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Method for preparing water-resistant gypsum board

A technology of gypsum board and gypsum, which is applied in the field of building materials, can solve problems such as uneven distribution of raw materials and poor performance of wallboards, and achieve long-term water resistance, stable water resistance, and the effect of saving raw materials

Inactive Publication Date: 2021-06-25
许娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Gypsum applied to building materials usually requires high water resistance. Providing a stable and long-term water-resistant gypsum emulsion is an effective way to solve the plight of gypsum materials in building materials. Most of the existing methods for preparing gypsum boards are through Prepared by simple mixing, uneven distribution of raw materials, resulting in poor wallboard performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing water-resistant gypsum board in this embodiment, the raw materials include the following components by weight:

[0025] 80 parts of gypsum;

[0026] 20 parts of silica fume;

[0027] Borax 16 parts

[0028] 5 parts of aluminum oxide;

[0029] 4 parts activated carbon;

[0030] 20 parts of cement;

[0031] 28 parts of stearic acid emulsion;

[0032] 3 parts of hydroxypropyl methylcellulose;

[0033] Polyacrylamide 5 parts.

[0034] The solid content of the stearic acid emulsion is 25%.

[0035] The molecular weight of the polyacrylamide is 8 million.

[0036] The method comprises the steps of:

[0037] Step 1, pulverizing gypsum, silica fume, borax, activated carbon, and cement to 250 mesh to obtain a mixed powder;

[0038] Step 2. Mix the mixed powder described in Step 1 with the stearic acid emulsion, and stir and mix at a speed of 300r / min for 2h to obtain the emulsion system A;

[0039] Step 3: Add aluminum oxide and hydroxypropyl me...

Embodiment 2

[0045] A method for preparing water-resistant gypsum board in this embodiment, the raw materials include the following components by weight:

[0046] 70 parts of gypsum;

[0047] 15 parts of silica fume;

[0048] Borax 12 parts

[0049] 4 parts of aluminum oxide;

[0050] 3 parts activated carbon;

[0051] 12 parts of cement;

[0052] 22 parts of stearic acid emulsion;

[0053] 2 parts of hydroxypropyl methylcellulose;

[0054] 3 parts polyacrylamide.

[0055] The solid content of the stearic acid emulsion is 20%.

[0056] The molecular weight of the polyacrylamide is 7 million.

[0057] The method comprises the steps of:

[0058] Step 1, pulverizing gypsum, silica fume, borax, activated carbon, and cement to 200 mesh to obtain a mixed powder;

[0059] Step 2. Mix the mixed powder described in step 1 with the stearic acid emulsion, and stir and mix for 3 hours at a speed of 200 r / min to obtain emulsion system A;

[0060] Step 3. Add aluminum oxide and hydroxypropyl ...

Embodiment 3

[0066] A method for preparing water-resistant gypsum board in this embodiment, the raw materials include the following components by weight:

[0067] 90 parts of gypsum;

[0068] 25 parts of silica fume;

[0069] Borax 18 parts

[0070] 6 parts of aluminum oxide;

[0071] 5 parts of activated carbon;

[0072] 24 parts of cement;

[0073] 32 parts of stearic acid emulsion;

[0074] 4 parts of hydroxypropyl methylcellulose;

[0075] Polyacrylamide 8 parts.

[0076] The solid content of the stearic acid emulsion is 30%.

[0077] The molecular weight of the polyacrylamide is 10 million.

[0078] The method comprises the steps of:

[0079] Step 1, pulverizing gypsum, silica fume, borax, activated carbon, and cement to 300 mesh to obtain a mixed powder;

[0080] Step 2. Mix the mixed powder described in Step 1 with the stearic acid emulsion, and stir and mix at a speed of 400r / min for 1 hour to obtain the emulsion system A;

[0081] Step 3: Add aluminum oxide and hydroxypro...

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Abstract

The invention discloses a method for preparing a water-resistant gypsum board. The method comprises the following steps: step 1, crushing gypsum, silica fume, borax, activated carbon and cement to obtain mixed powder; step 2, mixing the mixed powder obtained in the step 1 with a stearic acid emulsion, and conducting stirring and mixing to obtain an emulsion system A; step 3, adding aluminum oxide and hydroxypropyl methyl cellulose into the emulsion system A under a stirring condition, and continuing stirring after the aluminum oxide and the hydroxypropyl methyl cellulose are added so as to obtain an emulsion system B; step 4, adding polyacrylamide into the emulsion system B under a stirring condition, continuing stirring after the polyacrylamide is added, and performing natural cooling to room temperature; step 5, centrifugally separating the cooled system to obtain a water-resistant gypsum emulsion; step 6, spraying a release agent into a wallboard mold, pouring the waterproof gypsum emulsion into the wallboard mold, and successively conducting leveling, rolling at a temperature of 20-30 DEG C, and standing for 1-2 days; and step 7, drying the leveled wallboard mold, and carrying out demolding to obtain the water-resistant gypsum board.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing water-resistant gypsum boards. Background technique [0002] Gypsum is a widely used industrial material and construction material, which can be used in cement retarder, gypsum building products, model making, sulfuric acid production, paper filler, paint filler, etc. However, traditional gypsum has the disadvantage of poor water resistance due to its high solubility and many cracks and pores inside. [0003] With the rapid development of the construction industry, the speed of energy consumption and exhaustion is increasing. At the same time, due to the impact of global warming, smog and other environmental changes, the reduction of energy consumption of materials used in the construction industry and the increase of energy utilization have become the focus of this industry. . [0004] Gypsum applied to building materials usually r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/27
CPCC04B28/14C04B2111/27C04B18/146C04B14/36C04B14/303C04B14/022C04B7/00C04B24/085C04B24/383C04B24/2652
Inventor 不公告发明人
Owner 许娟
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