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Magnesium phosphate cement based rapid repair mortar and preparation method thereof

A magnesium phosphate cement and repair mortar technology, which is applied in the field of magnesium phosphate cement-based rapid repair mortar and its preparation, can solve problems such as insufficient water resistance, achieve the effects of improving performance indicators, improving water resistance, and avoiding cracking of the repair surface

Active Publication Date: 2016-01-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent has adjustable coagulation speed and strong plasticity, but its water resistance is still insufficient.

Method used

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  • Magnesium phosphate cement based rapid repair mortar and preparation method thereof
  • Magnesium phosphate cement based rapid repair mortar and preparation method thereof
  • Magnesium phosphate cement based rapid repair mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A magnesium phosphate cement-based rapid repair mortar, comprising the following components in parts by weight:

[0041]

[0042] Magnesium phosphate cement is made by mixing 66.5 parts by weight of metal oxide powder, 24 parts of phosphate, 5 parts of retarder and 4.5 parts of setting adjustment components. The metal oxide powder is dead-burned magnesium oxide powder with a purity of more than 90%, fineness less than 200 mesh, phosphate is potassium dihydrogen phosphate, industrial grade product, purity greater than 98%, retarder borax, industrial grade product, purity greater than 98%, coagulation adjustment component is K 2 HPO 4, The fine aggregate is a mixture of river sand and quartz sand with a fineness modulus of 2 to 3 and a maximum particle size of 4.75mm.

[0043] The described rapid repair mortar is prepared through the following steps: weighing various raw materials according to the above-mentioned proportions, adding retarder borax, K 2 HPO 4 Dissolv...

Embodiment 2

[0045] A magnesium phosphate cement-based rapid repair mortar, comprising the following components in parts by weight:

[0046]

[0047] Magnesium phosphate cement is made by mixing 60 parts by weight of metal oxide powder, 28 parts of phosphate, 6 parts of retarder and 6 parts of setting adjustment components. The metal oxide powder is dead-burned magnesium oxide powder with a purity greater than 90%, fineness less than 200 mesh, phosphate is potassium dihydrogen phosphate, industrial grade product, purity greater than 98%, retarder borax, industrial grade product, purity greater than 98%, coagulation adjustment component is K 2 HPO 4 ·3H 2 O, the fine aggregate is machine-made sand with a fineness modulus of 2 to 3 and a maximum particle size of 4.75mm.

[0048] Weigh various raw materials according to the above proportions, mix evenly with reference to the preparation method of Example 1, and obtain a magnesium phosphate cement-based rapid repair mortar with excellent ...

Embodiment 3

[0050] A magnesium phosphate cement-based rapid repair mortar, comprising the following components in parts by weight:

[0051]

[0052] Magnesium phosphate cement is made by mixing 70 parts by weight of metal oxide powder, 20 parts of phosphate, 5 parts of retarder and 5 parts of setting adjustment components. The metal oxide powder is dead-burned magnesium oxide powder with a purity greater than 90%, fineness less than 200 mesh, phosphate is potassium dihydrogen phosphate, industrial grade product, purity greater than 98%, retarder borax, industrial grade product, purity greater than 98%, coagulation adjustment component is K 2 HPO 4 ·3H 2 O and K 2 HPO 4 It is mixed at a mass ratio of 1:1, and the fine aggregate is river sand with a fineness modulus of 2 to 3 and a maximum particle size of 4.75mm.

[0053] Weigh various raw materials according to the above proportions, and mix them evenly with reference to Example 1 to obtain a magnesium phosphate cement-based rapid ...

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Abstract

The invention relates to a magnesium phosphate cement based rapid repair mortar and a preparation method thereof. The rapid repair mortar includes the following components by weight: 100 parts of magnesium phosphate cement, 6-50 parts of a mineral admixture, 50-300 parts of fine aggregate, and 10-30 parts of water. The magnesium phosphate cement is obtained by mixing of, by weight, 60-70 parts of metal oxide powder, 20-28 parts of phosphate, 3-6 parts of a retarder and 4-6 parts of a coagulation regulating component. The magnesium phosphate cement based rapid repair mortar is prepared by adopting magnesium phosphate cement as the cementing material, adopting dipotassium phosphate for coagulation regulating modification, and using sand as the fine aggregate, then adding a proper amount of mineral admixture, and performing mixing with water. Compared with the prior art, the magnesium phosphate cement based rapid repair mortar provided by the invention has the advantages of controllable coagulation time, high bonding strength, good stability and high water resistance, etc.

Description

technical field [0001] The invention relates to a quick repair mortar and a preparation method thereof, in particular to a magnesium phosphate cement-based quick repair mortar and a preparation method thereof. Background technique [0002] With the development of my country's economy and the needs of society, most areas of my country are in the peak period of construction, and various infrastructures have been started and completed one after another, which has greatly promoted the rapid development of local social economy. However, due to sudden natural disasters such as low temperature, rain and snow, landslides, mudslides, etc., coupled with human factors such as overloading and improper operation, the concrete structures of many infrastructures have been severely damaged. If timely maintenance is not given, major economic and social losses. [0003] For an ideal repair material, it should have suitable setting time, good workability, rapid hardening and early strength, h...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B14/06C04B111/72
Inventor 蒋正武任强马敬畏
Owner TONGJI UNIV
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