High-thermal-insulation building fabricated wall material and preparation method thereof

Abstract

The invention relates to the technical field of wall materials, and provides a high-thermal-insulation building fabricated wall material and a preparation method thereof.The high-thermal-insulation building fabricated wall material is prepared from, by weight, 75-85 parts of cement, 18-24 parts of polystyrene particles, 26-36 parts of a reinforcing agent, 1-2 parts of a foaming agent, 35-45 parts of water and 1-2 parts of a water reducing agent; the reinforcing agent comprises the following components in parts by weight: 15-20 parts of silica fume powder, 10-18 parts of silicon carbide whiskers and 8-20 parts of polyimide fibers. By means of the technical scheme, the problems that in the prior art, a high-heat-preservation building fabricated wall material is low in strength and poor in cracking resistance are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to a high-thermal insulation building assembled wall material and a preparation method thereof. Background Art

[0002] High-insulation building prefabricated wall materials are a new type of building materials with excellent thermal insulation performance. They can effectively reduce the energy consumption of buildings and improve indoor comfort. They also have the advantages of convenient and quick construction. However, in order to achieve good thermal insulation performance, some high-insulation wall materials may adopt a lightweight and porous structure, which often leads to a decrease in their strength; during temperature changes, high-insulation building prefabricated wall materials are also prone to shrinkage. When the shrinkage rate is relatively large, it is easy to cause wall cracks, which to a certain extent affects the widespread application of high-insulation building prefabricated wall materials.

[0003] Therefore, it is necessary to obtain a high-insulation building prefabricated wall material with high strength and excellent crack resistance, improve the performance and quality of wall materials, and promote the development of prefabricated buildings. Summary of the invention

[0004] The present invention provides a high-thermal insulation building assembled wall material and a preparation method thereof, which solves the problems of low strength and poor crack resistance of the high-thermal insulation building assembled wall material in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a high-insulation building assembled wall material, comprising the following components in parts by weight: 75-85 parts of cement, 18-24 parts of polystyrene particles, 26-36 parts of reinforcing agent, 1-2 parts of foaming agent, 35-45 parts of water, and 1-2 parts of water reducing agent; The reinforcing agent comprises the following components in parts by weight: 15 to 20 parts of silica fume powder, 10 to 18 parts of silicon carbide whiskers, and 8 to 20 parts of polyimide fibers.

[0006] As a further technical solution, the silicon carbide whisker is carbonyl octanoic acid modified silicon carbide whisker.

[0007] In the present invention, the silicon carbide whisker is modified by carbonyl octanoic acid, so as to improve the dispersion of the silicon carbide whisker and the combination in cement, and further improve the strength and crack resistance of the wall material.

[0008] As a further technical solution, in the carbonyl octanoic acid modified silicon carbide whisker, the carbonyl octanoic acid includes one or both of 5-carbonyl octanoic acid and 7-carbonyl octanoic acid.

[0009] As a further technical solution, the preparation method of the carbonyl octanoic acid modified silicon carbide whisker comprises the following steps: mixing carbonyl octanoic acid and silicon carbide whiskers to obtain carbonyl octanoic acid modified silicon carbide whiskers; the mass ratio of the carbonyl octanoic acid to the silicon carbide whiskers is 0.1~0.3:1.

[0010] As a further technical solution, the method for preparing carbonyl octanoic acid modified silicon carbide whiskers specifically includes the following steps: dissolving carbonyl octanoic acid, adding silicon carbide whiskers and mixing, to obtain carbonyl octanoic acid modified silicon carbide whiskers.

[0011] As a further technical solution, the mass ratio of the carbonyl octanoic acid modified silicon carbide whisker to the polyimide fiber is 1:1~1.5.

[0012] In the present invention, especially when the mass ratio of carbonyl octanoic acid modified silicon carbide whisker to polyimide fiber is 1:1-1.5, the strength and crack resistance of the wall material are further improved.

[0013] As a further technical solution, the polyimide fiber is a phenylsilane-modified polyimide fiber.

[0014] In the present invention, phenylsilane is used to modify the polyimide fiber, so as to reduce the electrostatic adsorption between the polyimide fibers and improve the dispersibility. After being combined with components such as silicon carbide whiskers, the strength and crack resistance of the wall material are further improved.

[0015] As a further technical solution, the preparation method of the phenylsilane-modified polyimide fiber comprises the following steps: mixing phenylsilane and polyimide fiber to obtain phenylsilane-modified polyimide fiber; the mass ratio of the phenylsilane to the polyimide fiber is 1:16-20.

[0016] As a further technical solution, the particle size of the silica fume powder is 300-600 mesh; the particle size of the silicon carbide whisker is 0.1-3 μm, and the length is 10-100 μm; the diameter of the polyimide fiber is 6-16 μm, and the length is 3-9 mm.

[0017] The particle size of the polystyrene particles is 0.5-2 mm; the foaming agent includes one or two of a rosin foaming agent and an anionic surfactant; the water reducing agent is lignin sulfonate; The phenylsilane includes one or both of diphenyldiethoxysilane and diphenyldimethoxysilane.

[0018] The present invention also provides a method for preparing the high thermal insulation building prefabricated wall material, comprising the following steps: mixing the components of the high thermal insulation building prefabricated wall material to obtain the high thermal insulation building prefabricated wall material.

[0019] The present invention also proposes the use of the high-thermal insulation building prefabricated wall material or the high-thermal insulation building prefabricated wall material prepared by the preparation method in prefabricated buildings.

[0020] The working principle and beneficial effects of the present invention are: In the present invention, the wall material is mainly composed of cement, polystyrene particles and reinforcing agent, wherein the reinforcing agent is silica fume powder, silicon carbide whisker and polyimide fiber, which significantly improves the strength and crack resistance of the wall material. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the following examples and comparative examples, the polystyrene particles were purchased from Langfang Haozhu Energy Saving Technology Co., Ltd.

[0023] Example 1 The high-insulation building prefabricated wall material comprises the following components in parts by weight: 75 parts of ordinary Portland cement (model P.O32.5), 18 parts of polystyrene particles (particle size of 1 mm), 26 parts of reinforcing agent, 1 part of sodium rosinate, 35 parts of water, and 1 part of sodium lignin sulfonate; The reinforcing agent includes the following components in parts by weight: 15 parts of silica fume (particle size 600 mesh), 10 parts of silicon carbide whisker (particle size 0.1 μm, length 10 μm), and 20 parts of polyimide fiber (diameter 6 μm, length 9 mm); The method for preparing a high-thermal insulation building assembled wall material comprises the following steps: mixing components of the high-thermal insulation building assembled wall material to obtain the high-thermal insulation building assembled wall material.

[0024] Example 2 The high-insulation building prefabricated wall material comprises the following components in parts by weight: 85 parts of ordinary Portland cement (model P.O32.5), 24 parts of polystyrene particles (particle size of 0.5 mm), 36 parts of reinforcing agent, 2 parts of sodium rosinate, 45 parts of water, and 2 parts of sodium lignin sulfonate; The reinforcing agent includes the following components in parts by weight: 20 parts of silica fume (particle size 300 mesh), 18 parts of silicon carbide whisker (particle size 3 μm, length 50 μm), 8 parts of polyimide fiber (diameter 16 μm, length 3 mm); The method for preparing a high-thermal insulation building assembled wall material comprises the following steps: mixing components of the high-thermal insulation building assembled wall material to obtain the high-thermal insulation building assembled wall material.

[0025] Example 3 The high-insulation building prefabricated wall material comprises the following components in parts by weight: 80 parts of ordinary Portland cement (model P.O32.5), 20 parts of polystyrene particles (particle size of 2 mm), 32 parts of reinforcing agent, 2 parts of sodium rosin acid, 40 parts of water, and 1.5 parts of sodium lignin sulfonate; The reinforcing agent includes the following components in parts by weight: 15 parts of silica fume (particle size is 500 mesh), 10 parts of silicon carbide whisker (particle size is 2 μm, length is 100 μm), and 18 parts of polyimide fiber (diameter is 10 μm, length is 6 mm); The method for preparing a high-thermal insulation building assembled wall material comprises the following steps: mixing components of the high-thermal insulation building assembled wall material to obtain the high-thermal insulation building assembled wall material.

[0026] Example 4 The difference between this embodiment and embodiment 3 is that the silicon carbide whiskers are replaced with carbonyl octanoic acid modified silicon carbide whiskers; The preparation method of carbonyl octanoic acid modified silicon carbide whisker comprises the following steps: After dissolving 1 g of 7-carboxyoctanoic acid in 40 mL of ethanol solution, 10 g of silicon carbide whiskers were added and mixed to obtain carboxyoctanoic acid-modified silicon carbide whiskers; wherein the mass fraction of the ethanol solution was 70%.

[0027] Example 5 The difference between this embodiment and embodiment 3 is that the silicon carbide whiskers are replaced with carbonyl octanoic acid modified silicon carbide whiskers; The preparation method of carbonyl octanoic acid modified silicon carbide whisker comprises the following steps: After 3 g of 5-carboxyoctanoic acid was dissolved in 40 mL of ethanol solution, 10 g of silicon carbide whiskers were added and mixed to obtain carboxyoctanoic acid-modified silicon carbide whiskers; wherein the mass fraction of the ethanol solution was 70%.

[0028] Example 6 The only difference between this embodiment and embodiment 5 is that the reinforcing agent includes the following components in parts by weight: 15 parts of silica fume, 10 parts of carbonyl octanoic acid modified silicon carbide whiskers, and 8 parts of polyimide fibers.

[0029] Example 7 The only difference between this embodiment and embodiment 5 is that the reinforcing agent includes the following components in parts by weight: 15 parts of silica fume, 10 parts of carbonyl octanoic acid modified silicon carbide whiskers, and 10 parts of polyimide fibers.

[0030] Example 8 The only difference between this embodiment and embodiment 5 is that the reinforcing agent includes the following components in parts by weight: 15 parts of silica fume, 10 parts of carbonyl octanoic acid modified silicon carbide whiskers, and 15 parts of polyimide fibers.

[0031] Example 9 The only difference between this embodiment and embodiment 8 is that the polyimide fiber is replaced by silane-modified polyimide fiber. The preparation method of the silane-modified polyimide fiber includes the following steps: 1 g of γ-aminopropyltriethoxysilane and 20 g of polyimide fiber are mixed to obtain phenylsilane-modified polyimide fiber.

[0032] Example 10 The only difference between this embodiment and embodiment 8 is that the polyimide fiber is replaced by phenylsilane-modified polyimide fiber. The preparation method of the phenylsilane-modified polyimide fiber includes the following steps: 1 g of phenyldiethoxysilane and 20 g of polyimide fiber are mixed to obtain phenylsilane-modified polyimide fiber.

[0033] Embodiment 11 The only difference between this embodiment and embodiment 8 is that the polyimide fiber is replaced by phenylsilane-modified polyimide fiber. The preparation method of phenylsilane-modified polyimide fiber includes the following steps: 1 g of diphenyldiethoxysilane and 20 g of polyimide fiber are mixed to obtain phenylsilane-modified polyimide fiber.

[0034] Example 12 The only difference between this embodiment and embodiment 8 is that the polyimide fiber is replaced by phenylsilane-modified polyimide fiber. The preparation method of phenylsilane-modified polyimide fiber includes the following steps: 1 g of diphenyldimethoxysilane and 16 g of polyimide fiber are mixed to obtain phenylsilane-modified polyimide fiber.

[0035] Comparative Example 1 The only difference between this comparative example and Example 3 is that the reinforcing agent includes the following components in parts by weight: 15 parts of silica fume and 18 parts of polyimide fibers.

[0036] Comparative Example 2 The only difference between this comparative example and Example 3 is that the reinforcing agent includes the following components in parts by weight: 15 parts of silica fume and 10 parts of silicon carbide whiskers.

[0037] Comparative Example 3 The only difference between this comparative example and Example 3 is that the reinforcing agent includes the following components in parts by weight: 10 parts of silicon carbide whiskers and 18 parts of polyimide fibers.

[0038] Comparative Example 4 The only difference between this comparative example and Example 3 is that the reinforcing agent is silica fume powder.

[0039] The following tests were performed on the high thermal insulation building prefabricated wall materials prepared in Examples 1 to 12 and Comparative Examples 1 to 4 respectively: Compressive strength: 28d compressive strength test according to standard JG / T 266-2011 "Foamed concrete"; Cracking resistance: According to the standard GB / T 50082-2009 "Standard for test methods of long-term performance and durability of ordinary concrete", after pouring the wall material for 24 hours, measure and calculate the total cracking area per unit area, and retain the result as an integer.

[0040] The results are shown in Table 1 below.

[0041] Table 1 Wall material performance test results

[0042] It can be found from Table 1 that compared with Comparative Examples 1 to 4, the wall materials prepared in Examples 1 to 12 have higher compressive strength and smaller total cracking area, indicating that the use of silica fume, silicon carbide whiskers, and polyimide fibers as reinforcing agents significantly improves the strength and cracking resistance of the wall materials.

[0043] Compared with Example 3, the wall materials prepared in Examples 4-5 have higher compressive strength and smaller total cracking area, indicating that the reinforcing agent silicon carbide whiskers are modified by carbonyl octanoic acid to further improve the strength and cracking resistance of the wall materials.

[0044] Compared with Examples 5-6, the wall materials prepared in Examples 7-8 have higher compressive strength and smaller total cracking area, indicating that especially when the mass ratio of carbonyl octanoic acid modified silicon carbide whiskers to polyimide fibers is 1:1-1.5, the strength and crack resistance of the wall materials are further improved.

[0045] Compared with Examples 8 to 10, the wall materials prepared in Examples 11 to 12 have higher compressive strength and smaller total cracking area, indicating that the use of phenylsilane-modified polyimide fibers in combination with components such as silicon carbide whiskers can further improve the strength and cracking resistance of the wall materials.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high thermal insulation building assembled wall material, characterized in that: The invention comprises the following components in parts by weight: 75-85 parts of cement, 18-24 parts of polystyrene particles, 26-36 parts of reinforcing agent, 1-2 parts of foaming agent, 35-45 parts of water, and 1-2 parts of water reducing agent; The reinforcing agent comprises the following components in parts by weight: 15 to 20 parts of silica fume powder, 10 to 18 parts of silicon carbide whiskers, and 8 to 20 parts of polyimide fibers.

2. A high thermal insulation building assembled wall material according to claim 1, characterized in that: The silicon carbide whisker is carbonyl octanoic acid modified silicon carbide whisker.

3. A high thermal insulation building assembled wall material according to claim 2, characterized in that: In the carbonyl octanoic acid modified silicon carbide whisker, the carbonyl octanoic acid includes one or both of 5-carbonyl octanoic acid and 7-carbonyl octanoic acid.

4. The high thermal insulation building assembled wall material according to claim 2, characterized in that: The method for preparing carbonyl octanoic acid modified silicon carbide whiskers comprises the following steps: mixing carbonyl octanoic acid and silicon carbide whiskers to obtain carbonyl octanoic acid modified silicon carbide whiskers; the mass ratio of carbonyl octanoic acid to silicon carbide whiskers is 0.1-0.3:

1.

5. The high thermal insulation building assembled wall material according to claim 4, characterized in that: The mass ratio of the carbonyl octanoic acid modified silicon carbide whisker to the polyimide fiber is 1:1-1.

5.

6. The high thermal insulation building assembled wall material according to claim 1, characterized in that: The polyimide fiber is phenylsilane modified polyimide fiber.

7. The high thermal insulation building assembled wall material according to claim 6, characterized in that: The preparation method of the phenylsilane-modified polyimide fiber comprises the following steps: mixing phenylsilane and polyimide fiber to obtain the phenylsilane-modified polyimide fiber; the mass ratio of the phenylsilane to the polyimide fiber is 1:16-20.

8. The high thermal insulation building assembled wall material according to claim 7, characterized in that: The particle size of the silica fume powder is 300-600 mesh; the particle size of the silicon carbide whisker is 0.1-3 μm, and the length is 10-100 μm; the diameter of the polyimide fiber is 6-16 μm, and the length is 3-9 mm. The particle size of the polystyrene particles is 0.5-2 mm; the foaming agent includes one or two of a rosin foaming agent and an anionic surfactant; the water reducing agent is lignin sulfonate; The phenylsilane includes one or both of diphenyldiethoxysilane and diphenyldimethoxysilane.

9. A method for preparing a high thermal insulation building assembled wall material according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: mixing the components of the high-thermal insulation building assembled wall material to obtain the high-thermal insulation building assembled wall material.

10. Use of the high thermal insulation building prefabricated wall material according to any one of claims 1 to 8 or the high thermal insulation building prefabricated wall material prepared by the preparation method according to claim 9 in prefabricated buildings.

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