Preparation method of magnesium oxysulfate cementing material adopting silicon dioxide aerogel and building component

A technology of magnesium oxysulfide gelling material and silicon dioxide, which is applied in the field of building materials, can solve the problems of lack of adding airgel, heat insulation, insufficient formation of heat preservation, weakening of material mechanical properties, etc., and achieve good economic and social significance , excellent mechanical properties and thermal insulation properties, and long service life

Active Publication Date: 2022-01-28
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the preparation of existing magnesium oxysulfide gelling materials, there is a lack of methods and related researches for adding airgel; resulting in insufficient heat insulation and heat preservation of existing magnesium oxysulfide gelling materials. Adding airgel to the gelling material will easily lead to the weakening of the mechanical properties of the material. Therefore, it is necessary to conduct in-depth research on the addition process of airgel and related modifiers in the magnesium oxysulfide gelling material.

Method used

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  • Preparation method of magnesium oxysulfate cementing material adopting silicon dioxide aerogel and building component
  • Preparation method of magnesium oxysulfate cementing material adopting silicon dioxide aerogel and building component
  • Preparation method of magnesium oxysulfate cementing material adopting silicon dioxide aerogel and building component

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Embodiment 1

[0037] This embodiment relates to a magnesium oxysulfide gelling material using silica airgel, which helps to improve the mechanical properties and thermal insulation properties of magnesium oxysulfide gelling building materials. The magnesium oxysulfate gel using silica airgel includes A component and B component, wherein:

[0038] Component A is proportioned by molar ratio, including 1 part of magnesium sulfate heptahydrate, 8-12 parts of light-burned magnesia and 15-22 parts of water; and the content of active magnesia in light-burned magnesia is 55%-65% .

[0039] The B component includes modifiers and aerogels. Among them, the modifier is one of citric acid, tartaric acid and sodium malate, or a mixture of citric acid and tartaric acid; the amount of various modifiers is: citric acid is 0.7%~0.8% of the mass of light-burned magnesium oxide , tartaric acid and sodium malate are 1.3% to 1.8% of the mass of light-burned magnesia. The amount of airgel is less than 6% of th...

Embodiment 2

[0048] This embodiment relates to a preparation method of magnesium oxysulfate gelling material using silica airgel and building components, which is convenient for operation and implementation in construction, and can generate sulfur oxide with excellent mechanical properties and thermal insulation properties. Magnesium gelling material.

[0049] This method is used in the preparation of the magnesium oxysulfate gelled material that adopts silica aerogel provided in Example 1, and comprises the following steps:

[0050] s1. According to the proportioning, magnesium sulfate heptahydrate and water are formulated into a magnesium sulfate heptahydrate solution, and the modifier and aerogel are poured into the magnesium sulfate heptahydrate solution and fully stirred to form a mixed solution;

[0051] s2. Add the light-burned magnesia required by the proportioning ratio into the mixed solution, and fully stir to form a slurry with uniform viscosity;

[0052] s3. Inject the slurry...

Embodiment 21

[0067] The magnesium oxysulfate gelling material of the present embodiment adopts the following ratio: wherein the molar ratio of light-burned magnesium oxide powder, magnesium sulfate heptahydrate, and water is 10:1:18, and the active magnesium oxide in the light-burned magnesium oxide powder The content is 57.8%. Modifier adopts citric acid, tartaric acid and sodium malate to carry out respectively, and form three groups of embodiment products; Wherein, the content of citric acid is 0.75% of the quality of light-burned magnesium oxide powder, forms grouping 1 product; The content of tartaric acid is light The content of sodium malate is 1.5% of the mass of lightly burned magnesia powder, forming the product of group 2.

[0068] In this embodiment, the corrugated tile and ridge tile (JC / T747-2002) of glass fiber magnesium cementitious materials can be referred to as the detection standard, and the flexural strength, compressive strength, and thermal conductivity are measured ...

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Abstract

The invention provides a magnesium oxysulfate cementing material adopting silicon dioxide aerogel, a preparation method of the magnesium oxysulfate cementing material and a building component. The magnesium oxysulfate cementing material adopting the silicon dioxide aerogel comprises a component A and a component B, wherein the component A comprises, by mole, 1 part of magnesium sulfate heptahydrate, 8-12 parts of light calcined magnesia and 15-22 parts of water, and the content of active magnesium oxide in the light calcined magnesia ranges from 55% to 65%; the component B comprises a modifier and aerogel; the modifier is one of citric acid, tartaric acid and sodium malate or a mixture of the citric acid and the tartaric acid, the citric acid accounts for 0.7%-0.8% of the mass of the light calcined magnesia, and the tartaric acid and the sodium malate both account for 1.3%-1.8% of the mass of the light calcined magnesia; and the mass of the aerogel is 6% or less of that of the light calcined magnesia. According to the magnesium oxysulfate cementing material adopting the silicon dioxide aerogel, the mechanical property and the thermal insulation property of the magnesium oxysulfate cementing material can be improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of a magnesium oxysulfide gelling material using silica airgel. In addition, the invention also relates to a building element. Background technique [0002] As a new building material, magnesium oxysulfate cementitious material is mainly made by mixing light-burned magnesium oxide and magnesium sulfate heptahydrate solution. It has light weight, good volume stability, high flexural strength, fire resistance, thermal insulation and other properties. The application is more and more extensive. The difference of various components will have a significant impact on the performance of the magnesium oxysulfide gelling material; and when preparing the magnesium oxysulfide gelling material, due to the different molar specific gravity of the raw material and the different amount of the chemical reagent mixed in, the obtained sulfur The physical properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/30C04B14/06
CPCC04B28/30C04B14/064C04B2201/50C04B2201/32C04B24/06Y02W30/91
Inventor 赵莹刘继雅车擎宇赵雅茹王静张晓龙徐晓阳张向京
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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