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Gypsum slurry and anti-deformation gypsum product prepared from gypsum slurry

A technology of gypsum slurry and anti-deformation additives, which is applied in the field of gypsum products, can solve problems such as poor stability, sagging and creep, and poor deformation resistance, and achieve high stability, strong deformation resistance, and non-deformable effects

Inactive Publication Date: 2018-06-08
应城市嘉鸿技术服务科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a deformation-resistant gypsum product for the above-mentioned existing gypsum products that are prone to sag and creep under humidity conditions, and have poor deformation resistance, resulting in poor stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Brushite is ground, mixed with brushite, anti-deformation additives, calcium sulfate hemihydrate, water, and auxiliary additives to form a gypsum slurry; forming gypsum board from the gypsum slurry.

[0021] Wherein, the gypsum slurry contains 76wt% calcium sulfate hemihydrate, 4.5wt% anti-deformation additive, 4.1% by weight brushite based on calcium sulfate hemihydrate, and the remaining components are water and auxiliary additives; wherein, the The anti-deformation additives include 42wt% boric acid, 8wt% tartaric acid and 50wt% sodium erythorbate; the auxiliary additives include 23wt% starch, 35wt% foaming agent and 42wt% dispersant.

Embodiment 2

[0023] Brushite is ground, mixed with brushite, anti-deformation additives, calcium sulfate hemihydrate, water, and auxiliary additives to form a gypsum slurry; forming gypsum board from the gypsum slurry.

[0024] Wherein, the gypsum slurry contains 76wt% calcium sulfate hemihydrate, 4.5wt% anti-deformation additive, 5% brushite by weight based on calcium sulfate hemihydrate, and the remaining components are water and auxiliary additives; wherein, the The anti-deformation additives include 45wt% boric acid, 12wt% tartaric acid and 43wt% sodium erythorbate; the auxiliary additives include 26wt% starch, 38wt% foaming agent and 36wt% dispersant.

Embodiment 3

[0026] Brushite is ground, mixed with brushite, anti-deformation additives, calcium sulfate hemihydrate, water, and auxiliary additives to form a gypsum slurry; forming gypsum board from the gypsum slurry.

[0027] Wherein, the gypsum slurry contains 76wt% calcium sulfate hemihydrate, 4.5wt% anti-deformation additive, 5.5% by weight brushite based on calcium sulfate hemihydrate, and the remaining components are water and auxiliary additives; wherein, the The anti-deformation additives include 43wt% boric acid, 9wt% tartaric acid and 48wt% sodium erythorbate; the auxiliary additives include 24wt% starch, 36wt% foaming agent and 38wt% dispersant.

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PUM

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Abstract

The invention provides gypsum slurry and an anti-deformation gypsum product prepared from the gypsum slurry. The gypsum slurry comprises 74 to 77 percent by weight of calcium sulfate hemihydrate, 4 to5 percent by weight of an anti-deformation additive, brushite in an amount which is 3.9 to 4.5 percent based on the weight of the calcium sulfate hemihydrate and the rest components such as water andauxiliary additives. The gypsum product prepared from the gypsum slurry shows high anti-deformation property, is difficult to deform even if under the condition of high humidity, has high stability and is very suitable for industrial application.

Description

technical field [0001] The invention belongs to the field of gypsum products, in particular to a gypsum slurry and a deformation-resistant gypsum product prepared from the gypsum slurry. Background technique [0002] In the manufacture of gypsum products, a mixture of calcined gypsum (calcium sulfate hemihydrate and / or anhydrous calcium sulfate) and water is cast, wherein the calcined gypsum (mortar) is hydrated to form set gypsum, which includes crystalline hydrated gypsum Matrix (calcium sulfate dihydrate), which gives gypsum products high structural strength. Thus gypsum products have the advantages of light weight and high strength and are widely used in building products such as plasterboards for ceilings and walls in buildings, conventional mortars for work surfaces on suspended ceilings. [0003] However, in actual use, it is found that when the gypsum products with solidified gypsum as the main component are exposed to high humidity, they will sag and creep, which a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/20
CPCC04B28/14C04B2111/20C04B22/0013C04B24/06C04B22/16C04B24/38C04B2103/408C04B2103/0068
Inventor 袁明
Owner 应城市嘉鸿技术服务科技有限公司