CN111155388A - Photocatalytic pavement paving method - Google Patents
Photocatalytic pavement paving method Download PDFInfo
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- CN111155388A CN111155388A CN201911421235.7A CN201911421235A CN111155388A CN 111155388 A CN111155388 A CN 111155388A CN 201911421235 A CN201911421235 A CN 201911421235A CN 111155388 A CN111155388 A CN 111155388A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Catalysts (AREA)
Abstract
The embodiment of the invention discloses a photocatalytic pavement paving method, which comprises the following steps: coating a bonding material on the roadbed to form a bonding layer; coating a sol protection material on the surface of the bonding layer to form a sol protection layer; and coating mixed filler on the surface of the sol protective layer to form a photocatalytic purification layer partially embedded in the sol protective layer, wherein the mixed filler comprises a photocatalytic material, an adsorption material and filler. The embodiment of the invention not only can play a role in combining the influence of the oxidation-reduction reaction on the bonding layer and the base layer in the photocatalytic purification process, protecting the bonding layer and the base layer, but also can effectively prevent the loss of the photocatalytic material on the premise of ensuring the activity of the photocatalytic material.
Description
Technical Field
The invention relates to the field of road administration construction, in particular to a photocatalytic pavement paving method.
Background
With the rapid increase of automobile keeping quantity, the environmental pollution problem caused by a large amount of harmful substances discharged from automobile exhaust is more and more serious. Especially, nitrogen oxides (NOx) in the exhaust gas are very likely to form ozone, acid rain, photochemical smog, soil and water acidification, and Volatile Substances (VOCs) in the exhaust gas, and the like, thereby seriously damaging the road and the ecological environment around the road. How to eliminate the pollution of automobile exhaust has become a very serious environmental problem.
The photocatalytic material has photocatalytic activity under the action of solar energy, can generate a large amount of oxidizing substances, and has good air purification and antibacterial properties. The method has great technical value in the solution for removing nitrogen oxides (NOx) and Volatile Organic Compounds (VOCs).
In the process of paving the pavement on the photocatalytic pavement, the photocatalytic material is coated on the surface of the bonding layer to form a photocatalytic purification layer, so that harmful substances in tail gas can be effectively adsorbed, and the environmental pollution is reduced. However, in the process of implementing the present invention, the inventors found that the existing photocatalytic pavement, the pavement base layer on which the photocatalytic material is laid, is easily affected by the redox reaction of the photocatalytic material, and the photocatalytic material is easily worn, and the utilization rate needs to be improved.
Disclosure of Invention
The invention aims to provide a novel photocatalytic pavement paving method, which is used for blocking the influence of an oxidation-reduction reaction in a photocatalytic purification process on a pavement base layer, protecting the pavement base layer and reducing the loss of a photocatalytic material on the premise of ensuring the activity of the photocatalytic material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a photocatalytic paving method comprising:
coating a bonding material on the roadbed to form a bonding layer;
coating a sol protection material on the surface of the bonding layer to form a sol protection layer;
coating mixed filler on the surface of the sol protective layer when the sol protective layer is not completely cured to form a photocatalytic purification layer partially embedded in the sol protective layer;
the mixed filler comprises a photocatalytic material, an adsorption material and a filler.
In some possible embodiments, the photocatalytic material is formed by ball milling with stirring; and/or
And mechanically stirring the photocatalytic material, the adsorbing material and the filler for 6-12 hours to obtain the mixed filler.
In some possible embodiments, the coating times of coating the mixed filler on the surface of the sol protection layer to form the photocatalytic purification layer partially embedded in the sol protection layer is at least one time; and/or the coating mode is roll coating.
In some possible embodiments, the curing and hardening conditions for the sol protection layer are that the heating curing temperature is 50 ℃ to 95 ℃, the heating time is 1 to 5 hours, and the hardening time is 6 to 24 hours.
In some possible embodiments, the mass ratio of the photocatalytic material to the mixed filler is 5% to 20%.
In some possible embodiments, the amount of photocatalytic material is not more than 100g per square meter of pavement.
In some possible embodiments, the sol protective material comprises neutral SiO2Sol, acidic SiO2Sol, basic SiO2One or more of a sol; and/or
The photocatalytic material comprises a nano non-metal photocatalytic material g-C3N4Nano non-metal photocatalysis material g-C3N4At least one of a modifying material, a non-metal doped graphite phase carbon nitride material, a metal doped graphite phase carbon nitride material, an alkali metal doped graphite phase carbon nitride material, an alkaline earth metal doped graphite phase carbon nitride material, and a bismuth-based oxide material.
In some possible embodiments, the photocatalytic material comprises graphene/C3N4Composition and SiO2/C3N4Composition, modified CaCO3/C3N4At least one of the compositions.
In some possible embodiments, the filler comprises at least one of carbonate, bicarbonate, barite powder, talc, china clay, porous powdered quartz, white carbon black, precipitated barium sulfate, mica powder, wollastonite, bentonite; and/or
The binding material comprises at least one of hot-melt resin, asphalt, hydraulic binder, polyurethane coating, acrylic material and polydopamine; and/or
The adsorption material comprises at least one of active carbon, molecular sieve, coal, charcoal, bamboo charcoal, medical stone, zeolite, kaolinite, montmorillonite, diatomite and shell powder.
In some possible embodiments, the hot melt type resin comprises at least one of polypropylene, polycarbonate, polyamide.
The embodiment of the invention has the advantages that the sol protective layer is added between the bonding layer and the photocatalytic purification layer of the photocatalytic pavement, so that the influence of the oxidation-reduction reaction of the photocatalytic material in the purification process on the bonding layer and the pavement base layer is blocked, and the photocatalytic purification layer is jointed on the surface of the sol protective layer in a partially embedded mode, so that the effect of effectively preventing the photocatalytic material from being lost is realized on the premise of ensuring the activity of the photocatalytic material.
Drawings
One or more embodiments are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which elements having the same reference number designation may be represented by like elements. The drawings in the drawings are not to scale unless specifically noted.
Fig. 1 is a schematic diagram of a structure of a photocatalytic pavement obtained by using the photocatalytic pavement paving method provided by the embodiment of the invention; wherein 2-1 is a photocatalytic purification layer, 2-2 is a sol protective layer, and 2-3 is a bonding layer.
FIG. 2 is a graph illustrating the degradation trend of nitrogen oxides during the use of a photocatalytic pavement, which is obtained by using the photocatalytic pavement paving method provided by the embodiment of the present invention; wherein sample No. 1 is C3N4A material; sample No. 2 is graphene/C3N4(ii) a Sample No. 3 is bismuth oxycarbonate material.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numerical values set forth in the examples of the present invention are approximations, not necessarily values. All values within the error range may be included without limiting to the specific values disclosed in the embodiments of the present invention, where the error or experimental conditions allow.
The numerical ranges disclosed in the examples of the present invention are intended to indicate the relative amounts of the components in the mixture and the ranges of temperatures or other parameters recited in the other method examples. One or more numerical points within the numerical range are taken under appropriate conditions.
The photocatalytic pavement is characterized in that a photocatalytic material is coated in the pavement paving process, a photocatalytic purification layer is formed on the pavement by the photocatalytic material, and the photocatalysis activity of the photocatalytic material is stimulated by solar energy to generate oxidability so as to realize the functions of removing tail gas pollution, purifying air and the like.
One embodiment of the photocatalytic road surface laying method provided by the present embodiment is described in detail below with reference to fig. 1.
The embodiment mainly comprises the following steps:
110. and coating a bonding material on the roadbed to form a bonding layer.
The embodiment of the invention can directly coat the bonding material on the base layer of the existing pavement.
In some possible embodiments, the binding material may include one or more of a hot melt resin, asphalt, a hydraulic binder, a polyurethane coating, an acrylic material, polydopamine.
In some possible embodiments, the hot melt type resin may include one or more of polypropylene, polycarbonate, polyamide.
The skilled person can adjust or select a suitable bonding material to lay according to the needs of the actual situation; the bonding layer may also be cured and/or hardened as the case may be.
The pavement applicable to the embodiment of the invention comprises a highway with strict high standard requirement and a common highway; the pavement under special environment, such as tunnel pavement, pavement of underground garage, pavement of toll station, body-building green road, etc.
112. And coating a sol protection material on the surface of the bonding layer to form a sol protection layer.
The essence of the photocatalytic purification process is redox reaction, and a sol protective layer formed by the sol protective material can play a role in blocking the influence of the redox reaction on the bonding layer and the base layer and protecting the bonding layer and the base layer.
In some possible embodiments, the sol protective material may include neutral SiO2Sol, acidic SiO2Sol, basic SiO2One or more of sols.
Because the bonding layer is black under the general condition, the protective layer is semitransparent milk white, and the difference is good on the basis of black, the consumption of the sol protective material is only required to be that the black bonding material is completely covered on the road surface
113. And coating mixed filler on the surface of the sol protective layer when the sol protective layer is not completely cured to form a photocatalytic purification layer partially embedded in the sol protective layer, wherein the mixed filler comprises a photocatalytic material, an adsorption material and filler. The photocatalytic purification layer is jointed with the sol protective layer in a partially embedded mode and is stable in connection, even if an automobile is arranged on a road and the photocatalytic purification layer on the road surface is rolled for a long time, the photocatalytic purification layer is not easy to lose in a powder mode, and the photocatalytic purification layer with a naked surface can fully purify polluted air.
In the specific implementation, the partial embedding form between the sol protective layer and the photocatalytic purification layer can be a semi-embedding form, and the embedding proportion can be adjusted according to actual needs.
After the photocatalytic purification layer is coated, the conditions for curing and hardening the sol protection layer can be selected from the following conditions: the heating curing temperature is 50-95 ℃, the heating time is 1-5 hours, and the hardening time is 6-24 hours.
In some possible embodiments, the photocatalytic material is formed by ball milling with stirring;
in some possible embodiments, the photocatalytic material and the filler are mechanically stirred for 6 to 12 hours to obtain the mixed filler. The specific required stirring time can be determined or adjusted according to actual conditions.
In some possible embodiments, the photocatalytic material may be further subjected to a peeling and layering pretreatment for the two-dimensional layered material, so as to exert better catalytic effect and material utilization rate. The pretreatment method comprises acid treatment, alkali treatment, heat treatment, ball milling treatment and the like.
In some possible embodiments, the mixed filler is coated on the surface of the sol protective layer, and the number of times of forming the photocatalytic purification layer is at least one;
in some possible embodiments, the coating mode is roll coating, and multiple times of spraying can be performed according to actual needs.
The mixing manner of the mixed filler may include mechanical stirring, ball milling stirring, and the like. Generally, the photocatalytic material can be dispersed more uniformly by ball milling and stirring, and after the filler is added, the photocatalytic material can be used in pavement on a large scale by mechanical stirring.
In some possible embodiments, the amount of the photocatalytic material is not more than 100g per square meter of road surface, considering that the photocatalytic effect is not significant when the purification layer is too thin, the photocatalytic effect is not sufficiently exhibited when the purification layer is too thick, and the amount of the binder lost.
In some possible embodiments, the mass ratio of the photocatalytic material to the mixed filler is 5% to 20%.
In some possible embodiments, the photocatalytic material includes nano-nonmetal photocatalytic material g-C3N4Nano non-metal photocatalysis material g-C3N4At least one of a modifying material, a non-metal doped graphite phase carbon nitride material, a metal doped graphite phase carbon nitride material, an alkali metal doped graphite phase carbon nitride material, and an alkaline earth metal doped graphite phase carbon nitride material.
The nano non-metal photocatalytic material is two-dimensional layered material of carbon nitride and boron nitride.
The alkali metal or alkaline earth metal may be potassium-doped carbon nitride or sodium-doped carbon nitride, or the like.
The bismuth-based oxide may be bismuth trioxide, bismuth oxychloride, bismuth oxycarbonate, bismuth oxybromide, bismuth oxyiodide, etc.
In some possible embodiments, the photocatalytic material may include graphene/C3N4Composition and SiO2/C3N4Composition, modified CaCO3/C3N4One or more of the compositions.
In some possible embodiments, the filler may include one or more of carbonate, bicarbonate, barite powder, talc, china clay, porous powdered quartz, white carbon black, precipitated barium sulfate, mica powder, wollastonite, bentonite.
Wherein, the carbonate can include sodium carbonate, calcium carbonate, potassium carbonate, magnesium carbonate, barium carbonate, copper carbonate, ammonium carbonate, etc.; the bicarbonate includes calcium bicarbonate and the like.
In some possible embodiments, the adsorbent material may comprise one or more of activated carbon, molecular sieve, coal, charcoal, bamboo charcoal, medical stone, zeolite, kaolinite, montmorillonite, diatomaceous earth, shell powder.
According to the embodiment of the invention, the sol protective layer is added between the bonding layer and the photocatalytic purification layer of the photocatalytic pavement, and the photocatalytic purification layer and the sol protective layer are combined in a partially embedded manner, so that the effect of blocking the redox reaction in the photocatalytic purification process on the bonding layer and the pavement base layer is achieved, and the effect of effectively preventing the loss of the photocatalytic material is achieved on the premise of ensuring the activity of the photocatalytic material. The method has the advantages of simple process, short laying time, obvious air purification effect and convenience for highway pavement construction, has great application potential in open air purification fields such as road construction and the like, and is used in fields such as highway construction, body-building green roads, real estate and the like.
In the following, based on the photocatalytic road paving method provided by the present invention, several specific examples are listed for detailed description.
Example 1:
11) the adhesive material is coated on the basis of the existing pavement to form an adhesive layer, and the adhesive material is an acrylic acid material.
12) Coating a sol protective material on the surface of the bonding layer to form a sol protective layer, wherein the sol protective material is neutral SiO2And (3) sol.
The main function of the sol protective layer is to protect the adhesive layer from being damaged by the oxidation reaction of the photocatalytic material, and to protect the photocatalytic material.
The material used for the bonding layer is black in general, the sol protective layer is semitransparent milk white, the difference is good on the basis of black, and the coating amount is only needed to completely cover the sol protective material on the road surface.
13) And coating mixed filler on the surface of the sol protective layer to form a photocatalytic purification layer, wherein the mixed filler comprises a photocatalytic material, an adsorption material and filler.
Before curing or hardening, a photocatalytic purification layer is sprayed on the surface of the sol protection layer, a photocatalytic material, an adsorption material and a filler are mixed, ball-milled and stirred to obtain an adsorption type photocatalytic composite material, and the material is uniformly coated on the surface of the sol protection layer to form a photocatalytic pavement.
The photocatalytic material comprises a two-dimensional layered C3N4The material is subjected to acidification pretreatment to realize laminar peeling, the adsorbing material comprises activated carbon, the filler comprises calcium carbonate material, and the photocatalysis material is obtained by mixing and stirringThe stirring mode of the chemical composite material, the photocatalytic material and the adsorbing material is ball milling stirring, because the required fineness is higher, the stirring mode after the filler is added is a mechanical stirring mode, so that the chemical composite material is convenient for field construction and use, when the sol protective layer is not dried, the photocatalytic composite material is coated, and the photocatalytic pavement is formed through pavement compaction and maintenance.
Curing and hardening treatment are carried out, the heating temperature is 80 ℃, and the curing time is 6 hours.
Two-dimensional layer C3N4The material has excellent physicochemical properties, is suitable for being used as a pavement purification material, has the characteristic of high temperature resistance, can resist the temperature of 500 ℃, is far higher than the temperature of the pavement after the sunshine exposure, has good purification performance under the condition of low temperature, can be used under different environments and weather conditions, is acid-resistant and alkali-resistant, and can resist the corrosion of acid rain.
The proportion of the photocatalytic material in the total mass of the photocatalytic purification layer material is 10%, the amount of the photocatalytic material on the pavement is 50g per square meter of coating, and a test for simulating the degradation of nitrogen oxide by automobile exhaust (sample I) in a laboratory shows that the degradation rate of the nitrogen oxide exceeds 40%.
The photocatalytic pavement paving method provided by the embodiment of the invention has the advantages of simple process, short paving time, obvious air purification effect and convenience for highway pavement construction. The photocatalytic pavement prepared by the method can show good photocatalytic performance under natural light, the concentration of automobile exhaust is obviously reduced, and the photocatalytic material has good photochemical stability.
Example 2:
21) the method is characterized in that a bonding material is coated on a road base on the basis of the existing road surface to form a bonding layer, and asphalt is selected as the bonding material.
22) Coating a sol protection material on the surface of the bonding layer to form a sol protection layerThe sol protective material is neutral SiO2And (3) sol.
The main function of the sol protective layer is to protect the adhesive layer from being damaged by the oxidation reaction of the photocatalytic material, and to protect the photocatalytic material.
The material used for the bonding layer is black in general, the protective layer is semitransparent milk white, the difference is good on the basis of black, and the coating amount is only required to be that the pavement is completely covered with the sol protective material.
23) And coating mixed filler on the surface of the sol protective layer to form a photocatalytic purification layer which is half embedded into the sol protective layer, wherein the mixed filler comprises a photocatalytic material, an adsorption material and filler.
Before curing or hardening, spraying a photocatalytic purification layer on the surface of the sol protective layer, mixing a photocatalytic material, an adsorption material and a filler, ball-milling and stirring to obtain an adsorption type photocatalytic composite material, and uniformly coating the material on the surface of the sol protective layer to form a photocatalytic pavement
The curing treatment was carried out for 12 hours.
The photocatalytic material comprises graphene/C3N4Wherein graphene and C3N4The two are two-dimensional laminar materials, peel off the layering through acid treatment, reach better intercalation effect, the adsorbing material includes kaolinite, the filler includes the bentonite material, obtain the photocatalysis combined material through mixing the stirring, the stirring mode of photocatalysis material and adsorbing material is the ball-milling stirring, because the fineness of requirement is higher, the stirring mode after adding the filler is through the mode of mechanical stirring, the site operation of being convenient for uses, when the tie coat did not dry, the coating glazing catalysis combined material, through road surface compaction and maintenance, form the photocatalysis road surface.
Wherein the photocatalytic material C3N4The graphene is mixed with the graphene, the separation efficiency of hole electron pairs generated by the photocatalytic material is improved by adding the graphene, the light absorption is improved, and the catalytic performance of the photocatalytic material is enhanced, so that the amount is reduced, but the performance is not reduced.
The proportion of the photocatalytic material in the total mass of the photocatalytic purification layer material is 8%, the amount of the photocatalytic material on the pavement is 30g per square meter of coating, and the test of simulating the degradation of nitrogen oxide by automobile exhaust (sample II) in a laboratory shows that the degradation rate of the nitrogen oxide exceeds 40%.
The photocatalytic road paving method provided by the embodiment of the invention has the advantages of simple process, short paving time, obvious air purification effect and convenience for highway pavement construction. The photocatalytic pavement prepared by the method can show good photocatalytic performance under natural light, the concentration of automobile exhaust is obviously reduced, and the photocatalytic material has good photochemical stability, and the photocatalytic material can remove exhaust pollutants adsorbed by an adsorbing material, and the obtained product nitrate is fixed on the pavement, so that ions are formed and washed away when raining, and the photocatalytic material has great application potential in open air purification fields such as road construction and the like, and is used in fields such as pavement in areas with short sunshine time and weak illumination, road pavement with serious pollution, plant pavement with serious pollution, toll station pavement with more slowly-running vehicles, closed garage underground pavement, body-building green lane and the like.
Example 3:
31) a bonding material is coated on the basis of the existing pavement to form a bonding layer, and the bonding material is a polyurethane coating.
32) Coating a sol protective material on the surface of the bonding layer to form a sol protective layer, wherein the sol protective material is weakly alkaline SiO2And (3) sol.
The main function of the sol protective layer is to protect the adhesive layer from being damaged by the oxidation reaction of the photocatalytic material, and to protect the photocatalytic material.
The material used for the bonding layer is black in general, the protective layer is semitransparent milk white, the difference is good on the basis of black, and the coating amount is only required to be that the pavement is completely covered with the sol protective material.
33) And coating mixed filler on the surface of the sol protective layer to form a photocatalytic purification layer, wherein the mixed filler comprises a photocatalytic material, an adsorption material and filler.
Before curing or hardening, a photocatalytic purification layer is sprayed on the surface of the sol protection layer, a photocatalytic material, an adsorption material and a filler are mixed, ball-milled and stirred to obtain an adsorption type photocatalytic composite material, and the material is uniformly coated on the surface of the sol protection layer to form a photocatalytic pavement.
Heating and curing treatment is carried out, the heating temperature is 60 ℃, and the curing time is 10 hours.
CaCO modified by photocatalytic material3/C3N4The composite material is stripped through ball milling to reach smaller and more uniform size, the specific surface area of the material is increased, the adsorbing material comprises diatomite, the filler comprises wollastonite materials, the photocatalytic composite material is obtained through mixing and stirring, the stirring mode of the photocatalytic material and the adsorbing material is ball milling stirring, the required fineness is higher, the stirring mode after the filler is added is in a mechanical stirring mode, the photocatalytic composite material is convenient to use in site construction, when the bonding layer is not dried, the photocatalytic composite material is coated, and a photocatalytic pavement is formed through pavement compaction and maintenance.
In which CaCO is modified3With photocatalytic properties, to realize CO2The catalyst and the circulation of the catalyst are good in dispersibility and suspension property, and can partially replace C3N4After the composite material is compounded, the heat resistance and the waterproof performance of the composite material are enhanced.
The diatomite material has a good adsorption function, fixes gas pollutants and has a promotion effect on degrading gas by the photocatalytic material.
The proportion of the photocatalytic material in the total mass of the photocatalytic purification layer material is 15%, the amount of the photocatalytic material on the pavement is 55g per square meter of coating, and a test for simulating the degradation of nitrogen oxides by automobile exhaust (sample III) in a laboratory shows that the degradation rate of the nitrogen oxides exceeds 20%.
The photocatalytic pavement paving method provided by the embodiment of the invention has the advantages of simple process, short paving time, obvious air purification effect and convenience for highway pavement construction. The photocatalytic pavement prepared by the method can show good photocatalytic performance under natural light, the concentration of automobile exhaust is obviously reduced, and the photocatalytic material has good photochemical stability, and the photocatalytic material can remove exhaust pollutants adsorbed by an adsorbing material, so that the obtained product nitrate is fixed on the pavement, and can be washed away by ions formed in rainy days.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A photocatalytic paving method, comprising:
coating a bonding material on the roadbed to form a bonding layer;
coating a sol protection material on the surface of the bonding layer to form a sol protection layer;
coating mixed filler on the surface of the sol protective layer when the sol protective layer is not completely cured to form a photocatalytic purification layer partially embedded in the sol protective layer;
the mixed filler comprises a photocatalytic material, an adsorption material and a filler.
2. The photocatalytic paving method of claim 1, wherein the photocatalytic material is formed by ball milling, stirring and mixing; and/or
And mechanically stirring the photocatalytic material, the adsorbing material and the filler for 6-12 hours to obtain the mixed filler.
3. The photocatalytic road surface paving method according to claim 1, wherein the number of times of coating mixed fillers on the surface of the sol protective layer to form the photocatalytic purification layer partially embedded in the sol protective layer is at least one; and/or the coating mode is roll coating.
4. The photocatalytic paving method of claim 1, wherein the sol protective layer is cured and hardened at a temperature of 50 ℃ to 95 ℃ for 1 to 5 hours and at a hardening time of 6 to 24 hours.
5. The photocatalytic paving method according to claim 1, characterized in that the mass ratio of the photocatalytic material to the mixed filler is 5-20%.
6. The photocatalytic paving process according to any of claims 1 to 5, characterized in that the photocatalytic material is used in an amount not exceeding 100g per square meter of pavement.
7. The photocatalytic paving process of claim 1, wherein the sol-gel protective material comprises neutral SiO2Sol, acidic SiO2Sol, basic SiO2One or more of a sol; and/or
The photocatalytic material comprises a nano non-metal photocatalytic material g-C3N4Nano non-metal photocatalysis material g-C3N4At least one of a modifying material, a non-metal doped graphite phase carbon nitride material, a metal doped graphite phase carbon nitride material, an alkali metal doped graphite phase carbon nitride material, an alkaline earth metal doped graphite phase carbon nitride material, and a bismuth-based oxide material.
8. The photocatalytic paving method according to claim 1, characterized in that the photocatalytic material comprises graphene/C3N4Composition and SiO2/C3N4Composition, modificationCaCO3/C3N4At least one of the compositions.
9. The photocatalytic paving method according to claim 1, wherein the filler comprises at least one of carbonate, bicarbonate, barite powder, talc, china clay, porous quartz powder, white carbon black, precipitated barium sulfate, mica powder, wollastonite, and bentonite; and/or
The binding material comprises at least one of hot-melt resin, asphalt, hydraulic binder, polyurethane coating, acrylic material and polydopamine; and/or
The adsorption material comprises at least one of active carbon, molecular sieve, coal, charcoal, bamboo charcoal, medical stone, zeolite, kaolinite, montmorillonite, diatomite and shell powder.
10. The photocatalytic paving method as recited in claim 9, wherein the hot-melt resin comprises at least one of polypropylene, polycarbonate, and polyamide.
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