An organic base-activated geopolymer cured product, a method for preparing the same, and applications thereof

Abstract

The application discloses an organic alkali-activated geopolymer solidified product, a preparation method and application thereof, and relates to the field of geopolymer solidified products.The method comprises the following steps: adding water glass, a surfactant and a defoaming agent into water, uniformly stirring and heating to obtain a micelle solution, and cooling to room temperature for standby use; wherein the water glass accounts for 10-40.33% of the weight percentage of water, the surfactant accounts for 1-7.14% of the weight percentage of water, and the defoaming agent accounts for 0.17-1% of the weight percentage of water; adding an organic alkali into the micelle solution, uniformly mixing to obtain a mixed solution; wherein the organic alkali accounts for 1.83-11.67% of the weight percentage of water; according to the water-glass ratio of 0.3-0.35, fly ash is weighed and poured into a stirring pot of a cement mortar stirrer, the mixed solution is poured into the stirring pot and stirred and mixed to prepare the organic alkali-activated geopolymer solidified product. Not only the "frosting" phenomenon is avoided, but also the compressive strength performance of the organic alkali-activated geopolymer solidified product is significantly improved, which has very great practical significance for widening the application field of geopolymer.

Description

Technical Field

[0001] This invention relates to the field of geopolymer-based materials technology, and in particular to an organic base-activated 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.

[0003] The most common method for preparing geopolymers is to use alkaline solution activation. However, since this method uses a high concentration of alkaline solution to dissolve the raw materials, there will inevitably be an excessive amount of alkaline residue after the solid raw materials are mixed with the alkaline activator solution and the geopolymerization reaction occurs. Summary of the Invention

[0004] To eliminate the "frost" phenomenon in geopolymer solidified products during use, thereby improving the mechanical strength and stability of geopolymer solidified products, and at the same time enriching technical routes and increasing the selection space, this invention provides an organic base activated geopolymer solidified product, its preparation method, and its application.

[0005] In a first aspect, embodiments of the present invention provide a method for preparing an organic base-activated polymer solidified product, which may include:

[0006] Water glass, surfactant, and defoamer are added to water, heated and stirred until homogeneous to obtain a micelle solution, which is then cooled to room temperature for later use; wherein the water glass accounts for 10-40.33% of the weight of the water, the surfactant accounts for 1-7.14% of the weight of the water, and the defoamer accounts for 0.17-1% of the weight of the water;

[0007] An organic base is added to the micelle solution and mixed evenly to obtain a mixed solution; wherein the organic base accounts for 1.83 to 11.67% of the weight of the water.

[0008] Weigh the fly ash according to the water-to-binder ratio of 0.3 to 0.35, pour the fly ash into the mixing pot of a cement mortar mixer, pour the mixed solution into the mixing pot and stir to prepare an organic alkali-activated geopolymer solidified product.

[0009] In one embodiment, the water glass accounts for 34.57–40.33% of the weight of the water, the surfactant accounts for 1–2% of the weight of the water, the defoamer accounts for 0.29–1% of the weight of the water, and the organic alkali accounts for 3–11.42% or 11.67–20% of the weight of the water.

[0010] In another embodiment, the surfactant accounts for 1.71-2% of the weight of the water, the defoamer accounts for 0.29-0.5% of the weight of the water, and the organic base accounts for 8.57-10% of the weight of the water.

[0011] In another embodiment, the surfactant is at least one of the following: lignin sulfonates, naphthalenes, melamines, aminosulfonates, fatty acids, and polycarboxylates.

[0012] In another embodiment, the defoamer is at least one of the following: oils, alcohols, synthetic fatty acids and fatty acid esters, amides, phosphate esters, organosilicon compounds, halogenated organic compounds, polyethers and polyether-type nonionic surfactants.

[0013] In another embodiment, the organic base is an amine compound, including at least one of the following: aliphatic amines, alcoholic amines, amides, alicyclic amines, aromatic amines, and naphthyl amines.

[0014] In another embodiment, the modulus of the water glass is 3.3.

[0015] Secondly, embodiments of the present invention provide an organic base activated geopolymer cured product prepared according to the method for preparing organic base activated geopolymer cured products described in the first aspect.

[0016] Thirdly, embodiments of the present invention provide an application of an organic base activated geopolymer solidified product prepared according to the method for preparing organic base activated geopolymer solidified products described in the first aspect in construction engineering.

[0017] Fourthly, embodiments of the present invention provide an application of an organic base activated geopolymer solidified material prepared according to the method for preparing organic base activated geopolymer solidified material according to the first aspect in well completion or cementing.

[0018] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0019] This invention provides an organic alkali-activated geopolymer solidified product, its preparation method, and its application. The organic alkali-activated geopolymer solidified product prepared by this method exhibits enhanced synergistic effects among its components. By adding organic alkali, the modulus of water glass is adjusted, delaying the initial hydration reaction and extending the initial setting time, thus preventing shrinkage and cracking. This results in a geopolymer with low porosity and high density, not only preventing "frost" but also significantly improving the compressive strength of the organic alkali-activated geopolymer solidified product. This has significant practical implications for broadening the application fields of geopolymers.

[0020] 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.

[0021] 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

[0022] 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:

[0023] Figure 1 This is a flowchart of a method for preparing organic base-activated geopolymer solids provided in an embodiment of the present invention. Detailed Implementation

[0024] 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.

[0025] The inventors discovered that during the later stages of geopolymer use, residual alkali metal ions gradually migrate to the surface through internal pores and crystallize, forming a white, frosty substance, commonly known as "frost." This phenomenon affects the later-stage properties of the geopolymer, causing the gel structure to become loose and porous, thus reducing the performance of the sample. Therefore, developing a preparation method that can eliminate the frost phenomenon in geopolymers and impart good mechanical strength and stability is of great practical significance for broadening the application fields of geopolymers. In view of the above problems, this invention is proposed to provide an organic base-activated geopolymer solidified product, its preparation method, and its application, which overcomes or at least partially solves the above problems.

[0026] This invention provides a method for preparing organic base-activated geopolymer solids, referring to... Figure 1 As shown, the method may include the following steps:

[0027] Step S11: Add water glass, surfactant and defoamer to water, heat and stir until homogeneous to obtain micelle solution, and then cool to room temperature for later use; wherein, the weight percentage of water glass in water is 10-40.33%, the weight percentage of surfactant in water is 1-7.14%, and the weight percentage of defoamer in water is 0.17-1%.

[0028] In this step, water glass is added to the water to dissolve it. The surfactant is at least one of the following: lignin sulfonates, naphthalenes, melamines, aminosulfonates, fatty acids, and polycarboxylates. The surfactant is added to make the fly ash and water mix more evenly. The defoamer is at least one of the following: oils, alcohols, synthetic fatty acids and fatty acid esters, amides, phosphate esters, organosilicon compounds, halogenated organic compounds, polyethers and polyether-type nonionic surfactants. The defoamer is added to reduce the amount of foaming caused by the surfactant during stirring and dissolution.

[0029] Step S12: Add the organic base to the micelle solution and mix thoroughly to obtain a mixed solution; wherein the organic base accounts for 1.83 to 11.67% of the weight of water.

[0030] It should be noted in this step that the organic base is an amine compound, including at least one of the following: aliphatic amines, alcoholic amines, amides, alicyclic amines, aromatic amines, and naphthyl amines. In this embodiment of the invention, the organic base is preferably one of aliphatic amines, alcoholic amines, or aromatic amines, and its main function is to provide OH- to the system, increasing the pH value. Because the organic base has a certain degree of volatility, in this embodiment of the invention, to prevent significant pH changes, mixing and storage under sealed conditions are necessary.

[0031] Step S13: Weigh fly ash according to a water-to-binder ratio of 0.3 to 0.35, pour the fly ash into the mixing pot of the cement mortar mixer, pour the mixed solution into the mixing pot and stir to prepare an organic alkali-activated geopolymer solidified product.

[0032] The method for preparing organic base-activated geopolymer solidified products provided in this embodiment of the invention further enhances the synergistic effect among the various components of the geopolymer. By adding organic base, the modulus of water glass is adjusted, the early hydration reaction is delayed, the early setting time is extended, and the phenomena of drying shrinkage and cracking are avoided, forming a geopolymer with low porosity and high density. This not only avoids the occurrence of "frost" phenomenon, but also significantly improves the compressive strength of the organic base-activated geopolymer solidified product, which has great practical significance for broadening the application fields of geopolymers.

[0033] In a preferred embodiment, the water glass accounts for 34.57–40.33% of the weight of the water, the surfactant accounts for 1–2% of the weight of the water, the defoamer accounts for 0.29–1% of the weight of the water, and the organic alkali accounts for 3–11.42% or 11.67–20% of the weight of the water.

[0034] In this embodiment of the invention, by adjusting the various components of the geopolymer, the synergistic effect between the components is enhanced. Without affecting the mechanical strength and stability, not only is the "frost" phenomenon avoided, but the compressive strength of the organic alkali-activated geopolymer curing material is also significantly improved.

[0035] In another more preferred embodiment, the surfactant accounts for 1.71 to 2% of the weight of the water, the defoamer accounts for 0.29 to 0.5% of the weight of the water, and the organic base accounts for 8.57 to 10% of the weight of the water.

[0036] In this embodiment of the invention, the synergistic effect among the various components of the geopolymer is further enhanced. By adding organic base, the modulus of water glass is adjusted, the early hydration reaction is delayed, the early setting time is extended, and the phenomena of drying shrinkage and cracking are avoided, forming a geopolymer with low porosity and high density. This not only avoids the occurrence of "frost" phenomenon, but also significantly improves the compressive strength of the organic base-activated geopolymer solidified product, which has great practical significance for broadening the application fields of geopolymer.

[0037] Based on the above preparation method, the following examples and comparative examples are provided in this invention to verify the "blooming" phenomenon and compressive strength effect of the organic base-activated geopolymer cured products prepared in this invention:

[0038] The water glass used in Examples 1 to 6 and Comparative Examples 1 to 6 of this invention is also known as powdered fast-dissolving sodium silicate, with a modulus of 3.3 and a structural formula of (NaOH). x (Na2SiO3) y • ZH₂O, CAS No. 13870-30-9, the specific mass ratio of each component is as follows: SiO₂ content 58.32%, Na₂O content 20.74%. The commercial sources of some raw materials and reagents in the embodiments of this invention are as follows:

[0039] Raw material name Commercial Source Polyether modified silicone oil Qingdao Meiside Organosilicon Co., Ltd. Polysiloxane DC-200 Jiangsu Bosite Chemical Technology Co., Ltd. Polyethylene glycol 200 Shanghai Aladdin Biochemical Technology Co., Ltd. Octyl alcohol Shanghai Aladdin Biochemical Technology Co., Ltd. 2-Naphthalenesulfonic acid Shanghai Aladdin Biochemical Technology Co., Ltd.

[0040] It should also be noted that the other reagent raw materials involved in the embodiments and comparative examples of this invention are all commercially available general reagent products.

[0041] Example 1

[0042] In this embodiment, the organic alkali-activated geopolymer solidified product was prepared from fly ash, water glass (modulus 3.3), sodium lignosulfonate, polydimethylsiloxane, and diethylenetriamine.

[0043] Weigh 121g of water glass and add it to 300g of water. Then add 6g of sodium lignosulfonate and 1.5g of polydimethylsiloxane. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 30g of diethylenetriamine to the micelle solution and stir for 30min to obtain a homogeneous mixed solution. Seal and let stand for 24 hours before use.

[0044] Weigh 1 kg 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 above-mentioned mixed 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 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for any "frost" phenomenon and test their compressive strength.

[0045] As a control group for Example 1, Comparative Example 1 performed the following tests:

[0046] Weigh 121g of water glass and add it to 300g of water. Then add 6g of sodium lignosulfonate and 1.5g of polydimethylsiloxane. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 23.3g of NaOH to the above solution and stir for 30 minutes to obtain a homogeneous mixed solution. Seal and let stand for 24 hours before use.

[0047] Weigh 1 kg of fly ash and pour it into the mixing bowl of a cement mortar mixer. Add the above-mentioned mixed 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 for curing at 90% humidity and 30 degrees Celsius. Curing times are 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their compressive strength.

[0048] Table 1. Results of "frost" phenomenon and compressive strength verification of the cured products prepared in Example 1.

[0049] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.3 14 none 17.6 28 none 25.3 56 none 37.2 63 none 40.3

[0050] Table 2 shows the "frost" phenomenon and compressive strength verification results of the cured products prepared in Comparative Example 1.

[0051] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.5 14 Appear 16.9 28 have 23.1 56 have 33.3 63 have 35.6

[0052] Example 2

[0053] In this embodiment, the organic base activated geopolymer solidified product was prepared from fly ash, water glass (modulus 3.3), OP-15 (alkylphenol polyoxyethylene (15) ether, or alkylphenol polyoxyethylene ether-15), polyether modified silicone oil, and acetanilide.

[0054] Weigh 100g of water glass and add it to 350g of water. Then add 25g of OP-15 and 3.5g of polyether modified silicone oil. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 70g of acetanilide to the micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0055] Weigh 1 kg of fly ash according to a water-cement ratio of 0.35, pour it into the mixing bowl of a cement mortar mixer, add the above 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 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their compressive strength.

[0056] As a control group for Example 2, Comparative Example 2 performed the following tests:

[0057] Weigh 150g of water glass and add it to 350g of water. Then add 15g of OP-15 and 1.5g of polyether modified silicone oil. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 25g of NaOH to the micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0058] Weigh 1 kg of fly ash and pour it into the mixing bowl of a cement mortar mixer. Add the above-mentioned mixed 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 for curing at 90% humidity and 30 degrees Celsius. Curing times are 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their strength.

[0059] Table 3. Results of "frost" phenomenon and compressive strength verification of the cured products prepared in Example 2.

[0060]

[0061]

[0062] Table 4 shows the "frost" phenomenon and compressive strength verification results of the cured products prepared in Comparative Example 2.

[0063] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.9 14 none 16.7 28 Appear 24.9 56 have 30.3 63 have 33.6

[0064] Example 3:

[0065] In this embodiment, the organic base-activated geopolymer solidified product was prepared from fly ash, water glass (modulus 3.3), Span-80, polysiloxane, and guanidine.

[0066] Weigh 30g of water glass and add it to 300g of water. Then add 3g of Span-80 (sorbitol monooleate, CAS No.: 1338-43-8; molecular formula: C). 24 H 44 O6) and 1.5g of polysiloxane were heated to 60°C and stirred until homogeneous to obtain a micelle solution. The solution was then cooled to room temperature and set aside for later use. 9g of guanidine was added to the micelle solution and stirred for 30 minutes to obtain a homogeneous mixed solution. The solution was then left to stand for 24 hours before use.

[0067] Weigh 1 kg of fly ash according to a water-cement ratio of 0.30, pour it into the mixing bowl of a cement mortar mixer, add the above-mentioned mixed 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 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for any "frost" phenomenon and test their strength.

[0068] As a control group for Example 3, Comparative Example 3 performed the following tests:

[0069] Weigh 30g of water glass and add it to 300g of water. Then add 3g of Span-80 and 1.5g of polysiloxane. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 5.5g of NaOH to the micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0070] Weigh 1 kg of fly ash and pour it into the mixing bowl of a cement mortar mixer. Add the above-mentioned mixed 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 for curing at 90% humidity and 30 degrees Celsius. Curing times are 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their strength.

[0071] Table 5. Results of "frost" phenomenon and compressive strength verification of the cured products prepared in Example 3.

[0072] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 4.1 14 none 22.3 28 none 35.9 56 none 40.9 63 none 40.9

[0073] Table 6 shows the "frost" phenomenon and compressive strength verification results of the cured products prepared in Comparative Example 3.

[0074] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.0 14 none 17.6 28 Appear 21.9 56 have 27.3 63 have 33.6

[0075] Example 4:

[0076] In this embodiment, the organic alkali-activated geopolymer solidified product was prepared from fly ash, water glass (modulus 3.3), calcium lignosulfonate, polyethylene glycol, and tetraethylenepentamine.

[0077] Weigh 121g of water glass and add it to 350g of water. Then add 6g of calcium lignosulfonate and 1g of polyethylene glycol. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 30g of tetraethylenepentamine to the micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0078] Weigh 1 kg of fly ash according to a water-cement ratio of 0.35, pour it into the mixing bowl of a cement mortar mixer, add the above-mentioned mixed 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 7 days, 14 days, 28 days, 56 days, and 63 days. Remove samples to observe for "frost" and test their strength.

[0079] As a control group for Example 4, Comparative Example 4 performed the following tests:

[0080] Weigh 121g of water glass and add it to 350g of water. Then add 6g of calcium lignosulfonate and 1g of polyethylene glycol. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 23g of NaOH to the micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0081] Weigh 1 kg of fly ash and pour it into the mixing bowl of a cement mortar mixer. Add the above-mentioned mixed 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 for curing at 90% humidity and 30 degrees Celsius. Curing times are 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their strength.

[0082] Table 7. Results of "frost" phenomenon and compressive strength verification of the cured products prepared in Example 4.

[0083] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.5 14 none 18.2 28 none 27 56 none 40 63 none 40.7

[0084] Table 8 shows the "frost" phenomenon and compressive strength verification results of the cured products prepared in Comparative Example 4.

[0085]

[0086]

[0087] Example 5:

[0088] In this embodiment, the organic base-activated geopolymer solidified product was prepared from fly ash, water glass (modulus 3.3), tetramethylacetyl octahydronaphthalene, isooctyl phosphate, and triethanolamine.

[0089] Weigh 95g of water glass and add it to 300g of water. Then add 7g of tetramethylacetyl octahydrogen and 0.5g of isooctyl phosphate. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 35g of triethanolamine to the above micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0090] Weigh 1 kg of fly ash according to a water-cement ratio of 0.30, pour it into the mixing bowl of a cement mortar mixer, add the above-mentioned mixed 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 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for any "frost" phenomenon and test their strength.

[0091] As a control group for Example 5, Comparative Example 5 performed the following tests:

[0092] Weigh 95g of water glass and add it to 300g of water. Then add 7g of tetramethylacetyl octahydrogen and 0.5g of isooctanol phosphate. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 25g of NaOH to the above micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0093] Weigh 1 kg of fly ash and pour it into the mixing bowl of a cement mortar mixer. Add the above-mentioned mixed 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 for curing at 90% humidity and 30 degrees Celsius. Curing times are 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their strength.

[0094] Table 9 shows the results of the "frost" phenomenon and compressive strength verification of the cured products prepared in Example 5.

[0095] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 4 14 none 15.7 28 none 23 56 none 31.2 63 none 35.6

[0096] Table 10 shows the "frost" phenomenon and compressive strength verification results of the cured products prepared in Comparative Example 5.

[0097] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.2 14 Appear 17 28 have 20.1 56 have 27.9 63 have 30.3

[0098] Example 6:

[0099] In Example 6, the organic base-activated geopolymer solidified product was prepared from fly ash, water glass (modulus 3.3), 2-naphthalenesulfonic acid, n-octanol, and isopropanolamine.

[0100] Weigh 97g of water glass and add it to 350g of water. Then add 10g of 2-naphthalenesulfonic acid and 1g of n-octanol. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 40g of isopropanolamine to the above micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0101] Weigh 1 kg of fly ash according to a water-cement ratio of 0.30, pour it into the mixing bowl of a cement mortar mixer, add the above-mentioned mixed 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 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for any "frost" phenomenon and test their strength.

[0102] As a control group for Example 6, Comparative Example 6 performed the following tests:

[0103] Weigh 97g of water glass and add it to 350g of water. Then add 10g of 2-naphthalenesulfonic acid and 1g of n-octanol. Heat to 60℃ and stir until homogeneous to obtain a micelle solution. Cool to room temperature and set aside. Add 27g of NaOH to the above micelle solution and stir for 30 minutes to obtain a homogeneous mixed solution. Let stand for 24 hours before use.

[0104] Weigh 1 kg of fly ash and pour it into the mixing bowl of a cement mortar mixer. Add the above-mentioned mixed 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 for curing at 90% humidity and 30 degrees Celsius. Curing times are 7 days, 14 days, 28 days, 56 days, and 63 days. Remove the samples to observe for "frost" and test their strength.

[0105] Table 11. Verification results of "frost" phenomenon and compressive strength of the cured products prepared in Example 6.

[0106] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 4.3 14 none 16.2 28 none 23.7 56 none 33.3 63 none 37.6

[0107] Table 12 shows the "frost" phenomenon and compressive strength verification results of the cured products prepared in Comparative Example 6.

[0108] Maintenance time / day Is there a "frost" phenomenon? Compressive strength / MPa 7 none 5.1 14 Appear 16.7 28 have 21.3 56 have 26.9 63 have 31.2

[0109] Referring to Examples 1 to 6 above, and Comparative Examples 1 to 6, the present invention verified the "blooming" phenomenon and compressive strength of the prepared organic alkali-activated geopolymer and the geopolymer solidified products prepared in the comparative examples. It was found that the addition of organic alkali significantly solved the occurrence of the geopolymer "blooming" phenomenon, solving the technical problem of "blooming" caused by residual alkaline substances in the existing preparation method using (inorganic) alkaline solution as raw material. At the same time, by adjusting the components, it was found that when the surfactant accounted for 1.71-2% of the weight of water, the defoamer accounted for 0.29-0.5% of the weight of water, and the organic alkali accounted for 8.57-10% of the weight of water, the synergistic effect among the components in the geopolymer was further enhanced. That is, Examples 1 and 4 are the optimal examples, which not only have high compressive strength in a short time, but also have the most stable compressive strength in a long time. That is, the compressive strength is significantly improved without blooming.

[0110] Based on the same inventive concept, this embodiment of the invention provides an organic base activated geopolymer solidified product prepared according to the above-described method for preparing organic base activated geopolymer solidified products.

[0111] Based on the same inventive concept, this embodiment of the invention provides an application of an organic base activated geopolymer solidified product prepared according to the above-described method for preparing organic base activated geopolymer solidified products in construction engineering.

[0112] Based on the same inventive concept, this embodiment of the invention provides an application of an organic base activated geopolymer solidified material prepared according to the above-described method for preparing organic base activated geopolymer solidified material in well completion or cementing.

[0113] 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 an organic base-activated geopolymer solidified product, characterized in that, include: Water glass, surfactant, and defoamer are added to water, heated and stirred until homogeneous to obtain a micelle solution, which is then cooled to room temperature for later use; wherein the water glass accounts for 10-40.33% of the weight of the water, the surfactant accounts for 1-7.14% of the weight of the water, and the defoamer accounts for 0.17-1% of the weight of the water; An organic base is added to the micelle solution and mixed thoroughly to obtain a mixed solution; wherein the organic base accounts for 1.83~11.67% of the weight of the water; Weigh the fly ash according to the water-to-binder ratio of 0.3 to 0.35, pour the fly ash into the mixing pot of a cement mortar mixer, pour the mixed solution into the mixing pot and stir to prepare an organic alkali-activated geopolymer solidified product.

2. The method according to claim 1, characterized in that, The water glass accounts for 34.57~40.33% of the weight of the water, the surfactant accounts for 1~2% of the weight of the water, the defoamer accounts for 0.29~1% of the weight of the water, and the organic alkali accounts for 3~11.42% of the weight of the water.

3. The method according to claim 2, characterized in that, The surfactant accounts for 1.71-2% of the weight of the water, the defoamer accounts for 0.29-0.5% of the weight of the water, and the organic base accounts for 8.57-10% of the weight of the water.

4. The method according to any one of claims 1 to 3, characterized in that, The surfactant is at least one of the following: lignin sulfonates, naphthalenes, melamines, aminosulfonates, fatty acids, or polycarboxylates.

5. The method according to any one of claims 1 to 3, characterized in that, The defoamer is at least one of the following: oils, alcohols, synthetic fatty acids and fatty acid esters, amides, phosphate esters, organosilicon compounds, halogenated organic compounds, polyethers and polyether-type nonionic surfactants.

6. The method according to any one of claims 1 to 3, characterized in that, The organic base is an amine compound, including at least one of the following: aliphatic amines, alcoholic amines, amides, alicyclic amines, aromatic amines, and naphthyl amines.

7. The method according to any one of claims 1 to 3, characterized in that, The modulus of the water glass is 3.

3.

8. An organic base activated geopolymer solidified product prepared by the method for preparing organic base activated geopolymer solidified products according to any one of claims 1 to 7.

9. The application of an organic base activated geopolymer solidified product prepared by the method described in any one of claims 1 to 7 in construction engineering.

10. The application of an organic base activated geopolymer solidified product prepared by any one of claims 1 to 7 in well completion or cementing.

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