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Preparation method of water-resistant gypsum emulsion

A technology of water resistance and gypsum, applied in the field of building materials, can solve the problems of poor water resistance and high solubility, and achieve the effect of long-term water resistance, simple composition and saving raw materials

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

AI Technical Summary

Problems solved by technology

However, traditional gypsum has the defect of poor water resistance due to its high solubility and many cracks and pores inside.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of water-resistant gypsum emulsion of the present embodiment, raw material comprises the component of following parts by weight:

[0022] 80 parts of gypsum;

[0023] 20 parts of silica fume;

[0024] 16 parts of borax

[0025] 5 parts of aluminum oxide;

[0026] 4 parts activated carbon;

[0027] 20 parts of cement;

[0028] 28 parts of stearic acid emulsion;

[0029] 3 parts of hydroxypropyl methylcellulose;

[0030] 5 parts polyacrylamide.

[0031] The solid content of the stearic acid emulsion is 25%.

[0032] The molecular weight of the polyacrylamide is 8 million.

[0033] The method comprises the steps of:

[0034] Step 1. Mix gypsum, silica fume, borax, activated carbon, cement and stearic acid emulsion, and stir and mix at a speed of 300r / min for 2 hours to obtain emulsion system A;

[0035] Step 2. Add aluminum oxide and hydroxypropyl methylcellulose to the emulsion system A described in step 1 under the condition of stir...

Embodiment 2

[0039] A kind of preparation method of water-resistant gypsum emulsion of the present embodiment, raw material comprises the component of following parts by weight:

[0040] 70 parts of gypsum;

[0041] 15 parts of silica fume;

[0042] 12 parts borax

[0043] 4 parts of aluminum oxide;

[0044] 3 parts activated carbon;

[0045] 12 parts of cement;

[0046] 22 parts of stearic acid emulsion;

[0047] 2 parts of hydroxypropyl methylcellulose;

[0048] 3 parts polyacrylamide.

[0049] The solid content of the stearic acid emulsion is 20%.

[0050] The molecular weight of the polyacrylamide is 7 million.

[0051] The method comprises the steps of:

[0052] Step 1. Mix gypsum, silica fume, borax, activated carbon, cement and stearic acid emulsion, and stir and mix for 3 hours at a speed of 200r / min to obtain emulsion system A;

[0053] Step 2. Add aluminum oxide and hydroxypropyl methylcellulose to the emulsion system A described in step 1 under the condition of stirrin...

Embodiment 3

[0057] A kind of preparation method of water-resistant gypsum emulsion of the present embodiment, raw material comprises the component of following parts by weight:

[0058] 90 parts of gypsum;

[0059] 25 parts of silica fume;

[0060] Borax 18 parts

[0061] 6 parts of aluminum oxide;

[0062] 5 parts of activated carbon;

[0063] 24 parts of cement;

[0064] 32 parts of stearic acid emulsion;

[0065] 4 parts of hydroxypropyl methylcellulose;

[0066] 8 parts of polyacrylamide.

[0067] The solid content of the stearic acid emulsion is 30%.

[0068] The molecular weight of the polyacrylamide is 10 million.

[0069] The method comprises the steps of:

[0070] Step 1. Mix gypsum, silica fume, borax, activated carbon, cement and stearic acid emulsion, and stir and mix at a speed of 400r / min for 1 hour to obtain emulsion system A;

[0071] Step 2. Add aluminum oxide and hydroxypropyl methylcellulose to the emulsion system A described in step 1 under the condition of s...

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Abstract

The invention discloses a preparation method of a water-resistant gypsum emulsion. The preparation method comprises the following steps: step 1, mixing gypsum, silica fume, borax, activated carbon, cement and a stearic acid emulsion, and conducting stirring and mixing for 1-3 h to obtain an emulsion system A; step 2, adding aluminum oxide and hydroxypropyl methyl cellulose into the emulsion system A obtained in the step 1 under a stirring condition at 60-80 DEG C, and continuing stirring after the aluminum oxide and the hydroxypropyl methyl cellulose are added so as to obtain an emulsion system B; step 3, adding polyacrylamide into the emulsion system B obtained in the step 2 under a stirring condition at 85-95 DEG C, continuing stirring after the polyacrylamide is added, and performing natural cooling to room temperature; and step 4, centrifugally separating the system after cooling in the step 3 to obtain the water-resistant gypsum emulsion. The gypsum emulsion prepared by the method disclosed by the invention has stable and long-lasting water resistance, can be applied to the building industry, is simple in components and low in cost, and can effectively save raw materials and protect the environment.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of water-resistant gypsum emulsion. 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 usuall...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/27
CPCC04B28/14C04B2111/27C04B18/146C04B22/0013C04B14/303C04B14/022C04B7/00C04B24/085C04B24/383C04B24/2652
Inventor 不公告发明人
Owner 许娟
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