Lightweight high-strength fiber gypsum board and preparation method thereof

A high-strength fiber and gypsum board technology, applied in the field of lightweight high-strength fiber gypsum board and its preparation, can solve the problems of complex preparation methods and high production costs of gypsum board

Pending Publication Date: 2021-07-30
湖南愿景住宅工业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method of the gypsum board is complex and the production cost is high

Method used

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  • Lightweight high-strength fiber gypsum board and preparation method thereof

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preparation example Construction

[0047] The preparation method of the desulfurized gypsum powder used in all embodiments of the present invention is the same, comprising the following steps:

[0048] (1) Mix the desulfurized gypsum raw material with the composite admixture evenly. The composite additive is composed of calcium phosphate, aluminum sulfate and sodium citrate in a weight ratio of 15:45:2. The amount of the composite admixture is 1.5% of the weight of the desulfurized gypsum raw material. %, get the mixture;

[0049] (2) Dehydrate and crystallize the mixture obtained in step (1) in a closed container. The reaction temperature is 125°C, the reaction pressure is 0.4Mpa, the reaction time is 3h, and then dried. The drying temperature is 105°C, the drying time is 2 hours, the dehydration reaction and drying are carried out in the same airtight container, and short columnar α-gypsum crystals are obtained;

[0050] (3) Grinding and modifying the short columnar α-gypsum crystals obtained in step (2) wit...

Embodiment 1

[0052] The lightweight high-strength fiber gypsum board of this embodiment is made of the following raw materials in parts by weight: 75 parts of desulfurized gypsum α powder, 250 parts of tobermorite slurry, 5 parts of mixed fiber (the mass ratio of polypropylene fiber to pulp fiber 2.5:1), 0.5 parts of polycarboxylate superplasticizer, 0.5 parts of potassium tartrate, 0.2 parts of silicon acrylic emulsion, 0.25 parts of polyethylene glycol, 5 parts of hydroxypropyl starch ether, and 60 parts of water.

[0053] The preparation method of the lightweight high-strength fiber plasterboard of the present embodiment comprises the following steps:

[0054] (1) Mix tobermolite slurry, rheological agent and water, and stir at high speed for 2-3 minutes to obtain mixed slurry A;

[0055] (2) Add mixed fiber, retarder, water reducer, organic water repellent and modified starch to the mixed slurry A obtained in step (1) and mix, and stir evenly to obtain mixed slurry B;

[0056] (3) Add...

Embodiment 2

[0060] The lightweight high-strength fiber gypsum board of this embodiment is made of the following raw materials in parts by weight: 70 parts of desulfurized gypsum α powder, 300 parts of tobermorite slurry, 5 parts of mixed fiber (the mass ratio of polypropylene fiber to pulp fiber 2.5:1), 0.5 parts of polycarboxylate superplasticizer, 0.5 parts of potassium tartrate, 0.2 parts of silicon acrylic emulsion, 0.22 parts of polyethylene glycol, 5 parts of hydroxypropyl starch ether, and 50 parts of water.

[0061] The preparation method of the lightweight high-strength fiber plasterboard of the present embodiment comprises the following steps:

[0062] (1) Mix tobermolite slurry, rheological agent and water, and stir at high speed for 2-3 minutes to obtain mixed slurry A;

[0063] (2) Add mixed fiber, retarder, water reducer, organic water repellent and modified starch to the mixed slurry A obtained in step (1) and mix, and stir evenly to obtain mixed slurry B;

[0064] (3) Add...

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Abstract

The invention discloses a light high-strength fiber gypsum board and a preparation method thereof. The lightweight high-strength fiber gypsum board is prepared from the following raw materials: desulfurized gypsum alpha powder, tobermorite slurry, mixed fibers, a water reducing agent, a retarder, an organic water repellent, a rheological agent, modified starch and water. The preparation method comprises the following steps: (1) mixing the tobermorite slurry, the rheological agent and the water to obtain mixed slurry A; (2) adding the mixed fibers, the retarder, the water reducing agent, the organic water repellent and the modified starch into the mixed slurry A, and performing uniform stirring to obtain mixed slurry B; (3) adding the desulfurized gypsum alpha powder into the mixed slurry B to obtain gypsum slurry; and (4) pouring the gypsum slurry into a pressure forming machine for forming, and then performing drying and curing to be absolutely dry. The lightweight high-strength fiber gypsum board is low in volume weight, high in breaking strength and compressive strength, high in fire resistance rating, low in production cost and simple in preparation method.

Description

technical field [0001] The invention relates to a gypsum board and a preparation method thereof, in particular to a light-weight high-strength fiber gypsum board and a preparation method thereof. Background technique [0002] As a traditional cementitious material, gypsum is widely used because of its excellent properties such as light weight, heat insulation, sound insulation, and dimensional stability. Gypsum boards are widely used in interior partition walls, wall cladding panels (instead of plastering layers), ceilings, sound-absorbing panels, ground floor panels and various decorative panels, etc. [0003] However, the gypsum boards currently on the market generally have problems such as high bulk density, poor water resistance, low strength, and low fire protection rating, which are not convenient for construction and have poor practical performance. [0004] CN111268986A discloses a lightweight sandwich-free paper-faced gypsum board containing alpha-high-strength ph...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/40
CPCC04B28/144C04B2111/40C04B2111/00008C04B2201/20C04B2201/50C04B14/041C04B16/0633C04B18/241C04B2103/302C04B2103/22C04B2103/65C04B24/38C04B14/06C04B24/32
Inventor 黄兴张小勇谢志鹏
Owner 湖南愿景住宅工业科技有限公司
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