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Magnesium-based light fireproof inorganic cementing material and preparation method thereof

An inorganic gelling material, lightweight technology, applied in the field of materials, can solve the problems of limited application and promotion, poor water resistance, moisture absorption and brine return, and achieve the effect of speeding up the reaction process, reducing production time, and good dispersion

Inactive Publication Date: 2021-02-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of free magnesium chloride (f-MgCl2) in the magnesium oxychloride cement system, it is easy to deliquesce, has disadvantages such as poor water resistance, moisture absorption and brine return, etc., resulting in poor performance, which limits its application and promotion.

Method used

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  • Magnesium-based light fireproof inorganic cementing material and preparation method thereof
  • Magnesium-based light fireproof inorganic cementing material and preparation method thereof
  • Magnesium-based light fireproof inorganic cementing material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] A method for preparing a magnesium-based lightweight fireproof inorganic gelling material, comprising the following steps:

[0030] S1. Dissolve 20 parts of magnesium chloride hexahydrate and 12 parts of water, and ultrasonically disperse to obtain a magnesium chloride solution; then add 4 parts of basic magnesium chloride to the magnesium chloride solution, and obtain solution A after ultrasonic dispersion;

[0031] S2. Mix polyvinyl alcohol and water with a mass ratio of 3:97 to obtain a polyvinyl alcohol solution with a mass fraction of 3%; take 6 parts of the polyvinyl alcohol solution and add it to solution A, and mix well to obtain solution B;

[0032] S3. Add 0.5 parts of sodium hexametaphosphate to solution B, and ultrasonically disperse to dissolve it to obtain solution C;

[0033] S4. Mix 20 parts of light magnesium oxide with solution C, and use a slurry mixer to stir evenly to obtain cement slurry;

[0034] S5. Pour the cement slurry into the cement mortar ...

Embodiment 2

[0037] A method for preparing a magnesium-based lightweight fireproof inorganic gelling material, comprising the following steps:

[0038] S1. Dissolve 20 parts of magnesium chloride hexahydrate and 12 parts of water, and ultrasonically disperse to obtain a magnesium chloride solution; then add 4 parts of basic magnesium chloride to the magnesium chloride solution, and obtain solution A after ultrasonic dispersion at a constant temperature;

[0039] S2. Mix polyvinyl alcohol and water with a mass ratio of 3:97 to obtain a polyvinyl alcohol solution with a mass fraction of 3%; take 6 parts of the polyvinyl alcohol solution and add it to solution A, and mix well to obtain solution B;

[0040] S3. Add 0.5 parts of sodium hexametaphosphate to solution B, and ultrasonically disperse to dissolve it to obtain solution C;

[0041] S4. Stir and mix 20 parts of light magnesium oxide and 10 parts of foam glass powder to obtain mixed powder, mix the mixed powder with solution C, and use a...

Embodiment 3

[0044] A method for preparing a magnesium-based lightweight fireproof inorganic gelling material, comprising the following steps:

[0045] S1. Dissolve 20 parts of magnesium chloride hexahydrate with 15 parts of water, and ultrasonically disperse to obtain a magnesium chloride solution; then add 6 parts of basic magnesium chloride to the magnesium chloride solution, and obtain solution A after ultrasonic dispersion at a constant temperature;

[0046] S2. Mix polyvinyl alcohol and water with a mass ratio of 3:97 to obtain a polyvinyl alcohol solution with a mass fraction of 3%; take 6 parts of the polyvinyl alcohol solution and add it to solution A, and mix well to obtain solution B;

[0047]S3. Add 0.8 parts of sodium hexametaphosphate to solution B, and ultrasonically disperse to dissolve it to obtain solution C;

[0048] S4. Stir and mix 30 parts of light magnesium oxide and 15 parts of foam glass powder to obtain mixed powder, mix the mixed powder with solution C, and use a...

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Abstract

The invention discloses a magnesium-based light fireproof inorganic cementing material and a preparation method thereof. The preparation method of the material comprises the following steps: preparinga magnesium chloride solution, adding basic magnesium chloride into the magnesium chloride solution, and obtaining a solution A after uniform dispersion; sequentially adding a polyvinyl alcohol solution and sodium hexametaphosphate into the solution A to obtain a solution C; uniformly mixing magnesium oxide and an inorganic filler to obtain a mixture, adding the mixture into the solution C, and uniformly stirring to obtain cement slurry; and curing the cement slurry to obtain a final product. According to the invention, basic magnesium chloride is added as a reaction buffer body, the basic magnesium chloride can be decomposed to generate magnesium oxide, the hydration reaction consumes magnesium chloride in the solution, and the existence of f-MgCl2 is reduced, so that the phenomena of moisture absorption and halogenation of the material are reduced. Meanwhile, inorganic fillers such as foamed glass powder are used for filling, so that the material is light in weight, fireproof and flame-retardant; curing is conducted at the temperature of 40-60 DEG C through a drying oven, the reaction process is accelerated while sufficient reaction is guaranteed, the production time is shortened, and industrial application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a magnesium-based lightweight fireproof inorganic gelling material and a preparation method thereof. Background technique [0002] Most of the architectural decorative panels currently on the market in China, such as solid wood panels and PVC panels, are combustible or combustible materials. Their large-scale use has buried hidden dangers for the fire safety of the building interior. It has brought huge losses; what is more serious is that some organic decorative panels not only support combustion in a fire, but also release a large amount of toxic chemical gas, which brings direct poisoning. [0003] Therefore, in recent years, the research and improvement of fire-resistant boards is particularly necessary. The needs of the market and industrial production make the boards need to have the characteristics of rapid prototyping, environmental protection, flame retarda...

Claims

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Application Information

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IPC IPC(8): C04B28/32C04B24/26C04B22/16C04B111/40C04B111/28
CPCC04B22/16C04B24/2623C04B28/32C04B2111/28C04B2111/40C04B2201/50C04B14/24C04B24/383C04B14/185C04B18/08
Inventor 刘岗王丰景齐鹏飞袁春燕郑康张献田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI