A highly airtight polymer cured product, a production method thereof, and an application thereof

Abstract

The application discloses a kind of high air-tightness polymer solidified product, preparation method and its application, which comprises the following steps: adding exciter consisting of water glass and sodium hydroxide into water, heating and stirring uniformly to obtain micellar solution, and then cooling to room temperature for standby use;According to the water-glass ratio of the total amount of water in water glass and added water to the total amount of fly ash and additive, the fly ash and nano-powder additive are weighed, and the fly ash and nano-powder additive are poured into the stirring pot of cement mortar stirrer for preliminary mixing;Micellar solution is poured into the stirring pot, and the fly ash and nano-powder additive preliminarily mixed are stirred and mixed to prepare a geopolymer solidified product.The method solves the problem that the large liquid-solid ratio of the existing geopolymer significantly reduces the initial water content in the geopolymer, which reduces the mechanical properties and prolongs the curing time, and significantly improves the compactness of the geopolymer compared with the existing geopolymer, which has very important practical significance for widening the application scenarios and application fields of geopolymer.

Description

Technical Field

[0001] This invention relates to the field of geopolymer-based materials technology, and in particular to a highly airtight geopolymer solidified product, its preparation method, and its application. Background Technology

[0002] Geopolymers are a class of cementitious materials with a three-dimensional network-like inorganic polymer structure formed by silicon-oxygen tetrahedra and aluminum-oxygen tetrahedra. They were first developed by Professor Davidovits of France in the late 1970s. This structure lies between quasi-crystalline and amorphous states and does not have a specific chemical formula; it is usually represented by the general chemical formula M. x [-(Si-O2) z -Al-O] n The expression ·ωH₂O represents the molecular weight of the material, where M is an alkali metal cation, z is the Si / Al molar ratio in the structure, n represents the degree of polymerization, and ω represents the number of chemically bound water molecules. Due to this unique network-like polymer structure, these materials exhibit stable physicochemical properties, high strength, high temperature resistance, and resistance to acid and alkali corrosion. They have wide applications in fireproofing, thermal insulation, construction, heavy metal solidification, and nuclear waste containment. Summary of the Invention

[0003] In order to improve the density of geopolymers without increasing the liquid-to-solid ratio, and to give geopolymers good mechanical strength and stability, thereby enriching technical routes and increasing the selection space, this invention provides a high-airtightness geopolymer solidified product, its preparation method and its application.

[0004] In a first aspect, embodiments of the present invention provide a method for preparing a highly airtight polymer cured product, which may include:

[0005] An activator composed of water glass and sodium hydroxide is added to water, heated and stirred until homogeneous to obtain a micelle solution, which is then cooled to room temperature for later use.

[0006] Weigh the fly ash and the nanoparticle additive according to a water-cement ratio of 0.3, based on the total water content of the water in the water glass and the added water, and the total ash content of the fly ash and the nanoparticle additive. Pour the fly ash and the nanoparticle additive into the mixing pot of a cement mortar mixer for preliminary mixing. The alkali content in the activator accounts for 9% to 16% of the total ash content of the fly ash and the nanoparticle additive; the nanoparticle additive accounts for 1% to 20% of the total ash content of the fly ash and the nanoparticle additive.

[0007] The micelle solution is poured into the mixing pot and stirred and mixed with the pre-mixed fly ash and the nanoparticle additives to prepare the geopolymer solidified product.

[0008] In one embodiment, the alkali content in the activator accounts for 10% to 16% of the total ash content of the fly ash and the nanopowder additive; the nanopowder additive accounts for 1% to 3% of the total ash content of the fly ash and the nanopowder additive, or the nanopowder additive accounts for 10% to 20% of the total ash content of the fly ash and the nanopowder additive.

[0009] In another embodiment, the alkali content in the activator accounts for 13% to 16% of the total ash content of the fly ash and the nanopowder additive; the nanopowder additive accounts for 10% to 20% of the total ash content of the fly ash and the nanopowder additive.

[0010] In another embodiment, the modulus of the water glass is 0.5 to 2.5.

[0011] In another embodiment, the nanopowder additive is at least one of the following nanopowders: nano-oxides, nano-nonmetals, and nano-metals.

[0012] In another embodiment, the micelle solution is obtained by heating and stirring in the above steps. The heating parameters are 60°C and stirring parameters are 30 minutes.

[0013] In another embodiment, the stirring parameters for mixing the micelle solution with the coal powder and the nanoparticle additive in the above steps are: first, slow stirring for 2 minutes, then fast stirring for 2 minutes.

[0014] Secondly, embodiments of the present invention provide a high airtightness polymer cured product prepared according to the high airtightness polymer cured product preparation method described in the first aspect.

[0015] Thirdly, embodiments of the present invention provide an application of a high-airtightness polymer solidified material prepared according to the high-airtightness polymer solidified material preparation method described in the first aspect in construction engineering.

[0016] Fourthly, embodiments of the present invention provide an application of a high-airtightness geopolymer solidified material prepared by the high-airtightness geopolymer solidified material preparation method as described in the first aspect in well completion or cementing.

[0017] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0018] This invention provides a high-airtightness geopolymer cured product, its preparation method, and its application. The method improves the density of the geopolymer without increasing the liquid-to-solid ratio, resulting in good mechanical strength and stability. It overcomes the drawbacks of existing geopolymers where a high liquid-to-solid ratio significantly reduces the initial water content, thus prolonging curing time and reducing mechanical properties. Furthermore, it significantly improves the density of the geopolymer compared to existing methods, which is of great practical significance for broadening the application scenarios and fields of geopolymers.

[0019] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a flowchart of a method for preparing a highly airtight polymer solidified product according to an embodiment of the present invention. Detailed Implementation

[0023] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0024] The inventors discovered in practical applications that due to the high viscosity of water glass solution, geopolymers exhibit poor flowability, necessitating an increase in the liquid-to-solid ratio to enhance flowability and meet construction requirements. However, actual research indicates that an excessively high liquid-to-solid ratio also brings some negative effects. For instance, fly ash particle size significantly influences the water demand behavior of cementitious materials; with increasing amounts of large-particle fly ash, the water demand tends to increase. Increasing the initial water content in the geopolymer significantly reduces its 7-day curing performance and increases the total pore volume of the geopolymer. A high liquid-to-solid ratio can accelerate the dissolution of Si in raw materials. 4+ Al 3+Hydrolysis of the compound can hinder the condensation reaction, thus prolonging the curing time. Prolonged curing reduces the content of non-volatile water, leading to a decrease in compressive strength. Therefore, it is necessary to develop a geopolymer and its preparation method that improves the density of the geopolymer without increasing the liquid-to-solid ratio, while also providing good mechanical strength and stability. This is of great practical significance for broadening the application fields of geopolymers.

[0025] This invention provides a method for preparing the above-mentioned high-airtightness polymer cured product, referring to... Figure 1 As shown, the preparation method may include the following steps:

[0026] Step S11: Add the activator composed of water glass and sodium hydroxide to water, heat and stir until homogeneous to obtain a micelle solution, then cool to room temperature for later use. The modulus of the water glass is 0.5–2.5. In this step, the micelle solution is obtained by heating and stirring until homogeneous. The heating parameters are 60°C and stirring for 30 minutes.

[0027] Step S12: Weigh fly ash and nanoparticle additives according to a water-cement ratio of 0.3 (total water in water glass and added water to total ash content of fly ash and nanoparticle additives). Pour the fly ash and nanoparticle additives into the mixing bowl of a cement mortar mixer for preliminary mixing. The alkali content in the activator accounts for 9%–16% of the total ash content of fly ash and nanoparticle additives; the nanoparticle additives account for 1%–20% of the total ash content of fly ash and nanoparticle additives. The nanoparticle additives are at least one of the following nanoparticles: nano-oxides, nano-nonmetals, and nano-metals.

[0028] Step S13: Pour the micelle solution into a mixing pot and mix it with the pre-mixed fly ash and nanoparticle additives to prepare the geopolymer solidified product. The mixing parameters for this step are: slow mixing for 2 minutes followed by rapid mixing for 2 minutes.

[0029] The method for preparing high-airtightness geopolymer solids provided in this invention improves the density of the geopolymer without increasing the liquid-to-solid ratio, and gives the geopolymer good mechanical strength and stability. It solves the problem that increasing the initial water content of existing geopolymers with a high liquid-to-solid ratio significantly reduces their mechanical properties and prolongs the curing time. Furthermore, it significantly improves the density of the geopolymer compared to existing geopolymers, which is of great practical significance for broadening the application scenarios and fields of geopolymers.

[0030] In a preferred embodiment, the alkali content in the activator accounts for 10% to 16% of the total ash content of fly ash and nanoparticle additives; the nanoparticle additives account for 1% to 3% of the total ash content of fly ash and nanoparticle additives, or 10% to 20% of the total ash content of fly ash and nanoparticle additives. In this embodiment of the invention, by adjusting the various components of the geopolymer, the synergistic effect between the components is enhanced, resulting in a significant improvement in the airtightness of the high-airtightness geopolymer solidified product without affecting its mechanical strength and stability.

[0031] In another, more preferred embodiment, the alkali content in the activator accounts for 13% to 16% of the total ash content of fly ash and nanopowder additives; the nanopowder additives account for 10% to 20% of the total ash content of fly ash and nanopowder additives. In this embodiment of the invention, the synergistic effect among the various components of the geopolymer is further enhanced, and its airtightness is more significant.

[0032] Based on the above preparation method, the following examples and comparative examples are provided in this invention to verify the airtightness effect of the high airtightness polymer cured products prepared in this invention:

[0033] The water glass modulus used in Examples 1 to 9 and Comparative Examples 1 to 9 of this invention is 3.3, wherein the mass ratio of each component is 26.5% SiO2, 8.3% Na2O, and 65.2% H2O. The water glass modulus in these embodiments can be adjusted based on the amount of NaOH added to the activator. This process requires adjusting the water glass modulus using existing calculation formulas to determine the amount of NaOH added. The specific specifications of the nanopowder additives in these embodiments are shown in the table below:

[0034] Reagent Name Specifications or purity Nano titanium dioxide 99.8% metal basis, 60nm, anatase, hydrophilic Nano silica 99% metals basis, 30nm Nano cobalt ferrite <100nm, 99% Nano barium titanate 99.9%metals basis,<100nm Nano boron nitride 99.8%metals basis,<150nm Nano silicon powder ≥99.9%metals basis,20-60nm Nano copper-nickel alloy powder ≥98%, ≤100nm Nano iron powder 99.9% metals basis, 100-300nm Nano carbon powder ≥99.5%metals basis,powder,30nm

[0035] It should also be noted that all other raw materials and reagents involved in the embodiments and comparative examples of this invention are commercially available general reagent products.

[0036] Example 1:

[0037] Weigh 219.06g of water glass and add it to 157.17g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 53.96g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.0. Let it stand for 24 hours before use.

[0038] Weigh 900g of fly ash and pour it into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 100g of nano-titanium dioxide and pour it into the mixing bowl of the cement mortar mixer. Use a cement scraper to initially mix the two powders, add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. The curing times are 14 days, 28 days, 56 days, and 63 days. Take out samples to test their air permeability coefficient.

[0039] As a control group for Example 1, Comparative Example 1 performed the following tests:

[0040] Weigh 219.06g of water glass and add it to 157.17g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 53.96g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.0. Let it stand for 24 hours before use.

[0041] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0042] The air permeability coefficient test results for Example 1 and Comparative Example 1 are shown in Table 1 below:

[0043] Table 1. Results of air permeability tests for Example 1 and Comparative Example 1

[0044]

[0045]

[0046] Example 2:

[0047] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0048] Weigh 800g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 200g of nano-silica and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibrating table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius for curing. Curing times are 14d, 28d, 56d, and 63d. Test the air permeability coefficient of each sample.

[0049] As a control group for Example 2, Comparative Example 2 performed the following tests:

[0050] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0051] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0052] The air permeability coefficient test results for Example 2 and Comparative Example 2 are shown in Table 2 below:

[0053] Table 2. Results of air permeability tests for Example 2 and Comparative Example 2

[0054]

[0055] Example 3:

[0056] Weigh 219.14g of water glass and add it to 142.87g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 15.26g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 2.0. Let it stand for 24 hours before use.

[0057] Weigh 950g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 50g of nano-cobalt ferrite and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Test the air permeability coefficient of each sample.

[0058] As a control group for Example 3, Comparative Example 3 performed the following tests:

[0059] Weigh 219.14g of water glass and add it to 142.87g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 15.26g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 2.0. Let it stand for 24 hours before use.

[0060] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0061] The air permeability coefficient test results for Example 3 and Comparative Example 3 are shown in Table 3 below:

[0062] Table 3. Results of air permeability tests for Example 3 and Comparative Example 3

[0063]

[0064] Example 4:

[0065] Weigh 273.72g of water glass and add it to 178.46g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 9.38g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 2.5. Let it stand for 24 hours before use.

[0066] Weigh 975g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 25g of nano-barium titanate and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibrating table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Test the air permeability coefficient of each sample.

[0067] As a control group for Example 4, Comparative Example 4 performed the following tests:

[0068] Weigh 273.72g of water glass and add it to 178.46g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 9.38g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 2.5. Let it stand for 24 hours before use.

[0069] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0070] The air permeability coefficient test results for Example 4 and Comparative Example 4 are shown in Table 4 below:

[0071] Table 4. Results of air permeability tests for Example 4 and Comparative Example 4

[0072]

[0073] Example 5:

[0074] Weigh 109.53g of water glass and add it to 228.58g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 65.69g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 0.5. Let it stand for 24 hours before use.

[0075] Weigh 990g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 10g of nano boron nitride and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius for curing. Curing times are 14 days, 28 days, 56 days, and 63 days. Test the air permeability coefficient of each sample.

[0076] As a control group for Example 5, Comparative Example 5 performed the following tests:

[0077] Weigh 109.53g of water glass and add it to 228.58g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 65.69g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 0.5. Let it stand for 24 hours before use.

[0078] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0079] The air permeability coefficient test results for Example 5 and Comparative Example 5 are shown in Table 5 below:

[0080] Table 5. Results of air permeability tests for Example 5 and Comparative Example 5

[0081]

[0082] Example 6:

[0083] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0084] Weigh 950g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 50g of nano-silica powder and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibrating table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius for curing. Curing times are 14 days, 28 days, 56 days, and 63 days. Test the air permeability coefficient of each sample.

[0085] As a control group for Example 6, Comparative Example 6 performed the following tests:

[0086] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0087] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0088] The air permeability coefficient test results for Example 6 and Comparative Example 6 are shown in Table 6 below:

[0089] Table 6. Results of air permeability tests for Example 6 and Comparative Example 6

[0090]

[0091] Example 7:

[0092] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0093] Weigh 950g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 50g of nano-nickel-copper alloy powder and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibrating table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Test the air permeability coefficient of each sample.

[0094] As a control group for Example 7, Comparative Example 7 performed the following tests:

[0095] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0096] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0097] The air permeability coefficient test results for Example 7 and Comparative Example 7 are shown in Table 7 below:

[0098] Table 7. Results of air permeability tests for Example 7 and Comparative Example 7

[0099]

[0100] Example 8:

[0101] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0102] Weigh 990g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 10g of nano-iron powder and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Test the air permeability coefficient of each sample.

[0103] As a control group for Example 8, Comparative Example 8 performed the following tests:

[0104] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0105] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0106] The air permeability coefficient test results for Example 8 and Comparative Example 8 are shown in Table 8 below:

[0107] Table 8. Results of air permeability tests for Example 8 and Comparative Example 8

[0108]

[0109] Example 9:

[0110] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0111] Weigh 990g of fly ash into the mixing bowl of a cement mortar mixer, according to a water-cement ratio of 0.3. Then weigh 10g of nano-carbon powder and add it to the mixing bowl. Use a cement scraper to initially mix the two powders. Add the micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes. Pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber at 90% humidity and 30 degrees Celsius for curing. Curing times are 14 days, 28 days, 56 days, and 63 days. Take out samples to test their air permeability coefficient.

[0112] As a control group for Example 9, Comparative Example 9 performed the following tests:

[0113] Weigh 350.49g of water glass and add it to 71.48g of water. Heat the solution to 60℃, stir until homogeneous, and cool to room temperature. Then add 39.88g of NaOH to the solution and stir for 30 minutes to obtain a homogeneous micelle solution with a water glass modulus of 1.6. Let it stand for 24 hours before use.

[0114] Weigh 1000g of fly ash according to a water-cement ratio of 0.3, pour it into the mixing bowl of a cement mortar mixer, add the aforementioned micelle solution, stir slowly for 2 minutes, then stir rapidly for 2 minutes, and pour the mixture into a triple mold. Fix the triple mold onto a vibration table and compact the material. Cover with plastic wrap and place in a constant temperature and humidity curing chamber for curing at 90% humidity and 30 degrees Celsius. Curing times are 14 days, 28 days, 56 days, and 63 days. Samples are then taken out to test their air permeability coefficient.

[0115] The air permeability coefficient test results for Example 9 and Comparative Example 9 are shown in Table 9 below:

[0116] Table 9. Results of air permeability tests for Example 9 and Comparative Example 9

[0117]

[0118] Referring to Examples 1 to 9 above, and Comparative Examples 1 to 9, the air permeability test of the prepared geopolymer solidified products in the embodiments of the present invention revealed that adding nanoparticle additives significantly improved the air permeability of the geopolymer solidified products, resulting in a significant improvement in the air tightness of the geopolymer. In particular, when the alkali content in the activator accounts for 13% to 16% of the total ash content of fly ash and nanoparticle additives, and when the nanoparticle additives account for 10% to 20% of the total ash content of fly ash and nanoparticle additives, the synergistic effect among the various components in the geopolymer is further enhanced, resulting in better air tightness without affecting mechanical strength and stability.

[0119] Based on the same inventive concept, this embodiment of the invention also provides a high airtightness polymer cured product prepared by the above-described high airtightness polymer cured product preparation method.

[0120] Based on the same inventive concept, this embodiment of the invention also provides an application of the high airtightness polymer cured material prepared by the above-described high airtightness polymer cured material preparation method in construction engineering. The high airtightness polymer cured material described in this embodiment can be used as a building material in construction engineering.

[0121] Based on the same inventive concept, this embodiment of the invention also provides an application of the above-mentioned high airtightness geopolymer solidified material in well completion or cementing. Due to its significant airtightness, the high airtightness geopolymer solidified material in this embodiment can be used as a replacement material for cement in well completion or cementing.

[0122] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for preparing a highly airtight polymer cured product, characterized in that, include: An activator composed of water glass and sodium hydroxide is added to water, heated and stirred until homogeneous to obtain a micelle solution, which is then cooled to room temperature for later use. Weigh the fly ash and nanoparticle additives according to a water-cement ratio of 0.3, based on the total water content of the water in the water glass and the added water, and the total ash content of the fly ash and nanoparticle additives. Pour the fly ash and nanoparticle additives into the mixing bowl of a cement mortar mixer for preliminary mixing. The alkali content in the activator accounts for 10% to 16% of the total ash content of the fly ash and nanoparticle additives; the nanoparticle additives account for 10% to 20% of the total ash content of the fly ash and nanoparticle additives. The micelle solution is poured into the mixing pot and stirred and mixed with the pre-mixed fly ash and the nanoparticle additives to prepare the geopolymer solidified product.

2. The method according to claim 1, characterized in that, The alkali content in the activator accounts for 13% to 16% of the total ash content of the fly ash and the nanopowder additive.

3. The method according to claim 1 or 2, characterized in that, The modulus of the water glass is 0.5 to 2.

5.

4. The method according to claim 1 or 2, characterized in that, The nanopowder additive is at least one of the following nanopowders: nano-nonmetals and nano-metals.

5. The method according to claim 1 or 2, characterized in that, The micelle solution was obtained by heating and stirring until homogeneous. The heating parameters were 60°C and stirring parameters were 30 minutes.

6. The method according to claim 1 or 2, characterized in that, The mixing parameters for mixing the micelle solution with the fly ash and the nanoparticle additive are: first, slow mixing for 2 minutes, then fast mixing for 2 minutes.

7. A high-airtightness geopolymer cured product prepared by a method according to any one of claims 1 to 6.

8. The application of a high airtightness geopolymer solidified material prepared by the method according to any one of claims 1 to 6 in construction engineering.

9. The application of a high-airtightness geopolymer solidified material prepared by the method for preparing a high-airtightness geopolymer solidified material according to any one of claims 1 to 6 in well completion or cementing.

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