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High-performance potassium magnesium phosphate cement

A technology of potassium magnesium phosphate cement and potassium magnesium phosphate, which is applied in the field of high performance potassium magnesium phosphate cement and can solve the problems of poor workability and rapid initial setting of potassium magnesium phosphate cement.

Inactive Publication Date: 2018-01-16
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the purpose of this invention is to propose a high-performance potassium magnesium phosphate cement, which solves the problems of rapid initial setting and poor workability of potassium magnesium phosphate cement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] First prepare potassium magnesium phosphate cement powder: take 90 mass parts of perburned magnesium oxide MgO (Yancheng Huanai Magnesium Industry Co., Ltd., industrial pure grade) and 40 mass parts of potassium dihydrogen phosphate KH 2 PO 4 (Lianyungang Guansu Industrial Co., Ltd., chemically pure grade, purity ≥ 99.0%), it is placed in the dry mixer container successively, then under stirring at 600 rpm, gradually add 3 parts by mass of composite retarder, and wait until completely After the addition, stirring was continued for 3 minutes. Composite retarder made of borax Na 2 B 4 o 7 10H 2 O (Jinan Dewang Chemical Co., Ltd., chemically pure grade, purity ≥ 99.0%, relative molecular mass 381.42) and anhydrous acetic acid CH 3 COOH (Jinan Haoran Chemical Technology Co., Ltd., chemically pure grade, purity ≥ 99.0%, relative molecular mass 60.05) is prepared by mixing with a mass ratio of 10:1.

[0014] Next, take 100 parts by mass of the potassium magnesium phosph...

Embodiment 2

[0020] First prepare potassium magnesium phosphate cement powder: take 100 mass parts perburned magnesium oxide MgO (Yancheng Huanai Magnesium Industry Co., Ltd., industrial pure grade) and 50 mass parts potassium dihydrogen phosphate KH 2 PO 4 (Lianyungang Guansu Industrial Co., Ltd., chemically pure grade, purity ≥ 99.0%), it is placed in a dry mixer container successively, and then under stirring at 1000 rpm, gradually add 5 parts by mass of composite retarder, and wait until completely After the addition, stirring was continued for 2 minutes. Composite retarder made of borax Na 2 B 4 o 7 10H 2 O (Jinan Dewang Chemical Co., Ltd., chemically pure grade, purity ≥ 99.0%, relative molecular mass 381.42) and anhydrous acetic acid CH 3 COOH (Jinan Haoran Chemical Technology Co., Ltd., chemically pure grade, purity ≥ 99.0%, relative molecular mass 60.05) is prepared by mixing with a mass ratio of 10:1.

[0021] Next, take 100 parts by mass of the potassium magnesium phosphat...

Embodiment 3

[0027] First prepare potassium magnesium phosphate cement powder: take 110 mass parts perburned magnesium oxide MgO (Yancheng Huanai Magnesium Industry Co., Ltd., industrial pure grade) and 60 mass parts potassium dihydrogen phosphate KH 2 PO 4 (Lianyungang Guansu Industrial Co., Ltd., chemically pure grade, purity ≥ 99.0%), it is placed in a dry mixer container successively, and then under stirring at 1500 rpm, gradually add 7 parts by mass of composite retarder, and wait until completely After the addition, stirring was continued for 1 minute. Composite retarder made of borax Na 2 B 4 o 7 10H 2 O (Jinan Dewang Chemical Co., Ltd., chemically pure grade, purity ≥ 99.0%, relative molecular mass 381.42) and anhydrous acetic acid CH 3 COOH (Jinan Haoran Chemical Technology Co., Ltd., chemically pure grade, purity ≥ 99.0%, relative molecular mass 60.05) is prepared by mixing with a mass ratio of 10:1.

[0028] Next, take 100 parts by mass of the potassium magnesium phosphate...

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Abstract

The invention provides high-performance potassium magnesium phosphate cement. According to a formula, the cement is prepared from the following ingredients: overburnt magnesium oxide, monopotassium phosphate and a compound retarder, wherein a mass ratio of the overburnt magnesium oxide to the monopotassium phosphate to the compound retarder is (90 to 110) : (40 to 60) : (3 to 7); and the compoundretarder contains borax and anhydrous acetic acid, wherein a mass ratio of the borax to the anhydrous acetic acid is 10 to 1. By rationally controlling the adulterate amount of the compound retarder,the initial setting time of the high-performance potassium magnesium phosphate cement is controlled within 30-60min, the heat of hydration is released by stages, and the problems that the initial settting of the potassium magnesium phosphate cement is rapid and the workability is poor are solved.

Description

technical field [0001] The invention relates to the field of preparation methods of potassium magnesium phosphate cement, in particular to a high-performance potassium magnesium phosphate cement. Background technique [0002] Magnesium phosphate cement is a new type of inorganic cementitious material formed by mixing burnt magnesium oxide and phosphate with water at room temperature. Magnesium phosphate cement has the advantages of high early strength, strong temperature adaptability, small volume deformation, strong adhesion, wear resistance, and frost resistance, so it can be widely used in repairing concrete structures, structural coatings, and as matrix materials for composite materials. . But at the same time, ammonium dihydrogen phosphate is generally used as the acidic component in magnesium phosphate cement. During the reaction process with magnesium oxide and water, a large amount of ammonia gas is released, which not only pollutes the environment, but also is not ...

Claims

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Application Information

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IPC IPC(8): C04B12/02C04B28/34
Inventor 王宏光邢志强王锐
Owner NORTHEAST FORESTRY UNIVERSITY
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