High-strength cement-based foamed thermal insulation board

Abstract

The application provides a high-strength cement-based foamed thermal insulation board, which comprises an embedded perlite-composite fiber felt layer and an outer foamed cement base body, the perlite-composite fiber felt layer is a composite fiber felt layer impregnated with a perlite micro-powder slurry, the mass ratio of the perlite micro-powder slurry to the composite fiber felt layer is 3-7%, and the mechanical properties of the board are effectively improved through reasonable setting of the structure and raw materials of the cement-based foamed thermal insulation board, the overall foaming is more uniform, the heat preservation property is strong, the comprehensive performance is obviously improved, and the application is worthy of promotion and application.

Description

Technical Field

[0001] This invention relates to the field of cement foam insulation board technology, specifically a high-strength cement-based foam insulation board. Background Technology

[0002] With the continuous development of the construction industry, the demand for thermal insulation materials has further increased, and thermal insulation materials have also developed significantly. However, thermal insulation materials are basically not installed on the exterior walls of existing buildings. In order to change this situation, the Ministry of Construction requires that corresponding measures be adopted on the exterior walls of buildings in some regions of my country to meet and comply with the requirements of energy saving. Existing technologies have poor thermal insulation and waterproof performance, poor thermal insulation effect, and poor flame retardant and fireproof performance.

[0003] Foamed cement insulation board is a Class A fire-resistant insulation material with advantages such as strong adhesion to the substrate and good durability. However, currently available foamed cement insulation boards are brittle, have low flexural strength, are prone to cracking, shed powder excessively, and are small in size. Most manufacturers can only produce smaller sizes such as 300×300mm, 400×400mm, or 300mm×600mm, which not only affects construction efficiency but also makes it difficult to composite into integrated insulation and decorative panels. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a high-strength cement-based foamed insulation board. By rationally setting the structure and optimizing the raw materials of the cement-based foamed insulation board, the mechanical properties of the board are effectively improved, the overall foaming is more uniform, the insulation is stronger, and the comprehensive performance is significantly improved, making it worthy of promotion and application.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-strength cement-based foamed insulation board includes an embedded perlite-composite fiber mesh layer and an outer foamed cement matrix. The perlite-composite fiber mesh layer is a composite fiber mesh impregnated with perlite micro powder emulsion, and the mass ratio of perlite micro powder emulsion to the mass of the composite fiber mesh is 3-7%.

[0007] As a further preferred embodiment of the present invention, the perlite-composite fiber mesh layer has at least two layers with a layer spacing greater than 3 cm.

[0008] As a further preferred embodiment of the present invention, the thickness of the perlite-composite fiber mesh layer is less than 2% of the total thickness of the cement-based foamed insulation board.

[0009] As a further preferred embodiment of the present invention, the perlite micron powder emulsion comprises the following components by weight: 5-10 parts perlite micron powder

[0010] 3-5 parts sodium silicate, 20-30 parts polyvinyl alcohol 400, and 20-50 parts water.

[0011] As a further preferred embodiment of the present invention, the composite fiber web is woven from a blend of asbestos fiber, glass fiber, and steel fiber, with the amounts of the three fibers being 1:0.5-1:0.2-0.3 respectively.

[0012] As a further preferred embodiment of the present invention, the composite fiber mesh has a pore size greater than 3 mm.

[0013] As a further preferred embodiment of the present invention, the method for preparing the perlite-composite fiber mesh is as follows: take raw materials, and prepare perlite micro powder emulsion and composite fiber mesh in sequence; immerse the composite fiber mesh in perlite micro powder emulsion, sonicate at 35-40℃ for 60-120s, remove and dry at 45-65℃; repeat immersion and drying to a suitable mass ratio to obtain the final product.

[0014] The beneficial effects of this invention are as follows: by rationally setting the structure and optimizing the raw materials of the cement-based foamed insulation board, this invention effectively improves the mechanical properties of the board, and the overall foaming is more uniform, with strong thermal insulation and significantly improved comprehensive performance, making it worthy of promotion and application.

[0015] Compared to the previous method of attaching reinforcing fiber mesh to the outer surface of cement-based materials, this application embeds the fiber mesh internally, which not only improves the overall mechanical properties and crack resistance, but also enhances the overall integrity, integration, and internal stress, greatly improving the adaptability of the molding size. Compared to pure cement-based insulation boards without perlite-composite fiber mesh layers, the production size can be increased by 2-3 times while ensuring stable performance.

[0016] The composite fiber mesh acts as a reinforcing skeleton, connecting the cement-based material into a reinforced whole. It is also coated with a specially made perlite micro powder emulsion, which greatly improves the active bonding ability between the skeleton mesh and the cement-based interface, significantly enhances crack resistance, and provides stable compressive and flexural strength. At the same time, it has excellent foaming properties, high rheological uniformity of cement slurry, uniform and dense foaming, and a high-strength and stable overall structure. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1:

[0019] A high-strength cement-based foamed insulation board includes an embedded perlite-composite fiber mesh layer and an outer foamed cement matrix. The perlite-composite fiber mesh layer is a composite fiber mesh impregnated and coated with perlite micro powder emulsion, and the mass ratio of perlite micro powder emulsion is 5% of the mass of the composite fiber mesh.

[0020] The perlite-composite fiber mesh layer consists of two layers with a layer spacing of 3.5 cm. The thickness of the perlite-composite fiber mesh layer accounts for 1% of the total thickness of the cement-based foamed insulation board.

[0021] The perlite micronized powder emulsion comprises the following components by weight: 8 parts perlite micronized powder, 4 parts sodium silicate, 25 parts polyvinyl alcohol (400 g), and 40 parts water.

[0022] The composite fiber web is woven from a blend of asbestos fiber, glass fiber, and steel fiber, with a ratio of 1:0.5:0.2. The mesh size of the composite fiber web is greater than 3mm.

[0023] The preparation method of perlite-composite fiber mesh is as follows: take raw materials, prepare perlite micro powder slurry and composite fiber mesh in sequence; immerse the composite fiber mesh in perlite micro powder slurry, sonicate at 35-40℃ for 60-120s, and then dry at 45-65℃.

[0024] The product is obtained by repeatedly soaking and drying to the appropriate mass ratio.

[0025] Example 2:

[0026] A high-strength cement-based foamed insulation board includes an embedded perlite-composite fiber mesh layer and an outer foamed cement matrix. The perlite-composite fiber mesh layer is a composite fiber mesh impregnated and coated with perlite micro powder emulsion, and the mass ratio of perlite micro powder emulsion is 6% of the mass of the composite fiber mesh.

[0027] The perlite-composite fiber mesh layer consists of two layers with a 4cm spacing between them.

[0028] The thickness of the perlite-composite fiber mesh layer accounts for 1% of the total thickness of the cement-based foamed insulation board.

[0029] The perlite micronized powder emulsion comprises the following components by weight: 10 parts perlite micronized powder, 5 parts sodium silicate, 30 parts polyvinyl alcohol 400, and 30 parts water.

[0030] The composite fiber web is woven from a blend of asbestos fiber, glass fiber, and steel fiber, with a ratio of 1:0.8:0.3. The mesh size of the composite fiber web is greater than 3mm.

[0031] The preparation method of perlite-composite fiber mesh is as follows: take raw materials, prepare perlite micro powder slurry and composite fiber mesh in sequence; immerse the composite fiber mesh in perlite micro powder slurry, sonicate at 35-40℃ for 60-120s, take it out and dry at 45-65℃; repeat immersion and drying to a suitable mass ratio to obtain the final product.

[0032] Example 3:

[0033] A high-strength cement-based foamed insulation board includes an embedded perlite-composite fiber mesh layer and an outer foamed cement matrix. The perlite-composite fiber mesh layer is a composite fiber mesh impregnated and coated with perlite micro powder emulsion, and the mass ratio of perlite micro powder emulsion is 5% of the mass of the composite fiber mesh.

[0034] The perlite-composite fiber mesh layer consists of 3 layers with a layer spacing of 3.5 cm.

[0035] The thickness of the perlite-composite fiber mesh layer accounts for 1.5% of the total thickness of the cement-based foamed insulation board.

[0036] The perlite micronized powder emulsion comprises the following components by weight: 8 parts perlite micronized powder, 3 parts sodium silicate, 20 parts polyvinyl alcohol (400 g / L), and 35 parts water.

[0037] The composite fiber web is woven from a blend of asbestos fiber, glass fiber, and steel fiber, with a ratio of 1:1:0.3. The mesh size of the composite fiber web is greater than 3mm.

[0038] The preparation method of perlite-composite fiber mesh is as follows: take raw materials, prepare perlite micro powder slurry and composite fiber mesh in sequence; immerse the composite fiber mesh in perlite micro powder slurry, sonicate at 35-40℃ for 60-120s, take it out and dry at 45-65℃; repeat immersion and drying to a suitable mass ratio to obtain the final product.

[0039] Example 4:

[0040] A high-strength cement-based foamed insulation board includes an embedded perlite-composite fiber mesh layer and an outer foamed cement matrix. The perlite-composite fiber mesh layer is a composite fiber mesh impregnated with perlite micro powder emulsion, and the mass ratio of perlite micro powder emulsion is 6.4% of the mass of the composite fiber mesh.

[0041] The perlite-composite fiber mesh layer consists of 3 layers with a spacing of 4 cm between the layers.

[0042] The thickness of the perlite-composite fiber mesh layer accounts for 1.5% of the total thickness of the cement-based foamed insulation board.

[0043] The perlite micro powder emulsion comprises the following components by weight: 10 parts perlite micro powder, 5 parts sodium silicate, 30 parts polyvinyl alcohol (400), and 40 parts water.

[0044] The composite fiber web is woven from a blend of asbestos fiber, glass fiber, and steel fiber, with a ratio of 1:0.5:0.3. The mesh size of the composite fiber web is greater than 3mm.

[0045] The preparation method of perlite-composite fiber mesh is as follows: take raw materials, prepare perlite micro powder slurry and composite fiber mesh in sequence; immerse the composite fiber mesh in perlite micro powder slurry, sonicate at 35-40℃ for 60-120s, take it out and dry at 45-65℃; repeat immersion and drying until a suitable mass ratio is obtained.

[0046] The cement-based foamed insulation board prepared according to the embodiments of the present invention was subjected to performance testing after curing. The data are as follows (average): dry density 166.5 kg / m3, thermal conductivity 0.023 W / (m·K), drying shrinkage 1.22 mm / m, compressive strength...

[0047] 0.73 MPa, flexural strength 0.32 MPa, volumetric water absorption 7.8%.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-strength cement-based foamed insulation board, characterized in that: It includes an embedded perlite-composite fiber mesh layer and an outer foamed cement matrix. The perlite-composite fiber mesh layer is a composite fiber mesh impregnated and coated with perlite micro powder slurry. The mass ratio of perlite micro powder slurry is 3-7% of the mass of the composite fiber mesh. The perlite micro powder slurry includes the following mass components: 5-10 parts perlite micro powder, 3-5 parts sodium silicate, 20-30 parts polyvinyl alcohol 400, and 20-50 parts water.

2. The high-strength cement-based foamed insulation board according to claim 1, characterized in that: The perlite-composite fiber mesh layer has at least two layers with a layer spacing of more than 3 cm.

3. The high-strength cement-based foamed insulation board according to claim 2, characterized in that: The thickness of the perlite-composite fiber mesh layer is less than 2% of the total thickness of the cement-based foamed insulation board.

4. The high-strength cement-based foamed insulation board according to claim 1, characterized in that: The composite fiber web is woven from a blend of asbestos fiber, glass fiber, and steel fiber, with the ratios of the three fibers being 1:0.5-1:0.2-0.3, respectively.

5. The high-strength cement-based foamed insulation board according to claim 4, characterized in that: The composite fiber mesh has a pore size greater than 3 mm.

6. The high-strength cement-based foamed insulation board according to claim 1, characterized in that: The method for preparing the perlite-composite fiber mesh is as follows: take raw materials, and prepare perlite micro powder emulsion and composite fiber mesh in sequence; immerse the composite fiber mesh in perlite micro powder emulsion, sonicate at 35-40℃ for 60-120s, remove and dry at 45-65℃; repeat immersion and drying until a suitable mass ratio is achieved, and the product is obtained.