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Potassium magnesium phosphate cement-based inorganic rapid repair material for ballasted tracks

A potassium magnesium phosphate cement, ballastless track technology, applied in the field of building materials, can solve the problems of poor high temperature resistance, poor acid and alkali resistance, high brittleness, etc., and achieve the effects of strong wear resistance, fast setting and hardening, and high early strength.

Inactive Publication Date: 2019-10-01
中铁十八局集团第五工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the shortcomings of the existing epoxy mortars such as high brittleness, poor acid and alkali resistance, poor high temperature resistance, and serious aging, the present invention provides an inorganic phosphate rapid repair material using potassium magnesium phosphate cement as the gelling agent and its preparation method

Method used

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  • Potassium magnesium phosphate cement-based inorganic rapid repair material for ballasted tracks
  • Potassium magnesium phosphate cement-based inorganic rapid repair material for ballasted tracks
  • Potassium magnesium phosphate cement-based inorganic rapid repair material for ballasted tracks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A potassium magnesium phosphate cement-based rapid repair material, which is mixed with potassium magnesium phosphate cement-based gelling agent powder, filling aggregate (quartz sand), polypropylene fiber and water:

[0032] Potassium magnesium phosphate cement-based adhesive powder is calculated by mass percentage: 63% of overburned magnesium oxide, 19% of potassium dihydrogen phosphate, 9.3% of composite retarder, 8.4% of silica fume powder, and 0.3% of wood sulfur salt; The retarder is composed of borax, disodium hydrogen phosphate dodecahydrate, inorganic chloride salt and polyphosphate, and the mass percentage of each component is 22:46:32; among them, the inorganic chloride salt and polyphosphoric acid in the composite retarder The mass ratio of salt is 2:3, magnesium chloride is selected as inorganic chlorine salt, and sodium polyphosphate is selected as polyphosphate.

[0033] The mass fraction of the overburned magnesium oxide powder is 95%, and the specific s...

Embodiment 2

[0045] A potassium magnesium phosphate cement-based rapid repair material, which is mixed with potassium magnesium phosphate cement-based gelling agent powder, filling aggregate (quartz sand), polypropylene fiber and water:

[0046] Wherein, the composition and content of potassium magnesium phosphate cement-based adhesive powder are the same as in Example 1. The difference is that the dry material of potassium magnesium phosphate cement repair material is calculated by mass fraction: 58% of potassium magnesium phosphate cement-based gelling agent powder, 41% of quartz sand, and 1.0% of PVC fiber. The mass ratio of inorganic chloride salt and polyphosphate in the composite retarder is 1:1, potassium chloride is selected for inorganic chloride salt, and sodium polyphosphate is selected for polyphosphate.

[0047] The preparation method and application method of the potassium magnesium phosphate cement-based repair slurry in Example 2 are the same as in Example 1.

[0048] Acco...

Embodiment 3

[0053] A potassium magnesium phosphate cement-based rapid repair material, which is mixed with potassium magnesium phosphate cement-based gelling agent powder, filling aggregate (quartz sand), polypropylene fiber and water:

[0054] Potassium magnesium phosphate cement-based adhesive powder is calculated by mass fraction: 62% of overburned magnesium oxide, 23% of potassium dihydrogen phosphate, 7.9% of composite retarder, 6.8% of silica fume powder, and 0.3% of lignosulfur salt;

[0055] The mass ratio of inorganic chloride salt and polyphosphate in the composite retarder is 1:1, magnesium chloride is selected for inorganic chloride salt, and sodium polyphosphate is selected for polyphosphate.

[0056] The dry material of potassium magnesium phosphate cement repair material is calculated by mass fraction: 60% of potassium magnesium phosphate cement-based gelling agent powder, 39% of quartz sand, and 1.0% of PVC fiber.

[0057] The preparation method and application method of t...

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Abstract

The invention discloses a potassium magnesium phosphate cement-based inorganic rapid repair material for ballasted tracks. The inorganic rapid repair material is prepared from the following componentsby mass percent: 58-64% of potassium magnesium phosphate cement-based gelatinizing agent powder, 35-41% of quartz sand and 0.8-1.0% of polypropylene fibers; the potassium magnesium phosphate cement-based gelatinizing agent powder is prepared from the following components by mass percent: 88-92% of the potassium magnesium phosphate cement, 7.7-11.7% of silica fume and 0.2-0.3% of lignosulfonate; the potassium magnesium phosphate cement is prepared from the following components by mass percent: 70-75% of overburnt magnesium oxide powder, 17-22% of potassium dihydrogen phosphate and 7-12% of a compound retarder; the compound retarder is prepared from borax, disodium hydrogen phosphate dodecahydrate, an inorganic chlorine salt and polyphosphate. The prepared potassium magnesium phosphate cement-based inorganic rapid repair material has the characteristics of being rapid in setting and hardening speed, high in early strength, strong in volume stability, high in abrasive resistance, good incohesiveness, and the like, can be firmly bonded with old concrete and is higher in compatibility with the old concrete; the inorganic rapid repair material provided by the invention is simple in preparation process, convenient to use, energy-saving and environmentally-friendly.

Description

technical field [0001] The invention relates to a building material, in particular to an inorganic rapid repair material for a ballastless track based on potassium magnesium phosphate cement and a preparation method thereof. Background technique [0002] Ballastless track is widely used in the High-speed railway track engineering. At present, the high-speed railways built in my country all adopt the self-developed CRTSⅢ ballastless track. The track structure is a member of the prefabricated reinforced concrete track slab supporting the rail. Self-compacting concrete is filled between the track slab and the concrete base foundation. The material formed during the construction process There are many types, and the operating environment is relatively complex, accompanied by the multi-field coupling of dynamic loads and surrounding environmental loads, so the mechanism of damage failure and the evolution mechanism of dynamic performance are relatively complex, and the basic theo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B111/72
CPCC04B28/344C04B2111/72C04B2201/50C04B22/066C04B2103/22C04B14/06C04B16/0633C04B18/146C04B24/18
Inventor 张洁曹建腾石景林赵岩张炎林李林邱伟伟何光范中坡侯贺利杨连江高小建田金璐雷永章黄有鑫
Owner 中铁十八局集团第五工程有限公司
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