Highly acid and alkali resistant self-cleaning inorganic artificial stone and preparation method thereof

Abstract

This application relates to the field of building materials technology, and provides a high-acid and alkali resistant self-cleaning inorganic artificial stone and its preparation method. The method involves weighing silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material according to a specified ratio, wherein the calcium carbonate content in the silicon-based aggregate does not exceed 0.5% by mass. The weighed silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material are dry-mixed until uniformly mixed. A silane coupling agent aqueous solution is added to the uniformly mixed material and forcibly stirred to obtain a mixture. The mixture is placed in a mold and subjected to high-pressure molding under a pressure of not less than 10 MPa. The high-pressure molded product is demolded and cured to a specified age. The cured product is then surface-polished to obtain the high-acid and alkali resistant self-cleaning inorganic artificial stone. The method strictly controls the calcium carbonate content in the silicon-based aggregate, thus preventing acid etching reactions from occurring at the source.

Description

Technical Field

[0001] This application relates to the field of building materials technology, and in particular to a highly acid and alkali resistant self-cleaning inorganic artificial stone and its preparation method. Background Technology

[0002] Existing inorganic artificial stone has the following defects: First, the aggregate generally contains calcium carbonate, which is prone to corrosion when exposed to acids and alkalis, and cannot meet the acid and alkali resistance requirements of C2 level and above in BSEN14617 standard; Second, the internal porosity of the product is high, and the surface is prone to adsorbing stains and is difficult to clean; Third, the interfacial bonding strength between the aggregate and the matrix is ​​insufficient, and interfacial peeling is prone to occur in corrosive environments, resulting in a decrease in the durability of the product.

[0003] Therefore, a method is urgently needed to solve at least one of the above problems. Summary of the Invention

[0004] This application provides a highly acid and alkali resistant, self-cleaning inorganic artificial stone and its preparation method, aiming to solve many problems existing in current inorganic artificial stones.

[0005] In a first aspect, embodiments of this application provide a method for preparing highly acid- and alkali-resistant self-cleaning inorganic artificial stone, the method comprising: Weigh out the following materials according to the specified proportions: silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material, wherein the mass content of calcium carbonate in the silicon-based aggregate shall not exceed 0.5%. Weigh out the silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber and photocatalytic material and dry mix them until they are uniformly mixed. Add the silane coupling agent aqueous solution to the uniformly mixed material and force stir to obtain the mixture. The mixture is placed in a mold and subjected to a pressure of not less than 10MPa for high-pressure molding. The molded product is then demolded and cured to the specified age. The cured product is then surface-polished to obtain a high acid and alkali resistant self-cleaning inorganic artificial stone.

[0006] In some embodiments, the weighing of silica-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material according to the specified proportions includes: weighing 50 parts by weight of quartz aggregate, 30 parts by weight of silicate cement with a grade of 52.5, 10 parts by weight of silica fume, and 1.5 parts by weight of nano-titanium dioxide powder; weighing polyvinyl alcohol fiber with a length of 12 mm at a dosage of 1 kg per cubic meter; wherein the calcium carbonate content in the quartz aggregate does not exceed 0.3% by weight; weighing water according to a water-binder ratio of 0.28; mixing the water with a silane coupling agent to prepare a silane coupling agent aqueous solution; wherein the mass of the silane coupling agent accounts for 0.3% of the total mass of the high-strength cement and silica fume.

[0007] In some embodiments, the step of dry mixing the weighed silicon-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material until they are uniformly mixed includes: placing all the weighed solid materials into a forced mixer and continuously dry mixing for 3 minutes until all materials are uniformly dispersed and free of lumps.

[0008] In some embodiments, the step of adding a silane coupling agent aqueous solution to a dry-mixed material and forcibly stirring to obtain a mixture includes: slowly and uniformly adding a pre-prepared silane coupling agent aqueous solution to a dry-mixed material while maintaining forced stirring, and continuing to stir for 5 minutes until a mixture with a uniform texture and no segregation is obtained.

[0009] In some embodiments, the step of placing the mixture in a mold and applying a pressure of not less than 10 MPa for high-pressure molding includes: spreading the mixture evenly inside the mold and smoothing the surface, applying a constant pressure of 15 MPa to the mold, and holding the pressure for 30 seconds to complete the high-pressure molding.

[0010] In some embodiments, demolding the product after high-pressure molding includes: after the internal structure of the product after high-pressure molding has been initially solidified and stabilized, applying a uniform pushing force slowly along the side wall of the mold to remove the product completely from the mold.

[0011] In some embodiments, curing the demolded product to a specified age includes: transferring the demolded product into a standard curing room and curing it continuously for 28 days at a temperature of 20°C and a relative humidity of 95% or higher.

[0012] In some embodiments, the process of surface polishing of the cured product to obtain high acid and alkali resistant self-cleaning inorganic artificial stone includes: using diamond grinding discs to polish the surface of the cured product step by step, first using coarse grinding discs to remove surface laitance and uneven parts, and then using fine grinding discs to polish until the surface finish meets the design requirements.

[0013] In some embodiments, the method further includes: before weighing silicon-based aggregates, high-strength cement, inorganic binders, polyvinyl alcohol fibers, and photocatalytic materials according to the proportions, collecting environmental parameters such as pH, light intensity, pedestrian traffic, and stain type of the target application scenario of the product, inputting all collected parameters into a pre-trained machine learning model, and the machine learning model outputting corresponding raw material proportion adjustment values ​​and production process parameter adjustment values ​​according to the input parameters, weighing each raw material according to the adjusted raw material proportions, and executing subsequent dry mixing, forced stirring, high-pressure molding, demolding, curing, and polishing steps according to the adjusted production process parameters.

[0014] Secondly, this application provides a highly acid and alkali resistant, self-cleaning inorganic artificial stone, prepared based on the method described in any embodiment of this application.

[0015] This application achieves its goal by strictly controlling the calcium carbonate content in silicon-based aggregates to prevent acid etching at the source; using silane coupling agents to strengthen the interfacial bonding between the aggregate and the matrix, reducing the formation of interfacial microcracks; adding polyvinyl alcohol fibers to inhibit shrinkage cracks in the product; and reducing the internal porosity of the product through high-pressure molding at no less than 10 MPa. The synergistic effect of these four technologies enables the product to achieve an acid and alkali resistance rating of at least BSEN14617 standard C2.

[0016] The incorporated photocatalytic materials can decompose organic stains on the surface under light conditions, and combined with the dense surface with low porosity, it achieves excellent self-cleaning effect.

[0017] The toughening effect of polyvinyl alcohol fiber improves the impact resistance of the product and extends its service life.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart illustrating the steps of a method for preparing highly acid and alkali resistant self-cleaning inorganic artificial stone according to an embodiment of this application; Figure 2 This is a schematic diagram illustrating the principle of a method for preparing a highly acid and alkali resistant, self-cleaning inorganic artificial stone according to an embodiment of this application; Figure 3 This is a schematic block diagram of the structure of a preparation system for a highly acid and alkali resistant self-cleaning inorganic artificial stone according to an embodiment of this application; Figure 4 This is a schematic block diagram of the structure of a computer device provided in an embodiment of this application.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0024] It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present invention, the terms "first" and "second" are used in the embodiments of the present invention to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0025] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] Existing inorganic artificial stone has the following defects: First, the aggregate generally contains calcium carbonate, which is prone to corrosion when exposed to acids and alkalis, and cannot meet the acid and alkali resistance requirements of C2 level and above in BSEN14617 standard; Second, the internal porosity of the product is high, and the surface is prone to adsorbing stains and is difficult to clean; Third, the interfacial bonding strength between the aggregate and the matrix is ​​insufficient, and interfacial peeling is prone to occur in corrosive environments, resulting in a decrease in the durability of the product.

[0028] Please refer to Figure 1 and Figure 2 This application provides a method for preparing highly acid and alkali resistant self-cleaning inorganic artificial stone, aiming to solve the technical problems of insufficient acid and alkali resistance, high porosity and easy contamination, and poor durability caused by low interfacial bonding strength between aggregate and matrix in existing inorganic artificial stone.

[0029] This method achieves self-cleaning function by strictly controlling the calcium carbonate content in silicon-based aggregates, introducing silane coupling agents to improve interfacial bonding, using high-pressure molding process to reduce porosity, and combining photocatalytic materials to achieve self-cleaning function. This enables the final product to meet the acid and alkali resistance requirements of C2 level or above in BSEN14617 standard, while also possessing excellent anti-fouling self-cleaning performance and mechanical properties.

[0030] The overall process flow of this invention is as follows: Figure 1 As shown, the process includes three core steps: raw material weighing, dry mixing and forced stirring, and high-pressure molding and post-processing. The corresponding production system layout is as follows. Figure 2 As shown, it includes, in sequence, a raw material weighing area, a dry mixing area, a high-pressure molding area, a demolding area, a curing chamber, a curing area, and a polishing area.

[0031] The method for preparing the highly acid and alkali resistant self-cleaning inorganic artificial stone includes steps S101 to S103. Details are as follows: Step S101. Weigh out the silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber and photocatalytic material according to the proportion, wherein the mass content of calcium carbonate in the silicon-based aggregate does not exceed 0.5%.

[0032] Specifically, this step is in Figure 2 The raw material weighing area shown is complete, used to accurately prepare all the solid raw materials required for the preparation of highly acid and alkali resistant self-cleaning inorganic artificial stone.

[0033] Silica-based aggregates, as the skeletal material of inorganic artificial stone, provide basic mechanical strength and volume stability. This invention uses silica-based aggregates with low calcium carbonate content, where the calcium carbonate content is strictly controlled below 0.5% by mass. Calcium carbonate decomposes in acids to produce carbon dioxide and soluble calcium salts, and undergoes a dissolution reaction in alkalis, which is the main reason for the poor acid and alkali resistance of existing inorganic artificial stone. Controlling the calcium carbonate content to below 0.5% eliminates the potential for acid and alkali corrosion from the aggregate itself at the source.

[0034] High-strength cement, as a cementing material, binds aggregates together through a hydration reaction. This invention preferably uses silicate cement or ordinary silicate cement with a grade of not less than 42.5 to ensure that the product has sufficient early and later strength.

[0035] Inorganic binders are used to assist in cementation, further improving the density and strength of the matrix. Preferably, one or more of silica fume, fly ash, and slag powder are used, wherein the average particle size of silica fume is smaller than that of cement particles, which can fill the pores between cement hydration products, significantly improving the density and impermeability of the matrix.

[0036] Polyvinyl alcohol fibers, used as a reinforcing material, are uniformly dispersed in the matrix, effectively preventing the generation and propagation of microcracks and improving the flexural strength and impact resistance of the product. The fiber length is preferably 6mm-18mm, and the diameter is preferably 10μm-20μm.

[0037] Photocatalytic materials are used to impart self-cleaning properties to products. Preferred materials include nano-titanium dioxide and nano-zinc oxide, which possess photocatalytic activity. Under light conditions, these materials can decompose organic pollutants on the surface and simultaneously make the surface superhydrophilic, allowing rainwater to wash away dust and stains.

[0038] The weighing method involves weighing each of the above-mentioned raw materials according to the preset mass ratio. The weighing process is carried out using electronic weighing equipment with an accuracy of not less than 0.1 kg to ensure that the ratio error of each raw material does not exceed ±0.5%. After weighing, each raw material is stored in its corresponding storage bin, awaiting delivery to the dry mixing zone.

[0039] Step S102. Weigh the silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber and photocatalytic material and dry mix them until they are uniformly mixed. Add the silane coupling agent aqueous solution to the uniformly mixed material and force stir to obtain the mixture.

[0040] Specifically, this step is in Figure 2 The dry mixing zone shown is completed, used to mix the solid raw materials evenly, and to add an aqueous solution of silane coupling agent to prepare a mixture with good plasticity.

[0041] The dry mixing process involves adding the weighed silica-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material into a forced mixer. The mixer is started and dry-mixed at a speed of 30-50 rpm for at least 2 minutes, until all materials are evenly dispersed, without lumps or agglomerations. The purpose of dry mixing is to ensure the uniform distribution of various solid raw materials at both the macroscopic and microscopic levels, guaranteeing the uniformity of subsequent hydration reactions and the consistency of product performance.

[0042] The silane coupling agent aqueous solution is prepared by weighing water according to a preset water-cement ratio. The silane coupling agent is slowly added to the water while stirring continuously until it is completely dissolved, forming a homogeneous aqueous solution. The function of the silane coupling agent is to form an organic-inorganic transition layer on the aggregate surface, improving the interfacial bonding performance between the aggregate and the cement matrix, increasing the interfacial bond strength, and thus preventing acid and alkali solutions from penetrating into the interior of the product through the interface. The preferred dosage of the silane coupling agent is 0.1%-0.5% of the total mass of high-strength cement and inorganic binder.

[0043] The forced mixing process involves slowly and uniformly adding the prepared silane coupling agent aqueous solution to the dry-mixed material while keeping the mixer running. The addition process lasts for 1-2 minutes. After addition, forced mixing continues at 50-70 rpm for 3-8 minutes until a homogeneous mixture without segregation or bleeding is obtained. Forced mixing ensures that the silane coupling agent fully coats the aggregate surface and that cement particles are evenly dispersed in the water, guaranteeing a complete hydration reaction.

[0044] Step S103. Place the mixture in a mold and apply a pressure of not less than 10 MPa for high-pressure molding. Demold the product after high-pressure molding and cure the product after curing to the specified age. Polish the surface of the cured product to obtain high acid and alkali resistant self-cleaning inorganic artificial stone.

[0045] Specifically, this step is performed in sequence as follows: Figure 2 The high-pressure molding zone, demolding zone, curing chamber, curing zone, and polishing zone shown are completed to prepare the mixture into the final inorganic artificial stone product.

[0046] High-pressure molding involves evenly spreading a well-mixed material inside a steel mold, smoothing the surface with a scraper to ensure uniform thickness. The mold containing the mixture is then fed into a hydraulic forming machine, where a constant pressure of at least 10 MPa is applied for high-pressure molding, with a holding time of at least 20 seconds. High-pressure molding forces air out of the mixture, significantly reducing porosity and increasing density. This increased density not only enhances the mechanical properties of the product but also effectively prevents the penetration of acid and alkali solutions and stains, thereby improving acid and alkali resistance and stain resistance.

[0047] After high-pressure molding is completed, the mold is removed from the hydraulic molding machine. Once the internal structure of the product has initially solidified and stabilized (generally 1-2 hours after molding), a hydraulic demolding device is used to slowly apply uniform pushing force along the side wall of the mold to remove the product completely from the mold. During demolding, impacts and vibrations should be avoided to prevent cracks or damage to the product.

[0048] Curing involves transferring the demolded products into a curing chamber and allowing them to stand for 24 hours at a temperature of 15℃-25℃ and a relative humidity of 60%-80% to achieve sufficient initial strength. The products are then transferred to a standard curing chamber and continuously cured at a temperature of 20℃±2℃ and a relative humidity above 95% until the specified age (generally 28 days). During curing, direct sunlight and wind should be avoided to ensure complete cement hydration and gradual development of strength and durability.

[0049] After the curing process, the product is sent to the polishing area for surface treatment. Diamond grinding discs are used to polish the surface of the product in stages. First, coarse grinding discs with a grit of 80-120 mesh are used to remove surface slurry and uneven areas. Then, fine grinding discs with grits of 240, 400, and 800 mesh are used for polishing until the surface finish meets the design requirements. The polished surface is smooth and even, further improving its stain resistance and self-cleaning effect.

[0050] In some embodiments, the weighing of silica-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material according to the specified proportions includes: weighing 50 parts by weight of quartz aggregate, 30 parts by weight of silicate cement with a grade of 52.5, 10 parts by weight of silica fume, and 1.5 parts by weight of nano-titanium dioxide powder; weighing polyvinyl alcohol fiber with a length of 12 mm at a dosage of 1 kg per cubic meter; wherein the calcium carbonate content in the quartz aggregate does not exceed 0.3% by weight; weighing water according to a water-binder ratio of 0.28; mixing the water with a silane coupling agent to prepare a silane coupling agent aqueous solution; wherein the mass of the silane coupling agent accounts for 0.3% of the total mass of the high-strength cement and silica fume.

[0051] The raw materials were weighed as follows: 50 parts by weight of quartz aggregate (containing 0.25% calcium carbonate), 30 parts by weight of silicate cement grade 52.5, 10 parts by weight of silica fume, and 1.5 parts by weight of nano-titanium dioxide powder. Polyvinyl alcohol fibers with a length of 12 mm were weighed at a dosage of 1 kg per cubic meter of the mixture. Water was weighed according to a water-cement ratio of 0.28, and a silane coupling agent aqueous solution was prepared by adding the silane coupling agent to the water, wherein the mass of the silane coupling agent accounted for 0.3% of the total mass of the high-strength cement and silica fume.

[0052] Dry mixing involves placing all the above solid materials into a forced mixer and continuously dry mixing at a speed of 40 r / min for 3 minutes until all materials are evenly dispersed and free of lumps.

[0053] Forced stirring involves slowly and uniformly adding the prepared silane coupling agent aqueous solution to the dry mixture while keeping the mixer running for 1.5 minutes. After addition, forced stirring continues for 5 minutes at 60 rpm to obtain a homogeneous mixture without segregation.

[0054] High-pressure molding involves evenly spreading the mixture in a 600mm×600mm×20mm steel mold and smoothing the surface. The mold is then fed into a hydraulic molding machine, where a constant pressure of 15MPa is applied and held for 30 seconds to complete the high-pressure molding process.

[0055] After molding, the product is left to stand for 1.5 hours and then removed completely from the mold using a hydraulic demolding device.

[0056] Curing involves transferring the demolded product into a curing room and allowing it to stand for 24 hours at a temperature of 20℃ and a relative humidity of 70%. Then, it is transferred to a standard curing room and cured continuously for 28 days at a temperature of 20℃±2℃ and a relative humidity of over 95%.

[0057] Polishing involves sequentially grinding and polishing the surface of the product using diamond grinding discs of 80 grit, 240 grit, 400 grit, and 800 grit to obtain highly acid and alkali resistant, self-cleaning inorganic artificial stone.

[0058] The inorganic artificial stone prepared in this embodiment was tested and found to have a compressive strength of 125 MPa and a flexural strength of 18 MPa. According to BS EN 14617 standards, acid and alkali resistance tests were conducted. After immersion in a 5% sulfuric acid solution for 28 days, the mass loss rate was 0.12%; after immersion in a 5% sodium hydroxide solution for 28 days, the mass loss rate was 0.08%, meeting the C3 grade acid and alkali resistance requirements. Under ultraviolet light irradiation, the degradation rate of methyl orange was 92%, demonstrating excellent self-cleaning properties.

[0059] In some embodiments, the step of dry mixing the weighed silicon-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material until they are uniformly mixed includes: placing all the weighed solid materials into a forced mixer and continuously dry mixing for 3 minutes until all materials are uniformly dispersed and free of lumps.

[0060] The raw materials were weighed as follows: 55 parts by weight of quartz aggregate (containing 0.3% calcium carbonate), 28 parts by weight of silicate cement grade 42.5, 8 parts by weight of fly ash, and 1.2 parts by weight of nano-titanium dioxide powder. Polyvinyl alcohol fibers with a length of 9 mm were weighed at a dosage of 0.8 kg per cubic meter of the mixture. Clean water was weighed according to a water-cement ratio of 0.30. The silane coupling agent accounted for 0.25% of the total mass of the high-strength cement and fly ash.

[0061] Dry mixing is performed by dry mixing at a speed of 35 r / min for 2.5 minutes.

[0062] Forced mixing is carried out for 1 minute during the feeding process, and then the mixture is stirred at a speed of 55 r / min for 4 minutes after the feeding is completed.

[0063] High-pressure molding involves applying a constant pressure of 12 MPa and holding it for 25 seconds.

[0064] In some embodiments, the step of adding a silane coupling agent aqueous solution to a dry-mixed material and forcibly stirring to obtain a mixture includes: slowly and uniformly adding a pre-prepared silane coupling agent aqueous solution to a dry-mixed material while maintaining forced stirring, and continuing to stir for 5 minutes until a mixture with a uniform texture and no segregation is obtained.

[0065] The raw materials were weighed as follows: 48 parts by weight of quartz aggregate (containing 0.2% calcium carbonate), 32 parts by weight of silicate cement grade 52.5, 12 parts by weight of slag powder, and 1.8 parts by weight of nano-zinc oxide powder. Polyvinyl alcohol fibers with a length of 15 mm were weighed at a dosage of 1.2 kg per cubic meter of mixture. Water was weighed according to a water-cement ratio of 0.27. The silane coupling agent accounted for 0.35% of the total mass of high-strength cement and slag powder.

[0066] In some embodiments, the step of placing the mixture in a mold and applying a pressure of not less than 10 MPa for high-pressure molding includes: spreading the mixture evenly inside the mold and smoothing the surface, applying a constant pressure of 15 MPa to the mold, and holding the pressure for 30 seconds to complete the high-pressure molding.

[0067] The difference between this embodiment and the above embodiment lies only in the different process parameters for dry mixing and forced stirring. Specifically, the dry mixing is carried out at a speed of 45 r / min for 3.5 minutes. Forced stirring is performed continuously for 2 minutes during the feeding process, and after the feeding is completed, the stirring is carried out at a speed of 65 r / min for 6 minutes.

[0068] The steps of raw material weighing, high-pressure molding, demolding, curing, and polishing are the same as those in the above embodiments.

[0069] In some embodiments, demolding the product after high-pressure molding includes: after the internal structure of the product after high-pressure molding has been initially solidified and stabilized, applying a uniform pushing force slowly along the side wall of the mold to remove the product completely from the mold.

[0070] The only difference between this embodiment and the previous embodiment is the high-pressure molding process parameters, as follows: High-pressure molding involves applying a constant pressure of 20 MPa and holding it for 40 seconds. The steps for raw material weighing, dry mixing, forced stirring, demolding, curing, and polishing are the same as in the previous embodiment.

[0071] In some embodiments, curing the demolded product to a specified age includes: transferring the demolded product into a standard curing room and curing it continuously for 28 days at a temperature of 20°C and a relative humidity of 95% or higher.

[0072] The only difference between this embodiment and the above embodiments is the demolding and curing process, as follows: Demolding is performed by letting the mold stand for 2 hours after molding. Curing involves letting the mold stand in a curing chamber for 36 hours, followed by curing in a standard curing chamber for 28 days.

[0073] In some embodiments, the process of surface polishing of the cured product to obtain high acid and alkali resistant self-cleaning inorganic artificial stone includes: using diamond grinding discs to polish the surface of the cured product step by step, first using coarse grinding discs to remove surface laitance and uneven parts, and then using fine grinding discs to polish until the surface finish meets the design requirements.

[0074] The only difference between this embodiment and the previous embodiment is the polishing process. Specifically, the polishing involves sequentially polishing the surface of the product using diamond grinding discs of 80 grit, 160 grit, 320 grit, 600 grit, and 1200 grit. The steps for raw material weighing, dry mixing, forced stirring, high-pressure molding, demolding, and curing are the same as in the previous embodiment.

[0075] In some embodiments, the method further includes: before weighing silicon-based aggregates, high-strength cement, inorganic binders, polyvinyl alcohol fibers, and photocatalytic materials according to the proportions, collecting environmental parameters such as pH, light intensity, pedestrian traffic, and stain type of the target application scenario of the product, inputting all collected parameters into a pre-trained machine learning model, and the machine learning model outputting corresponding raw material proportion adjustment values ​​and production process parameter adjustment values ​​according to the input parameters, weighing each raw material according to the adjusted raw material proportions, and executing subsequent dry mixing, forced stirring, high-pressure molding, demolding, curing, and polishing steps according to the adjusted production process parameters.

[0076] This embodiment provides an adaptive preparation method based on machine learning, which can automatically adjust the raw material ratio and production process parameters according to the needs of different application scenarios. Specifically, it includes: environmental parameter collection, which involves collecting environmental parameters of the target application scenario of the product before weighing the raw materials according to the ratio, including environmental pH, light intensity, traffic flow, and stain type. Specifically, environmental pH is collected using a pH sensor, light intensity is collected using a light sensor, traffic flow is counted using video surveillance equipment, and stain type is classified using image recognition technology.

[0077] Parameter prediction involves inputting all collected environmental parameters into a pre-trained machine learning model. This model employs the random forest algorithm, trained on historical production data and corresponding product performance data, and is able to output corresponding raw material ratio adjustment values ​​and production process parameter adjustment values ​​based on the input environmental parameters.

[0078] When the environmental pH is high, the model outputs adjustment values ​​to increase the silane coupling agent dosage and high-pressure molding pressure to further improve the product's acid and alkali resistance. When the light intensity is high, the model outputs adjustment values ​​to appropriately reduce the photocatalytic material dosage, reducing costs while ensuring self-cleaning effect. When there is high traffic, the model outputs adjustment values ​​to increase the polyvinyl alcohol fiber dosage and cement grade to improve the product's wear resistance and mechanical strength. When the stain type is mainly oily, the model outputs adjustment values ​​to increase the surface polishing smoothness to enhance stain resistance. Adaptive production weighs each raw material according to the adjusted raw material ratio output by the machine learning model, and executes subsequent dry mixing, forced stirring, high-pressure molding, demolding, curing, and polishing steps according to the adjusted production process parameters to prepare highly acid and alkali resistant self-cleaning inorganic artificial stone suitable for specific application scenarios.

[0079] This embodiment introduces machine learning technology to achieve intelligent and adaptive inorganic artificial stone preparation process, enabling customized production for the special needs of different application scenarios, and ensuring that the product maintains optimal performance in various complex environments.

[0080] In some embodiments, for the extreme environments of coastal areas with high salt spray, high humidity, and strong ultraviolet radiation, the technical problems of chloride ion penetration corrosion, surface weathering and powdering, and rapid decline in self-cleaning performance of ordinary inorganic artificial stone after long-term use are solved.

[0081] The raw material proportions by weight are as follows: 52 parts of silicon-based aggregate, of which the silicon-based aggregate is quartz aggregate, with a calcium carbonate content of 0.2% and a particle size distribution of 5-10 mesh: 10-20 mesh: 20-40 mesh = 3:4:3; 28 parts of high-strength cement, which is grade 52.5R early-strength silicate cement; 12 parts of inorganic binder, which is a mixture of 6 parts silica fume and 6 parts metakaolin; 1.2 parts of reinforcing fiber, which is polyacrylonitrile fiber with a length of 9 mm; 2 parts of photocatalytic material, which is nitrogen-doped nano-titanium dioxide powder with a particle size of 10-20 nm; 1.5 parts of composite anti-salt spray agent, which is a mixture of 0.8 parts of nano-zirconia and 0.7 parts of organosilicon waterproofing agent; 0.4 parts of modified silane coupling agent, which is obtained by compounding γ-aminopropyltriethoxysilane and fluorosilane in a 3:1 ratio; and a water-binder ratio of 0.26.

[0082] First, the raw materials are pre-treated by mixing nano-zirconia with organosilicon waterproofing agent and dispersing the mixture in a high-speed disperser at 3000 rpm for 15 minutes to prepare a uniform composite anti-salt spray slurry. Then, dry mixing is performed by adding silicon-based aggregates, high-strength cement, silica fume, metakaolin, polyacrylonitrile fiber, and nitrogen-doped nano-titanium dioxide to a forced mixer and dry mixing at 45 rpm for 4 minutes until the materials are completely and uniformly dispersed. Next, a coupling agent aqueous solution is prepared by adding the compounded modified silane coupling agent to water and stirring until completely dissolved. The pre-prepared composite anti-salt spray slurry is then added, and stirring is continued for 5 minutes to form a uniform mixture. Finally, forced mixing is performed. Stirring: Slowly and evenly add the mixture to the dry mixture for 2 minutes. After addition, force stir at 65 r / min for 7 minutes to obtain a uniform mixture. Then, perform high-pressure molding: spread the mixture in the mold, apply a constant pressure of 18 MPa, and hold for 40 seconds to complete the molding. Demolding and curing: after molding, let stand for 2 hours before demolding. First, cure in the curing room for 36 hours, then transfer to the standard curing room for 28 days. Finally, perform surface treatment: first, polish with 80-800 grit diamond grinding discs in stages, then perform surface silane impregnation treatment: immerse the product in a 5% silane solution for 5 minutes, then remove and air dry for 24 hours. The performance test results are as follows: compressive strength 135MPa, flexural strength 19MPa; after 1000 hours of salt spray test according to GB / T1865 standard, there are no obvious corrosion marks on the surface and the mass loss rate is 0.06%; the acid and alkali resistance test meets the C3 level requirements; after 1000 hours of ultraviolet light irradiation, the methyl orange degradation rate is still above 89% and the self-cleaning performance decay rate is less than 5%.

[0083] In some embodiments, for medical settings such as hospitals and laboratories, this invention addresses the technical problems of ordinary inorganic artificial stone surfaces being prone to bacterial growth, difficult to thoroughly disinfect, and lacking resistance to chemical disinfectants.

[0084] The raw material proportions by weight are as follows: 50 parts of silicon-based aggregate, which is fused silica aggregate with a calcium carbonate content of 0.15%; 30 parts of high-strength cement, which is grade 52.5 silicate cement; 10 parts of inorganic binder, which is a mixture of 4 parts of nano-calcium carbonate whiskers and 6 parts of silica fume; 1 part of reinforcing fiber, which is glass fiber with a length of 6 mm; 2.5 parts of composite antibacterial photocatalytic material, which is a mixture of 1.5 parts of nano-titanium dioxide and 1 part of silver-loaded zirconium phosphate; 0.35 parts of silane coupling agent; and a water-binder ratio of 0.27.

[0085] First, a composite antibacterial agent was prepared by mixing silver-loaded zirconium phosphate powder and nano-titanium dioxide powder at a mass ratio of 2:3 and ball milling at 200 r / min for 2 hours to uniformly disperse the antibacterial agent on the surface of the photocatalytic material, forming a composite antibacterial photocatalytic material. Then, dry mixing was performed by adding silicon-based aggregates, high-strength cement, nano-calcium carbonate whiskers, silica fume, glass fiber, and the composite antibacterial photocatalytic material into a mixer and dry mixing at 40 r / min for 3.5 minutes. Finally, forced stirring was performed. The silane coupling agent aqueous solution was slowly added to the dry mixture. After the addition was complete, the mixture was stirred at 60 rpm for 6 minutes. Then, high-pressure molding was performed, applying a pressure of 16 MPa and holding for 35 seconds. Demolding and curing followed, with the molded material left to stand for 1.5 hours before demolding and standard curing for 28 days. Finally, surface polishing was performed using diamond grinding discs of 80, 160, 320, 600, 1200, and 2000 meshes to achieve a surface roughness Ra ≤ 0.02 μm. Performance test results were as follows: compressive strength 128 MPa, flexural strength 17.5 MPa; acid and alkali resistance met C3 grade requirements; antibacterial rates against Escherichia coli and Staphylococcus aureus both exceeded 99.9%, with long-lasting and stable antibacterial performance; the surface was ultra-smooth and easy to clean, and could withstand repeated wiping with common disinfectants such as chlorine-containing disinfectants and alcohol without corrosion or discoloration.

[0086] In some embodiments, for high-end building exterior walls, floors and other scenarios with high requirements for surface performance and structural strength, the technical problem that a single formula cannot simultaneously meet the requirements of high surface weather resistance and high overall strength and low cost is solved by adopting gradient functional design to achieve an optimized balance between performance and cost.

[0087] The raw material composition is divided into a top layer and a bottom layer. The top layer is 3-5mm thick and, by weight, consists of: 45 parts silica-based aggregate (high-purity quartz sand, calcium carbonate content 0.1%); 32 parts high-strength cement; 13 parts silica fume; 0.8 parts polyvinyl alcohol fiber; 3 parts nano-titanium dioxide; 0.45 parts silane coupling agent; and a water-binder ratio of 0.25. The bottom layer is 15-17mm thick and, by weight, consists of: 55 parts silica-based aggregate (ordinary quartz sand, calcium carbonate content 0.4%); 25 parts high-strength cement; 10 parts fly ash; 1.5 parts polyvinyl alcohol fiber; 0.5 parts nano-titanium dioxide; 0.2 parts silane coupling agent; and a water-binder ratio of 0.30.

[0088] First, a surface mixture is prepared by weighing raw materials according to the surface formula and preparing the surface mixture according to the aforementioned step S102. Then, a bottom mixture is prepared by weighing raw materials according to the bottom mixture formula and preparing the bottom mixture according to the aforementioned step S102. Next, the materials are layered and laid out. First, the bottom mixture is evenly spread on the bottom of the mold, the surface is smoothed, and the thickness is controlled at 16mm. Then, the surface mixture is evenly spread on top of the bottom mixture, the surface is smoothed, and the total thickness is controlled at 20mm. Then, stepwise high-pressure molding is performed. First, a pre-pressure of 5MPa is applied to the mold and held for 10 seconds to allow the two layers of materials to initially bond. Then, the pressure is gradually increased to 15MPa and held for 30 seconds to complete the overall molding. Then, demolding and curing are performed. After molding, the mold is left to stand for 2 hours before demolding, and standard curing is performed for 28 days. Finally, the surface is polished. Only the surface is polished, and the polishing depth is controlled within 1mm to avoid grinding through the functional layer. The performance test results are as follows: overall compressive strength 120MPa, flexural strength 17MPa; surface acid and alkali resistance meets C3 grade requirements, methyl orange degradation rate 93%; bottom layer mechanical properties meet structural requirements, production cost is reduced by more than 25% compared to the full surface layer formula; the interface bonding strength between the two layers reaches 8MPa, with no delamination or peeling.

[0089] In some embodiments, in response to the needs of solid waste resource utilization, the technical problems of high impurity content, poor interfacial bonding, and unstable product performance of recycled silicon-based aggregates are solved, so as to realize the high-value utilization of industrial solid wastes such as waste quartz sand and granite scraps.

[0090] The raw material proportions by weight are as follows: 53 parts recycled silica-based aggregate, obtained by crushing and screening waste quartz sand and granite scraps mixed in a 7:3 ratio, with a calcium carbonate content of 0.45% after pretreatment; 27 parts high-strength cement, which is grade 52.5R silicate cement; 12 parts inorganic binder, which is a mixture of 7 parts slag powder and 5 parts silica fume; 1.3 parts reinforcing fiber, which is 12mm long polyvinyl alcohol fiber; 1.8 parts photocatalytic material, which is nano-titanium dioxide; 0.4 parts modified silane coupling agent; 0.5 parts high-efficiency water-reducing agent; and a water-binder ratio of 0.29.

[0091] First, the recycled aggregate undergoes pretreatment. Waste quartz sand and granite scraps are crushed and sieved to a particle size range of 5-40 mesh. They are then soaked in 5% dilute hydrochloric acid for 24 hours to remove surface-adhered calcium carbonate and other soluble impurities. After rinsing with water until neutral, the aggregates are dried at 105℃ to constant weight. The dried recycled aggregates are then placed in a high-speed mixer, preheated to 60℃, and sprayed with a 1% silane coupling agent ethanol solution. The mixture is stirred for 10 minutes for surface modification. Next, dry mixing is performed, combining the pretreated recycled aggregates with high-strength cement. Slag powder, silica fume, polyvinyl alcohol fiber, and nano-titanium dioxide were added to a mixer and dry-mixed at 40 rpm for 4 minutes. Then, forced mixing was performed, and the silane coupling agent aqueous solution and high-efficiency water-reducing agent were mixed evenly and slowly added to the dry mixture. After the addition was complete, the mixture was stirred at 60 rpm for 6 minutes. Next, high-pressure molding was performed, applying a pressure of 17 MPa and holding it for 35 seconds. Demolding and curing followed, with the molded material left to stand for 1.5 hours before demolding and standard curing for 28 days. Finally, surface polishing was performed according to conventional processes. Performance test results were: compressive strength 115 MPa, flexural strength 16.5 MPa; acid and alkali resistance met C2 grade requirements; methyl orange degradation rate 87%; recycled aggregate utilization rate exceeded 50%, meeting green building material requirements, and production costs were reduced by 15%.

[0092] In some embodiments, to address the technical problems of long curing cycles and low production efficiency in traditional processes for large-scale industrial production, rapid product production is achieved through early strength systems and microwave curing technology.

[0093] The raw material proportions by weight are as follows: 50 parts silica-based aggregate, which is quartz aggregate with a calcium carbonate content of 0.3%; 30 parts early-strength high-strength cement, which is grade 62.5R sulfoaluminate cement; 10 parts inorganic binder, which is silica fume; 1.2 parts reinforcing fiber, which is polyvinyl alcohol fiber with a length of 12mm; 1.5 parts photocatalyst material, which is nano titanium dioxide; 1 part composite early-strength agent, which is a mixture of 0.6 parts aluminum sulfate and 0.4 parts triethanolamine; 0.3 parts silane coupling agent; and a water-binder ratio of 0.28.

[0094] First, dry mixing is performed by adding silicon-based aggregates, high-strength early-early-strength cement, silica fume, polyvinyl alcohol fiber, nano-titanium dioxide, and composite early-strength agent to a mixer and dry mixing at 40 rpm for 3 minutes. Then, forced mixing is performed by adding an aqueous solution of silane coupling agent to the dry mixture and stirring at 60 rpm for 5 minutes after the addition is complete. Next, high-pressure molding is performed by applying a pressure of 15 MPa and holding it for 30 seconds. After that, microwave curing is performed. The product is demolded immediately after molding and sent to a microwave curing kiln. The first stage has a microwave power density of 1.5 kW / m³, a curing temperature of 60℃, and a curing time of 4 hours. The second stage has a microwave power density of 1.0 kW / m³, a curing temperature of 50℃, and a curing time of 8 hours. After curing, the product is allowed to cool naturally to room temperature. Then, standard curing is performed. After microwave curing, the product is transferred to a standard curing room for 7 days of further curing. Finally, the surface is polished according to conventional processes. Performance test results show that after 7 days of microwave curing, the compressive strength reaches 120MPa and the flexural strength reaches 17MPa, which is equivalent to more than 95% of the strength after 28 days of traditional process; the acid and alkali resistance test meets the C2 level requirements, and the methyl orange degradation rate is 86%; the production cycle is shortened from 28 days to 10 days, and the production efficiency is increased by 180%.

[0095] In some embodiments, for public places with high fire resistance requirements such as subways, tunnels, and large shopping malls, the technical problems of low fire resistance and easy cracking and deformation of ordinary inorganic artificial stone at high temperatures are solved.

[0096] The raw material proportions by weight are as follows: 48 parts silica-based aggregate, which is quartz aggregate with a calcium carbonate content of 0.25%; 25 parts high-strength cement, which is grade 52.5 silicate cement; 15 parts inorganic binder, which is a mixture of 8 parts silica fume and 7 parts metakaolin; 1.5 parts reinforcing fiber, which is basalt fiber with a length of 15mm; 1.2 parts photocatalytic material, which is nano titanium dioxide; 8 parts composite fireproof filler, which is a mixture of 5 parts aluminum hydroxide and 3 parts expanded vermiculite; 0.35 parts silane coupling agent; and a water-binder ratio of 0.30.

[0097] First, fire-retardant filler pretreatment is performed by grinding aluminum hydroxide and expanded vermiculite to below 200 mesh and drying them at 120℃ for 2 hours to remove moisture. Then, dry mixing is carried out by adding silicon-based aggregates, high-strength cement, silica fume, metakaolin, basalt fiber, nano titanium dioxide, and composite fire-retardant filler into a mixer and dry mixing at 45 r / min for 4 minutes. Next, forced mixing is performed by adding an aqueous solution of silane coupling agent to the dry mixture and stirring at 65 r / min for 6 minutes after the addition is completed. Then, high-pressure molding is performed by applying a pressure of 16 MPa and holding it for 35 seconds. After demolding and curing, the molded material is allowed to stand for 2 hours before demolding and standard curing is performed for 28 days. Finally, surface treatment is performed by conventional grinding and polishing, and a layer of transparent fire-retardant coating with a coating thickness of 0.1 mm is applied to the surface. The performance test results are as follows: compressive strength 118MPa, flexural strength 17MPa; acid and alkali resistance test meets C2 level requirements, methyl orange degradation rate 85%; fire resistance test according to GB8624 standard, combustion performance reaches A1 level, maintains structural integrity for more than 30 minutes at 1000℃ high temperature, without cracking or release of toxic fumes.

[0098] Please see Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the high acid and alkali resistant self-cleaning inorganic artificial stone preparation system 200 provided in this application embodiment. The high acid and alkali resistant self-cleaning inorganic artificial stone preparation system 200 is used to perform the steps of the high acid and alkali resistant self-cleaning inorganic artificial stone preparation method shown in the above embodiments. The high acid and alkali resistant self-cleaning inorganic artificial stone preparation system 200 can be a single server or a server cluster, or it can be a terminal, such as a handheld terminal, a laptop computer, a wearable device, or a robot.

[0099] like Figure 3 As shown, the preparation system 200 for high acid and alkali resistant self-cleaning inorganic artificial stone includes: The proportioning and weighing unit 201 is used to weigh silicon-based aggregates, high-strength cement, inorganic binders, polyvinyl alcohol fibers, and photocatalytic materials according to the proportions, wherein the mass content of calcium carbonate in the silicon-based aggregates does not exceed 0.5%; The mixing unit 202 is used to dry mix the weighed silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber and photocatalytic material until they are uniformly mixed, and to add a silane coupling agent aqueous solution to the uniformly mixed material and force stir to obtain a mixture. The finished product acquisition unit 203 is used to place the mixture in a mold and apply a pressure of not less than 10MPa for high-pressure molding, demold the product after high-pressure molding, cure the product after demolding to a specified age, and polish the surface of the cured product to obtain high acid and alkali resistant self-cleaning inorganic artificial stone.

[0100] In some embodiments, the weighing of silica-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material according to the specified proportions includes: weighing 50 parts by weight of quartz aggregate, 30 parts by weight of silicate cement with a grade of 52.5, 10 parts by weight of silica fume, and 1.5 parts by weight of nano-titanium dioxide powder; weighing polyvinyl alcohol fiber with a length of 12 mm at a dosage of 1 kg per cubic meter; wherein the calcium carbonate content in the quartz aggregate does not exceed 0.3% by weight; weighing water according to a water-binder ratio of 0.28; mixing the water with a silane coupling agent to prepare a silane coupling agent aqueous solution; wherein the mass of the silane coupling agent accounts for 0.3% of the total mass of the high-strength cement and silica fume.

[0101] In some embodiments, the step of dry mixing the weighed silicon-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material until they are uniformly mixed includes: placing all the weighed solid materials into a forced mixer and continuously dry mixing for 3 minutes until all materials are uniformly dispersed and free of lumps.

[0102] In some embodiments, the step of adding a silane coupling agent aqueous solution to a dry-mixed material and forcibly stirring to obtain a mixture includes: slowly and uniformly adding a pre-prepared silane coupling agent aqueous solution to a dry-mixed material while maintaining forced stirring, and continuing to stir for 5 minutes until a mixture with a uniform texture and no segregation is obtained.

[0103] In some embodiments, the step of placing the mixture in a mold and applying a pressure of not less than 10 MPa for high-pressure molding includes: spreading the mixture evenly inside the mold and smoothing the surface, applying a constant pressure of 15 MPa to the mold, and holding the pressure for 30 seconds to complete the high-pressure molding.

[0104] In some embodiments, demolding the product after high-pressure molding includes: after the internal structure of the product after high-pressure molding has been initially solidified and stabilized, applying a uniform pushing force slowly along the side wall of the mold to remove the product completely from the mold.

[0105] In some embodiments, curing the demolded product to a specified age includes: transferring the demolded product into a standard curing room and curing it continuously for 28 days at a temperature of 20°C and a relative humidity of 95% or higher.

[0106] In some embodiments, the process of surface polishing of the cured product to obtain high acid and alkali resistant self-cleaning inorganic artificial stone includes: using diamond grinding discs to polish the surface of the cured product step by step, first using coarse grinding discs to remove surface laitance and uneven parts, and then using fine grinding discs to polish until the surface finish meets the design requirements.

[0107] In some embodiments, the method further includes: before weighing silicon-based aggregates, high-strength cement, inorganic binders, polyvinyl alcohol fibers, and photocatalytic materials according to the proportions, collecting environmental parameters such as pH, light intensity, pedestrian traffic, and stain type of the target application scenario of the product, inputting all collected parameters into a pre-trained machine learning model, and the machine learning model outputting corresponding raw material proportion adjustment values ​​and production process parameter adjustment values ​​according to the input parameters, weighing each raw material according to the adjusted raw material proportions, and executing subsequent dry mixing, forced stirring, high-pressure molding, demolding, curing, and polishing steps according to the adjusted production process parameters.

[0108] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the preparation system and each module of the high acid and alkali resistant self-cleaning inorganic artificial stone described above can be referred to the corresponding content in the various embodiments of the preparation method of the high acid and alkali resistant self-cleaning inorganic artificial stone, and will not be repeated here.

[0109] The above-mentioned method for preparing highly acid and alkali resistant self-cleaning inorganic artificial stone can be implemented as a computer program, which can be used in, for example... Figure 3 It runs on the system shown.

[0110] Please see Figure 4 , Figure 4 This is a schematic block diagram of the structure of a computer device provided in an embodiment of this application. The computer device includes a processor, a memory, and a network interface connected via a device bus, wherein the memory may include a storage medium and internal memory.

[0111] The storage medium can store operating devices and computer programs. The computer program includes program instructions that, when executed, cause the processor to perform any method for preparing highly acid- and alkali-resistant, self-cleaning inorganic artificial stone.

[0112] The processor provides computing and control capabilities, supporting the operation of the entire computer device.

[0113] The internal memory provides an environment for the execution of computer programs in non-volatile storage media. When the computer program is executed by the processor, it enables the processor to execute any method for preparing highly acid- and alkali-resistant self-cleaning inorganic artificial stone.

[0114] This network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the terminal to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0115] It should be understood that the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0116] In one embodiment, the processor is configured to run a computer program stored in memory to perform the following steps: Weigh out the following materials according to the specified proportions: silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material, wherein the mass content of calcium carbonate in the silicon-based aggregate shall not exceed 0.5%. Weigh out the silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber and photocatalytic material and dry mix them until they are uniformly mixed. Add the silane coupling agent aqueous solution to the uniformly mixed material and force stir to obtain the mixture. The mixture is placed in a mold and subjected to a pressure of not less than 10MPa for high-pressure molding. The molded product is then demolded and cured to the specified age. The cured product is then surface-polished to obtain a high acid and alkali resistant self-cleaning inorganic artificial stone.

[0117] In some embodiments, the weighing of silica-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material according to the specified proportions includes: weighing 50 parts by weight of quartz aggregate, 30 parts by weight of silicate cement with a grade of 52.5, 10 parts by weight of silica fume, and 1.5 parts by weight of nano-titanium dioxide powder; weighing polyvinyl alcohol fiber with a length of 12 mm at a dosage of 1 kg per cubic meter; wherein the calcium carbonate content in the quartz aggregate does not exceed 0.3% by weight; weighing water according to a water-binder ratio of 0.28; mixing the water with a silane coupling agent to prepare a silane coupling agent aqueous solution; wherein the mass of the silane coupling agent accounts for 0.3% of the total mass of the high-strength cement and silica fume.

[0118] In some embodiments, the step of dry mixing the weighed silicon-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material until they are uniformly mixed includes: placing all the weighed solid materials into a forced mixer and continuously dry mixing for 3 minutes until all materials are uniformly dispersed and free of lumps.

[0119] In some embodiments, the step of adding a silane coupling agent aqueous solution to a dry-mixed material and forcibly stirring to obtain a mixture includes: slowly and uniformly adding a pre-prepared silane coupling agent aqueous solution to a dry-mixed material while maintaining forced stirring, and continuing to stir for 5 minutes until a mixture with a uniform texture and no segregation is obtained.

[0120] In some embodiments, the step of placing the mixture in a mold and applying a pressure of not less than 10 MPa for high-pressure molding includes: spreading the mixture evenly inside the mold and smoothing the surface, applying a constant pressure of 15 MPa to the mold, and holding the pressure for 30 seconds to complete the high-pressure molding.

[0121] In some embodiments, demolding the product after high-pressure molding includes: after the internal structure of the product after high-pressure molding has been initially solidified and stabilized, applying a uniform pushing force slowly along the side wall of the mold to remove the product completely from the mold.

[0122] In some embodiments, curing the demolded product to a specified age includes: transferring the demolded product into a standard curing room and curing it continuously for 28 days at a temperature of 20°C and a relative humidity of 95% or higher.

[0123] In some embodiments, the process of surface polishing of the cured product to obtain high acid and alkali resistant self-cleaning inorganic artificial stone includes: using diamond grinding discs to polish the surface of the cured product step by step, first using coarse grinding discs to remove surface laitance and uneven parts, and then using fine grinding discs to polish until the surface finish meets the design requirements.

[0124] In some embodiments, the method further includes: before weighing silicon-based aggregates, high-strength cement, inorganic binders, polyvinyl alcohol fibers, and photocatalytic materials according to the proportions, collecting environmental parameters such as pH, light intensity, pedestrian traffic, and stain type of the target application scenario of the product, inputting all collected parameters into a pre-trained machine learning model, and the machine learning model outputting corresponding raw material proportion adjustment values ​​and production process parameter adjustment values ​​according to the input parameters, weighing each raw material according to the adjusted raw material proportions, and executing subsequent dry mixing, forced stirring, high-pressure molding, demolding, curing, and polishing steps according to the adjusted production process parameters.

[0125] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the steps of the method for preparing highly acid- and alkali-resistant self-cleaning inorganic artificial stone as provided in any embodiment of this application.

[0126] The computer-readable storage medium may be an internal storage unit of the computer device described in the foregoing embodiments, such as the hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the computer device.

[0127] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for preparing a highly acid and alkali resistant, self-cleaning inorganic artificial stone, characterized in that, include: Weigh out the following materials according to the specified proportions: silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material, wherein the mass content of calcium carbonate in the silicon-based aggregate shall not exceed 0.5%. Weigh out the silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber and photocatalytic material and dry mix them until they are uniformly mixed. Add the silane coupling agent aqueous solution to the uniformly mixed material and force stir to obtain the mixture. The mixture is placed in a mold and subjected to a pressure of not less than 10MPa for high-pressure molding. The molded product is then demolded and cured to the specified age. The cured product is then surface-polished to obtain a high acid and alkali resistant self-cleaning inorganic artificial stone.

2. The method according to claim 1, characterized in that, The proportions of silicon-based aggregate, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material weighed according to the specified ratio include: Weigh out 50 parts by weight of quartz aggregate, 30 parts of silicate cement with grade 52.5, 10 parts of silica fume, and 1.5 parts of nano titanium dioxide powder. Weigh out 12 mm long polyvinyl alcohol fiber at a dosage of 1 kg per cubic meter. The calcium carbonate content in the quartz aggregate does not exceed 0.3% by mass. Water is weighed according to a water-cement ratio of 0.28, and the water is mixed with silane coupling agent to prepare an aqueous solution of silane coupling agent. The mass of silane coupling agent accounts for 0.3% of the total mass of high-strength cement and silica fume.

3. The method according to claim 1, characterized in that, The process of dry-mixing the weighed silicon-based aggregates, high-strength cement, inorganic binder, polyvinyl alcohol fiber, and photocatalytic material until uniformly mixed includes: Place all weighed solid materials into a forced mixer and continue dry mixing for 3 minutes until all materials are evenly dispersed and free of lumps.

4. The method according to claim 1, characterized in that, The process of adding an aqueous solution of silane coupling agent to a dry-mixed material and then forcibly stirring to obtain a mixture includes: Slowly and uniformly add the pre-prepared aqueous solution of silane coupling agent to the dry-mixed material while maintaining forced stirring. Continue stirring for 5 minutes until a homogeneous mixture without segregation is obtained.

5. The method according to claim 1, characterized in that, The step of placing the mixture in a mold and applying a pressure of not less than 10 MPa for high-pressure molding includes: Spread the mixture evenly inside the mold and smooth the surface. Apply a constant pressure of 15 MPa to the mold and hold the pressure for 30 seconds to complete the high-pressure molding.

6. The method according to claim 1, characterized in that, The demolding of the high-pressure molded product includes: After the internal structure of the product has initially solidified and stabilized after high-pressure molding, apply uniform thrust slowly along the side wall of the mold to remove the product completely from the mold.

7. The method according to claim 1, characterized in that, The process of curing the demolded product to a specified age includes: After demolding, the product is transferred to a standard curing room and cured continuously for 28 days at a temperature of 20°C and a relative humidity of over 95%.

8. The method according to claim 1, characterized in that, The process of surface polishing the cured product to obtain highly acid and alkali resistant, self-cleaning inorganic artificial stone includes: The surface of the finished product is polished step by step using diamond grinding discs. First, coarse grinding discs are used to remove surface slurry and uneven areas, and then fine grinding discs are used to polish the surface until the finish meets the design requirements.

9. The method according to claim 1, characterized in that, The method further includes: Before weighing the silicon-based aggregates, high-strength cement, inorganic binders, polyvinyl alcohol fibers, and photocatalytic materials according to the specified ratio, environmental parameters such as pH, light intensity, traffic flow, and stain type are collected for the target application scenario of the product. All collected parameters are input into a pre-trained machine learning model. The machine learning model outputs corresponding raw material ratio adjustment values ​​and production process parameter adjustment values ​​based on the input parameters. Each raw material is weighed according to the adjusted raw material ratio, and subsequent dry mixing, forced stirring, high-pressure molding, demolding, curing, and polishing steps are executed according to the adjusted production process parameters.

10. A highly acid- and alkali-resistant, self-cleaning inorganic artificial stone, characterized in that, Prepared according to the method described in any one of claims 1-9.

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