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A kind of bottom plastering gypsum and preparation method thereof

A plastering gypsum and bottom layer technology, which is applied in the field of bottom plastering gypsum and its preparation, can solve the problems of non-gelling, idle storage, etc., and achieve the effects of no shrinkage of the coating, long operating time, and broadened utilization channels

Active Publication Date: 2021-11-26
湖南建工汇建新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a bottom plastering gypsum prepared by using well salt salt gypsum and its preparation method. By stimulating the activity of well salt salt gypsum, its hydration and hardening characteristics are improved, and the hydration rate of bottom plastering gypsum is increased. and hardening strength, which solves the problem of a large amount of idle storage of well salt salt gypsum and its non-gelling property

Method used

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  • A kind of bottom plastering gypsum and preparation method thereof

Examples

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preparation example Construction

[0047] In order to further understand the bottom plastering gypsum prepared by utilizing well salt salt gypsum in the present invention, the present invention also provides a preparation method of bottom plastering gypsum, the preparation method comprising:

[0048] Step 1, Whisker dispersion, including:

[0049] adding the whiskers to 5 parts of water, and stirring to disperse the whiskers evenly in the water to obtain a whisker dispersion;

[0050] Step 2, mixing materials, including:

[0051] Add 10-13 parts (such as 11 parts, 11.5 parts, 12 parts, 12.5 parts) of water into the container, then add retarder, water retaining agent, binder and water reducer in sequence, and stir for 0.5-3min (such as 1min , 1.5min, 2min, 2.5min) to make it disperse evenly, then add building gypsum, recycled building gypsum and cement in turn, and add 7-10 parts (such as 8 parts, 8.5 parts, 9 parts, 9.5 parts) of water again , Stir for 0.5-3min (1min, 1.5min, 2min, 2.5min) to disperse evenly,...

Embodiment 1

[0066] A method for preparing bottom plastering gypsum prepared by using well salt salt gypsum provided in this example, the raw materials used to prepare bottom plastering gypsum are composed of: 31 kg of natural sand, 25 kg of well salt salt gypsum, 30 kg of building gypsum, 2 kg of recycled building gypsum, Ordinary Portland cement 7kg, naphthalene-based water reducer 1.5kg, redispersible latex powder 1.5kg, hydroxypropyl methylcellulose ether water retaining agent 0.15kg, sodium silicate 0.5kg, whiskers 1kg, sodium pyrometaphosphate 0.12kg, sodium citrate 0.03kg.

[0067] The preparation process of the recycled building gypsum is as follows: the waste gypsum without impurities is crushed and ground for 15 minutes, then calcined at 160° C. for 3 hours, and finally aged at room temperature for 7 days to obtain the recycled building gypsum.

[0068] The preparation process of bottom plastering gypsum is as follows:

[0069] Step 1. Whisker dispersion: add the whiskers to 5kg...

Embodiment 2

[0073] This example provides a method for preparing bottom plastering gypsum prepared by using well salt salt gypsum. The raw materials used to prepare bottom plastering gypsum are: 34 kg of natural sand, 23 kg of well salt salt gypsum, 25 kg of building gypsum, 3 kg of recycled building gypsum, 7.5kg of ordinary Portland cement, 2.5kg of composite Portland cement, 2.0kg of naphthalene-based water reducer, 2.0kg of redispersible latex powder, 0.10kg of hydroxyethyl methyl cellulose ether water retaining agent, hydroxypropyl methyl Cellulose ether water retaining agent 0.10kg, sodium silicate 0.4kg, whiskers 0.6kg, sodium pyrometaphosphate 0.14kg.

[0074] The preparation process of the recycled building gypsum is as follows: the waste gypsum without impurities is crushed and ground for 20 minutes, then calcined at 170° C. for 2 hours, and finally aged at room temperature for 7 days to obtain the recycled building gypsum.

[0075] The preparation process of the bottom plasterin...

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Abstract

The invention provides a bottom plastering gypsum and a preparation method thereof. The bottom plastering gypsum comprises: 23-29 parts of salt gypsum, 24-34 parts of building gypsum, 2-4 parts of recycled building gypsum, 6-10 parts of cement, and 25 parts of sand ‑34 parts, retarder 0.14‑0.20 parts, water retaining agent 0.10‑0.20 parts, binder 1.20‑2.0 parts, water reducing agent 0.50‑2.0 parts, whiskers 0.5‑1.5 parts, sodium silicate 0.4‑0.7 parts; The preparation method includes: 1. Preparation of whisker dispersion; 2. Mixing materials, adding water into the container, and then sequentially adding retarder, water retaining agent, binder and water reducer, stirring and dispersing evenly, and then sequentially adding Building plaster, recycled building plaster, cement and salt gypsum, followed by the addition of whisker dispersions to give base plasters. The plastering gypsum prepared by the invention has good water retention, long operating time and high strength, and has good environmental and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of plastering gypsum for building walls, and in particular relates to a bottom plastering gypsum and a preparation method thereof. Background technique [0002] my country's salt chemical industry produces a large amount of well salt salt gypsum every year. The well salt salt gypsum is in the form of mud. The main component is anhydrous calcium sulfate, and it also contains a certain amount of sodium chloride, magnesium chloride and other substances. The factory area or illegal discharge not only has great environmental and water pollution risks, but also occupies a large amount of land, resulting in a reduction in the usable land area, which has increasingly become a bottleneck for the development of the salt chemical industry. Active stimulation of well salt gypsum can greatly increase its hydration rate in a short period of time, and can be used instead of natural gypsum. [0003] With the rapid developme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
CPCC04B28/142C04B2111/00482C04B2201/10C04B2201/50C04B14/06C04B7/02C04B22/00C04B24/383C04B22/16C04B24/06C04B2103/0057C04B2103/302C04B14/383C04B7/00
Inventor 李志新王继娜张建武徐开东马先伟牛季收金彪徐卓越杨欢包云
Owner 湖南建工汇建新材料科技有限公司