CN113024223B - Ultrathin flexible cement decorative plate and preparation method thereof - Google Patents

Abstract

The application relates to the technical field of building materials, and particularly discloses an ultrathin flexible cement decorative plate and a preparation method thereof. An ultrathin flexible cement decorative plate comprises a plate body and a plurality of alkali-free gridding cloths, wherein the upper surface of the plate body is in a texture color, a single alkali-free gridding cloth is horizontally embedded in the plate body, and the alkali-free gridding cloths are distributed along the height direction of the plate body; the plate body comprises the following raw materials in parts by weight: 5-10 parts of cement; 10-20 parts of fine sand; 0.1-0.3 part of short fiber; 0.2-0.5 part of filler; 10-20 parts of magnesium oxide; 1-5 parts of magnesium chloride; 4.5-22.5 parts of polyvinyl alcohol; 5-10 parts of fly ash; 0.1-0.5 part of water reducing agent. The application discloses ultra-thin flexible cement decorative board has the pliability good, and the good advantage of water-proof effects.

Description

Ultrathin flexible cement decorative plate and preparation method thereof

Technical Field

The application relates to the technical field of building materials, in particular to an ultrathin flexible cement decorative plate and a preparation method thereof.

Background

The wood-like production process is greatly improved through the diligent research of people, overcomes the technical problems of long-term corrosion, easy oxidation and the like, and can develop, design and manufacture various materials and small products for decoration application. Is an excellent substitute of wood, and the wood imitation has become the mainstream of decoration at present when wood resources in China are extremely poor.

The ultrathin flexible cement decorative plate is a common decoration, is also called a lap plate, and is a fiber cement plate with decorative high-temperature and high-pressure steaming treatment. In the prior art, the main components of the cement decorative plate are cement, fiber and other mineral substances. For example, the Chinese patent with publication number CN102102428A discloses a method for manufacturing a deep wood grain fireproof decorative board, the method adopts magnesite cement material as main solidification binder material, the filling material adopts low-cost fine river sand, the mould adopts a glass fiber reinforced plastic and organic silicon rubber mixed mould, and the depth of the wood grain of the product can reach 4 mm; for another example, the chinese patent publication No. CN104890099A discloses a method for manufacturing a cement prefabricated product with simulated wood grain texture, which comprises the following steps of extracting a manufacturing mold through a wood grain texture surface by using silica gel; manufacturing a high-strength impermeable cement concrete layer; the method is characterized in that: when the cement concrete layer is not dried, the wood grain texture mould shaped by silica gel is shaped on the cement concrete layer through pressure or vibration by a machine or a person, and the wood grain texture is shaped on the cement concrete layer, and the wood grain-like cement concrete layer is naturally dried or is dried by heating in a shade.

However, the ultrathin cement decorative board produced by the above-described technique is too hard and brittle, lacks flexibility, and has a problem that the cement decorative board is easily broken during transportation or mounting.

Disclosure of Invention

In order to improve the bending toughness of the cement decorative plate, the application provides an ultrathin flexible cement decorative plate and a preparation method thereof.

First aspect, the application provides an ultra-thin flexible cement decorative board, adopts following technical scheme:

an ultrathin flexible cement decorative plate comprises a plate body and a plurality of alkali-free gridding cloths, wherein the upper surface of the plate body is in a texture color, a single alkali-free gridding cloth is horizontally embedded in the plate body, and the alkali-free gridding cloths are distributed along the height direction of the plate body;

the plate body comprises the following raw materials in parts by weight:

by adopting the technical scheme, the method has the advantages that,

the fine sand is added to play a role of filling the framework, so that the compactness of the decorative plate is improved, and the seepage-proofing capability of the decorative plate is improved; the addition of the short fibers can be easily dispersed in the cement, reduce the drying shrinkage of the cement and improve the bending toughness of the decorative plate; the magnesium chloride and the magnesium oxide are added, the magnesium oxide reacts with water, the magnesium chloride promotes the dissolution and hydration of the magnesium oxide, and a 518 crystal phase network structure is generated, so that the strength of the decorative plate is improved;

the magnesium chloride is an antifreezing agent, so that the decorative plate has excellent low-temperature resistance; the melting point of the magnesium oxide is 2270 ℃, and the magnesium chloride releases chlorine at 118 ℃, so that the fire extinguishing effect is achieved, and the decorative plate has good fireproof performance;

the addition of the polyvinyl alcohol can improve the adhesiveness of the slurry, thereby improving the bending toughness of the decorative plate and simultaneously improving the waterproofness of the decorative plate;

the fly ash is an industrial waste, and by adding the fly ash, a large amount of cement and fine sand are saved, the water consumption is reduced, the workability of slurry is improved, and the hydration heat and thermal expansion are reduced; the anti-permeability capability of the decorative plate is improved; the decorative property is increased;

the water reducing agent is a high-efficiency surfactant and is an additive for shortening the setting time of a mixture and improving the early strength of cement.

Optionally, the filling is one or more of wood chips, rice sugar and wheat bran.

Optionally, the fine sand has a mesh size of 80-100 meshes.

Optionally, the polyvinyl alcohol is inorganic silicon-maleic anhydride grafted polyvinyl alcohol.

By adopting the technical scheme, the polyvinyl alcohol is inorganic silicon-maleic anhydride grafted polyvinyl alcohol, and the adhesive property of the cement can be further improved, so that the bending toughness and the waterproof performance of the decorative plate are improved.

Optionally, the thickness of the plate body is 2-4 mm.

Through adopting above-mentioned technical scheme, the thickness of control plate body to reduce the weight of plate body, thereby make things convenient for the plate body to be under construction the installation.

Optionally, a transparent concrete protective agent is arranged on one side of the plate body, which is far away from the side of the plate body, which is in a texture color.

By adopting the technical scheme, the waterproof mechanism of the transparent concrete protective agent is that the transparent concrete protective agent and free alkali in cement generate chemical reaction to generate stable dendritic crystal colloid, and the stable dendritic crystal colloid can effectively block micro cracks and capillary gaps in the decorative plate, so that the cement plate has a durable waterproof function and better compactness and compressive strength.

In a second aspect, the application provides a preparation method of an ultrathin flexible cement decorative plate, which adopts the following technical scheme:

a preparation method of an ultrathin flexible cement decorative plate comprises the following steps:

s1, preparing a water mixing and stirring agent:

s11, adding water into magnesium chloride to prepare brine with salinity of 22-25 degrees Be;

s12, adding the color paste, stirring uniformly, adding polyvinyl alcohol, and stirring uniformly to obtain a mixing and stirring agent;

s2, preparation of mortar:

sequentially premixing cement, magnesium oxide, fine sand, a water reducing agent, fly ash and short fibers according to a proportion, and stirring for 15-25min to obtain mortar;

s3, mixing the water mixing and stirring agent with the mortar, and stirring for 5-8min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth on the surface of the composite slurry, rolling until the alkali-free mesh cloth is completely soaked and coated by the composite slurry, repeating the steps to a specified thickness, covering a film, and drying at 30-35 ℃ in the air to obtain a bottom tire blank with one surface being a texture pattern.

By adopting the technical scheme, the water mixing and stirring agent is prepared firstly, then the water mixing and stirring agent is mixed with the slurry, and the decorative plate with a certain thickness is prepared according to the requirement, so that the decorative plate has good bending toughness and waterproofness.

Optionally, in step S2, 0.5 to 2 parts of micro silicon powder is further added.

Through adopting above-mentioned technical scheme, the addition of little silica flour can reduce the bubble in the thick liquids for closely knit nature is good, bubble-free in the decorative board, can improve the bending toughness and the intensity of decorative board simultaneously, prevents that the decorative board from whiskering, improves the mobility of thick liquids, thereby the thick liquids of being convenient for are shaping in first mould and second mould.

Optionally, in the step S3, the weight ratio of the water mixing and stirring agent to the mortar is 3 (6-8).

Through adopting above-mentioned technical scheme, this application is mixed and is stirred water agent and mortar with 3: (6-8) so that the resulting decorative sheet has good water resistance and bending toughness.

Optionally, after step S4, the method further includes:

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

By adopting the technical scheme, the waterproof mechanism of the transparent concrete protective agent is that the transparent concrete protective agent and free alkali in cement generate chemical reaction to generate stable dendritic crystal colloid, and the stable dendritic crystal colloid can effectively block micro cracks and capillary gaps in the decorative plate, so that the cement plate has a durable waterproof function and better compactness and compressive strength.

Optionally, after step S4, the method further includes:

s5, placing the bottom blank body into a second mold, attaching the side of the bottom blank body with the texture pattern to the bottom wall of the second mold, and repeating the step S4 to obtain the finished product with the double-sided texture pattern.

By adopting the technical scheme, the two sides of the decorative plate manufactured in the step S5 are provided with texture patterns, the application field of the decorative plate is increased, and the application range of the decorative plate is improved.

In summary, the present application has the following beneficial effects:

1. the addition of the polyvinyl alcohol can improve the adhesiveness of the slurry, thereby improving the bending toughness of the decorative plate and simultaneously improving the water resistance and the alkali efflorescence resistance of the decorative plate.

2. In the application, the polyvinyl alcohol is preferably inorganic silicon-maleic anhydride grafted polyvinyl alcohol, so that the adhesive property of the cement can be further improved, and the bending toughness and the waterproof performance of the decorative plate are improved.

3. The preferred silica fume in this application, through the addition of silica fume, can reduce the bubble in the thick liquids for closely knit nature is good, bubble-free in the decorative board, can improve the bending toughness and the intensity of decorative board simultaneously, prevents that the decorative board from becoming saltpeter, improves the mobility of thick liquids, thereby the thick liquids of being convenient for are shaping in first mould and second mould.

Drawings

FIG. 1 is a schematic view of a single-sided textured color decorated sheet according to the present application;

fig. 2 is a schematic structural diagram of a decorative board with double-sided texture color in the application.

Description of reference numerals: 1. a plate body; 2. alkali-free mesh cloth; 3. texture color; 4. transparent concrete protective layer.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples.

The ultrathin flexible cement decorative plate is divided into a cement decorative plate with single-side texture color 3 and a cement decorative plate with double-side texture color 3, and the height of the cement decorative plate with the single-side texture color 3 and the height of the cement decorative plate with the double-side texture color 3 are any numerical value within 2-4 mm.

As shown in fig. 1, the cement decorative board with single-side texture color 3 comprises a board body 1, a plurality of alkali-free gridding cloths 2 and a transparent concrete protective layer 4, wherein the alkali-free gridding cloths 2 are horizontally laid in the board body 1, the alkali-free gridding cloths 2 are uniformly distributed along the height direction of the board body 1, the upper surface of the board body 1 is provided with the texture color 3, the transparent concrete protective layer 4 is sprayed on the lower surface of the board body 1, and the transparent concrete protective layer 4 is formed after a transparent concrete protective agent is cooled.

As shown in fig. 2, the cement decorative board with double-sided texture color 3 comprises a board body 1 and a plurality of alkali-free gridding cloth 2, wherein the alkali-free gridding cloth 2 is horizontally laid in the board body 1, the alkali-free gridding cloth 2 is uniformly distributed along the height direction of the board body 1, and the upper surface and the lower surface of the board body 1 are both provided with the texture color 3.

The cement decorative board with the single-sided texture color is prepared by adopting the examples 1-12, the hydraulic decorative board with the double-sided texture color is prepared by adopting the examples 13-24, and the raw materials selected in the examples are shown in the table 1:

TABLE 1

Example 1

A preparation method of an ultrathin flexible cement decorative plate comprises the following steps:

s1, preparing a water mixing and stirring agent:

s11, adding 5Kg of magnesium chloride into a stirring tank, adding water while measuring the salinity of the solution by a baume meter, and stopping adding water when the salinity of the solution reaches 22 degrees Be;

s12, adding 0.05Kg of color paste, stirring uniformly, adding 22.5Kg of polyvinyl alcohol, and stirring uniformly to obtain a stirring water agent;

s2, preparation of mortar:

sequentially premixing 10Kg of cement, 20Kg of magnesium oxide, 20Kg of fine sand, 0.5Kg of water reducing agent, 10Kg of fly ash and 0.3Kg of short fiber according to a proportion, and stirring for 15min to prepare mortar;

s3, mixing and stirring the water agent and the mortar according to the mass ratio of 3: 8, mixing and stirring for 5-8min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth on the surface of the composite slurry, rolling until the alkali-free mesh cloth is completely soaked and coated by the composite slurry, repeating the steps until the thickness of the composite slurry is 4mm, covering a film, and air-drying at 30 ℃ to obtain a bottom blank body with one surface being a texture pattern;

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

Example 2

A preparation method of an ultrathin flexible cement decorative plate comprises the following steps:

s1, preparing a water mixing and stirring agent:

s11, adding 1Kg of magnesium chloride into a stirring tank, adding water while measuring the salinity of the solution by a baume meter, and stopping adding water when the salinity of the solution reaches 25 degrees Be;

s12, adding 0.07Kg of color paste, stirring uniformly, adding 4.5Kg of polyvinyl alcohol, and stirring uniformly to obtain a stirring water agent;

s2, preparation of mortar:

premixing 5Kg of cement, 10Kg of magnesium oxide, 10Kg of fine sand, 0.1Kg of water reducing agent, 5Kg of fly ash and 0.1Kg of short fiber in sequence according to a proportion, and stirring for 15min to prepare mortar;

s3, mixing and stirring the water agent and the mortar according to the mass ratio of 3: 6, mixing and stirring for 5min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth on the surface of the composite slurry, rolling until the alkali-free mesh cloth is completely soaked and coated by the composite slurry, repeating the steps until the thickness of the composite slurry is 4mm, covering a film, and air-drying at 30 ℃ to obtain a bottom blank body with one surface being a texture pattern;

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

Example 3

A preparation method of an ultrathin flexible cement decorative plate comprises the following steps:

s1, preparing a water mixing and stirring agent:

s11, adding 3Kg of magnesium chloride into a stirring tank, adding water while measuring the salinity of the solution by a baume meter, and stopping adding water when the salinity of the solution reaches 22 degrees Be;

s12, adding 0.1Kg of color paste, stirring uniformly, adding 13.5Kg of polyvinyl alcohol, and stirring uniformly to obtain a stirring water agent;

s2, preparation of mortar:

sequentially premixing 7.5Kg of cement, 15Kg of magnesium oxide, 15Kg of fine sand, 0.3Kg of water reducing agent, 7.5Kg of fly ash and 0.2Kg of short fiber according to a proportion, and stirring for 20min to prepare the mortar;

s3, mixing and stirring the water agent and the mortar according to the mass ratio of 3: 7, mixing and stirring for 5min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth on the surface of the composite slurry, rolling until the alkali-free mesh cloth is completely soaked and coated by the composite slurry, repeating the steps until the thickness of the composite slurry is 4mm, covering a film, and air-drying at 30 ℃ to obtain a bottom blank body with one surface being a texture pattern;

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

Example 4

A preparation method of an ultrathin flexible cement decorative plate comprises the following steps:

s1, preparing a water mixing and stirring agent:

s11, adding 3Kg of magnesium chloride into a stirring tank, adding water while measuring the salinity of the solution by a baume meter, and stopping adding water when the salinity of the solution reaches 24 degrees Be;

s12, adding 0.1Kg of color paste, stirring uniformly, adding 13.5Kg of polyvinyl alcohol, and stirring uniformly to obtain a stirring water agent;

s2, preparation of mortar:

sequentially premixing 7.5Kg of cement, 15Kg of magnesium oxide, 15Kg of fine sand, 0.3Kg of water reducing agent, 7.5Kg of fly ash and 0.2Kg of short fiber according to a proportion, and stirring for 20min to prepare the mortar;

s3, mixing and stirring the water agent and the mortar according to the mass ratio of 3: 7, mixing and stirring for 6.5min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth on the surface of the composite slurry, rolling until the alkali-free mesh cloth is completely soaked and coated by the composite slurry, repeating the steps until the thickness of the composite slurry is 4mm, covering a thin film, and air-drying at 32.5 ℃ to obtain a bottom blank body with one surface being a texture pattern;

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

Example 5

A preparation method of an ultrathin flexible cement decorative plate comprises the following steps:

s1, preparing a water mixing and stirring agent:

s11, adding 3Kg of magnesium chloride into a stirring tank, adding water while measuring the salinity of the solution by a baume meter, and stopping adding water when the salinity of the solution reaches 25 degrees Be;

s12, adding 0.1Kg of color paste, stirring uniformly, adding 13.5Kg of polyvinyl alcohol, and stirring uniformly to obtain a stirring water agent;

s2, preparation of mortar:

sequentially premixing 7.5Kg of cement, 15Kg of magnesium oxide, 15Kg of fine sand, 0.3Kg of water reducing agent, 7.5Kg of fly ash and 0.2Kg of short fiber according to a proportion, and stirring for 20min to prepare the mortar;

s3, mixing and stirring the water agent and the mortar according to the mass ratio of 3: 7, mixing and stirring for 8min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth on the surface of the composite slurry, rolling until the alkali-free mesh cloth is completely soaked and coated by the composite slurry, repeating the steps until the thickness of the composite slurry is 4mm, covering a film, and air-drying at 35 ℃ to obtain a bottom blank body with one surface being a texture pattern;

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

Example 6

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 3 in that 0.5Kg of silica fume is also added in the step S2.

Example 7

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 3 in that 1Kg of silica fume is also added in the step S2.

Example 8

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 3 in that 1.5Kg of silica fume is also added in the step S2.

Example 9

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 3 in that 2Kg of silica fume is also added in the step S2.

Example 10

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 1 in that the polyvinyl alcohol in the step S12 is inorganic silicon-maleic anhydride grafted polyvinyl alcohol.

Example 11

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 2 in that the polyvinyl alcohol in the step S12 is inorganic silicon-maleic anhydride grafted polyvinyl alcohol.

Example 12

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the embodiment 3 in that the polyvinyl alcohol in the step S12 is inorganic silicon-maleic anhydride grafted polyvinyl alcohol.

Examples 13 to 24

The preparation method of the ultrathin flexible cement decorative plate is different from the preparation method of the concrete decorative plate in the embodiments 1 to 12,

the thickness of the composite slurry in the step S4 is 2 mm;

step S5 is replaced with: and (5) placing the bottom blank body into a second mould, attaching one side of the bottom blank body with the texture pattern to the bottom wall of the second mould, and repeating the step S4 to obtain a finished product with the double-sided texture pattern.

Comparative example 1

The invention discloses a cement decorative board, which is prepared by the production steps recorded in a method for manufacturing a wood grain texture imitating cement prefabricated product disclosed in the Chinese patent with the publication number of CN 104890099A.

Comparative example 2

The preparation method of the cement decorative plate comprises the following steps:

s1, sequentially premixing cement, magnesium oxide, fine sand, a water reducing agent, fly ash and short fibers according to a proportion, and stirring for 15-25min to obtain mortar;

s2, spraying a layer of mortar in the first mold, laying a layer of alkali-free grid cloth on the surface of the composite slurry, rolling until the alkali-free grid cloth is completely soaked and coated by the mortar, repeating the steps until the thickness of the mortar is 4mm, covering a film, and air-drying at 30 ℃ to obtain the cement decorative plate.

Comparative example 3

The preparation method of the cement decorative plate comprises the following steps:

s1, sequentially premixing cement, magnesium oxide, micro silicon powder, fine sand, a water reducing agent, fly ash and short fibers in proportion, and stirring for 15min to obtain mortar;

s2, spraying a layer of mortar in the first mold, laying a layer of alkali-free grid cloth on the surface of the composite slurry, rolling until the alkali-free grid cloth is completely soaked and coated by the mortar, repeating the steps until the thickness of the mortar is 4mm, covering a film, and air-drying at 30 ℃ to obtain the cement decorative plate. .

Comparative example 4

A method for manufacturing a cement decorative board, which is different from example 3 in that polyvinyl alcohol is not added in step S12.

Performance test

(1) Testing the waterproofness;

the cement decorative boards obtained in examples 1 to 24 and comparative examples 1 to 4 were formed into a circular container and filled with 100ML of water for 60 days, and the water permeation was observed, and the results are shown in table 2;

(2) testing the fire resistance;

the cement decorative boards prepared in examples 1 to 24 and comparative examples 1 to 4 were continuously burned for four hours in the morning, one hour in the noon, four hours in the afternoon, and one hour in the evening on open fire, and thus, the treatment was continuously performed for ten days, and the burned surface condition of the cement decorative boards was observed, and the results are shown in table 2;

(3) weather resistance;

the cement decorative boards obtained in examples 1 to 24 and comparative examples 1 to 4 were left outdoors for 360 days, and the surface condition of the cement decorative boards was observed, and the results are shown in Table 2;

TABLE 2

As can be seen by combining examples 1-24 and comparative example 1 with Table 2, the cement decorative board prepared by the method has better water permeability resistance, fire resistance and weather resistance;

it can be seen from the combination of examples 1 to 24 and comparative example 2 and table 2 that the addition of the water-mixing agent can improve the water permeability resistance, fire resistance and weather resistance of the cement decorative sheet;

it can be seen from the combination of examples 1 to 24 and comparative example 3 and table 2 that the addition of the silica fume can improve the water permeability resistance, fire resistance and weather resistance of the cement decorative board;

it can be seen from the combination of examples 1 to 24 and comparative example 4 and from Table 2 that the addition of polyvinyl alcohol improves the water permeability resistance, fire resistance and weather resistance of the cement decorative board.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (9)

1. The ultrathin flexible cement decorative plate is characterized by comprising a plate body (1) and a plurality of alkali-free grid cloths (2), wherein the upper surface of the plate body (1) is in a texture color (3), a single alkali-free grid cloth (2) is horizontally embedded in the plate body (1), and the alkali-free grid cloths (2) are distributed along the height direction of the plate body (1);

the plate body (1) comprises the following raw materials in parts by weight:

5-10 parts of cement;

10-20 parts of fine sand;

0.1-0.3 part of short fiber;

10-20 parts of magnesium oxide;

1-5 parts of magnesium chloride;

4.5-22.5 parts of polyvinyl alcohol;

5-10 parts of fly ash;

0.1-0.5 part of water reducing agent.

2. The ultra-thin flexible cement decorative board of claim 1, wherein the polyvinyl alcohol is inorganic silicon-maleic anhydride grafted polyvinyl alcohol.

3. An ultra-thin flexible cement decorative board according to claim 1, characterized in that the thickness of the board body (1) is 2-4 mm.

4. An ultra-thin flexible cement decorative board according to claim 1, characterized in that the side of the board body (1) away from the texture color (3) is provided with a transparent concrete protective agent.

5. A method for manufacturing an ultra-thin flexible cement decorative board according to any one of claims 1 to 4, characterized by comprising the steps of:

s1, preparing a water mixing and stirring agent:

s11, adding water into magnesium chloride to prepare brine with salinity of 22-25 degrees Be;

s12, adding the color paste, stirring uniformly, adding polyvinyl alcohol, and stirring uniformly to obtain a mixing and stirring agent;

s2, preparation of mortar:

sequentially premixing cement, magnesium oxide, fine sand, a water reducing agent, fly ash and short fibers according to a proportion, and stirring for 15-25min to obtain mortar;

s3, mixing the water mixing and stirring agent with the mortar, and stirring for 5-8min to obtain composite slurry;

s4, spraying a layer of composite slurry in the first mold, laying a layer of alkali-free mesh cloth (2) on the surface of the composite slurry, rolling until the alkali-free mesh cloth (2) is completely soaked and coated by the composite slurry, repeating the steps to a specified thickness, covering a film, and air-drying at 30-35 ℃ to obtain a bottom blank body with one surface being a texture pattern.

6. The method for manufacturing an ultrathin flexible cement decorative plate as claimed in claim 5, wherein 0.5-2 parts of silica fume is further added in step S2.

7. The method for preparing the ultrathin flexible cement decorative plate according to claim 5 is characterized in that: in the step S3, the weight ratio of the water mixing and stirring agent to the mortar is 3 (6-8).

8. The method for preparing the ultrathin flexible cement decorative plate according to claim 5 is characterized in that: after step S4, the method further includes:

and S5, spraying a transparent concrete protective agent on one side of the blank body of the bottom blank, which is far away from the texture pattern, so as to obtain a finished product with a single-side texture pattern.

9. The method for preparing the ultrathin flexible cement decorative plate according to claim 5 is characterized in that: step S4 is followed by:

s5, placing the bottom blank body into a second mold, attaching the side of the bottom blank body with the texture pattern to the bottom wall of the second mold, and repeating the step S4 to obtain the finished product with the double-sided texture pattern.

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