CN110713360B - Self-cleaning outdoor artificial stone slab and preparation method thereof - Google Patents
Self-cleaning outdoor artificial stone slab and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2061—Materials containing photocatalysts, e.g. TiO2, for avoiding staining by air pollutants or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/54—Substitutes for natural stone, artistic materials or the like
- C04B2111/542—Artificial natural stone
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Abstract
The invention relates to the technical field of artificial stones, and discloses a self-cleaning outdoor artificial stone plate and a preparation method thereof, wherein the self-cleaning outdoor artificial stone plate is prepared by prefabricating ultrahigh-performance mineral powder with the compressive strength of 100-150 MPa, and the ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 80-100 parts of mineral active powder, 8-13 parts of titanium dioxide, 150-220 parts of self-cleaning aggregate, 4-8 parts of nano silicon dioxide, 0.5-2 parts of a water repellent, 10-15 parts of water, 2-4 parts of a water reducing agent and 4-10 parts of pigment. The artificial stone slab has the advantages of good volume stability, good self-cleaning performance, low shrinkage, no warp deformation in use, extremely low water absorption, good durability, no aging and other problems, good surface stain resistance, low overall comprehensive cost and suitability for popularization and use.
Description
Technical Field
The invention relates to the technical field of artificial stones, in particular to a self-cleaning outdoor artificial stone plate and a preparation method thereof.
Background
Along with the upgrading of material manufacturing technology and equipment, aesthetic feeling and quality requirements of people, the artificial stone slab has the advantages of high strength, high flame retardance, high weather resistance, high acid and alkali resistance, wide color selectivity, vivid stone imitation effect, good decoration effect, suitability for industrial production, convenience in construction and the like, so that the artificial stone slab becomes an interior and exterior wall decoration material of various high-grade buildings at present.
Along with the development of industrial economy, industrial waste gas, automobile exhaust, haze etc. pollute and meet coming, and the outdoor artificial stone decorative board of building can not avoid receiving the pollution, and these pollutants form very strong adhesive force on the artificial stone plate surface very easily, only lean on the washing away of rainwater to have hardly washed away it totally. And due to the action of gravity and the scouring action of rainwater, pollutants can be pushed and pulled downwards to form strip-shaped pollutant traces on the board surface, so that the pollution is seriously influenced
The appearance decoration effect of the board surface and the beauty of the building. Under the existing conditions, only the 'spider man' can be used for cleaning regularly, a large amount of cleaning agent is consumed, and especially the cleaning of the curtain wall of a high-rise building threatens the personal safety of the 'spider man', so that the waste of the whole social resource is caused.
Titanium dioxide is a semiconductor material, has good chemical stability, photocatalytic activity and super-hydrophilicity, is safe and non-toxic, has low cost, and is widely applied to white pigments, porcelain glaze, vehicle decoration, building surface cooling, food additives, whitening agents and the like. Titanium dioxide has good photocatalytic activity and photoinduction super-hydrophilicity under the irradiation of sunlight, has the functions of self-cleaning, antibiosis, disinfection, air and water source purification and the like, and is already put into use in a plurality of industries such as buildings, traffic, new energy and the like. The invention discloses a stone-like paint with good anti-pollution and self-cleaning capabilities and a preparation method thereof, wherein the application number is 201910572001.6, and the stone-like paint with good anti-pollution and self-cleaning capabilities is prepared by adopting titanium dioxide nanosheets. Titanium dioxide has less practical application in the direct use of building boards.
Therefore, the research on a novel inorganic decorative plate integrating self-cleaning function, good decorative effect, good durability and vivid stone-like effect is the development direction of the building decorative material industry.
The self-cleaning outdoor artificial stone slab is a novel inorganic decorative slab developed aiming at the defects of the traditional outdoor decorative slab, has the advantages of good volume stability, good self-cleaning performance, low shrinkage, no warping deformation in use, extremely low water absorption rate, good durability, good mechanical property, good decorative effect and good stain resistance and water resistance, can be widely applied to outdoor architectural decoration, has wide market application prospect, and leads the development direction of future inorganic decorative slabs.
Disclosure of Invention
In view of the above, the invention provides a self-cleaning outdoor artificial stone slab with good volume stability, good self-cleaning performance, low shrinkage, no warp deformation in use, extremely low water absorption rate, good durability, good mechanical properties, good decorative effect and good stain resistance and water resistance and a preparation method thereof, aiming at overcoming at least one of the defects of the prior art, and solving the problem that the traditional outdoor decorative plate is not easy to clean after being easily polluted by outdoor organic matters and dust.
In order to solve the technical problems, the invention adopts the following technical scheme:
the self-cleaning outdoor artificial stone slab is prepared by prefabricating ultrahigh-performance mineral powder with compressive strength of 100-150 MPa, wherein the ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 80-100 parts of mineral active powder, 8-13 parts of titanium dioxide, 150-220 parts of self-cleaning aggregate, 4-8 parts of nano silicon dioxide, 0.5-2 parts of a water repellent, 10-15 parts of water, 2-4 parts of a water reducing agent and 4-10 parts of pigment.
Furthermore, the mineral active powder takes cement with the mass ratio of more than 42.5 as a main body and is doped with one or more active powders of silica fume, mineral powder, glass beads and zeolite powder, wherein the components of the mineral active powder are as follows: silica fume: mineral powder: glass beads: the zeolite powder is 1: 0.05-0.2: 0.5-1: 0-0.3: 0-0.2.
Further, titanium dioxide is 10~1000 nm's anatase titanium dioxide of particle size, utilizes its photocatalysis function on the one hand, with the complete oxidation of most organic pollutants and degradation for harmless inorganic micromolecules such as water and carbon dioxide, on the other hand utilizes its photoinduced super hydrophilicity, takes away the inorganic pollutant on rostone stone surface from rostone stone surface under the rain brush, keeps rostone stone surface clean as new.
Further, the self-cleaning aggregate is prepared by cleaning one or a combination of two of zeolite or ceramsite with a porous structure with the particle size of 20-70 meshes, and soaking the cleaned self-cleaning aggregate in self-cleaning photocatalytic suspension slurry formed by micro silicon powder, nano titanium dioxide, cement, micro bead powder, quartz stone powder, a dispersing agent, a retarding water reducing agent, water and a thickening agent. The porous structure of the aggregate can improve the surface area for adsorbing titanium dioxide and improve the self-cleaning performance of the artificial stone plate. The self-cleaning photocatalytic suspension slurry is characterized in that the mass ratio of cement, micro silicon powder, nano titanium dioxide, micro bead powder, quartz stone powder, a dispersing agent, a retarding water reducer, water and a thickening agent is 1: 0.05-0.15: 0.05-0.10: 0.10-0.20: 0.05-0.15: 0.003-0.006: 0.005-0.02: 0.25-0.4: 0.0001-0.0003, the concentration of the slurry is controlled to be 75-85%, and the fluidity of the slurry is controlled to be 250-300 mm. After being cleaned, the zeolite or the ceramsite with the porous structure enables the pH value of the surface of the zeolite or the ceramsite to be not less than 10, and then the zeolite or the ceramsite is soaked in the self-cleaning photocatalytic suspension slurry, so that the affinity between the surface of the porous aggregate and the self-cleaning photocatalytic suspension slurry is better, the alkali excitation effect can be exerted, and the interface bonding strength between the porous aggregate and a hydration product is improved. In the cleaning process, firstly, washing with water to remove impurities such as mud and mud blocks until clear water is discharged, then cleaning with an acetic acid solution with a pH value of 2-4 to remove weathers or corrosives on the surface, and finally soaking with a sodium hydroxide solution or a potassium hydroxide solution with a pH value of 10-12 to control the pH value of the surface to be not less than 10.
Furthermore, the particle size of the nano silicon dioxide is 5-100 nm, so that the wear resistance, the impermeability and the waterproof performance of the artificial stone plate can be improved.
Furthermore, the water repellent is polysiloxane or organic silicon, and plays a role in water resistance in the invention, so that the water resistance of the self-cleaning outdoor artificial stone plate is improved.
The preparation method of the self-cleaning outdoor artificial stone slab comprises the following steps:
s1, calculating the using amount of each raw material according to the proportion, and premixing all titanium dioxide and self-cleaning aggregate for 2-4 minutes;
s2, adding all mineral active powder, nano silicon dioxide, a water repellent, a pigment and 40wt% of water into the premixed aggregate obtained in the step S1, and stirring for 1-2 minutes;
s3, adding all the water reducing agent and the residual 60wt% of water into the pre-wetted mixture obtained in the step S2, and fully stirring for 7-9 minutes to obtain a mixture for later use;
s4, preparing a panel mould, and uniformly distributing the mixture prepared in the step S3 in the panel mould according to the thickness calculation and weighing;
s5, covering an isolation and moisture retention film on the mixture in the panel mold in the step S4, and then putting the mixture into a vacuum press for vacuumizing and exhausting and simultaneously performing vibration pressing;
s6, curing the board pressed in the step S5 at 40 ℃ for 6-8 hours, and then heating to 80-90 ℃ for curing for 12-16 hours to obtain a blank board;
s7, removing the isolation and moisture retention film from the blank plate obtained in the step S6, and scraping, fixing the thickness and polishing to obtain the self-cleaning outdoor artificial stone plate.
Further, in step S3, the mixture material is stirred for a wibo consistency of 5 to 30S; the initial setting time after stirring and mixing is not less than 60 minutes.
Further, in step S5, the vacuum pumping time is not less than 60S, and the pressing time is not less than 120S; the vacuum pressure is-0.07 to-0.1 MPa, the pressure load of the press is not less than 1MPa, and the pressure is not less than 5000 kN. In step S6, the high temperature curing process maintains the humidity above 75%.
Compared with the prior art, the invention has the following beneficial effects:
(1) the self-cleaning outdoor artificial stone slab has the characteristics of good volume stability, good self-cleaning performance, low shrinkage, no warping deformation in use, extremely low water absorption rate, good durability, good mechanical property, good decorative effect, good stain-resistant and waterproof performance, 100-inch compressive strength, 150 MPa, electric flux less than 100 coulombs and the like.
(2) The preparation method of the self-cleaning outdoor artificial stone slab, provided by the invention, has the advantages of low mould consumption and short mould turnover period, and solves the problems of high mould consumption and high cost of the traditional decorative concrete slab.
(3) The self-cleaning outdoor artificial stone slab provided by the invention has the advantages that the raw material source is wide, the industrial production can be realized, the production efficiency is high, the self-cleaning outdoor artificial stone slab belongs to a green energy-saving environment-friendly product, and the economic and social benefits are realized.
(4) In the preparation method of the self-cleaning outdoor artificial stone plate, the compactness of the ultra-high toughness concrete inorganic decorative plate is improved by adopting vacuum defoaming, so that the surface of the ultra-high toughness concrete inorganic decorative plate has no air holes after being polished, and the decorative effect is improved.
(5) The self-cleaning outdoor artificial stone plate provided by the invention adopts porous aggregate, so that the surface area of a titanium dioxide carrier can be increased, more titanium dioxide can be exposed on the surface after grinding and polishing, and the self-cleaning performance of the artificial stone plate is improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The self-cleaning outdoor artificial stone slab is prepared by prefabricating ultrahigh-performance mineral powder with compressive strength of 100-150 MPa, wherein the ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 80 parts of mineral active powder, 8 parts of titanium dioxide, 150 parts of self-cleaning aggregate, 4 parts of nano silicon dioxide, 0.5 part of water repellent, 10 parts of water, 2 parts of water reducing agent and 4 parts of pigment.
The mineral active powder takes cement of more than 42.5 as a main body and is doped with silica fume, mineral powder, glass beads and zeolite powder, and the mass ratio of the components of the mineral active powder is as follows: silica fume: mineral powder: glass beads: the zeolite powder is 1:0.125:0.75:0.15: 0.1.
The titanium dioxide is anatase titanium dioxide with the particle size of 10-1000 nm, on one hand, the photocatalytic function of the anatase titanium dioxide is utilized, most organic pollutants are completely oxidized and degraded into harmless inorganic micromolecules such as water and carbon dioxide, on the other hand, the photoinduced super-hydrophilicity of the anatase titanium dioxide is utilized, the inorganic pollutants on the surface of the artificial stone are taken away from the surface of the artificial stone under the rainwash, and the surface of the artificial stone is kept clean as new.
The self-cleaning aggregate is prepared by cleaning one or two of zeolite or ceramsite with a porous structure with the particle size of 20-70 meshes, and soaking the cleaned self-cleaning aggregate in self-cleaning photocatalytic suspension slurry formed by micro silicon powder, nano titanium dioxide, cement, micro bead powder, quartz stone powder, a dispersing agent, a retarding water reducing agent, water and a thickening agent. The porous structure of the aggregate can improve the surface area for adsorbing titanium dioxide and improve the self-cleaning performance of the artificial stone plate. The self-cleaning photocatalytic suspension slurry is characterized in that the mass ratio of cement, micro silicon powder, nano titanium dioxide, micro bead powder, quartz stone powder, a dispersing agent, a retarding water reducer, water and a thickening agent is 1: 0.05: 0.05: 0.10: 0.05: 0.003: 0.005: 0.25: 0.0001, controlling the concentration of the slurry to be 75-85%, and controlling the fluidity of the slurry to be 250-300 mm. The content of silicon dioxide in the micro silicon powder is not less than 85%, the activity index is more than 100%, and the average particle diameter is 0.18 um; the nano titanium dioxide is in an anatase crystal type, and the average particle diameter is 0.13 um; the cement requires above grade 42.5; the activity index of the micro-bead powder is more than 75%, and the fineness is more than 300 meshes; the fineness of the quartz stone powder is more than 800 meshes, and the content of silicon dioxide is 93%; the water reducing rate of the retarding water reducing agent is more than 30%, and the retarding time is 2-4 hours; the dispersant is one or more of sodium hexametaphosphate, polyacrylic acid, sodium dodecyl benzene sulfonate and the like; the thickening agent is methyl cellulose. The compressive strength of a test piece prepared from the self-cleaning photocatalytic suspension slurry is not lower than 80 MPa in 28 days, the tensile strength is not lower than 3.5 MPa, and the water absorption is lower than 1%. After being cleaned, the zeolite or the ceramsite with the porous structure enables the pH value of the surface of the zeolite or the ceramsite to be not less than 10, and then the zeolite or the ceramsite is soaked in the self-cleaning photocatalytic suspension slurry, so that the affinity between the surface of the porous aggregate and the self-cleaning photocatalytic suspension slurry is better, the alkali excitation effect can be exerted, and the interface bonding strength between the porous aggregate and a hydration product is improved. In the cleaning process, firstly, washing with water to remove impurities such as mud and mud blocks until clear water is discharged, then cleaning with an acetic acid solution with a pH value of 2-4 to remove weathers or corrosives on the surface, and finally soaking with a sodium hydroxide solution or a potassium hydroxide solution with a pH value of 10-12 to control the pH value of the surface to be not less than 10.
The particle size of the nano silicon dioxide is 5-100 nm, and the wear-resisting, anti-permeability and waterproof performances of the artificial stone plate can be improved.
The water repellent is polysiloxane or organic silicon, plays a role in water resistance, and improves the water resistance of the self-cleaning outdoor artificial stone plate.
The preparation method of the self-cleaning outdoor artificial stone slab comprises the following steps:
s1, calculating the using amount of each raw material according to the proportion, and premixing all titanium dioxide and self-cleaning aggregate for 2-4 minutes;
s2, adding all mineral active powder, nano silicon dioxide, a water repellent, a pigment and 40wt% of water into the premixed aggregate obtained in the step S1, and stirring for 1-2 minutes;
s3, adding all the water reducing agent and the residual 60wt% of water into the pre-wetted mixture obtained in the step S2, fully stirring for 7-9 minutes, testing the working degree of the mixture material to be stirred for 5-30S, and obtaining a mixture after stirring and mixing and initial setting for not less than 60 minutes;
s4, preparing a panel mould, and uniformly distributing the mixture prepared in the step S3 in the panel mould according to the thickness calculation and weighing;
s5, covering an isolation and moisture retention film on the mixture in the panel mold in the step S4, then putting the mixture into a vacuum press for vacuumizing and exhausting and simultaneously performing vibration pressing, wherein the vacuumizing time is not less than 60S, the pressing time is not less than 120S, the vacuum pressure is-0.07 to-0.1 MPa, the pressure intensity load of the press is not less than 1MPa, and the pressure is not less than 5000 kN;
s6, curing the board pressed in the step S5 at 40 ℃ for 6-8 hours, then heating to 80-90 ℃ for curing for 12-16 hours to obtain a blank board, and keeping the humidity above 75% in the high-temperature curing process;
s7, removing the isolation and moisture retention film from the blank plate obtained in the step S6, and scraping, fixing the thickness and polishing to obtain the self-cleaning outdoor artificial stone plate.
Example 2
The conditions were the same as in example 1 except that the formulation of the ultra-high performance mineral powder was different.
The ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 100 parts of mineral active powder, 13 parts of titanium dioxide, 220 parts of self-cleaning aggregate, 8 parts of nano silicon dioxide, 2 parts of water repellent, 15 parts of water, 4 parts of water reducing agent and 10 parts of pigment.
Example 3
The conditions were the same as in example 1 except that the formulation of the ultra-high performance mineral powder was different.
The ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 85 parts of mineral active powder, 9.5 parts of titanium dioxide, 170 parts of self-cleaning aggregate, 5 parts of nano silicon dioxide, 0.9 part of water repellent, 11 parts of water, 2.5 parts of water reducing agent and 5.5 parts of pigment.
Example 4
The conditions were the same as in example 1 except that the formulation of the ultra-high performance mineral powder was different.
The ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 95 parts of mineral active powder, 11.5 parts of titanium dioxide, 200 parts of self-cleaning aggregate, 7 parts of nano silicon dioxide, 1.6 parts of water repellent, 14 parts of water, 3.5 parts of water reducing agent and 8.5 parts of pigment. The mineral active powder takes cement above 42.5 as a main body and is doped with silica fume and mineral powder, and the mass ratio of the components of the mineral active powder is as follows: silica fume: 1 part of mineral powder: 0.05: 0.5. the self-cleaning photocatalytic suspension slurry is characterized in that the mass ratio of cement, micro silicon powder, nano titanium dioxide, micro bead powder, quartz stone powder, a dispersing agent, a retarding water reducer, water and a thickening agent is 1: 0.15: 0.10: 0.20: 0.15: 0.006: 0.02: 0.4: 0.0003.
example 5
The conditions were the same as in example 1 except that the formulation of the ultra-high performance mineral powder was different.
The ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 90 parts of mineral active powder, 10.5 parts of titanium dioxide, 185 parts of self-cleaning aggregate, 6 parts of nano silicon dioxide, 1.25 parts of water repellent, 12.5 parts of water, 3 parts of water reducing agent and 7 parts of pigment. The mineral active powder takes cement of more than 42.5 as a main body and is doped with silica fume, mineral powder, glass beads and zeolite powder, and the mass ratio of the components of the mineral active powder is as follows: silica fume: mineral powder: glass beads: the zeolite powder is 1:0.2:1:0.3: 0.2. The self-cleaning photocatalytic suspension slurry is characterized in that the mass ratio of cement, micro silicon powder, nano titanium dioxide, micro bead powder, quartz stone powder, a dispersing agent, a retarding water reducer, water and a thickening agent is 1: 1: 0.075: 0.15: 0.10: 0.0045: 0.0125: 0.325: 0.0002.
comparative example 1
The conditions were the same as in example 1 except that 60 parts of the mineral active powder was used.
Comparative example 2
The conditions were the same as in example 1 except for 3 parts of titanium dioxide.
Comparative example 3
The same procedure as in example 1 was repeated except that the self-cleaning aggregate was machine-made sand.
Comparative example 4
The conditions were the same as those in example 1 except that vacuum evacuation was not performed in step S5.
Comparative example 5
Except that no acetic acid solution with the pH value of 2-4 is used for cleaning weathered substances or corrosion on the surface in the cleaning process of the zeolite or ceramsite with the porous structure for preparing the self-cleaning aggregate, the other conditions are the same as those in the example 1.
Comparative example 6
The conditions were the same as in example 1 except that the pH of the surface of the zeolite or ceramsite having a porous structure used for preparing the self-cleaning aggregate was less than 10 after washing.
Comparative example 7
The conditions were the same as in example 1 except that the slurry concentration of the self-cleaning photocatalytic suspension slurry was less than 75% and the slurry fluidity was less than 250 mm.
Comparative example 8
The conditions were the same as in example 1 except that the self-cleaning photocatalytic suspension slurry was replaced with the nano titanium dioxide dispersion.
The self-cleaning artificial stone slabs prepared in the above examples 1-5 and comparative examples 1-8 were made into standard test pieces for performance testing, and the test results are shown in table 1:
TABLE 1 self-cleaning artificial stone plate Performance test results
From table 1, in the comparative example 1, 60 parts of the mineral active powder has more reduced compressive strength and photo-induced super-hydrophilicity and less reduced photo-catalytic activity compared with the example 1; compared with the example 1, 3 parts of titanium dioxide in the comparative example 2 has basically unchanged compressive strength, and both the photo-induced super-hydrophilicity and the photo-catalytic activity are reduced more; comparative example 3 self-cleaning aggregate was machine-made sand, and compared with example 1, compressive strength was not changed substantially, and both photo-induced super-hydrophilicity and photo-catalytic activity were decreased more; comparative example 4 no vacuum deaeration was performed, and compared to example 1, both the compressive strength and the photoinduced superhydrophilicity were decreased more, and the photocatalytic activity was decreased less; compared with the example 1, the cleaning process of the comparative example 5 does not use acetic acid solution with the pH value of 2-4 to clean the weathered substance or the corrosive substance on the surface for 3-5 minutes, so that the compressive strength is slightly reduced, the photo-induced super-hydrophilicity is reduced more, and the photo-catalytic activity is reduced less; in the comparative example 6, the pH value of the aggregate surface is lower than 10, and compared with the example 1, the compressive strength is slightly reduced, the photo-induced super-hydrophilicity is reduced more, and the photo-catalytic activity is reduced less; compared with the embodiment 1, the self-cleaning photocatalysis suspension slurry has the advantages that the slurry concentration of the self-cleaning photocatalysis suspension slurry is lower than 75%, the slurry fluidity is less than 250mm, the compressive strength is slightly reduced, and the photoinduced super-hydrophilicity and the photocatalytic activity are both greatly reduced; compared with the embodiment 1, the self-cleaning photocatalysis suspension slurry in the comparative example 8 is replaced by the nano titanium dioxide dispersion liquid, the compressive strength is slightly reduced, and the photo-induced super-hydrophilicity and the photo-catalytic activity are both reduced more. Through a large number of tests, the types of the mineral active powder, the titanium dioxide and the aggregate selected by the invention are optimal; the aggregate with the porous structure can increase the surface area of the titanium dioxide carrier, so that the content of the titanium dioxide exposed on the surface is increased, and the self-cleaning performance of the artificial stone plate is improved; the vacuum defoaming can improve the compactness of the decorative plate, thereby improving the mechanical property, the stain-resistant and waterproof property and the self-cleaning property of the decorative plate.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (11)
1. The self-cleaning outdoor artificial stone slab is characterized in that the self-cleaning outdoor artificial stone slab is prepared by prefabricating ultrahigh-performance mineral powder with the compressive strength of 100-150 MPa, wherein the ultrahigh-performance mineral powder comprises the following raw material components in parts by weight: 80-100 parts of mineral active powder, 8-13 parts of titanium dioxide, 150-220 parts of self-cleaning aggregate, 4-8 parts of nano silicon dioxide, 0.5-2 parts of water repellent, 10-15 parts of water, 2-4 parts of water reducing agent and 4-10 parts of pigment, wherein the self-cleaning aggregate is prepared by cleaning one or two of zeolite or ceramsite with a porous structure with the particle size of 20-70 meshes, and soaking the cleaned mixture in self-cleaning photocatalytic suspension slurry formed by silica fume, nano titanium dioxide, cement, bead powder, quartz stone powder, dispersing agent, retarding water reducing agent, water and thickening agent, and the mass ratio of the cement, the silica fume, the nano titanium dioxide, the bead powder, the quartz stone powder, the dispersing agent, the retarding water reducing agent and the thickening agent in the self-cleaning photocatalytic suspension slurry is 1: 0.05-0.15: 0.05-0.10: 0.10-0.20: 0.05-0.15: 0.003-0.006: 0.005-0.02: 0.25-0.4: 0.0001 to 0.0003.
2. A self-cleaning outdoor artificial stone board as claimed in claim 1, wherein said mineral active powder is mainly composed of cement above 42.5 and is doped with one or more active powders selected from silica fume, mineral powder, glass beads and zeolite powder.
3. A self-cleaning outdoor artificial stone board according to claim 2, characterized in that the mass ratio of the mineral active powder components is cement: silica fume: mineral powder: glass beads: the zeolite powder is 1: 0.05-0.2: 0.5-1: 0-0.3: 0-0.2.
4. A self-cleaning outdoor artificial stone board as claimed in claim 1, wherein said titanium dioxide is anatase type titanium dioxide having a particle size of 10 to 1000 nm.
5. A self-cleaning outdoor artificial stone board as claimed in claim 1, wherein the nano silica has a particle size of 5 to 100 nm.
6. A self-cleaning outdoor artificial stone board according to claim 1, wherein the water repellent is silicone.
7. A self-cleaning outdoor artificial stone board according to claim 6, characterised in that the silicone is polysiloxane.
8. A method for manufacturing a self-cleaning outdoor artificial stone slab as claimed in any one of claims 1 to 7, comprising the steps of:
s1, calculating the using amount of each raw material according to the proportion, and premixing all titanium dioxide and self-cleaning aggregate for 2-4 minutes;
s2, adding all mineral active powder, nano silicon dioxide, a water repellent, a pigment and 40wt% of water into the premixed aggregate obtained in the step S1, and stirring for 1-2 minutes;
s3, adding all the water reducing agent and the residual 60wt% of water into the pre-wetted mixture obtained in the step S2, and fully stirring for 7-9 minutes to obtain a mixture for later use;
s4, preparing a panel mould, and uniformly distributing the mixture prepared in the step S3 in the panel mould according to the thickness calculation and weighing;
s5, covering an isolation and moisture retention film on the mixture in the panel mold in the step S4, and then putting the mixture into a vacuum press for vacuumizing and exhausting and simultaneously performing vibration pressing;
s6, curing the board pressed in the step S5 at 40 ℃ for 6-8 hours, and then heating to 80-90 ℃ for curing for 12-16 hours to obtain a blank board;
s7, removing the isolation and moisture retention film from the blank plate obtained in the step S6, and scraping, fixing the thickness and polishing to obtain the self-cleaning outdoor artificial stone plate.
9. The method for preparing a self-cleaning outdoor artificial stone plate as claimed in claim 8, wherein in step S3, the mixture material is stirred for a period of 5-30S; the initial setting time after stirring and mixing is not less than 60 minutes.
10. The method for preparing a self-cleaning outdoor artificial stone board as claimed in claim 8, wherein in step S5, the evacuation time is not less than 60S, and the pressing time is not less than 120S; the vacuum pressure is-0.07 to-0.1 MPa, the pressure load of the press is not less than 1MPa, and the pressure is not less than 5000 kN.
11. The method of claim 8, wherein the high temperature curing process maintains the humidity above 75% in step S6.
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| CN201911122632.4A CN110713360B (en) | 2019-11-15 | 2019-11-15 | Self-cleaning outdoor artificial stone slab and preparation method thereof |
| PCT/CN2019/119776 WO2021092985A1 (en) | 2019-11-15 | 2019-11-20 | Self-cleaning artificial stone slab for outdoor use and method for fabrication thereof |
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| CN201911122632.4A CN110713360B (en) | 2019-11-15 | 2019-11-15 | Self-cleaning outdoor artificial stone slab and preparation method thereof |
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| CN115092619A (en) * | 2022-07-14 | 2022-09-23 | 山东京博装备制造安装有限公司 | Continuous operation system for CCUS carbon mineralization reaction and control method |
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| CN102838330A (en) * | 2012-09-04 | 2012-12-26 | 同济大学 | Self-clean self-purification cement-based facing material and production method thereof |
| WO2019043598A1 (en) * | 2017-08-30 | 2019-03-07 | Italcementi S.P.A. | Process for the preparation of photocatalytic slabs/sheets/blocks and relative photocatalytic slabs/sheets/blocks |
| CN110436843A (en) * | 2019-08-28 | 2019-11-12 | 黄贺明 | Artificial porous volcanic rock slabstone of one kind and preparation method thereof |
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| DE102005052397B4 (en) * | 2004-11-04 | 2009-04-23 | MC-BAUCHEMIE MÜLLER GmbH & Co. KG | Dry mortar mixture, aggregate for such a mixture, process for its preparation and its use |
| CN102392520A (en) * | 2011-08-17 | 2012-03-28 | 福建农林大学 | Self-cleaning marble prepared by dipping method and preparation method thereof |
| CN106220102A (en) * | 2016-08-15 | 2016-12-14 | 马鞍山十七冶工程科技有限责任公司 | A kind of colored automatically cleaning self-compacting concrete and preparation method |
| CN108546054B (en) * | 2018-07-26 | 2023-12-26 | 北京宝辰联合科技股份有限公司 | High Jiang Ziqing clean water surface layer mortar and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102838330A (en) * | 2012-09-04 | 2012-12-26 | 同济大学 | Self-clean self-purification cement-based facing material and production method thereof |
| WO2019043598A1 (en) * | 2017-08-30 | 2019-03-07 | Italcementi S.P.A. | Process for the preparation of photocatalytic slabs/sheets/blocks and relative photocatalytic slabs/sheets/blocks |
| CN110436843A (en) * | 2019-08-28 | 2019-11-12 | 黄贺明 | Artificial porous volcanic rock slabstone of one kind and preparation method thereof |
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