CN114276041B - Interface treatment method for light ceramsite - Google Patents
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Abstract
The invention belongs to the technical field of building material treatment methods, and particularly relates to a light ceramsite interface treatment method which sequentially comprises the following steps: (1) The surface of the light ceramsite is cleaned and then wrapped by a steel wire mesh to form a light ceramsite filter bed; (2) Inorganic superfine powder nano silicon dioxide with smooth surface is selected, fluidized by high pressure air and then passes through a light ceramsite filter bed; (3) Spraying a permeable interface treating agent on the ceramsite, and drying; (4) Spraying phenyl silicone resin surface sealing agent on the ceramsite, curing, and sieving. The method can effectively improve the strength of the light ceramsite and the binding power between the light ceramsite and a gel material, and simultaneously can reduce the porosity of the surface of the light ceramsite and improve the durability. The light ceramsite obtained by the invention has the following characteristics: the ceramsite has wide sources, the superfine powder reduces the porosity of the ceramsite, and the ceramsite has high strength, light weight, strong interface binding force, good durability and wide application.
Description
Technical Field
The invention belongs to the technical field of building material treatment methods, and particularly relates to a light ceramsite interface treatment method.
Background
Building energy conservation and environmental protection are important links for the country to build a novel society. The ceramsite concrete has the characteristics of light weight and good heat preservation effect, and if the ceramsite concrete is applied to actual engineering, the ceramsite concrete not only can effectively reduce the self weight of a structure and reduce the manufacturing cost of a foundation, but also has the advantages of heat preservation, heat insulation, energy conservation, environmental protection and the like, and is a green material with good development prospect.
At present, most of ceramsite products applied to China comprise fly ash ceramsite, clay ceramsite, coal gangue ceramsite and the like, which are mostly solid waste recycled materials, are limited by raw materials and sintering processes, and have the problems of low strength, high porosity, insufficient durability and the like. In recent years, with the development of the ceramsite firing process, high-performance ceramsite appears, the strength of the ceramsite is improved by 20-40% compared with that of the common ceramsite, the porosity of the ceramsite can be reduced by 30-50%, the ceramsite can be widely applied to the fields of ceramsite concrete, pavement paving materials, building heat insulation materials and the like, but the ceramsite is limited by the performance requirements of raw materials, and the proportion of the domestic high-performance ceramsite in the total ceramsite yield is less than 10%. If technical means can be adopted, the strength of the common ceramsite is improved, the surface porosity of the ceramsite is reduced, the interface performance and the durability are improved, the performance of the ceramsite reaches or even exceeds that of the high-performance ceramsite, the application field of the common ceramsite is greatly expanded, and the additional value of solid waste ceramsite products is improved.
Therefore, a novel interface treatment method capable of improving the strength and the interface performance of the light ceramsite, reducing the porosity of the ceramsite and improving the durability is developed, the performance of the light ceramsite can be effectively improved, the popularization and the application of the light ceramsite are promoted, and the method has important practical significance for promoting the environmental protection of China and realizing the sustainable development.
Disclosure of Invention
The invention aims to treat the interface of the light ceramsite, overcomes the problems of low strength, poor interface bonding performance and poor durability of the conventional light ceramsite, expands the application field of the light ceramsite and reduces the environmental pollution.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a light ceramsite interface treatment method comprises the following steps:
(1) After the surface of the light ceramsite is cleaned, the light ceramsite is wrapped by a steel wire mesh to form a porous filter bed, namely a light ceramsite filter bed;
(2) Selecting inorganic superfine powder with smooth surface, fluidizing the inorganic superfine powder with high-pressure air, and then passing through the light ceramsite filter bed in the step (1) to ensure that the inorganic superfine powder permeates into the ceramsite micropores (in order to ensure the smooth permeation of the inorganic superfine powder, the aperture of a steel wire mesh is not smaller than the particle size of the inorganic superfine powder);
(3) And (3) surface treatment of a permeable interface treating agent: spraying the surface of the ceramsite treated in the step (2) by adopting a permeable interface treating agent to enable the surface of the ceramsite to be uniformly adhered with the interface treating agent, and then drying (preferably drying in an indoor natural state);
(4) Surface treatment of film-forming enclosed interfacial agent: and (4) adopting a phenyl silicone resin surface sealing agent to perform surface spraying, curing and sieving on the ceramsite subjected to the interface treatment in the step (3).
Further, the light ceramsite in the step (1) is shale ceramsite, fly ash ceramsite, clay ceramsite or coal gangue ceramsite, and the equivalent diameter of the light ceramsite is 5-30 mm.
Furthermore, the inorganic superfine powder is nano silicon dioxide with the particle sphericity of more than 0.7 and the particle diameter of 1-40 nm.
Further, the light-weight ceramsite in the step (1) is shale ceramsite with the density grade of 800 and the cylinder pressure strength of more than 6 MPa.
Further, in the step (2), the inorganic ultrafine powder with different particle sizes can be selected, and is divided into a plurality of grades according to the particle size (the smaller the particle size is), and then the inorganic ultrafine powder is fluidized by high-pressure air from small to large according to the grades and then passes through the light ceramsite filter bed in the step (1).
Preferably, the specific operation of step (2) is: fluidizing inorganic ultrafine powder from small to large according to particle size grades by adopting high-pressure air of a manual sand blasting machine, and then passing the fluidized inorganic ultrafine powder through the light ceramsite filter bed in the step (1), wherein the mass ratio of the inorganic ultrafine powder to the light ceramsite in each particle size grade is 1 (1-5); in the process, the direction of fluidized silicon dioxide powder passing through the light ceramsite filter bed is adjusted, so that inorganic superfine powder permeates into the ceramsite micropores and gradually fills up the micropores on the surface of the ceramsite, the falling inorganic superfine powder is collected and continuously used until the quality of the inorganic superfine powder continuously falling for several times is unchanged, and then high-pressure air fluidization operation of the inorganic superfine powder with the next particle size grade is carried out.
More preferably, the inorganic ultrafine powder having a particle size of 1 to 40nm is selected in the step (2), and is classified into four grades, i.e., 1 to 10nm,11 to 20nm,21 to 30nm, and 31 to 40nm, according to the particle size.
Further, the penetrating interface treating agent in the step (3) is polydimethylsiloxane, an EVA emulsion, an epoxy resin or an acrylic emulsion, and is preferably polydimethylsiloxane.
Further, the phenyl silicone surface blocking agent in the step (4) is methyl phenyl silicone, diphenyl dimethoxy silane or phenyl trimethoxy silane, and is preferably methyl phenyl silicone.
Further, when the surface spraying is carried out in the step (3), the spraying angle is 30-50 degrees, the flow rate is 80-100L/min, the spraying time is 1-4 times for 30s each time, the drying is carried out for 12-24 h at room temperature for each time of spraying, and then the next spraying is carried out;
further, when the surface spraying is carried out in the step (4), the spraying angle is 30-50 degrees, the flow rate is 80-100L/min, the spraying time is 2-3 times for 30s each time, the treated ceramsite is spread in a tray provided with an iron wire screen after each spraying, the tray is placed in a drying oven at 120-150 ℃ for curing for 2-5h, and then the spraying is carried out again.
More preferably: and (3) spraying at an angle of 45 degrees and a flow rate of 95L/min for 30s each time, spraying for 2-3 times each time, drying at room temperature for 12h each time.
Further, in the step (4), the spraying angle is 45 degrees, the flow rate is 95L/min, the spraying frequency is 2-3 times, spraying is carried out for 30s each time, the spraying and stirring are carried out while the treatment liquid is uniformly wetted to the ceramsite, the treated ceramsite is laid in a tray provided with an iron wire screen after each spraying, the tray is placed in a drying oven at the temperature of 140 ℃ for curing for 3h, and then spraying is carried out again.
By adopting the technical scheme, the invention has the following advantages:
1) The source of the light ceramsite raw material is expanded. The ceramsite raw material source is wide, and after the ceramsite is treated by the technology, the strength of the light ceramsite and the interfacial bonding force between the light ceramsite and a cementing material can be effectively improved, and the porosity is reduced.
2) High strength and good wear resistance. The porous structure of the ceramsite is filled with the powder with different particle size grades, and the ceramsite is sprayed and permeated by adopting the permeation interface treating agent, so that a hard shell structure is formed on the surface of the ceramsite, the inorganic ultrafine powder is encapsulated in the ceramsite, and the strength and the wear resistance of the ceramsite are effectively improved.
3) The interface bonding force is strong. The light ceramsite after interface treatment is sprayed by adopting the phenyl silicone resin surface sealant, so that the light ceramsite can form strong interface binding force with a building cementing material in subsequent use.
4) Low porosity and high durability. The superfine powder with different particle size distributions is adopted to fill pores on the surface of the light ceramsite, and the pores are reinforced by a permeable interface treating agent, so that the porosity of the light ceramsite is reduced, and the durability of the light ceramsite is improved.
5) The application is wide, and the energy and the material are saved. The light ceramsite treated by the method can be widely applied to the fields of large-span bridges, fabricated buildings and the like, and the performance of the light ceramsite is obviously superior to that of common ceramsite.
Drawings
FIG. 1 is a schematic view of using inorganic ultrafine powder to fill up pores on the surface of ceramsite in step 3) in examples 1-4.
FIG. 2 is a schematic diagram of a steel wire mesh used for wrapping ceramsite in example 1-4 and a schematic diagram of the wrapping state; wherein the equivalent diameter of the steel wire is 0.4-1 mm, the steel wire is wrapped by 1-2 layers, the side length of the mesh of the filter bed formed after the wrapping is 3mm, the side length of the filter bed is 300mm, and the height of the filter bed is 60mm.
Detailed Description
For a better understanding of the present invention, the following examples are included to further illustrate the present invention, but the present invention is not limited to the following examples.
The molecular weight of polydimethylsiloxane, the penetrating interface treatment used in the examples below, was 236.534.
The surface-blocking agent methylphenylsilicone resin used in the following examples had a density of 1.07g/cm3 at room temperature (25 ℃ C., the same applies hereinafter), a viscosity of 40 mPas and a solid content of 60%.
Example 1:
a light ceramsite interface treatment method comprises the following steps:
(1) Selecting shale ceramisite for screening, selecting shale ceramisite with equivalent diameter of 5-30 mm, density grade of 800 and cylinder pressure strength of 6.1MPa, purging and cleaning dust on the surface of the light ceramisite by using compressed air, collecting and recovering the purged dust, and using the purged dust as soilless foundation bed material and water filtering material in agriculture and gardens;
(2) Inorganic superfine powder is selected to fill up micropores on the surface of the ceramsite:
1) Inorganic superfine powder nano silicon dioxide with smooth surface is selected, the sphericity of particles is more than 0.7, the particle size is 1-40 nm, and the inorganic superfine powder nano silicon dioxide is divided into four particle size grades, namely 1-10nm, 11-20nm, 21-30 nm and 31-40 nm.
2) Wrapping the shale ceramsite cleaned in the step (1) into a box shape by using a steel wire mesh, wherein the wrapped structure is shown in a figure 2, and forming a porous light ceramsite filter bed;
3) Fluidizing the inorganic ultrafine powder nano silicon dioxide obtained in the step 1) by adopting a manual sand blasting machine with high-pressure air according to the particle size grades from small to large, and then passing through the light ceramsite filter bed obtained in the step 2), wherein the mass ratio of the inorganic ultrafine powder to the light ceramsite in each particle size grade is 1; in the process, the direction of fluidized silicon dioxide powder passing through a light ceramsite filter bed is adjusted, so that inorganic superfine powder permeates into micropores of the ceramsite, the micropores on the surface of the ceramsite are gradually filled, the falling inorganic superfine powder is collected and continuously used until the quality of the falling superfine powder is unchanged for a plurality of times continuously, and then the fluidization operation of high-pressure air of the inorganic superfine powder with the next particle size grade is carried out;
(3) And (3) surface treatment of a permeable interface treating agent: spraying polydimethylsiloxane serving as a permeable interface treating agent on the surface of the ceramsite treated in the step (2), wherein the spraying flow is 95L/min, the spraying angle is 45 degrees, spraying is carried out for 30s every time, the spraying frequency is 2 times, the spraying is carried out once every time, the surface of the ceramsite is dried for 12 hours at room temperature (25 ℃, the same applies below), then, the next spraying is carried out, so that the interface treating agent is uniformly adhered to the surface of the ceramsite, and finally, the treated ceramsite is dried in a natural indoor state;
(4) Surface treatment of film-forming enclosed interfacial agent: spraying the surface of the ceramsite subjected to interface treatment in the step (3) by using a surface sealant methyl phenyl silicone resin as a treatment liquid, stirring while spraying to enable the treatment liquid to uniformly wet the ceramsite, wherein the spraying angle is 45 degrees, the spraying time is 30s each time, the flow rate is 95L/min, the spraying frequency is 2 times, after each spraying, the treated ceramsite is spread in a tray provided with an iron wire screen, and is placed in a drying oven at the temperature of 140 ℃ for curing for 3h, and then the next spraying is carried out; after the second curing is completed, sieving the surface-modified shale ceramsite, and removing the ceramsite which are bonded into a lump to obtain the interface-treated light shale ceramsite, wherein the performances of the interface-treated light shale ceramsite are shown in Table 1.
Example 2:
a light ceramsite interface treatment method comprises the following steps:
(1) Selecting shale ceramisite for screening, selecting shale ceramisite with equivalent diameter of 5-30 mm, density grade of 800 and cylinder pressure strength of 6.1MPa, purging and cleaning dust on the surface of the light ceramisite by using compressed air, collecting and recovering the purged dust, and using the purged dust as soilless foundation bed material and water filtering material in agriculture and gardens;
(2) Inorganic superfine powder is selected to fill up micropores on the surface of the ceramsite:
1) Selecting inorganic superfine powder nano silicon dioxide with smooth surface, wherein the sphericity of particles is more than 0.7, the particle size of the inorganic superfine powder nano silicon dioxide is 1-40 nm, and the inorganic superfine powder nano silicon dioxide is divided into four particle size grades, namely 1-10nm, 11-20nm, 21-30 nm and 31-40 nm;
2) Wrapping the shale ceramisite cleaned in the step (1) into a box shape by using a steel wire mesh, wherein the wrapped structure is shown in figure 2, and forming a porous light ceramisite filter bed;
3) Fluidizing the inorganic ultrafine powder nano-silica in the step 1) by adopting a manual sand blasting machine with high-pressure air according to the particle size grades from small to large, and then passing through the light ceramsite filter bed in the step 2), wherein the mass ratio of the inorganic ultrafine powder to the light ceramsite of each particle size grade is 1; in the process, the direction of fluidized silicon dioxide powder passing through a light ceramsite filter bed is adjusted, so that inorganic superfine powder permeates into the micropores of the ceramsite, the micropores on the surface of the ceramsite are gradually filled, the falling inorganic superfine powder is collected and continuously used until the quality of the continuously falling superfine powder is unchanged for several times, and then the high-pressure air fluidization operation of the inorganic superfine powder with the next particle size grade is carried out;
(3) Surface treatment of the permeable interface treating agent: spraying polydimethylsiloxane serving as a permeable interface treating agent on the surface of the ceramsite treated in the step (2), wherein the spraying flow is 95L/min, the spraying angle is 45 degrees, the spraying time is 2 times, the spraying is performed once every time for 30s, the surface of the ceramsite is dried for 12 hours at room temperature, then the next spraying is performed, so that the interface treating agent is uniformly adhered to the surface of the ceramsite, and finally, the treated ceramsite is dried in a natural indoor state;
(4) Surface treatment of film-forming enclosed interfacial agent: spraying the surface of the ceramsite subjected to interface treatment in the step (3) by using a surface sealant methyl phenyl silicone resin as a treatment liquid, stirring while spraying to enable the treatment liquid to uniformly wet the ceramsite, wherein the spraying angle is 45 degrees, the spraying time is 30s each time, the flow rate is 95L/min, the spraying frequency is 3 times, and the ceramsite is cured after being sprayed and then sprayed and cured; after each spraying, the treated ceramsite is laid in a tray provided with an iron wire screen, placed in a drying oven at 140 ℃ for curing for 3 hours, and then the next spraying is carried out; after the third curing is completed, sieving the surface-modified shale ceramsite, and removing the ceramsite which are bonded into a lump to obtain the interface-treated light shale ceramsite, wherein the performances of the interface-treated light shale ceramsite are shown in table 1.
Example 3:
a light ceramsite interface treatment method comprises the following steps:
(1) Selecting shale ceramisite for screening, selecting shale ceramisite with equivalent diameter of 5-30 mm, density grade of 800, cylinder pressure strength of 6.1MPa, purging and cleaning dust on the surface of the light ceramisite by using compressed air, collecting purged dust, and recovering the purged dust to be used as a soilless foundation bed material and a water filtering material in agriculture and gardens;
(2) Inorganic superfine powder is selected to fill up micropores on the surface of the ceramsite:
1) Inorganic superfine powder nano silicon dioxide with smooth surface is selected, the particle sphericity is more than 0.7, the particle size is 1-40 nm, and the four particle size grades are 1-10nm, 11-20nm, 21-30 nm and 31-40 nm respectively.
2) Wrapping the shale ceramsite cleaned in the step (1) into a box shape by using a steel wire mesh, wherein the wrapped structure is shown in a figure 2, and forming a porous light ceramsite filter bed;
3) Fluidizing the inorganic ultrafine powder nano-silica obtained in the step 1) by adopting a manual sand blasting machine with high-pressure air according to the particle size grades from small to large, and then passing through the light ceramsite filter bed obtained in the step 2), wherein the mass ratio of the inorganic ultrafine powder to the light ceramsite in each particle size grade is 1; in the process, the direction of fluidized silicon dioxide powder passing through a light ceramsite filter bed is adjusted, so that inorganic superfine powder permeates into micropores of the ceramsite, the micropores on the surface of the ceramsite are gradually filled, the falling inorganic superfine powder is collected and continuously used until the quality of the falling superfine powder is unchanged for a plurality of times continuously, and then the fluidization operation of high-pressure air of the inorganic superfine powder with the next particle size grade is carried out;
(3) And (3) surface treatment of a permeable interface treating agent: spraying polydimethylsiloxane serving as a permeable interface treating agent on the surface of the ceramsite treated in the step (2), wherein the spraying flow is 95L/min, the spraying angle is 45 degrees, the spraying time is 3 times, the spraying is performed once every time for 30s, the surface of the ceramsite is dried for 12 hours at room temperature, then the next spraying is performed, so that the interface treating agent is uniformly adhered to the surface of the ceramsite, and finally, the treated ceramsite is dried in a natural indoor state;
(4) Surface treatment of film-forming enclosed interfacial agent: spraying the surface of the ceramsite subjected to interface treatment in the step (3) by using a surface sealant methyl phenyl silicone resin as a treatment liquid, stirring while spraying to enable the treatment liquid to uniformly wet the ceramsite, wherein the spraying angle is 45 degrees, the spraying time is 30 seconds, the flow rate is 95L/min, the spraying frequency is 2 times, curing is performed after spraying, and then spraying and curing are performed; after each spraying, spreading the treated ceramsite in a tray provided with an iron wire screen, placing the tray in a drying oven at 140 ℃ for curing for 3 hours, and then spraying the ceramsite for the next time; after the second curing is completed, sieving the surface-modified shale ceramsite, and removing the ceramsite which are bonded into a lump to obtain the interface-treated light shale ceramsite, wherein the performances of the interface-treated light shale ceramsite are shown in Table 1.
Example 4:
a light ceramsite interface treatment method comprises the following steps:
(1) Selecting shale ceramisite for screening, selecting shale ceramisite with equivalent diameter of 5-30 mm, density grade of 800 and cylinder pressure strength of 6.1MPa, blowing and cleaning dust on the surface of the light ceramisite by using compressed air, collecting and recovering the blown dust in a centralized manner, and using the blown dust as soilless foundation bed material and water filtering material in agriculture and gardens;
(2) Inorganic superfine powder is selected to fill up micropores on the surface of the ceramsite:
1) Inorganic superfine powder nano silicon dioxide with smooth surface is selected, the sphericity of the particles is more than 0.7, the particle size of the inorganic superfine powder nano silicon dioxide is 1-40 nm, and the inorganic superfine powder nano silicon dioxide is divided into four particle size grades, namely 1-10nm, 11-20nm, 21-30 nm and 31-40 nm.
2) Wrapping the shale ceramsite cleaned in the step (1) into a box shape by using a steel wire mesh, wherein the wrapped structure is shown in a figure 2, and forming a porous light ceramsite filter bed;
3) Fluidizing the inorganic ultrafine powder nano-silica obtained in the step 1) by adopting a manual sand blasting machine with high-pressure air according to the particle size grades from small to large, and then passing through the light ceramsite filter bed obtained in the step 2), wherein the mass ratio of the inorganic ultrafine powder to the light ceramsite in each particle size grade is 1; in the process, the direction of fluidized silicon dioxide powder passing through a light ceramsite filter bed is adjusted, so that inorganic superfine powder permeates into the micropores of the ceramsite, the micropores on the surface of the ceramsite are gradually filled, the falling inorganic superfine powder is collected and continuously used until the quality of the continuously falling superfine powder is unchanged for several times, and then the high-pressure air fluidization operation of the inorganic superfine powder with the next particle size grade is carried out;
(3) Surface treatment of the permeable interface treating agent: spraying the surface of the ceramsite treated in the step (2) by adopting a permeable interface treating agent polydimethylsiloxane, wherein the spraying flow is 95L/min, the spraying angle is 45 degrees, the spraying time is 3 times, each spraying is carried out for 30s, the surface of the ceramsite is dried for 12 hours at room temperature, then the next spraying is carried out, so that the interface treating agent is uniformly adhered to the surface of the ceramsite, and finally, the treated ceramsite is dried in a natural indoor state;
(4) Surface treatment of film-forming enclosed interfacial agent: spraying the surface of the ceramsite subjected to interface treatment in the step (3) by using a surface sealant methyl phenyl silicone resin as a treatment liquid, stirring while spraying to enable the treatment liquid to uniformly wet the ceramsite, wherein the spraying angle is 45 degrees, the spraying time is 30s each time, the flow rate is 95L/min, the spraying frequency is 3 times, after each spraying, the treated ceramsite is spread in a tray provided with an iron wire screen, and is placed in a drying oven at 140 ℃ for curing for 3h, and then the next spraying is carried out; after the third curing, sieving the surface-modified shale ceramisite, and removing the ceramisites which are bonded into a lump to obtain the interface-treated light shale ceramisite, wherein the properties of the interface-treated light shale ceramisite are shown in table 1.
TABLE 1 untreated and treated lightweight ceramsite Properties
Remarking:
the cylinder pressure strength, dry apparent density and water absorption of 1h are determined according to the standard lightweight aggregate and test method part 2: the determination of the test method for lightweight aggregate GB/T17431.2-2010.
The carbonization depth value is measured according to DBJT13-71-2015 of technical Specification for testing the compressive strength of concrete by a rebound method.
The compressive strength after being mixed with the concrete is measured according to the standard GB/T50082-2009 test method Standard for the long-term performance and the durability of common concrete.
Claims (6)
1. A light ceramsite interface treatment method comprises the following steps:
(1) After the surface of the light ceramsite is cleaned, the light ceramsite is wrapped by a steel wire mesh to form a porous filter bed, namely the light ceramsite filter bed;
(2) Selecting inorganic superfine powder with a smooth surface, fluidizing the inorganic superfine powder by adopting high-pressure air, and then passing through the light ceramsite filter bed in the step (1) to ensure that the inorganic superfine powder permeates into the micropores of the ceramsite;
(3) And (3) surface treatment of a permeable interface treating agent: spraying a permeable interface treating agent on the surface of the ceramsite treated in the step (2) to enable the surface of the ceramsite to be uniformly adhered with the interface treating agent, and then drying;
(4) Surface treatment of film-forming enclosed interfacial agent: spraying the ceramsite subjected to interface treatment in the step (3) by adopting a phenyl silicone resin surface sealing agent, curing and sieving to obtain light ceramsite subjected to interface treatment;
in the step (2), the inorganic superfine powder is nano silicon dioxide with the particle sphericity of more than 0.7 and the particle diameter of 1 to 40nm;
and (3) selecting inorganic ultrafine powder with different particle sizes from the inorganic ultrafine powder in the step (2), dividing the inorganic ultrafine powder into a plurality of grades according to the particle sizes, wherein the grade with the smaller particle size is smaller, and fluidizing the inorganic ultrafine powder by adopting high-pressure air according to the grades from small to large, and then passing the inorganic ultrafine powder through the light ceramsite filter bed in the step (1).
2. The treatment method according to claim 1, wherein the light ceramsite in the step (1) is shale ceramsite, fly ash ceramsite, clay ceramsite or coal gangue ceramsite, and the equivalent diameter of the light ceramsite is 5-30mm.
3. The method according to claim 1, wherein the penetrating interface treating agent in the step (3) is polydimethylsiloxane, EVA emulsion, epoxy resin or acrylic emulsion.
4. The treatment method according to claim 1, wherein the phenylsilicone surface blocking agent in the step (4) is methylphenylsilicone, diphenyldimethoxysilane or phenyltrimethoxysilane.
5. The processing method according to claim 1, wherein when the surface is sprayed in the step (3), the spraying angle is 30 to 50 °, the flow rate is 80 to 100L/min, the spraying time is 1 to 4 times for 30s each time, the surface is dried at room temperature for 12 to 24h each time, and then the next spraying is performed.
6. The treatment method as claimed in claim 1, wherein when the surface spraying in the step (4) is carried out, the spraying angle is 30 to 50 degrees, the flow rate is 80 to 100L/min, 30s of spraying is carried out each time, the spraying frequency is 2 to 3 times, the treated ceramsite is spread in a tray provided with an iron wire screen after each spraying, the tray is placed in an oven at 120 to 150 ℃ for curing for 2 to 5 hours, and then the spraying is carried out again.
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