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Magnesium oxychloride cement and preparation method thereof

A technology of magnesium oxychloride cement and light-burned magnesia, which is applied in the direction of manufacturing tools and ceramic molding machines, can solve the problems of mechanical property damage, achieve the effects of reducing crack formation, excellent water resistance and strength, and improving mechanical properties

Active Publication Date: 2020-11-17
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the internal stress generated after the addition of acid radical ions promotes the formation of cracks, it damages the mechanical properties

Method used

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  • Magnesium oxychloride cement and preparation method thereof
  • Magnesium oxychloride cement and preparation method thereof
  • Magnesium oxychloride cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dissolving 0.63 parts by mass of phytic acid in 126 parts by mass of water, and stirring evenly at 25±2°C to form an aqueous solution of phytic acid;

[0036] (2) 205 parts by mass of magnesium chloride hexahydrate are added to the phytic acid aqueous solution prepared in (1), and stirred evenly;

[0037] (3) 315 parts by mass of lightly burned heavy magnesium oxide are then added to the mixed solution obtained in step (2), and stirred for 5 minutes to form a uniform cement slurry;

[0038] (4) pour into the mold and vibrate, and release the mold after curing for 24 hours under the condition of 25±2°C;

[0039] (5) Curing at 25±2°C for 28 days after demoulding to obtain organic-inorganic hybrid modified high-performance magnesium oxychloride cement.

Embodiment 2

[0041] (1) Dissolving 1.26 parts by mass of phytic acid in 126 parts by mass of water, and stirring evenly at 25±2°C to form an aqueous solution of phytic acid;

[0042] (2) 205 parts by mass of magnesium chloride hexahydrate are added to the phytic acid aqueous solution prepared in (1), and stirred evenly;

[0043] (3) 315 parts by mass of lightly burned heavy magnesium oxide are then added to the mixed solution obtained in step (2), and stirred for 5 minutes to form a uniform cement slurry;

[0044] (4) pour into the mold and vibrate, and release the mold after curing for 24 hours under the condition of 25±2°C;

[0045] (5) Curing at 25±2°C for 28 days after demoulding to obtain organic-inorganic hybrid modified high-performance magnesium oxychloride cement.

Embodiment 3

[0047] (1) Dissolving 1.9 parts by mass of phytic acid in 126 parts by mass of water, stirring evenly at room temperature to form an aqueous solution of phytic acid;

[0048] (2) 205 parts by mass of magnesium chloride hexahydrate are added to the phytic acid aqueous solution prepared in (1), and stirred evenly;

[0049] (3) 315 parts by mass of lightly burned heavy magnesium oxide are then added to the mixed solution obtained in step (2), and stirred for 5 minutes to form a uniform cement slurry;

[0050] (4) pour into the mold and vibrate, and release the mold after curing for 24 hours under the condition of 25±2°C;

[0051] (5) Curing at 25±2°C for 28 days after demoulding to obtain organic-inorganic hybrid modified high-performance magnesium oxychloride cement.

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PUM

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Abstract

The invention belongs to the technical field of inorganic cementing materials, and particularly relates to magnesium oxychloride cement and a preparation method thereof. The magnesium oxychloride cement contains a magnesium ligand complex, the magnesium ligand complex contains Mg2+ and a cyclic ligand coordinated to the Mg2+, and the cyclic ligand contains at least two independent electron donating atoms selected from phosphorus and oxygen. The magnesium oxychloride cement is preferably prepared from the following raw materials in parts by mass: 300-440 parts of light calcined magnesium oxide,195-210 parts of magnesium chloride hexahydrate, 120-130 parts of water and 0.6-3.6 parts of phytic acid. The magnesium oxychloride cement has excellent water resistance and strength, and is wide inraw material source and easy for industrial application.

Description

technical field [0001] The invention belongs to the technical field of inorganic gelling materials, and in particular relates to a magnesium oxychloride cement and a preparation method thereof. Background technique [0002] Magnesium oxychloride cement is a low-carbon cement. Compared with the Portland cement most commonly used in construction, magnesium oxychloride cement has the advantages of low alkalinity, high strength, air hardness and environmental protection. In addition, the application of magnesium oxychloride cement can increase the added value of magnesium chloride, a waste of potash fertilizer industry, and reduce its harm to the environment. With the development of economy and science and technology, this green and environmentally friendly cement has become a development trend. However, the poor water resistance of magnesium oxychloride cement greatly limits its application. [0003] Poor water resistance of magnesium oxychloride cement and its strength phase...

Claims

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Application Information

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IPC IPC(8): C04B28/32B28B1/087
CPCB28B1/087C04B28/32C04B2201/50C04B24/003
Inventor 李建章叶倩倩韩宇飞高强龚珊珊
Owner BEIJING FORESTRY UNIVERSITY
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