A preparation method of composite mortar rock wool board

Abstract

The present invention discloses a method for preparing a composite mortar rock wool board. A layer of mortar is spread on the rock wool board, and a 1-5 mesh cloth is spread, and the mesh cloth is pressed into the mortar, and then the board is placed in a drying rack for sun drying; the rock wool board is turned over by a turning machine, and the above operation is repeated; the dried rock wool board is removed from the drying rack, and the board is placed in a four-sided flush saw to trim the four sides of the board, and the trimmed boards are stacked and packaged by a stacking machine to form a board. The composite mortar rock wool board prepared by the present invention improves the crack resistance and mechanical properties of the material while maintaining the thermal insulation performance of the rock wool board. The combined use of polyvinyl acetate and jute fiber improves the crack resistance of the material; the combined use of terpene phenolic resin and active steel slag powder improves the mechanical properties of the material, and synergistically enhances the effect.

Description

Technical Field

[0001] The invention belongs to the technical field of building material preparation, and particularly relates to a method for preparing a composite mortar rock wool board. Background Art

[0002] Rock wool board is an artificial inorganic fiber made of basalt as the main raw material, which is processed by high temperature melting. It has the characteristics of light weight, low thermal conductivity, heat absorption and non-flammability. Rock wool has stable chemical properties, a pH value of 7-8, and is neutral or weakly alkaline. It has no corrosion to metal materials such as carbon steel, stainless steel, and aluminum.

[0003] External wall insulation rock wool board is a special rock wool board for external wall insulation. It is a Class A non-combustible fireproof insulation material with the advantages of high compressive and tensile strength, low water and moisture absorption, good dimensional stability, no thermal expansion or contraction, and aging resistance. It is compatible with the external wall system and provides buildings with effective insulation, energy saving, fire prevention, and extreme climate protection. The external wall insulation rock wool belt can also be used as a fire isolation belt and used in conjunction with insulation materials whose combustion performance does not reach Class A to improve the fire protection function of the building's external wall. External wall insulation rock wool board also has its inherent defects. The fine fibers of rock wool are easy to fly away. It is harmful to the body if people inhale or are in this environment. Therefore, mortar should be applied on both sides of the rock wool board before it can be used as an external wall insulation board. After applying mortar, the mechanical properties and crack resistance of the material are reduced. It is urgent to develop a composite mortar suitable for rock wool board to ensure the mechanical properties and crack resistance of the material. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing a composite mortar rock wool board.

[0005] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0006] (1) Spread a layer of mortar on the rock wool board, scrape it flat with a scraper, then spread 1-5 layers of mesh cloth, press the mesh cloth into the mortar, and then put it into the drying rack to dry;

[0007] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 1-5 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0008] (3) The rock wool board dried in step (2) is removed from the drying rack, and sent to a four-sided saw to trim the four sides of the board. The trimmed boards are stacked and packaged using a stacking machine to complete the process.

[0009] The mortar is mixed by the following components in parts by weight: 80-120 parts of cement, 150-250 parts of river sand, 30-80 parts of adhesive, 10-30 parts of anti-cracking agent, 10-20 parts of thickener, 10-20 parts of accelerator, 20-30 parts of additive, and 50-100 parts of water.

[0010] The adhesive is one or more of ethylene-vinyl acetate copolymer, styrene-acrylate copolymer, rubber powder, guar gum, and xanthan gum powder.

[0011] The anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:1.

[0012] The thickener is one or more of bentonite, nano kaolin, molybdenum tailings powder and rodite clay powder.

[0013] The coagulant is one or more of coal gangue, phosphogypsum, blast furnace slag powder, ferrovanadium waste residue and lithium carbonate.

[0014] The auxiliary agent is a mixed material of terpene phenolic resin and active steel slag powder in a mass ratio of 1:1.

[0015] The active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0016] Beneficial effects of the present invention: The composite mortar rock wool board prepared by the present invention improves the crack resistance and mechanical properties of the material while maintaining the thermal insulation performance of the rock wool board. The combined use of polyvinyl acetate and jute fiber improves the crack resistance of the material; the combined use of terpene phenolic resin and active steel slag powder improves the mechanical properties of the material and achieves synergistic enhancement. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described more fully below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0018] Example 1

[0019] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0020] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place three layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0021] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 3 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0022] (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine;

[0023] The mortar is mixed by the following components in parts by weight: 100 parts of cement, 200 parts of river sand, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of anti-cracking agent, 15 parts of nano-kaolin, 15 parts of phosphogypsum, 25 parts of additives, and 80 parts of water; the anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:1; the additive is a mixed material of terpene phenolic resin and active steel slag powder in a mass ratio of 1:1; the active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0024] Example 2

[0025] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0026] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place two layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0027] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread two layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0028] (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine;

[0029] The mortar is mixed with the following components in parts by weight: 80 parts of cement, 150 parts of river sand, 30 parts of styrene-acrylate copolymer, 10 parts of anti-cracking agent, 10 parts of bentonite, 10 parts of coal gangue, 20 parts of auxiliary agent, and 50 parts of water; the anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:1; the auxiliary agent is a mixed material of terpene phenolic resin and active steel slag powder in a mass ratio of 1:1; the active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0030] Example 3

[0031] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0032] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place 4 layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0033] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 4 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0034] (3) The rock wool board dried in step (2) is removed from the drying rack, and sent to a four-sided saw to trim the four sides of the board. The trimmed boards are stacked and packaged using a stacking machine to complete the process.

[0035] The mortar is mixed with the following components in parts by weight: 120 parts of cement, 250 parts of river sand, 80 parts of guar gum, 30 parts of anti-cracking agent, 20 parts of calcite clay powder, 20 parts of ferroalloy waste slag, 30 parts of auxiliary agent, and 100 parts of water; the anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:1; the auxiliary agent is a mixed material of terpene phenolic resin and active steel slag powder in a mass ratio of 1:1; the active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0036] Comparative Example 1

[0037] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0038] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place three layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0039] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 3 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0040] (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine;

[0041] The mortar is mixed by the following components in parts by weight: 100 parts of cement, 200 parts of river sand, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of polyvinyl acetate, 15 parts of nano-kaolin, 15 parts of phosphogypsum, 25 parts of additives, and 80 parts of water; the additive is a mixed material of terpene phenolic resin and active steel slag powder in a mass ratio of 1:1; the active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0042] Comparative Example 2

[0043] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0044] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place three layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0045] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 3 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0046] (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine;

[0047] The mortar is mixed with the following components in parts by weight: 100 parts of cement, 200 parts of river sand, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of jute fiber, 15 parts of nano-kaolin, 15 parts of phosphogypsum, 25 parts of additives, and 80 parts of water; the additive is a mixed material of terpene phenolic resin and active steel slag powder in a mass ratio of 1:1; the active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0048] Comparative Example 3

[0049] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0050] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place three layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0051] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 3 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0052] (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine;

[0053] The mortar is mixed by the following components in parts by weight: 100 parts of cement, 200 parts of river sand, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of anti-cracking agent, 15 parts of nano-kaolin, 15 parts of phosphogypsum, 25 parts of terpene phenolic resin, and 80 parts of water; the anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:1.

[0054] Comparative Example 4

[0055] A method for preparing a composite mortar rock wool board is carried out according to the following steps:

[0056] (1) Place a layer of mortar on the rock wool board, scrape it flat with a scraper, then place three layers of mesh cloth, press the mesh cloth into the mortar, and then place it on the drying rack to dry;

[0057] (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 3 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry;

[0058] (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine;

[0059] The mortar is mixed by the following components in parts by weight: 100 parts of cement, 200 parts of river sand, 60 parts of ethylene-vinyl acetate copolymer, 20 parts of anti-cracking agent, 15 parts of nano-kaolin, 15 parts of phosphogypsum, 25 parts of active steel slag powder, and 80 parts of water; the anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:1; the active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

[0060] Experimental example:

[0061] According to the provisions of GB / T 7019-2014 fiber cement product test method, the water absorption rate of the thermal insulation integrated panels prepared in Examples 1-3 and Comparative Examples 1-2 was tested. The test results are shown in Table 1:

[0062] Table 3

[0063]

[0064]

[0065] Note: * represents P < 0.05 compared with the group in Example 1.

[0066] According to the provisions of GB / T 7019-2014 fiber cement product test method, the flexural strength test of the thermal insulation integrated panels prepared in Examples 1-3 and Comparative Examples 3-4 was performed. The test results are shown in Table 2:

[0067] Table 2

[0068] Experimental Group Flexural strength MPa Example 1 16.3±1.5 Example 2 16.2±2.1 Example 3 16.5±1.2 Comparative Example 3 13.3±2.1* Comparative Example 4 13.1±1.2*

[0069] Note: * represents P < 0.05 compared with the group in Example 1.

[0070] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for preparing a composite mortar rock wool board, characterized in that: Follow these steps: (1) Spread a layer of mortar on the rock wool board, scrape it flat with a scraper, then spread 1-5 layers of mesh cloth, press the mesh cloth into the mortar, and then put it into the drying rack to dry; (2) Turn the rock wool board over with a turning machine, spread a layer of mortar on the other side of the rock wool board, and then spread 1-5 layers of mesh cloth after scraping it flat with a scraper. Press the mesh cloth into the mortar and put it into the drying rack to dry; (3) removing the rock wool board dried in step (2) from the drying rack, entering a four-sided trimming saw to trim the four sides of the board, and stacking and packaging the trimmed boards with a stacking machine; The mortar is mixed by the following components in parts by weight: 80-120 parts of cement, 150-250 parts of river sand, 30-80 parts of adhesive, 10-30 parts of anti-cracking agent, 10-20 parts of thickener, 10-20 parts of accelerator, 20-30 parts of additives, and 50-100 parts of water; the additive is a mixed material of terpene phenolic resin and active steel slag powder mixed in a mass ratio of 1:

1.

2. The method for preparing the composite mortar rock wool board according to claim 1, characterized in that: The adhesive is one or more of ethylene-vinyl acetate copolymer, styrene-acrylate copolymer, rubber powder, guar gum, and xanthan gum powder.

3. The method for preparing the composite mortar rock wool board according to claim 1, characterized in that: The anti-cracking agent is a mixed material of polyvinyl acetate and jute fiber in a mass ratio of 2:

1.

4. The method for preparing the composite mortar rock wool board according to claim 1, characterized in that: The thickener is one or more of bentonite, nano kaolin, molybdenum tailings powder and rodite clay powder.

5. The method for preparing the composite mortar rock wool board according to claim 1, characterized in that: The coagulant is one or more of coal gangue, phosphogypsum, blast furnace slag powder, ferrovanadium waste residue and lithium carbonate.

6. The method for preparing the composite mortar rock wool board according to claim 1, characterized in that: The active steel slag powder has a metallic iron content of ≤0.5%, an average particle size of ≤6.0 μm, and a specific surface area of ​​≥850 m 2 / ㎏.

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