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Magnesium cement with high water resistance and preparation method thereof

A magnesium cement, water-based technology, applied in the field of high water-resistant magnesium cement and its preparation, can solve the problems of low water resistance of cement, achieve the effects of improving water resistance, compact structure, and reducing supersaturation

Inactive Publication Date: 2018-02-23
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that when cement is prepared by the traditional method, due to the difference in the specific gravity of the amount of raw material and the amount of organic acid and chemical reagent mixed in, the water resistance of the prepared cement is low, and a high water resistance is provided. Water-based magnesium cement and preparation method thereof, thereby solving the above problems

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  • Magnesium cement with high water resistance and preparation method thereof

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Embodiment 1

[0023] A high water-resistance magnesium cement is characterized in that it is made of the following raw materials: light-burned magnesia powder, magnesium sulfate and magnesium chloride mixture, water, potassium dihydrogen phosphate, the light-burned magnesia powder, magnesium sulfate and The mass ratio of magnesium chloride mixture to water is 14.5:1:22, wherein the mass ratio of magnesium chloride to the mixture is 0, the content of active magnesium oxide in the light-burned magnesium oxide powder is 60%, potassium dihydrogen phosphate The content is 0.5% of the mass of light-burned magnesia powder.

[0024] The preparation method of described high water resistance cement comprises the following steps:

[0025] S1: raw material weighing;

[0026] S2: weighing each raw material according to the quality of the raw material;

[0027] S3: dissolving the magnesium sulfate and magnesium chloride mixture in water;

[0028] S4: Incorporation of potassium dihydrogen phosphate;

...

Embodiment 2

[0035] A high water-resistant magnesium cement is characterized in that it is made of the following raw materials: light-burned magnesia powder, a mixture of magnesium sulfate and magnesium chloride, water, the light-burned magnesia powder, a mixture of magnesium sulfate and magnesium chloride, water, The substance ratio of potassium dihydrogen phosphate is: 14.5:1:22, wherein magnesium chloride accounts for 30% of the substance ratio of the mixture, the content of active magnesium oxide in the light-burned magnesium oxide powder is 60%, dihydrogen phosphate The content of potassium is 0.5% of the mass of light-burned magnesia powder.

[0036] The preparation method of described high water resistance cement comprises the following steps:

[0037] S1: raw material weighing;

[0038] S2: weighing each raw material according to the quality of the raw material;

[0039] S3: dissolving the magnesium sulfate and magnesium chloride mixture in water;

[0040] S4: Incorporation of p...

Embodiment 3

[0047] A high water-resistance magnesium cement is characterized in that it is made of the following raw materials: light-burned magnesia powder, magnesium sulfate and magnesium chloride mixture, water, potassium dihydrogen phosphate, the light-burned magnesia powder, magnesium sulfate and The mass ratio of the magnesium chloride mixture to water is 14.5:1:22, wherein magnesium chloride accounts for 50% of the mass of the mixture, the content of active magnesium oxide in the light-burned magnesium oxide powder is 60%, dihydrogen phosphate The content of potassium is 0.5% of the mass of light-burned magnesia powder.

[0048] The preparation method of described high water resistance cement comprises the following steps:

[0049] S1: raw material weighing;

[0050] S2: weighing each raw material according to the quality of the raw material;

[0051] S3: dissolving the magnesium sulfate and magnesium chloride mixture in water;

[0052] S4: Incorporation of potassium dihydrogen ph...

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Abstract

The invention discloses magnesium cement with high water resistance and a preparation method thereof. The magnesium cement with high water resistance is prepared from the following raw materials: light calcined magnesia powder, a mixture of magnesium sulfate and magnesium chloride, water and monopotassium phosphate, wherein the content of active magnesium oxide in the light calcined magnesia powder is 60%; the content of the monopotassium phosphate accounts for 0.1-1% of the mass of the light calcined magnesia powder. The preparation method of the magnesium cement with high water resistance comprises the following steps: S1, weighing raw materials; S2, weighing chemical reagents according to the masses of the raw materials; S3, dissolving the magnesium sulfate in water; S4, adding the chemical reagents; S5, mixing the light calcined magnesia powder with a magnesium sulfate mixed liquid, and sufficiently stirring to form slurry, thereby obtaining the magnesium cement with high water resistance. Due to adoption of a mixed system of magnesium sulfate and magnesium chloride, and the monopotassium phosphate, the water resistance of the cement is improved, and the cement is remarkable ineffect and very good in application prospect.

Description

technical field [0001] The invention relates to the technical field of cement preparation, in particular to a high water-resistance magnesium cement and a preparation method thereof. Background technique [0002] Magnesium oxysulfide cement is a kind of magnesite cement. Magnesium oxysulfide cement avoids the hidden danger of manufacturers paying for moisture absorption and brine return of magnesium oxychloride cement, but magnesium oxysulfide cement also has the disadvantage of poor water resistance without modification. . Cement hydration is a complex, heterogeneous heterogeneous chemical reaction process. No matter what kind of cement, it has "immediacy" in the hydration process. It is because of this "immediacy" that the hydration mechanism and kinetic parameters of cement are different in different hydration stages, mainly reflected in the water The heat release, hydration rate, electrical properties and volume changes, and the small differences in various doping comp...

Claims

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Application Information

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IPC IPC(8): C04B9/06
CPCC04B9/06
Inventor 李颖肖学英文静董金美常成功郑卫新
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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