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A kind of admixture for magnesium phosphate cement repair mortar and preparation method thereof

A technology of magnesium phosphate cement and repair mortar, which is applied in the field of building materials, can solve the problems of limited water resistance of magnesium phosphate cement, and achieve the effects of compensating for the reduction in strength, improving thermal insulation, and reducing porosity in the later stage

Active Publication Date: 2022-04-05
北京建工新型建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although slag has the effect of improving water resistance, as a mineral admixture, its main function is to enhance the strength of magnesium phosphate cement, and its effect on improving the water resistance of magnesium phosphate cement is limited

Method used

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  • A kind of admixture for magnesium phosphate cement repair mortar and preparation method thereof
  • A kind of admixture for magnesium phosphate cement repair mortar and preparation method thereof
  • A kind of admixture for magnesium phosphate cement repair mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1 is an admixture for a magnesium phosphate cement repair mortar disclosed by the present invention and a preparation method thereof, the amount of the admixture is 25% of the total amount of the magnesium phosphate cement repair mortar, and the admixture includes the following components by weight :

[0039] components parts by weight Iron Vanadium 5 Silica fume 17.5 sodium pyrophosphate 7.5 Sodium lignosulfonate 2 citric acid 2 slag 30.05 fly ash 24.95 rice husk ash 3.5

[0040] A preparation method for an admixture for magnesium phosphate cement repair mortar, specifically comprising the following steps:

[0041] S1. Mixing of water resistant agent: first stir and mix iron vanadium, silica fume and sodium pyrophosphate evenly, the stirring speed is 25r / min, and the stirring temperature is 25°C;

[0042] S2. Auxiliary mixing: Then add slag, fly ash, rice husk ash, sodium lignosulfonate and cit...

Embodiment 2

[0043]Embodiment 2 is an admixture for a magnesium phosphate cement repair mortar disclosed by the present invention and a preparation method thereof, the amount of the admixture is 25% of the total amount of the magnesium phosphate cement repair mortar, and the admixture includes the following components by weight :

[0044]

[0045]

[0046] The preparation method of the admixture for repairing mortar with magnesium phosphate cement, the specific steps are the same as in Example 1.

Embodiment 3

[0047] Embodiment 3 is an admixture for a magnesium phosphate cement repair mortar disclosed by the present invention and a preparation method thereof, the amount of the admixture is 25% of the total amount of the magnesium phosphate cement repair mortar, and the admixture includes the following components by weight :

[0048] components parts by weight Iron Vanadium 5 Silica fume 17.5 sodium pyrophosphate 7.5 Sodium lignosulfonate 1 citric acid 1 slag 30.05 fly ash 24.95 rice husk ash 3

[0049] The preparation method of the admixture for repairing mortar with magnesium phosphate cement, the specific steps are the same as in Example 1.

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Abstract

The invention relates to an admixture for magnesium phosphate cement repair mortar and a preparation method thereof, the addition amount of the admixture is 5-35% of the total amount of the magnesium phosphate cement repair mortar, and the admixture includes the following components by weight : 25-35 parts of water-resistant agent, 1-3 parts of water-reducing agent, 1-3 parts of retarder, 3-4 parts of rice husk ash and 50-60 parts of admixture; the water-resistant agent includes iron vanadium and silica fume and sodium pyrophosphate. The preparation method specifically includes the following steps: S1. Stir and mix the iron vanadium, silica fume and sodium pyrophosphate evenly at a stirring speed of 20-30r / min and a stirring temperature of 20-25°C; S2. add the admixture, Rice husk ash, water reducer and retarder are mixed evenly, the stirring temperature is 25-30°C, and the stirring time is 1-3min to make an admixture. The invention has the effect of improving the water resistance of the magnesium phosphate cement repair mortar.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an admixture for magnesium phosphate cement repair mortar and a preparation method thereof. Background technique [0002] At present, the world's cement industry is mainly dominated by Portland cement, and the development and application of Portland cement is the most mature. Portland cement occupies a dominant position in large-scale engineering projects such as civil engineering and water conservancy. Yes, the production process is mature. In addition to the Portland cement system, there are aluminate cement and phosphate cement, among which magnesium phosphate cement is unique in the field of rapid repair due to its early strength and rapid hardening characteristics. [0003] Magnesium phosphate cement repair mortar is an air-hardening gel material, which can only be solidified and hardened in the air, and has good air stability in indoor dry air, and its flexural ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/18
CPCC04B40/0039C04B22/149C04B18/146C04B22/16C04B24/18C04B24/06C04B18/141C04B18/08C04B18/101
Inventor 张登平陈喜旺王军赵文丽周帅侯凯孔凡敏张弯陈庆刚王丽丽
Owner 北京建工新型建材有限责任公司
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