate cement produced by Yunyan Chemical.
[0058] The polypropylene fiber is from Changzhou Tianyi Engineering Fiber Co., Ltd.
[0059] The defoamer is an organosilicon defoamer, selected from Kefeng Chemical DA480.
[0060] The water-reducing agent is a polycarboxylate water-reducing agent from Jinan Juxin Chemical Co., Ltd.
[0061] The ammonium persulfate is from Guangzhou Shuaiyuan Chemical Co., Ltd.
[0062] Methacrylamide is the methacrylamide produced by Shandong Yukang Chemical Co., Ltd.
[0063] Triethanolamine is the triethanolamine produced by Shandong Youwang Chemical Products Co., Ltd.
[0064] N-hydroxymethylacrylamide (NMA) is the NMA of Nanjing Bermuda Biotechnology Co., Ltd.
[0065] NN Methylenebisacrylamide, produced by Jinan Jinyu Chemical Co., Ltd.
[0066] Example 1 A waterproof mortar with impermeability includes two independent components, A and B, as shown in Table 1 below.
[0067] Table 1. Content of each component in Component A and Component B (by mass parts)
[0068] This embodiment 1 also provides a method for preparing anti-seepage and waterproof mortar, including the following steps: S1 uses a plow-type mixer to sequentially add 100-mesh quartz sand, 60-mesh quartz sand, ordinary silicate cement PO42.5R, polypropylene fiber, defoamer, water-reducing agent, cellulose ether, and ammonium persulfate. The mixture is stirred in the mixer for 15-20 minutes to obtain component A. S2. Water is pumped into the reactor, and stirring is started at 500 r / min. Triethanolamine is added first, and stirring is maintained at 500 r / min for 5 min. Then acrylamide and N-hydroxymethylacrylamide (NMA) are added, and stirring is maintained at 500 r / min for 5 min. Under stirring, crosslinking agent NNmethylenebisacrylamide solution is added, and the reaction is stirred for 20 min to obtain component B.
[0069] When using, mix A:B in a ratio of 1:0.3, stir to form a uniform slurry, and apply as a 2mm thick layer.
[0070] Example 2 A waterproof mortar with impermeability includes two independent components, A and B, which are basically the same as in Example 1, except that the mass ratio of methacrylamide and N-hydroxymethylacrylamide in component B is adjusted to 1:4.5 while maintaining the total weight of monomers.
[0071] Example 3 A seepage-resistant and waterproof mortar includes two independent components, A and B, which are basically the same as in Example 1, except that the amount of ammonium persulfate in component A is adjusted, and the mass ratio of ammonium persulfate in component A to triethanolamine in component B is changed to 1:0.6.
[0072] Example 4 A seepage-resistant and waterproof mortar, comprising independent components A and B, is essentially the same as in Example 1, except that, while maintaining the total weight percentage of cement, the mass ratio of silicate cement to sulfur-aluminate cement in component A is adjusted to 1:0.4. Example 5 A seepage-resistant and waterproof mortar includes two independent components, A and B, which are basically the same as in Example 1, except that the mass of 100-mesh quartz sand in component A is adjusted so that the mass ratio of 100-mesh quartz sand to 60-mesh quartz sand in component A is 1:2.
[0073] Example 6 An example of an anti-seepage and waterproof mortar is used for waterproofing and seepage prevention on the back side of a building. When using it, the mortar is mixed in a ratio of A:B=1:0.4, stirred into a uniform slurry, and then applied by troweling to a thickness of 2mm.
[0074] Comparative Example 1 A type of waterproof mortar with impermeability is shown in Table 2 below.
[0075] Table 2. Content of each component in Comparative Example 1
[0076] Comparative Example 1 also specifically provides a method for preparing an impermeable and waterproof mortar, including the following steps: S1. Use a plow-type mixer to mix the components in component A and stir for 15 minutes to obtain component A; S2. Add water to the mixing tank, turn on the mixer and set the speed to 600 r / min, add emulsifier, methacrylamide and N-hydroxymethylacrylamide (NMA) and continue stirring for 30 min to obtain a pre-emulsion; Add 30wt% of the pre-emulsion to the reactor, and add 33wt% of the initiator solution while stirring at 600r / min to raise the reactor temperature to 70℃. React for 30min, and the liquid in the reactor will show blue light. Add the remaining pre-emulsion and initiator solution at a uniform rate (completely added within 2h). After 1.5h, add the crosslinking agent NNmethylenebisacrylamide solution, stir and keep warm for 30min, raise the temperature to 90℃, and keep warm for another 30min to obtain component B.
[0077] Mix A:B in a ratio of 1:0.3 until homogeneous, then apply as a trowel.
[0078] Comparative Example 2 A common anti-seepage and waterproof mortar is composed of cement, quartz sand, additives, and adhesive powder. The specific formula is shown in Table 3 below.
[0079] Table 3. Content of each component in Comparative Example 2 (parts by mass)
[0080] Result detection The seepage resistance pressure of the waterproof mortars used in the examples and comparative cases was tested after application. The specific testing method is as follows: JC / T984-2011 "Polymer Cement Waterproof Mortar" The specific test results are shown in Table 4.
[0081] Table 4. Permeability test results of the examples and comparative examples
[0082] Other properties of the waterproof mortar product in this embodiment were tested according to JC / T984-2011 "Polymer Cement Waterproof Mortar" Type I standard, and the testing standards are shown in Table 5 below: Table 5. Performance Test Results of Waterproof and Impermeable Mortar Products
[0083] Other performance test results of other embodiments can all meet the JC / T984-2011 "Polymer Cement Waterproof Mortar" Type I standard test in Table 5.
[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A waterproof and impermeable mortar, characterized in that, It includes two independent components, A and B. Component A includes cement, aggregate and persulfate initiator. By mass, component B consists of the following raw materials: The mixture contains 50-60 parts of amide-containing vinyl monomers, 270-290 parts of N-substituted acrylamide monomers, 0.1-0.15 parts of crosslinking agent, and 0.02-0.03 parts of ethanolamine accelerator. The mass ratio of persulfate initiator, ethanolamine accelerator, and crosslinking agent is 1:0.1~0.6:0.2~1.
5.
2. The waterproof mortar according to claim 1, characterized in that, The mass ratio of the amide-containing vinyl monomer to the N-substituted acrylamide monomer is 1:5~6.
3. The waterproof mortar according to claim 1 or 2, characterized in that, The amide-containing vinyl monomer is selected from either methacrylamide or acrylamide; And / or, the N-substituted acrylamide monomer is selected from either N-hydroxymethylacrylamide or N-isopropylacrylamide.
4. The waterproof mortar according to claim 3, characterized in that, The ethanolamine accelerator is selected from either monoethanolamine or triethanolamine. And / or, the crosslinking agent is selected from any one of N,N'-methylenebisacrylamide and polyethylene glycol diacrylate.
5. The waterproof mortar according to any one of claims 1 to 4, characterized in that, The cement in component A is a mixture of silicate cement and sulfur aluminate cement, preferably with a mass ratio of silicate cement to sulfur aluminate cement of 1:0.1~0.2; And / or, the aggregate in component A is a mixture of 100-mesh quartz sand and 60-mesh quartz sand, preferably with a mass ratio of 1:0.8~1.2 of 100-mesh quartz sand and 60-mesh quartz sand.
6. The waterproof mortar according to claim 5, characterized in that, Component A, by mass, comprises the following components: 50-60 parts cement, 35-45 parts aggregate, 0.1-0.2 parts polypropylene fiber, 0.1-0.3 parts ammonium persulfate, 0.1-0.2 parts defoamer, 0.2-0.3 parts water-reducing agent, and 0.1-0.2 parts cellulose ether.
7. A method for preparing the anti-seepage and waterproof mortar according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Mix the components of component A to obtain component A of the waterproof mortar; S2. Dissolve the ethanolamine accelerator in component B in water, then add the vinyl monomer containing amide groups and the N-substituted acrylamide monomer in sequence to dissolve and mix. Add the crosslinking agent while stirring, and mix to obtain component B of the waterproof mortar.
8. The application of the waterproof mortar according to any one of claims 1 to 6 in waterproofing and seepage prevention on the back side of a building.
9. The application according to claim 8, characterized in that, Mix the slurry according to the mass ratio of component A to component B of 1:0.1~0.
3.
10. The application according to claim 8 or 9, characterized in that, The thickness of the anti-seepage and waterproof mortar on the back side of the building is 1.5~2.5mm.