A method for the preparation of a modified cement-based polymer mortar
By using a modified cement-based polymer mortar preparation method, the waterproofing and construction performance of cement mortar are improved by utilizing specific materials and processes. This solves the problems of corrosion and cracking of cement mortar in humid environments, achieving efficient and low-cost construction results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
- Filing Date
- 2025-01-23
- Publication Date
- 2026-07-24
AI Technical Summary
Existing cement mortar is prone to water absorption, corrosion, and cracking in humid environments. Furthermore, polymer cement waterproof mortar has low compressive strength, high shrinkage rate, and poor corrosion resistance, resulting in difficult construction and high costs.
Modified cement-based polymer mortar is prepared by using nano-aluminum sol, volcanic rock powder, silicate cement, palygorskite powder, modified fiber, industrial solid waste powder, styrene-acrylic emulsion, etc., and adding flocculants and quick-setting agents, and through steps such as stirring, mixing, and curing.
It improves the compressive strength, flexural strength, and bond strength of cement mortar, enhances waterproofing and ease of construction, reduces costs, and is suitable for construction in marine environments.
Smart Images
Figure CN122444472A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a method for preparing modified mortar, specifically a method for preparing modified cement-based polymer mortar. Background Technology
[0002] With economic development and rapid urbanization, more and more people are moving to large cities, and many small and medium-sized cities are gradually modernizing. Behind the construction of these modern cities lies the construction of large-scale building projects. Mortar is one of the most widely used building materials in these projects, applied extensively in masonry and plastering. Mortar is made by mixing inorganic cementitious materials, fine aggregates, and water in a specific ratio. This material contains numerous capillaries and hydrophilic hydroxyl groups, making it prone to absorbing moisture in humid environments, leading to frost damage. Simultaneously, harmful substances can also enter the material with moisture, accelerating internal corrosion. Furthermore, soluble salts in the material are prone to water-soluble migration, forming salt deposits on the building surface, affecting its aesthetics. Therefore, developing waterproof mortar is the mainstream trend in the mortar industry at present and for some time to come.
[0003] Ordinary cement mortar is a typical brittle material with high compressive strength but low tensile, flexural, and bond strength, poor toughness, and a tendency to crack. Therefore, it struggles to meet the requirements of engineering durability and construction efficiency, significantly limiting its application in building construction. Extensive experimental research has shown that adding polymers to ordinary cement mortar can greatly improve its performance, and the polymers can maintain their effect over a long period. However, conventional polymer-modified cement waterproof mortar has relatively low compressive strength, high shrinkage, and poor acid and alkali resistance and corrosion resistance. Furthermore, due to insufficiently scientific formulation design, the coating strength is low, failing to guarantee the safety of subsequent construction. Secondly, polymers are expensive, and the large-scale addition of polymers increases the cost of cement mortar.
[0004] In view of the above, the present invention provides a method for preparing modified cement-based polymer mortar. Summary of the Invention
[0005] The main objective of this disclosure is to provide a method for preparing modified cement-based polymer mortar, so as to effectively solve the problems raised by the inventors in the background art.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for preparing modified cement-based polymer mortar includes the following raw materials: nano-aluminum sol, volcanic rock powder, silicate cement, palygorskite powder, modified fiber, industrial solid waste powder, styrene-acrylic emulsion, 3-chloro-2-hydroxypropane sulfonate ionized modified hyperbranched polyamino acid, fatty acid-based addition polymer, calcium borate gluconate, sodium lauryl polyoxyethylene ether sulfate modified crosslinked superabsorbent resin, fine sand, flocculant, quick-setting agent, and powdered water-reducing agent. The flocculant comprises at least the following components: polypropylene monomer, ammonium persulfate, and polyacrylamide; The mass fraction ratio of polypropylene monomer to ammonium persulfate is 1:0.01-0.05, and the amount of polyacrylamide used is 1wt%-3wt% of the polypropylene monomer. The quick-setting agent includes at least the following components: waterborne epoxy resin, acetone, polyvinyl alcohol, and polyurethane stearate; The content of acetone is not more than 15 wt%, the content of polyvinyl alcohol is not more than 1 wt%, and the mass fraction ratio of waterborne epoxy resin and polyurethane stearate is 1:1.5-3. The industrial solid waste is selected from one or more of the following: blast furnace slag, steel slag, red mud, fly ash, and waste gypsum. The modified cement-based polymer mortar is composed of the following raw materials by weight: 1-5 parts nano-aluminum sol, 5-15 parts volcanic rock powder, 50-100 parts silicate cement, 3-5 parts palygorskite powder, 3-5 parts modified fiber, 5-8 parts industrial solid waste powder, 15-20 parts styrene-acrylic emulsion, 5-10 parts ionized modified hyperbranched polyamino acid with 3-chloro-2-hydroxypropane sulfonate, 2-5 parts fatty acid addition polymer, 0.5-1.5 parts calcium borate gluconate, 1-2 parts lauryl polyoxyethylene ether sodium sulfate modified cross-linked superabsorbent resin, 100-150 parts fine sand, 10-15 parts flocculant, 5-15 parts quick-setting agent, and 1-2 parts powdered water-reducing agent.
[0007] Preferably, the preparation method of the 3-chloro-2-hydroxypropanesulfonic acid ionization modified hyperbranched polyamino acid is as follows: 3-Chloro-2-hydroxypropanesulfonic acid and hyperbranched polyamino acid were dissolved in a high-boiling-point solvent and stirred at 50-80℃ for 8 hours. The high-boiling-point solvent and the generated hydrogen chloride were removed by rotary evaporation to obtain 3-chloro-2-hydroxypropanesulfonic acid ionized modified hyperbranched polyamino acid. The mass ratio of 3-chloro-2-hydroxypropanesulfonic acid, hyperbranched polyamino acid, and high-boiling-point solvent is 1:1:(10-15); the high-boiling-point solvent is selected from one or more of dimethyl sulfoxide, N,N-dimethylformamide, and N-methylpyrrolidone.
[0008] Preferably, the method for preparing the fatty acid group addition polymer is as follows: Dimer acid, 3-(isobutenoyloxy)propyltrimethoxysilane, pentaerythritol monooleate, poly(ethylene glycol) phenyl ether acrylate and photoinitiator were mixed and sonicated for 20 minutes. The fatty acid-based adductor was obtained by reacting under ultraviolet light with a wavelength of 220-250 nm in a nitrogen or inert gas atmosphere for forty minutes. The mass ratio of the dimer acid, 3-(isobutenoyloxy)propyltrimethoxysilane, pentaerythritol monooleate, poly(ethylene glycol) phenyl ether acrylate and photoinitiator is 1:2:1:(0.04-0.08).
[0009] Preferably, the modified fiber is prepared by the following method: At 50-60℃, polypropylene fibers are uniformly dispersed in an aqueous solution of KH-550 with a mass concentration of 0.1-0.2%, and 5% nano-silica by mass of polypropylene fibers is added at the same time. The mixture is ultrasonically dispersed for 1-2 hours and then filtered to obtain preliminarily modified polypropylene fibers. Then, it is successively immersed in KH-550 aqueous solutions with a mass concentration of 1-1.5% and 5-5.5%, and ultrasonically dispersed for 1-2 hours respectively, and then washed with deionized water. After filtration, the fibers were dried in a vacuum oven at 60°C for eight hours, cooled to room temperature, and then placed in a container to dry to constant weight, thus obtaining the modified fibers.
[0010] A method for preparing modified cement-based polymer mortar includes the following steps: Step 1: Prepare flocculant and quick-setting agent in advance, and stir and mix the flocculant and quick-setting agent to obtain a mixture; Step 2: Mix the following ingredients in the predetermined mass proportions: 3-chloro-2-hydroxypropanesulfonic acid ionized modified hyperbranched polyamino acid, fatty acid-based addition polymer, calcium borate gluconate, volcanic rock powder, silicate cement, palygorskite powder, glass fiber powder, industrial solid waste powder, sodium lauryl polyoxyethylene ether sulfate modified cross-linked superabsorbent resin, and fine sand evenly for half an hour, then grind them to pass through a 150-200 mesh sieve to obtain a mixture. Step 3: Add the mixture obtained in Step 1 to the mixture obtained in Step 2, then add styrene-acrylic emulsion, nano aluminum sol and an appropriate amount of water, and stir to react for six minutes. Step 4: Slowly add the powdered water-reducing agent to the material obtained in Step 3 and mix thoroughly until the slurry is free of lumps; Step 5: Adjust the pH of the above slurry to neutral using triethylamine; Step 6: Pour the slurry, vibrate it, and then cure it for two weeks under standard curing conditions.
[0011] Preferably, the preparation process of the flocculant is as follows: polypropylene monomer and ammonium persulfate are added to a reaction vessel and reacted at 80°C for 10 hours; polyacrylamide is added to the reaction vessel and mixed until there is no aggregation or clumping in the mixture; the mixture in the reaction vessel is filtered and dried to obtain modified flocculant particles; the modified flocculant particles and water are mixed at a mass ratio of 1:2.5 to prepare the flocculant.
[0012] Preferably, the preparation process of the quick-setting agent is as follows: waterborne epoxy resin, acetone and polyvinyl alcohol are added to a reaction vessel and mixed evenly under constant temperature stirring, then polyamine stearate is added and fully mixed with the modified waterborne epoxy resin to prepare the quick-setting agent.
[0013] In view of this, compared with the prior art, the beneficial effects of the present invention are: (i) This application solves the defects of conventional polymer cement waterproof mortar, such as low compressive strength, large shrinkage rate and poor corrosion resistance, and has significant advantages such as good impermeability, high water absorption, high flexural strength and bonding strength, and convenient construction.
[0014] (ii) In this application, by preparing flocculants and quick-setting agents, the non-dispersibility of polymer cement-based mortar in marine environment is significantly improved, while the fluidity of polymer cement-based mortar is maintained to meet construction requirements.
[0015] (III) In this application, volcanic rock powder, silicate cement, palygorskite powder, glass fiber powder and industrial solid waste powder are added to the mortar. These materials work together to improve the density of the waterproof mortar, making it less likely to settle to the bottom, achieving a good anti-seepage effect, and making it safer and more environmentally friendly due to resource reuse. Attached Figure Description
[0016] Figure 1 The diagram shows a flowchart of the preparation method of the modified cement-based polymer mortar provided by the present invention. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Please see Figure 1 The present invention provides the following embodiments: A method for preparing modified cement-based polymer mortar includes the following raw materials: nano-aluminum sol, volcanic rock powder, silicate cement, palygorskite powder, modified fiber, industrial solid waste powder, styrene-acrylic emulsion, 3-chloro-2-hydroxypropane sulfonate ionized modified hyperbranched polyamino acid, fatty acid-based addition polymer, calcium borate gluconate, sodium lauryl polyoxyethylene ether sulfate modified crosslinked superabsorbent resin, fine sand, flocculant, quick-setting agent, and powdered water-reducing agent. Flocculants must include at least the following components: polypropylene monomer, ammonium persulfate, and polyacrylamide; The mass fraction ratio of polypropylene monomer to ammonium persulfate is 1:0.01-0.05, and the amount of polyacrylamide used is 1wt%-3wt% of the polypropylene monomer. The quick-setting agent includes at least the following components: waterborne epoxy resin, acetone, polyvinyl alcohol, and polyurethane stearate; The content of acetone shall not exceed 15 wt%, the content of polyvinyl alcohol shall not exceed 1 wt%, and the mass fraction ratio of waterborne epoxy resin and polyurethane stearate shall be 1:1.5-3. Industrial solid waste shall be selected from one or more of the following: blast furnace slag, steel slag, red mud, fly ash, and waste gypsum; The raw materials of the modified cement-based polymer mortar are as follows by weight: 1-5 parts nano-aluminum sol, 5-15 parts volcanic rock powder, 50-100 parts silicate cement, 3-5 parts palygorskite powder, 3-5 parts modified fiber, 5-8 parts industrial solid waste powder, 15-20 parts styrene-acrylic emulsion, 5-10 parts ionized modified hyperbranched polyamino acid of 3-chloro-2-hydroxypropane sulfonate, 2-5 parts fatty acid addition polymer, 0.5-1.5 parts calcium borate gluconate, 1-2 parts lauryl polyoxyethylene ether sodium sulfate modified cross-linked superabsorbent resin, 100-150 parts fine sand, 10-15 parts flocculant, 5-15 parts quick-setting agent, and 1-2 parts powdered water-reducing agent.
[0019] Specifically, the preparation method of ionized modified hyperbranched polyamino acids with 3-chloro-2-hydroxypropanesulfonic acid is as follows: 3-Chloro-2-hydroxypropanesulfonic acid and hyperbranched polyamino acid were dissolved in a high-boiling-point solvent and stirred at 50-80℃ for 8 hours. The high-boiling-point solvent and the generated hydrogen chloride were removed by rotary evaporation to obtain 3-chloro-2-hydroxypropanesulfonic acid ionized modified hyperbranched polyamino acid. The mass ratio of 3-chloro-2-hydroxypropanesulfonic acid, hyperbranched polyamino acid, and high-boiling-point solvent is 1:1:(10-15); the high-boiling-point solvent is selected from one or more of dimethyl sulfoxide, N,N-dimethylformamide, and N-methylpyrrolidone.
[0020] Specifically, the preparation method of fatty acid group addition polymers is as follows: Dimer acid, 3-(isobutenoyloxy)propyltrimethoxysilane, pentaerythritol monooleate, poly(ethylene glycol) phenyl ether acrylate and photoinitiator were mixed and sonicated for 20 minutes. The fatty acid-based adductor was obtained by reacting under ultraviolet light with a wavelength of 220-250 nm in a nitrogen or inert gas atmosphere for forty minutes. The mass ratio of dimer acid, 3-(isobutenoyloxy)propyltrimethoxysilane, pentaerythritol monooleate, poly(ethylene glycol) phenyl ether acrylate and photoinitiator is 1:2:1:(0.04-0.08).
[0021] Specifically, the preparation method of modified fibers is as follows: At 50-60℃, polypropylene fibers are uniformly dispersed in an aqueous solution of KH-550 with a mass concentration of 0.1-0.2%, and 5% nano-silica by mass of polypropylene fibers is added at the same time. The mixture is ultrasonically dispersed for 1-2 hours and then filtered to obtain preliminarily modified polypropylene fibers. Then, it is successively immersed in KH-550 aqueous solutions with a mass concentration of 1-1.5% and 5-5.5%, and ultrasonically dispersed for 1-2 hours respectively, and then washed with deionized water. After filtration, the fibers were dried in a vacuum oven at 60°C for eight hours, cooled to room temperature, and then placed in a container to dry to constant weight, thus obtaining the modified fibers.
[0022] A method for preparing modified cement-based polymer mortar includes the following steps: Step 1: Prepare flocculant and quick-setting agent in advance, and stir and mix the flocculant and quick-setting agent to obtain a mixture; Step 2: Mix the following ingredients in the predetermined mass proportions: 3-chloro-2-hydroxypropanesulfonic acid ionized modified hyperbranched polyamino acid, fatty acid-based addition polymer, calcium borate gluconate, volcanic rock powder, silicate cement, palygorskite powder, glass fiber powder, industrial solid waste powder, sodium lauryl polyoxyethylene ether sulfate modified cross-linked superabsorbent resin, and fine sand evenly for half an hour, then grind them to pass through a 150-200 mesh sieve to obtain a mixture. Step 3: Add the mixture obtained in Step 1 to the mixture obtained in Step 2, then add styrene-acrylic emulsion, nano aluminum sol and an appropriate amount of water, and stir to react for six minutes. Step 4: Slowly add the powdered water-reducing agent to the material obtained in Step 3 and mix thoroughly until the slurry is free of lumps; Step 5: Adjust the pH of the above slurry to neutral using triethylamine; Step 6: Pour the slurry, vibrate it, and then cure it for two weeks under standard curing conditions.
[0023] Specifically, the preparation process of the flocculant is as follows: polypropylene monomer and ammonium persulfate are added to a reaction vessel and reacted at 80°C for 10 hours; polyacrylamide is added to the reaction vessel and mixed until there is no aggregation or clumping in the mixture; the mixture in the reaction vessel is filtered and dried to obtain modified flocculant particles; the modified flocculant particles and water are mixed at a mass ratio of 1:2.5 to prepare the flocculant.
[0024] Specifically, the preparation process of the quick-setting agent is as follows: waterborne epoxy resin, acetone and polyvinyl alcohol are added to a reaction vessel and mixed evenly under constant temperature stirring. Then, polyamine stearate is added and fully mixed with the modified waterborne epoxy resin to prepare the quick-setting agent.
[0025] The specific implementation method of this embodiment is as follows: volcanic rock powder, silicate cement, palygorskite powder, glass fiber powder, and industrial solid waste powder are added to the mortar. These materials work synergistically to improve the density of the waterproof mortar, making it less prone to settling and achieving a good anti-seepage effect. Furthermore, resource reuse makes it safer and more environmentally friendly. By formulating flocculants and quick-setting agents, the non-dispersibility of the polymer cement-based mortar in the marine environment is significantly improved, while retaining sufficient fluidity to meet construction requirements. This solves the defects of conventional polymer cement waterproof mortar, such as low compressive strength, large shrinkage rate, and poor corrosion resistance. It also has significant advantages such as good anti-seepage properties, high water absorption, high flexural strength and bond strength, and convenient construction.
[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0027] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims
1. A modified cement-based polymer mortar, characterized in that, The modified cement-based polymer mortar is composed of nano-aluminum sol, volcanic rock powder, silicate cement, palygorskite powder, modified fiber, industrial solid waste powder, styrene-acrylic emulsion, 3-chloro-2-hydroxypropane sulfonate ionized modified hyperbranched polyamino acid, fatty acid-based addition polymer, calcium borate gluconate, sodium lauryl polyoxyethylene ether sulfate modified cross-linked superabsorbent resin, fine sand, flocculant, quick-setting agent, and powdered water-reducing agent. The flocculant includes at least the following components: polypropylene monomer, ammonium persulfate, and polyacrylamide; The mass fraction ratio of polypropylene monomer to ammonium persulfate is 1:0.01-0.05, and the amount of polyacrylamide used is 1wt%-3wt% of the polypropylene monomer. The quick-setting agent includes at least the following components: waterborne epoxy resin, acetone, polyvinyl alcohol, and polyurethane stearate; The content of acetone is not more than 15 wt%, the content of polyvinyl alcohol is not more than 1 wt%, and the mass fraction ratio of waterborne epoxy resin and polyurethane stearate is 1:1.5-3. The industrial solid waste is selected from one or more of the following: blast furnace slag, steel slag, red mud, fly ash, and waste gypsum. The modified cement-based polymer mortar is composed of the following raw materials by weight: 1-5 parts nano-aluminum sol, 5-15 parts volcanic rock powder, 50-100 parts silicate cement, 3-5 parts palygorskite powder, 3-5 parts modified fiber, 5-8 parts industrial solid waste powder, 15-20 parts styrene-acrylic emulsion, 5-10 parts ionized modified hyperbranched polyamino acid with 3-chloro-2-hydroxypropane sulfonate, 2-5 parts fatty acid addition polymer, 0.5-1.5 parts calcium borate gluconate, 1-2 parts lauryl polyoxyethylene ether sodium sulfate modified cross-linked superabsorbent resin, 100-150 parts fine sand, 10-15 parts flocculant, 5-15 parts quick-setting agent, and 1-2 parts powdered water-reducing agent.
2. The modified cement-based polymer mortar according to claim 1, characterized in that: The preparation method of the 3-chloro-2-hydroxypropanesulfonic acid ion-modified hyperbranched polyamino acid is as follows: 3-Chloro-2-hydroxypropanesulfonic acid and hyperbranched polyamino acid were dissolved in a high-boiling-point solvent and stirred at 50-80℃ for 8 hours. The high-boiling-point solvent and the generated hydrogen chloride were removed by rotary evaporation to obtain 3-chloro-2-hydroxypropanesulfonic acid ionized modified hyperbranched polyamino acid. The mass ratio of 3-chloro-2-hydroxypropanesulfonic acid, hyperbranched polyamino acid, and high-boiling-point solvent is 1:1:(10-15); the high-boiling-point solvent is selected from one or more of dimethyl sulfoxide, N,N-dimethylformamide, and N-methylpyrrolidone.
3. The modified cement-based polymer mortar according to claim 1, characterized in that: The preparation method of the fatty acid group addition polymer is as follows: Dimer acid, 3-(isobutenoyloxy)propyltrimethoxysilane, pentaerythritol monooleate, poly(ethylene glycol) phenyl ether acrylate and photoinitiator were mixed and sonicated for twenty minutes. The fatty acid-based adductor was obtained by reacting under ultraviolet light with a wavelength of 220-250 nm in a nitrogen or inert gas atmosphere for forty minutes. The mass ratio of the dimer acid, 3-(isobutenoyloxy)propyltrimethoxysilane, pentaerythritol monooleate, poly(ethylene glycol) phenyl ether acrylate and photoinitiator is 1:2:1:(0.04-0.08).
4. The modified cement-based polymer mortar according to claim 1, characterized in that: The modified fiber is prepared as follows: At 50-60℃, polypropylene fibers are uniformly dispersed in an aqueous solution of KH-550 with a mass concentration of 0.1-0.2%, and 5% nano-silica by mass of polypropylene fibers is added at the same time. The mixture is ultrasonically dispersed for 1-2 hours and then filtered to obtain preliminarily modified polypropylene fibers. Then, it is successively immersed in KH-550 aqueous solutions with a mass concentration of 1-1.5% and 5-5.5%, ultrasonically dispersed for 1-2 hours respectively, and then washed with deionized water. After filtration, the fibers were dried in a vacuum oven at 60°C for eight hours, cooled to room temperature, and then placed in a container to dry to constant weight, thus obtaining the modified fibers.
5. The method for preparing a modified cement-based polymer mortar according to claims 1-4, characterized in that, Includes the following steps: Step 1: Prepare flocculant and quick-setting agent in advance, and stir and mix the flocculant and quick-setting agent to obtain a mixture; Step 2: Mix the following ingredients in the predetermined mass proportions: 3-chloro-2-hydroxypropanesulfonic acid ionized modified hyperbranched polyamino acid, fatty acid-based addition polymer, calcium borate gluconate, volcanic rock powder, silicate cement, palygorskite powder, glass fiber powder, industrial solid waste powder, sodium lauryl polyoxyethylene ether sulfate modified cross-linked superabsorbent resin, and fine sand evenly for half an hour, then grind them to pass through a 150-200 mesh sieve to obtain a mixture. Step 3: Add the mixture obtained in Step 1 to the mixture obtained in Step 2, then add styrene-acrylic emulsion, nano aluminum sol and an appropriate amount of water, and stir to react for six minutes. Step 4: Slowly add the powdered water-reducing agent to the material obtained in Step 3 and mix thoroughly until the slurry is free of lumps; Step 5: Adjust the pH of the above slurry to neutral using triethylamine; Step 6: Pour the slurry, vibrate it, and then cure it for two weeks under standard curing conditions.
6. The method for preparing a modified cement-based polymer mortar according to claim 5, characterized in that: The preparation process of the flocculant is as follows: polypropylene monomer and ammonium persulfate are added to a reaction vessel and reacted at 80°C for 10 hours; polyacrylamide is added to the reaction vessel and mixed until there is no aggregation or clumping in the mixture; the mixture in the reaction vessel is filtered and dried to obtain modified flocculant particles; the modified flocculant particles and water are mixed at a mass ratio of 1:2.5 to prepare the flocculant.
7. The method for preparing a modified cement-based polymer mortar according to claim 5, characterized in that: The preparation process of the quick-setting agent is as follows: waterborne epoxy resin, acetone and polyvinyl alcohol are added to a reaction vessel and mixed evenly under constant temperature stirring. Then polyamine stearate is added and fully mixed with the modified waterborne epoxy resin to prepare the quick-setting agent.