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Hydrated magnesium silicate-based cementing material containing magnesium oxysulfate-based waste and preparation method of hydrated magnesium silicate-based cementing material

A technology of magnesium oxysulfate-based waste and magnesium oxysulfate-based waste, applied in the field of building materials, can solve problems such as waste of magnesium oxysulfate-based waste resources, and achieve important economic and environmental significance, excellent performance, and strong fluidity. Effect

Active Publication Date: 2021-11-09
辽宁科大中驰镁建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a hydrated magnesium silicate-based cementitious material containing magnesium oxysulfide-based waste and a preparation method thereof, so as to solve the problem of waste resources of magnesium oxysulfide-based waste in the prior art. "Energy saving and emission reduction", reduce carbon dioxide emissions, reduce environmental pollution,

Method used

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  • Hydrated magnesium silicate-based cementing material containing magnesium oxysulfate-based waste and preparation method of hydrated magnesium silicate-based cementing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw material composition is: 714.3g of light-burned magnesium oxide powder, 1000g of silica fume, 785.7g of water, 28.6g of sodium hexametaphosphate, 10.7g of tartaric acid, and 171.4g of magnesium oxysulfide-based waste.

[0025] The preparation method comprises the following steps:

[0026] (1) Waste treatment: remove impurities from the magnesium oxysulfate-based waste, then crush, grind, and sieve to obtain powder with a particle size of 180-200 mesh;

[0027] (2) Dry blending of raw materials: Take light-burned magnesia powder and silica fume in the entire formula, and carry out stirring and dry blending to obtain a dry blend;

[0028] (3) Reagent dissolution: Take all the sodium hexametaphosphate and tartaric acid in the formula and stir them with water to fully dissolve them to obtain a solution;

[0029] (4) Solid-liquid mixing: add the dry mixture prepared in step (2) to the solution prepared in step (3), stir and mix well, and stir according to GB / T9142-1...

Embodiment 2

[0032] The raw materials are as follows: 600g of lightly burned magnesia powder, 1200g of silica fume, 800g of water, 26g of sodium hexametaphosphate, 7.5g of citric acid, and 100g of magnesium oxysulfate-based waste.

[0033] The preparation method is the same as in Example 1.

Embodiment 3

[0035] The raw material composition is: 675g of lightly burned magnesia powder, 1020g of silica fume, 825g of water, 22.5g of sodium hexametaphosphate, 8g of citric acid, and 120g of magnesium oxysulfide-based waste.

[0036] The preparation method is the same as in Example 1.

[0037] In the above-mentioned embodiments, the magnesium oxysulfide-based waste material is any one or any combination of two or more of the scraps in the production process of magnesium oxysulfide wallboards, discarded magnesium oxysulfide wallboards, and discarded magnesium oxysulfide insulation boards. The particle size of magnesium oxysulfide-based waste after crushing and grinding is 180-200 mesh. The main components of magnesium oxysulfide-based waste are by weight percentage: 25%-40% for Mg(OH)2, 30%-40% for 5Mg(OH)2-MgSO4-7H2O, 5%-15% for MgO, and 5%-15% for MgCO3 3%-9%. The activity of light-burned magnesium oxide powder measured by water method is not less than 72%, the particle size is 180...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a hydrated magnesium silicate-based cementing material containing magnesium oxysulfate-based waste and a preparation method of the hydrated magnesium silicate-based cementing material. The hydrated magnesium silicate-based cementing material comprises the following raw materials: 30-50 parts of light calcined magnesia powder, 60-75 parts of silica fume, 45-70 parts of water, 1-2 parts of a water reducer, 0.25-0.75 part of a retarder, and 5-12 parts of magnesium oxysulfate-based waste. The magnesium oxysulfate-based waste is any one or a combination of any two or more of leftover materials in the production process of magnesium oxysulfate wallboards, waste magnesium oxysulfate wallboards and waste magnesium oxysulfate insulation boards. The cementing material has the advantages of good fluidity, small shrinkage deformation, high strength and the like; and meanwhile, the problems that the magnesium oxysulfate-based waste is difficult to treat and process, low in utilization rate and the like can be effectively solved. The magnesium oxysulfate-based waste material is adopted, so that the product cost is reduced, the adverse effect of solid waste on the environment is reduced, meanwhile, the development of the magnesite industry in the future is greatly influenced, and comprehensive utilization and even efficient utilization of resources are really realized.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a hydrated magnesium silicate-based gelling material containing magnesium oxysulfide-based waste and a preparation method thereof. Background technique [0002] At present, the construction industry has become one of the pillar industries of our country, and with the rapid development of the economy and society, it has become an increasingly important industry. The construction process is a process of dismantling the old and building the new. In this process, a large amount of construction waste is bound to be generated. At present, hundreds of millions of tons of construction waste are generated every year, and the trend is increasing year by year. Improper disposal of construction waste materials will not only lead to damage to the ecological environment, but more importantly, the utilization rate of resources and energy will be low. With the requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/30
CPCC04B28/30C04B2201/50C04B18/146C04B2103/302C04B2103/22
Inventor 毕万利段文涵李晶关岩滕莹雪孙美硕
Owner 辽宁科大中驰镁建材科技有限公司
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