Gypsum-based interior wall partition plate and preparation method thereof

Abstract

The invention provides a gypsum-based interior wall partition plate and a preparation method thereof. The gypsum-based interior wall partition plate is prepared from the following components in parts by weight: 300 to 400 parts of desulfurized gypsum powder, 60 to 100 parts of cement, 60 to 100 parts of fly ash, 300 to 350 parts of water, 10 to 20 parts of gypsum modifier, 1 to 3 parts of anti-cracking fiber and 3 to 6 parts of lightweight aggregate. According to the gypsum-based interior wall partition plate provided by the invention, desulfurized gypsum is taken as a basic material, cementing materials such as cement and fly ash are doped, preferably, light aggregates such as perlite, glass beads and water granulated slag are taken as filling aggregates, anti-cracking fibers are doped to improve bond stress and anti-cracking performance, and a certain proportion of gypsum modifier is doped to prepare a modified gypsum-based light partition plate; the porosity of the partition plate structure is greatly reduced, the compactness and strength of the partition plate are enhanced, the used raw materials are waste raw materials, and improvement of the environmental friendliness of the product is facilitated.

Description

A gypsum-based interior wall partition and its preparation method Technical Field

[0001] This invention relates to the field of building materials technology, and more specifically, to a gypsum-based interior wall partition and its preparation method. Background Technology

[0002] As a new type of wall material, partition wall panels can be widely used in interior partition walls, enclosure walls, light steel structure enclosed roofs and roof panels, etc., which shortens the construction period, reduces labor intensity, lowers project costs, and increases the usable area of ​​buildings, and is the direction of wall reform.

[0003] Currently, there are four main types of partition wall panels promoted and used in the market: 1. Polystyrene particle composite partition wall panel: This type uses ordinary silicate cement and fly ash as cementing materials, polystyrene particles as filler, and calcium silicate board as the face panel. Appropriate chemical additives are added, and the panels are mixed, poured, and molded to form a sandwich panel shape. This type of panel has disadvantages such as high cost, difficulty in wiring the wall, and easy peeling of the face panel when exposed to moisture for a long time, so its market share is very small.

[0004] 2. GRC Lightweight Partition Board: This type of board uses ordinary cement or rapid-hardening cement as the binder, with the addition of fly ash, perlite, slag, fiber mesh, and a small amount of chemical additives. It is then mixed and cast into shape. This board requires autoclaving after molding, which is costly and does not change the general properties of cement boards. Irregular shrinkage cracks in cement occur frequently, seriously affecting quality.

[0005] 3. FGC Lightweight Wall Panels: These panels use magnesium chloride and magnesium oxide as binders, with the addition of fly ash, sawdust, straw, fiberglass mesh, and a small amount of chemical additives. They are then mixed and cast into shape. However, the scarcity and high cost of magnesium chloride and magnesium oxide make material procurement difficult, and these panels are prone to severe deformation when exposed to moisture.

[0006] 4. Gypsum wallboard: This type of wallboard uses gypsum powder as a binder, with the addition of fly ash, lightweight materials, fiberglass mesh, and appropriate additives. It is then mixed and cast into shape. This type of board has a reasonable cost, but its main drawbacks are that it easily absorbs moisture, deforms, and effloresces. Summary of the Invention

[0007] In view of this, the present invention proposes a gypsum-based interior wall partition and its preparation method, aiming to solve the problem of high porosity and insufficient density of existing gypsum-based interior wall partition structures.

[0008] In one aspect, the present invention provides a gypsum-based interior wall partition comprising the following components in parts by weight: 300-400 parts desulfurized gypsum powder, 60-100 parts cement, 60-100 parts fly ash, 300-350 parts water, 10-20 parts gypsum modifier, 1-3 parts crack-resistant fiber, and 3-6 parts lightweight aggregate.

[0009] Furthermore, the above-mentioned gypsum-based interior wall partition includes the following components in parts by weight: 320-345 parts desulfurized gypsum powder, 70-90 parts cement, 70-100 parts fly ash, 310-345 parts water, 15-18 parts gypsum modifier, 1.8-2.2 parts crack-resistant fiber, and 4.5-5 parts lightweight aggregate.

[0010] Furthermore, in the aforementioned gypsum-based interior wall partition, the lightweight aggregate is at least one of perlite, vitrified microspheres, and water slag.

[0011] Furthermore, in the above-mentioned gypsum-based interior wall partition, the gypsum modifier is a reinforcing agent.

[0012] Furthermore, in the above-mentioned gypsum-based interior wall partition, the reinforcing agent is cellulose ether or polyvinyl alcohol.

[0013] On the other hand, the present invention also proposes a method for preparing gypsum-based interior wall partitions, comprising: Step 1, accurately measuring water, gypsum modifier, and crack-resistant fiber and pouring them into a mixing tank, and stirring until uniform; Step 2, pouring desulfurized gypsum powder, cement, fly ash, and lightweight aggregate into a mixing tank, and stirring until the mixture is in a uniform fluid state to obtain a well-mixed slurry; Step 3, fixing the required model according to certain specifications and dimensions, and fixing a certain area and quantity of fiberglass mesh cloth on both sides inside the model; Step 4, injecting the slurry obtained in Step 2 into the model in Step 3 and removing air bubbles; Step 5, stacking the molded and demolded interior wall partitions neatly and allowing them to cure naturally.

[0014] The gypsum-based interior wall partition provided by this invention uses desulfurized gypsum as the base material, and adds cement, fly ash and other cementing materials. It preferably uses lightweight aggregates such as perlite, vitrified microspheres and water slag as filler aggregates, and incorporates crack-resistant fibers to improve the bonding force and crack resistance. A certain proportion of gypsum modifier is added to make a modified gypsum-based lightweight partition board, which greatly reduces the porosity of the partition structure and enhances the density and strength of the partition. Moreover, the raw materials used are recycled waste materials, which helps to improve the environmental friendliness of the product. Detailed Implementation

[0015] The present invention will now be described in detail with reference to embodiments.

[0016] The gypsum-based interior wall partition of this invention comprises the following components in parts by weight: 300-400 parts desulfurized gypsum powder, 60-100 parts cement, 60-100 parts fly ash, 300-350 parts water, 10-20 parts gypsum modifier, 1-3 parts crack-resistant fiber, and 3-6 parts lightweight aggregate.

[0017] Preferably, the gypsum-based interior wall partition comprises the following components in parts by weight: 320-345 parts desulfurized gypsum powder, 70-90 parts cement, 70-100 parts fly ash, 310-345 parts water, 15-18 parts gypsum modifier, 1.8-2.2 parts crack-resistant fiber, and 4.5-5 parts lightweight aggregate.

[0018] In this embodiment, desulfurized gypsum powder, cement, and fly ash are used as gel materials.

[0019] The cement used can be PO42.5 cement. The lightweight aggregate is at least one of perlite, vitrified microspheres, and slag. It can be seen that the raw materials used in this invention are all recycled waste materials, free of radioactive elements, and the production and processing are pollution-free; therefore, this wall panel is a green product.

[0020] The gypsum modifier is a reinforcing agent. The reinforcing agent is either cellulose ether or polyvinyl alcohol, which helps to increase the strength of the material.

[0021] As can be seen, this invention uses desulfurized gypsum as the base material, and mixes cement, fly ash and other cementing materials. It also selects lightweight aggregates such as perlite, vitrified microspheres and water slag as filler aggregates, incorporates crack-resistant fibers to improve bonding strength and crack resistance, and adds a certain proportion of gypsum modifier to produce modified gypsum-based lightweight partition wall panels.

[0022] This invention also provides a method for preparing gypsum-based interior wall partitions, comprising: Step 1, accurately measuring water, gypsum modifier, and crack-resistant fiber and pouring them into a mixing tank, stirring until uniform; Step 2, pouring desulfurized gypsum powder, cement, fly ash, and lightweight aggregate into a mixing tank, stirring until the mixture is in a uniform fluid state to obtain a homogeneous slurry; Step 3, fixing the required mold according to certain specifications and dimensions, and fixing a certain area and quantity of fiberglass mesh cloth on both sides inside the mold; Step 4, injecting the slurry obtained in Step 2 into the mold in Step 3, and removing air bubbles; Step 5, stacking the molded and demolded interior wall partitions neatly and allowing them to cure naturally.

[0023] This invention has high production efficiency, using an automated integrated production line, with a production capacity of up to 200 square meters of lightweight partition wall panels per hour.

[0024] The invention is described in detail below with several embodiments: Embodiment 1: 318 kg of water, 15 kg of gypsum modifier, and 1.8 kg of crack-resistant fiber are accurately measured and poured into a mixing tank, and stirred until homogeneous; 330 kg of desulfurized gypsum powder, 90 kg of cement, 70 kg of fly ash, and 5 kg of perlite are poured into the mixing tank and stirred until the mixture is in a homogeneous fluid state, obtaining a homogeneous slurry; the required mold is fixed according to certain specifications and dimensions, and a certain area of ​​fiberglass mesh is fixed on both sides of the mold; the slurry obtained above is injected into the mold, and air bubbles are removed; the molded and demolded interior wall partitions are stacked neatly and naturally cured. In this embodiment, the water-cement ratio (mass ratio) is 0.65, and the cementing materials are: desulfurized gypsum powder, PO42.5 cement, and fly ash (mass of 490 kg).

[0025] In Example 2, 325 kg of water, 17 kg of gypsum modifier, and 2 kg of crack-resistant fiber were accurately measured and poured into a mixing tank, and stirred until homogeneous. 350 kg of desulfurized gypsum powder, 70 kg of cement, 90 kg of fly ash, and 4.5 kg of perlite were then added to the mixing tank and stirred until the mixture reached a homogeneous fluid state, resulting in a well-mixed slurry. A mold was fixed according to specific dimensions, and a certain area of ​​fiberglass mesh was fixed to both sides of the mold. The slurry obtained above was poured into the mold, and air bubbles were removed. The molded and demolded interior wall partitions were stacked neatly and allowed to cure naturally. In this example, the water-cement ratio (mass ratio) was 0.64, and the cementing materials were: desulfurized gypsum powder, PO42.5 cement, and fly ash (mass of 510 kg).

[0026] In Example 3, 310 kg of water, 16.5 kg of gypsum modifier, and 2.2 kg of crack-resistant fiber were accurately measured and poured into a mixing tank, and stirred until homogeneous. 320 kg of desulfurized gypsum powder, 80 kg of cement, 95 kg of fly ash, and 5.5 kg of perlite were then added to the mixing tank and stirred until the mixture reached a homogeneous fluid state, resulting in a homogeneous slurry. A mold was fixed according to specific dimensions, and a certain area of ​​fiberglass mesh was fixed to both sides of the mold. The slurry obtained above was poured into the mold, and air bubbles were removed. The molded and demolded interior wall partitions were stacked neatly and allowed to cure naturally. In this example, the water-cement ratio (mass ratio) was 0.63, and the cementing materials were: desulfurized gypsum powder, PO42.5 cement, and fly ash (495 kg by mass).

[0027] In Example 4, 345 kg of water, 18 kg of gypsum modifier, and 1.9 kg of crack-resistant fiber were accurately measured and poured into a mixing tank, and stirred until homogeneous. 345 kg of desulfurized gypsum powder, 75 kg of cement, 100 kg of fly ash, and 4.7 kg of perlite were then added to the mixing tank and stirred until the mixture reached a homogeneous fluid state, resulting in a homogeneous slurry. A mold was fixed according to specific dimensions, and a certain area of ​​fiberglass mesh was fixed to both sides of the mold. The slurry obtained above was poured into the mold, and air bubbles were removed. The molded and demolded interior wall partitions were stacked neatly and allowed to cure naturally. In this example, the water-cement ratio (mass ratio) was 0.66, and the cementing materials were: desulfurized gypsum powder, PO42.5 cement, and fly ash (mass of 520 kg).

[0028] The performance of the interior wall partitions prepared in Examples 1-4 above was tested, and the results are as follows: As can be seen from the table above, the wall panels prepared by this invention have high density and strength, are not prone to cracking, and have low density.

[0029] In summary, this invention provides a method for manufacturing modified gypsum-based lightweight partition boards that achieves a dense crystal structure, low porosity, low cost, environmental friendliness, lightweight yet high strength, no quality defects, and extremely high production efficiency by fusing gypsum base with gypsum modifier. This method ensures the macroscopic mechanical properties and water resistance of the matrix material.

[0030] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A gypsum-based interior wall partition, characterized in that, It includes the following components in parts by weight: 300-400 parts desulfurized gypsum powder, 60-100 parts cement, 60-100 parts fly ash, 300-350 parts water, 10-20 parts gypsum modifier, 1-3 parts crack-resistant fiber, and 3-6 parts lightweight aggregate.

2. The gypsum-based interior wall partition according to claim 1, characterized in that, The composition includes the following components in parts by weight: 320-345 parts desulfurized gypsum powder, 70-90 parts cement, 70-100 parts fly ash, 310-345 parts water, 15-18 parts gypsum modifier, 1.8-2.2 parts crack-resistant fiber, and 4.5-5 parts lightweight aggregate.

3. The gypsum-based interior wall partition according to claim 1, characterized in that, The lightweight aggregate is at least one of perlite, vitrified microspheres, and water slag.

4. The gypsum-based interior wall partition according to claim 1, characterized in that, The gypsum modifier is a reinforcing agent.

5. The gypsum-based interior wall partition according to claim 4, characterized in that, The reinforcing agent is cellulose ether or polyvinyl alcohol.

6. A method for preparing a gypsum-based interior wall partition as described in any one of claims 1 to 5, characterized in that, include: Step 1: Accurately measure and pour water, gypsum modifier, and crack-resistant fiber into a mixing tank, and stir until homogeneous. Step 2: Pour desulfurized gypsum powder, cement, fly ash, and lightweight aggregate into the mixing tank, and stir until the mixture is a homogeneous fluid, obtaining a homogeneous slurry. Step 3: Fix the required mold according to specific dimensions, and fix a certain area of ​​fiberglass mesh on both sides inside the mold. Step 4: Pour the slurry obtained in Step 2 into the mold obtained in Step 3, and remove air bubbles. Step 5: Stack the molded and demolded interior wall partitions neatly and allow them to cure naturally.

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