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Quick repairing material for magnesium phosphate cement and preparation method thereof

A magnesium phosphate cement and repair material technology, applied in the field of cement-based quick repair materials, can solve the problems of short time from mixing magnesium phosphate cement to final setting, difficulty in meeting construction operation and process requirements, and achieve excellent retarding effect and development The effect of small inhibitory effect and prolonged retardation time

Active Publication Date: 2019-05-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydration mechanism of magnesium phosphate cement is essentially an acid-base neutralization reaction, and its main active phase, magnesium oxide and phosphate, reacts very violently when it meets water. When it is short, the time from mixing to final setting of magnesium phosphate cement is extremely short, which is difficult to meet the construction operation and process requirements

Method used

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  • Quick repairing material for magnesium phosphate cement and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0027] A novel quick repair material, by parts by weight, comprises the following components:

[0028] 25 parts of magnesium oxide, 17 parts of potassium dihydrogen phosphate, 0.63 parts of ethylenediaminetetraacetic acid dipotassium salt dihydrate, and 6.3 parts of water.

[0029] Preparation:

[0030] (1) Take magnesium oxide and potassium dihydrogen phosphate, and use a cement slurry mixer to stir at a slow speed for 1min to stir and mix it evenly to obtain a uniform powder;

[0031] (2) Dissolve ethylenediaminetetraacetic acid dipotassium salt dihydrate in water, and slowly add it to the above mixture, stir slowly for 1min, then stir rapidly for 2min and put it into a 40mm×40mm×40mm mold, to be tested After the block is hardened, it can be removed from the mold to obtain a new type of rapid repair material.

Embodiment 2

[0033] A novel quick repair material, by parts by weight, comprises the following components:

[0034] 25 parts of magnesium oxide, 17 parts of potassium dihydrogen phosphate, 0.84 parts of ethylenediaminetetraacetic acid dipotassium salt dihydrate, and 6.3 parts of water.

[0035] Preparation:

[0036] (1) Take magnesium oxide and potassium dihydrogen phosphate, and use a cement slurry mixer to stir at a slow speed for 1min to stir and mix it evenly to obtain a uniform powder;

[0037] (2) Dissolve ethylenediaminetetraacetic acid dipotassium salt dihydrate in water, and slowly add it to the above mixture, stir slowly for 1min, then stir rapidly for 2min and put it into a 40mm×40mm×40mm mold, to be tested After the block is hardened, it can be removed from the mold to obtain a new type of rapid repair material.

Embodiment 3

[0039] A novel quick repair material, by parts by weight, comprises the following components:

[0040] 25 parts of magnesium oxide, 17 parts of potassium dihydrogen phosphate, 1.05 parts of ethylenediaminetetraacetic acid dipotassium salt dihydrate, 6.3 parts of water.

[0041] Preparation:

[0042] (1) Take magnesium oxide and potassium dihydrogen phosphate, and use a cement slurry mixer to stir at a slow speed for 1min to stir and mix it evenly to obtain a uniform powder;

[0043] (2) Dissolve ethylenediaminetetraacetic acid dipotassium salt dihydrate in water, and slowly add it to the above mixture, stir slowly for 1min, then stir rapidly for 2min and put it into a 40mm×40mm×40mm mold, to be tested After the block is hardened, it can be removed from the mold to obtain a new type of rapid repair material.

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Abstract

The invention discloses a quick repairing material for magnesium phosphate cement and a preparation method thereof. The quick repairing material for magnesium phosphate cement, as a composite, is mainly made from, by weight, 25 parts of magnesium oxide, 15-20 parts of monopotassium phosphate, 0.5-1.5 parts of ethylenediamine tetraacetic acid dipotassium salt dihydrate, and 5-10 parts of water. Theethylenediamine tetraacetic acid dipotassium salt dihydrate is used herein as a retardant to replace borax used in the traditional magnesium phosphate cement. The quick repairing material has good retarding effect; setting time of the magnesium phosphate repairing system is greatly extended; the magnesium phosphate repairing system ensures early strength of a magnesium phosphate cement sample, and late strength of the magnesium phosphate repairing system is improved to certain extent.

Description

technical field [0001] The invention relates to a rapid repair material for magnesium phosphate cement and a preparation method thereof, belonging to the technical field of cement-based rapid repair materials. Background technique [0002] Magnesium phosphate cement (MPC), as a new type of cementitious material, is widely used in rapid repair fields such as roads, bridge decks, and airstrips because of its rapid hardening, early strength, and small drying shrinkage deformation. The hydration mechanism of magnesium phosphate cement is essentially an acid-base neutralization reaction, and its main active phase, magnesium oxide and phosphate, reacts very violently when it meets water. When it is short, the time from mixing to final setting of magnesium phosphate cement is extremely short, which is difficult to meet the construction operation and process requirements. Therefore, in view of this situation, the development of a retarder suitable for the magnesium phosphate system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/22
Inventor 蒋金洋张傲宁冯滔滔王凤娟
Owner SOUTHEAST UNIV
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