Corrosion-resistant pk plate and preparation method thereof

Abstract

The application relates to the field of concrete, and particularly discloses a corrosion-resistant PK plate and a preparation method thereof. The corrosion-resistant PK plate comprises the following raw materials in parts by weight: polymer modified cement 50-60 parts, corrosion-resistant fiber mesh cloth 20-30 parts, aggregate 30-45 parts, gypsum 5-8 parts, fly ash 5-10 parts, water reducing agent 0.5-0.7 parts, defoaming agent 0.1-0.2 parts and water 20-25 parts; the polymer modified cement comprises modified ceramic powder and Portland cement in a mass ratio of 2-3:10-12. The application improves the compressive strength, crack resistance and corrosion resistance of the PK plate.

Description

Technical Field

[0001] This application relates to the field of concrete, and more specifically, to a corrosion-resistant PK board and a method for preparing the same. Background Technology

[0002] Concrete is an artificial stone material made by mixing cementitious materials, aggregates, water, chemical admixtures, and mineral admixtures in a certain proportion, followed by stirring, molding, curing, and hardening. Currently, the industry mainly improves the durability of concrete by adding admixtures, using high-performance cementitious materials, or surface coatings. However, these methods are difficult to implement in confined spaces and struggle to simultaneously achieve comprehensive performance characteristics such as strength, crack resistance, and corrosion resistance.

[0003] Therefore, there is an urgent need to provide a corrosion-resistant PK prestressed concrete composite slab (PK slab) that not only has excellent compressive strength, crack resistance and corrosion resistance, but also eliminates the need for on-site mixing, pouring and other construction operations. Summary of the Invention

[0004] To improve the compressive strength, crack resistance and corrosion resistance of PK plates, this application provides a corrosion-resistant PK plate and its preparation method.

[0005] Firstly, this application provides a corrosion-resistant PK plate, which adopts the following technical solution: A corrosion-resistant PK board comprises the following raw materials in parts by weight: 50-60 parts polymer-modified cement, 20-30 parts corrosion-resistant fiber mesh, 30-45 parts aggregate, 5-8 parts gypsum, 5-10 parts fly ash, 0.5-0.7 parts water-reducing agent, 0.1-0.2 parts defoamer, and 20-25 parts water; wherein the polymer-modified cement comprises modified ceramic powder and silicate cement in a mass ratio of 2-3:10-12.

[0006] By adopting the above technical solutions, modified silicate cement is modified with modified ceramic powder, which increases the compressive strength of the cement. The flexible polymer shell on the surface of the modified ceramic powder prevents the rapid propagation of internal cracks in the cement, avoiding the entry of corrosive media into the cement composite and improving crack resistance and corrosion resistance. By modifying the corrosion-resistant fiber mesh with epoxy resin, the epoxy resin and polymer-modified cement matrix have high bonding strength, which enables stress to be effectively transferred from the cement matrix to the high-strength glass fiber, increasing the overall crack resistance and corrosion resistance of the cement composite. In addition, the glass mesh forms a uniform support system inside the cement, which can prevent microcracks from propagating into fine cracks, further enhancing the crack resistance and corrosion resistance of the cement.

[0007] Optionally, the preparation method of the modified ceramic powder includes the following steps: (1) Ceramic particles are crushed and ground, ultrasonically treated with dilute hydrochloric acid, washed, dried, and silane coupling agent solution is added. The pH value is adjusted to 4-5 and stirred at 50-60℃ for 1-2 hours to obtain pretreated ceramic powder. (2) Add the pretreated ceramic powder to DMF, add trithiocarbonate, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide, stir for 10-12 h, wash and dry to obtain ceramic composite. (3) The ceramic composite was added to THF, ultrasonically dispersed, and then azobisisobutyronitrile, styrene, and isoprene were added. The mixture was degassed by freeze-thaw cycle, sealed, heated at 65-70℃ for 10-12 hours, washed, and dried to obtain modified ceramic powder.

[0008] By adopting the above technical solution, the modified ceramic powder is uniformly dispersed in the cement slurry during the cement hydration process. The polymer shell grafted on the surface of the ceramic powder can effectively fill the micropores and defects in the interface transition zone between cement and aggregate during cement hydration, making the regional structure more compact. Moreover, the chain ends or chain structure of the polymer shell undergo hydrolysis or oxidation, generating active groups such as carboxyl and mercapto groups in situ. These active groups can form chemical bonds or strong physical adsorption with hydration products, significantly improving the efficiency of stress transmission from the cement matrix to the high-rigidity ceramic particles, reducing stress concentration at the interface, and improving compressive strength. When microcracks propagate in the cement matrix and encounter the modified ceramic powder, its flexible polymer shell can absorb and dissipate fracture energy through large deformation, effectively bridging the crack, blunting the crack tip, preventing the rapid propagation of the crack, and preventing corrosive media (water, chloride ions, oxygen, etc.) from entering the cement composite through the crack, thus greatly improving crack resistance and corrosion resistance.

[0009] Optionally, the method for preparing the corrosion-resistant fiber mesh includes the following steps: (1) Immerse the alkali-resistant glass fiber mesh in an ethanol-water solution containing a silane coupling agent and dry it to obtain an activated glass fiber mesh. (2) The activated glass fiber mesh was immersed in a vinyl ester resin modified acrylic resin emulsion to obtain a pretreated glass fiber mesh. (3) The pretreated glass fiber mesh is immersed in epoxy resin emulsion and dried to obtain corrosion resistant fiber mesh.

[0010] Optionally, the preparation method of the vinyl ester resin modified acrylic resin emulsion includes the following steps: (1) Sodium dodecylbenzenesulfonate and octylphenol polyoxyethylene ether were added to water and stirred until completely dissolved to obtain an aqueous phase; (2) Methyl methacrylate, butyl acrylate, acrylic acid and vinyl ester resin are stirred evenly to obtain an oil phase; (3) Under an inert gas atmosphere, the oil phase is slowly added dropwise to the aqueous phase, and the mixture is stirred at high speed and heated to 75-80℃ to obtain a pre-emulsion. Ammonium persulfate is added to the pre-emulsion with a mass fraction of 30%, and the mixture is kept at a constant temperature for 30-50 min to obtain a mixed solution. The pre-emulsion with a mass fraction of 70% and ammonium persulfate are slowly added dropwise to the mixed solution, and the mixture is kept at a constant temperature for 1-2 h. The mixture is then cooled to 35-40℃, and triethylamine is slowly added dropwise during the stirring process. The pH value is adjusted to 7-8, and an organosilicon defoamer is added. The mixture is stirred for 15-30 min to obtain a vinyl ester resin modified acrylic resin emulsion.

[0011] Optionally, the mass ratio of methyl methacrylate, butyl acrylate, acrylic acid, and vinyl ester resin is 45-50:40-43:4-6:9-10.

[0012] By adopting the above technical solution, the alkali-resistant glass fiber mesh is activated by a silane coupling agent, introducing organic functional groups on its surface and gaining reactivity. Vinyl ester resin modified acrylic resin serves as a flexible intermediate layer, with one end firmly bonded to the activated fiber surface via Si-OC; the carboxyl and hydroxyl groups at the other end can form a strong interaction with the outer epoxy resin, constructing a stable interfacial transition layer that absorbs and disperses stress, preventing fiber breakage and deformation. In addition, the outermost epoxy resin is tightly bonded to the polymer-modified cement matrix, enabling effective stress transfer from the cement matrix to the high-strength glass fiber, thereby significantly improving the overall crack resistance and corrosion resistance of the concrete.

[0013] Optionally, the aggregate is 5-20mm continuously graded basalt crushed stone.

[0014] Optionally, the water-reducing agent is a polycarboxylate-based high-performance water-reducing agent.

[0015] Optionally, the defoamer is an organosilicon powder defoamer.

[0016] Secondly, this application provides a method for preparing a corrosion-resistant PK plate, which adopts the following technical solution: A method for preparing a corrosion-resistant PK plate includes the following steps: Polymer-modified cement, aggregate, gypsum, fly ash, water-reducing agent, and defoamer are added to water and mixed evenly to obtain a mixed slurry. Corrosion-resistant fiber mesh is laid in a mold, the mixed slurry is injected, vibrated and compacted, and cured to obtain a corrosion-resistant PK board.

[0017] In summary, this application has the following beneficial effects: 1. This application preferably uses polymer-modified cement as a gel material to improve the compressive strength and crack resistance of the cement composite; by adding corrosion-resistant fiber mesh, it forms a uniform support system inside the cement composite, preventing the propagation of cement-based cracks and further improving its corrosion resistance; the combination of polymer-modified cement and corrosion-resistant fiber mesh improves the compressive strength, crack resistance and corrosion resistance of the cement composite.

[0018] 2. This application uses modified ceramic powder to modify cement. The polymer shell layer on the surface of the modified ceramic powder can effectively fill the micropores and defects in the interface transition zone between cement and aggregate, and effectively absorb fracture energy, prevent rapid crack propagation, and further increase the crack resistance and corrosion resistance of the cement composite.

[0019] 3. This application uses vinyl ester resin modified acrylic resin as a flexible intermediate layer to connect alkali-resistant glass fiber mesh and epoxy resin, which increases the crack resistance of glass fiber. The epoxy resin is tightly bonded to the polymer-modified cement matrix, so that stress can be effectively transferred from the cement matrix to the high-strength glass fiber, thereby improving the crack resistance and corrosion resistance of concrete. Detailed Implementation

[0020] The following embodiments provide a further detailed description of this application.

[0021] Example of preparation of polymer-modified cement

[0022] The ceramic granules were purchased from Lingshou County Zekai Mineral Products Co., Ltd., product number 8-16; the silane coupling agent was purchased from Nanjing Liangui Chemical Co., Ltd., model KH550; the trithiocarbonate was purchased from Tianmen Hengchang Chemical Co., Ltd.; and the silicate cement was purchased from Huaxin Cement Co., Ltd., model P·LH42.5.

[0023] Preparation Example 1 (1) 100g of ceramic particles were crushed and ground, ultrasonically treated with 200g of 5% hydrochloric acid for 10min, washed with water, dried at 60℃ for 8h, added to 40g of ethanol aqueous solution containing 1g of silane coupling agent (ethanol mass fraction of 80%), pH value adjusted to 4, stirred at 60℃ for 1h to obtain pretreated ceramic powder. (2) Add the pretreated ceramic powder obtained in step (1) to 300g DMF, stir evenly, add 5g trithiocarbonate, 2g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 1g N-hydroxysuccinimide, stir for 12h, wash with water, dry at 60℃ for 8h to obtain ceramic composite. (3) The ceramic composite obtained in step (2) was added to 500g THF, ultrasonically dispersed for 40min, 0.3g azobisisobutyronitrile, 22g styrene and 10g isoprene were added, the mixture was degassed by freeze-thaw cycle, sealed and heated at 65℃ for 10h, washed with water and dried at 60℃ for 10h to obtain modified ceramic powder. (4) Mix 12g of silicate cement and 3g of modified ceramic powder obtained in step (3) evenly to obtain polymer modified cement.

[0024] Preparation Example 2 (1) 100g of ceramic particles were crushed and ground, ultrasonically treated with 200g of 5% hydrochloric acid for 10min, washed with water, dried at 60℃ for 8h, added to 40g of ethanol aqueous solution containing 1g of silane coupling agent (ethanol mass fraction of 80%), pH value adjusted to 5, stirred at 50℃ for 2h to obtain pretreated ceramic powder. (2) Add the pretreated ceramic powder obtained in step (1) to 300g DMF, stir evenly, add 7g trithiocarbonate, 3g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 1g N-hydroxysuccinimide, stir for 10h, wash with water, dry at 60℃ for 4h to obtain ceramic composite. (3) The ceramic composite obtained in step (2) was added to 500g THF, ultrasonically dispersed for 40min, 0.5g azobisisobutyronitrile, 25g styrene and 12g isoprene were added, freeze-thaw degassing cycle was performed, sealed and heated at 70℃ for 12h, washed with water and dried at 70℃ for 5h to obtain modified ceramic powder. (4) Mix 10g of silicate cement and 2g of modified ceramic powder obtained in step (3) evenly to obtain polymer modified cement.

[0025] Preparation Example 3 The difference from Preparation Example 1 is that the modified ceramic powder is replaced by an equal amount of pretreated ceramic powder. The specific preparation method of the pretreated ceramic powder is as follows: 100g of ceramic particles are crushed and ground, ultrasonically treated with 200g of 5% hydrochloric acid for 10min, washed with water, dried at 60℃ for 8h, added to 40g of ethanol aqueous solution containing 1g of silane coupling agent (ethanol mass fraction of 80%), the pH value is adjusted to 4, and stirred at 60℃ for 1h to obtain the pretreated ceramic powder.

[0026] Preparation example of corrosion-resistant fiber mesh cloth

[0027] Silane coupling agent was purchased from Nanjing Liangui Chemical Co., Ltd., model KH550; alkali-resistant glass fiber mesh was purchased from Luoyang Senhui Glass Fiber Co., Ltd., model 01; methyl methacrylate was purchased from Shandong Ruiqi Chemical Co., Ltd., model mma-1; butyl acrylate was purchased from Shandong Hongyang Chemical Co., Ltd., CAS number 141-32-2; vinyl ester resin was purchased from Jinan Jingsheng Chemical Co., Ltd., model TMR-158#; epoxy resin emulsion was purchased from Shenyang Baichen Chemical Technology Co., Ltd., model K-051; organosilicon solid powder defoamer was purchased from Hefei Yueguan New Materials Co., Ltd., model DE-1185.

[0028] Preparation Example 1 (1) 100g of alkali-resistant glass fiber mesh was immersed in 200g of an ethanol aqueous solution containing 2g of silane coupling agent (ethanol mass fraction was 70%) and dried at 80℃ to obtain activated glass fiber mesh. (2) Add 1g sodium dodecylbenzenesulfonate and 1g octylphenol polyoxyethylene ether to 200g water and stir until completely dissolved to obtain an aqueous phase; add 50g methyl methacrylate, 43g butyl acrylate, 6g acrylic acid and 9g vinyl ester resin and stir evenly to obtain an oil phase; under a nitrogen atmosphere, slowly add the oil phase to the aqueous phase, stir evenly with high-speed shearing, heat to 75℃ to obtain a pre-emulsion, add 0.2g ammonium persulfate to the pre-emulsion with a mass fraction of 30%, keep warm for 50min to obtain a mixed solution, slowly add the pre-emulsion with a mass fraction of 70% and 0.45g ammonium persulfate to the mixed solution, keep warm for 1h, cool to 40℃, slowly add 2.5g triethylamine during stirring, adjust the pH value to 7, add 0.2g organosilicon defoamer, stir for 30min to obtain a vinyl ester resin modified acrylic resin emulsion; (3) Immerse the activated glass fiber mesh obtained in step (1) into the vinyl ester resin modified acrylic resin emulsion obtained in step (2) to obtain a pretreated glass fiber mesh. (4) The pretreated glass fiber mesh obtained in step (3) is immersed in epoxy resin emulsion and dried at 70°C to obtain corrosion resistant fiber mesh.

[0029] Preparation Example 2 (1) 100g of alkali-resistant glass fiber mesh was immersed in 200g of an ethanol aqueous solution containing 2g of silane coupling agent (ethanol mass fraction was 70%) and dried at 80℃ to obtain activated glass fiber mesh. (2) Add 1g sodium dodecylbenzenesulfonate and 1g octylphenol polyoxyethylene ether to 200g water and stir until completely dissolved to obtain an aqueous phase; add 45g methyl methacrylate, 40g butyl acrylate, 4g acrylic acid and 10g vinyl ester resin and stir evenly to obtain an oil phase; under a nitrogen atmosphere, slowly add the oil phase to the aqueous phase, stir evenly with high-speed shearing, heat to 80℃ to obtain a pre-emulsion, add 0.2g ammonium persulfate to the pre-emulsion with a mass fraction of 30%, keep warm for 30min to obtain a mixed solution, slowly add the pre-emulsion with a mass fraction of 70% and 0.45g ammonium persulfate to the mixed solution, keep warm for 2h, cool to 35℃, slowly add 2.5g triethylamine during stirring, adjust the pH value to 8, add 0.2g organosilicon defoamer, stir for 15min to obtain a vinyl ester resin modified acrylic resin emulsion; (3) Immerse the activated glass fiber mesh obtained in step (1) into the vinyl ester resin modified acrylic resin emulsion obtained in step (2) to obtain a pretreated glass fiber mesh. (4) The pretreated glass fiber mesh obtained in step (3) is immersed in epoxy resin emulsion and dried at 70°C to obtain corrosion resistant fiber mesh.

[0030] Preparation Example 3 The difference from Preparation Example 1 is that the vinyl ester resin-modified acrylic resin emulsion treatment was not performed. The specific preparation method is as follows: (1) 100g of alkali-resistant glass fiber mesh was immersed in 200g of an ethanol aqueous solution containing 2g of silane coupling agent (ethanol mass fraction was 70%) and dried at 80℃ to obtain activated glass fiber mesh. (2) The activated glass fiber mesh obtained in step (1) is immersed in epoxy resin emulsion and dried at 70°C to obtain corrosion resistant fiber mesh.

[0031] Example

[0032] In the following examples, gypsum was purchased from Tianmen Hengchang Chemical Co., Ltd., product number HC3462; fly ash was purchased from Wuhan Jiyesheng Chemical Co., Ltd., product number A01085; basalt crushed stone was purchased from Lingshou County Shengxiang Mineral Products Co., Ltd.; organosilicon solid powder defoamer was purchased from Hefei Yueguan New Materials Co., Ltd., model DE-1185; polycarboxylate superplasticizer was purchased from Shanxi Anrui Building Materials Co., Ltd., model 101; silicate cement was purchased from Huaxin Cement Co., Ltd., model P·LH42.5; and alkali-resistant glass fiber mesh was purchased from Luoyang Senhui Glass Fiber Co., Ltd., model 01.

[0033] Example 1: A corrosion-resistant PK board, the raw material dosage is shown in Table 1, the polymer modified cement is prepared by the method in Example 1 of polymer modified cement preparation; the corrosion-resistant fiber mesh is prepared by the method in Example 1 of corrosion-resistant fiber mesh preparation; the water-reducing agent is polycarboxylate water-reducing agent; the defoamer is organosilicon solid powder defoamer; the aggregate is 5-20mm continuously graded basalt crushed stone.

[0034] The above-mentioned method for preparing corrosion-resistant PK board includes the following steps: adding polymer-modified cement, aggregate, gypsum, fly ash, water-reducing agent and defoamer to water, mixing evenly to obtain a mixed slurry; laying corrosion-resistant fiber mesh cloth in a mold, injecting the mixed slurry, vibrating and compacting, curing, and obtaining corrosion-resistant PK board.

[0035] Table 1. Raw material consumption of corrosion-resistant PK plates prepared in Examples 1-3 Polymer modified cement 60 55 50 Corrosion-resistant fiber mesh 30 25 20 aggregate 45 40 30 plaster 8 7 5 fly ash 10 8 5 Defoamer 0.2 0.1 0.1 Water reducing agent 0.7 0.6 0.5 water 25 23 20 Example 2: A corrosion-resistant PK board, which differs from Example 1 in that the raw material amounts are as shown in Table 1; the polymer-modified cement is prepared using the method in Example 2 of polymer-modified cement preparation; the corrosion-resistant fiber mesh is prepared using the method in Example 2 of corrosion-resistant fiber mesh preparation; the water-reducing agent is a polycarboxylate water-reducing agent; the defoamer is an organosilicon solid powder defoamer; and the aggregate is 5-20mm continuously graded basalt crushed stone.

[0036] Example 3: A corrosion-resistant PK board, which differs from Example 1 in that the raw material amounts are as shown in Table 1; the polymer-modified cement is prepared using the method in Example 1 of polymer-modified cement preparation; the corrosion-resistant fiber mesh is prepared using the method in Example 2 of corrosion-resistant fiber mesh preparation; the water-reducing agent is a polycarboxylate water-reducing agent; the defoamer is an organosilicon solid powder defoamer; and the aggregate is 5-20mm continuously graded basalt crushed stone.

[0037] Example 4: A corrosion-resistant PK board, which differs from Example 1 in that the corrosion-resistant fiber mesh is prepared using the method described in Example 3 of the corrosion-resistant fiber mesh preparation.

[0038] Comparative Example

[0039] Comparative Example 1: A corrosion-resistant PK board, which differs from Example 1 in that the polymer-modified cement is prepared using the method in Example 3 of polymer-modified cement preparation.

[0040] Comparative Example 2: A corrosion-resistant PK board, which differs from Example 1 in that the corrosion-resistant fiber mesh is replaced by an equal amount of alkali-resistant glass fiber mesh.

[0041] Comparative Example 3: A corrosion-resistant PK board, which differs from Example 1 in that the polymer-modified cement is replaced by an equal amount of silicate cement.

[0042] Comparative Example 4: A corrosion-resistant PK board, which differs from Comparative Example 3 in that the corrosion-resistant fiber mesh is replaced by an equal amount of alkali-resistant glass fiber mesh.

[0043] Comparative Example 5: A corrosion-resistant PK board, which differs from Example 1 in that it does not contain corrosion-resistant fiber mesh.

[0044] Performance testing

[0045] Corrosion-resistant PK plates were prepared according to the methods in the examples and comparative examples, and their performance was tested according to the following methods. The test results are recorded in Table 2.

[0046] 1. Compressive strength, flexural strength and chloride ion penetration resistance tests shall be conducted for 28 days in accordance with standard JTG 3420-2020 "Test Procedures for Cement and Cement Concrete in Highway Engineering". The test methods shall refer to GB / T50082-2009 "Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete" and other relevant regulations.

[0047] Table 2. Performance test results of corrosion-resistant PK plates prepared in the examples and comparative examples. Example 1 70 6.26 1.6 Example 2 72 6.21 1.7 Example 3 69 6.23 1.6 Example 4 71 5.18 1.9 Comparative Example 1 56 5.05 2.0 Comparative Example 2 63 4.90 2.1 Comparative Example 3 49 4.87 2.3 Comparative Example 4 45 3.98 2.5 Comparative Example 5 68 3.86 2.8 As shown in Table 1, the corrosion-resistant PK plates prepared in Examples 1-3 of this application have good compressive strength, crack resistance, and corrosion resistance. Comparing Example 4 with Example 1, it can be seen that the alkali-resistant glass fiber mesh, without vinyl ester resin-modified acrylic resin emulsion treatment, exhibits reduced crack resistance and corrosion resistance. This may be due to the lack of flexible vinyl ester resin-modified acrylic resin, leading to glass fiber deformation. Comparing Comparative Example 1 with Example 1, it can be seen that the ceramic powder, without polymer modification, exhibits reduced compressive strength, crack resistance, and corrosion resistance. This may be due to the lack of a polymer shell to absorb fracture energy and reduced density in the interfacial region. Comparing Comparative Example 2 with Example 1, it can be seen that the alkali-resistant glass fiber mesh, without polymer treatment, exhibits reduced compressive strength, crack resistance, and corrosion resistance. The reduced corrosion resistance is due to the fragility of glass fibers and the decreased bonding strength with other components of the cement composite. Comparing Example 3 with Example 1, it is evident that replacing cement with polymer-modified cement in equal amounts significantly reduces compressive strength, crack resistance, and corrosion resistance. This may be due to the presence of numerous voids and defects in the interfacial transition layer. Comparing Example 4 with Example 1, it is evident that without treatment of both cement and alkali-resistant glass fiber mesh, compressive strength, crack resistance, and corrosion resistance are significantly reduced, indicating that polymer-modified cement and corrosion-resistant fiber mesh have a synergistic corrosion resistance effect. Comparing Example 5 with Example 1, without the addition of corrosion-resistant fiber mesh, crack resistance and corrosion resistance are significantly reduced, possibly due to the lack of a uniform support system within the cement composite.

[0048] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A corrosion-resistant PK sheet, characterized in that, The raw materials include the following parts by weight: 50-60 parts polymer-modified cement, 20-30 parts corrosion-resistant fiber mesh, 30-45 parts aggregate, 5-8 parts gypsum, 5-10 parts fly ash, 0.5-0.7 parts water-reducing agent, 0.1-0.2 parts defoamer, and 20-25 parts water; the polymer-modified cement includes modified ceramic powder and silicate cement in a mass ratio of 2-3:10-12.

2. The corrosion-resistant PK plate according to claim 1, characterized in that, The method for preparing the modified ceramic powder includes the following steps: (1) Ceramic particles are crushed and ground, ultrasonically treated with dilute hydrochloric acid, washed, dried, and silane coupling agent solution is added. The pH value is adjusted to 4-5 and stirred at 50-60℃ for 1-2 hours to obtain pretreated ceramic powder. (2) Add the pretreated ceramic powder to DMF, add trithiocarbonate, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide, stir for 10-12 h, wash and dry to obtain ceramic composite. (3) The ceramic composite was added to THF, ultrasonically dispersed, and then azobisisobutyronitrile, styrene, and isoprene were added. The mixture was degassed by freeze-thaw cycle, sealed, heated at 65-70℃ for 10-12 hours, washed, and dried to obtain modified ceramic powder.

3. The corrosion-resistant PK plate according to claim 1, characterized in that, The method for preparing the corrosion-resistant fiber mesh fabric includes the following steps: (1) Immerse the alkali-resistant glass fiber mesh in an ethanol-water solution containing a silane coupling agent and dry it to obtain an activated glass fiber mesh. (2) The activated glass fiber mesh was immersed in a vinyl ester resin modified acrylic resin emulsion to obtain a pretreated glass fiber mesh. (3) The pretreated glass fiber mesh is immersed in epoxy resin emulsion and dried to obtain corrosion resistant fiber mesh.

4. The corrosion-resistant PK plate according to claim 3, characterized in that, The preparation method of the vinyl ester resin modified acrylic resin emulsion includes the following steps: (1) Sodium dodecylbenzenesulfonate and octylphenol polyoxyethylene ether were added to water and stirred until completely dissolved to obtain an aqueous phase; (2) Methyl methacrylate, butyl acrylate, acrylic acid and vinyl ester resin are stirred evenly to obtain an oil phase; (3) Under an inert gas atmosphere, the oil phase is slowly added dropwise to the aqueous phase, and the mixture is stirred at high speed and heated to 75-80℃ to obtain a pre-emulsion. Ammonium persulfate is added to the pre-emulsion with a mass fraction of 30%, and the mixture is kept at a constant temperature for 30-50 min to obtain a mixed solution. The pre-emulsion with a mass fraction of 70% and ammonium persulfate are slowly added dropwise to the mixed solution, and the mixture is kept at a constant temperature for 1-2 h. The mixture is then cooled to 35-40℃, and triethylamine is slowly added dropwise during the stirring process. The pH value is adjusted to 7-8, and an organosilicon defoamer is added. The mixture is stirred for 15-30 min to obtain a vinyl ester resin modified acrylic resin emulsion.

5. The corrosion-resistant PK plate according to claim 4, characterized in that, The mass ratio of methyl methacrylate, butyl acrylate, acrylic acid and vinyl ester resin is 45-50:40-43:4-6:9-10.

6. The corrosion-resistant PK plate according to claim 1, characterized in that, The aggregate is 5-20mm continuously graded basalt crushed stone.

7. The corrosion-resistant PK plate according to claim 1, characterized in that, The water-reducing agent is a polycarboxylate high-performance water-reducing agent.

8. The corrosion-resistant PK plate according to claim 1, characterized in that, The defoamer is an organosilicon powder defoamer.

9. A method for preparing a corrosion-resistant PK plate according to any one of claims 1-8, characterized in that, Includes the following steps: Polymer-modified cement, aggregate, gypsum, fly ash, water-reducing agent, and defoamer are added to water and mixed evenly to obtain a mixed slurry. Corrosion-resistant fiber mesh is laid in a mold, the mixed slurry is injected, vibrated and compacted, and cured to obtain a corrosion-resistant PK board.