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Rapid repair grouting mortar for high-speed rail ballastless track mortar layer

A technology of ballastless track and mortar layer, which is applied in the field of rapid repair grouting mortar for high-speed rail ballastless track mortar layer, which can solve the problem of poor corrosion resistance and freeze-thaw resistance of cement emulsified asphalt mortar, and no rapid repair of high-speed rail ballastless track mortar layer Materials, low bonding strength of quick-drying cement, etc., to achieve the effect of strong filling, civilized construction, and strong impact resistance

Inactive Publication Date: 2015-12-02
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two inorganic materials have some defects: quick-drying cement has low bonding strength and its own strength is not high. It is mainly used for repairing non-stressed concrete defects. Once it is used on stressed parts, it is easy to cause secondary damage.
The corrosion resistance and freeze-thaw resistance of cement-emulsified asphalt mortar are poor, and there will be secondary damage to varying degrees in 3-5 years after maintenance
The second type is organic polymer paste composed of epoxy resin, vinyl resin, and isobutylene resin. They have good mechanical properties and excellent bonding properties to concrete, but they also have some inherent defects, such as aging problems, Complex construction conditions and high cost
Through the literature search of the prior art, there is no related material for rapid repair of the mortar layer of the ballastless track of the high-speed railway.

Method used

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  • Rapid repair grouting mortar for high-speed rail ballastless track mortar layer
  • Rapid repair grouting mortar for high-speed rail ballastless track mortar layer
  • Rapid repair grouting mortar for high-speed rail ballastless track mortar layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment relates to the rapid repair grouting mortar and its preparation method for the mortar layer of the ballastless track of the high-speed railway:

[0028] Described each component and its weight percent are:

[0029]

[0030]

[0031] The above-mentioned components are prepared according to the above-mentioned process to prepare a fast repairing material, which is mixed with water according to the following ratio to prepare mortar. The repairing material: water is 1:0.08 (mass ratio), and the measured fluidity is 240mm, and the setting time is 10 minutes. Injection repair was performed on a damaged high-speed rail slag-free track mortar layer, and samples were made for testing at the same time. The repaired road section was opened to traffic 1 hour later, and after 1 month of observation, no damage occurred in the repaired mortar-free layer.

[0032] Implementation effect: the test results of the sample produced in this embodiment are as follows: i...

Embodiment 2

[0034] This embodiment relates to the rapid repair grouting mortar and its preparation method for the mortar layer of the ballastless track of the high-speed railway:

[0035] Described each component and its weight percent are:

[0036]

[0037] The above components are prepared according to the aforementioned process to prepare quick repair materials, and they are mixed with water according to the following ratio to prepare mortar. 15 minutes. Injection repair was performed on a damaged high-speed rail slag-free track mortar layer, and samples were made for testing at the same time. The repaired road section was opened to traffic 1 hour later, and after 1 month of observation, no damage occurred in the repaired mortar-free layer.

[0038] Implementation effect: the test results of the sample produced in this embodiment are as follows: it has been solidified in 15 minutes, the compressive strength after 1 hour is 30 MPa, and the compressive strength is 60 MPa after 28 da...

Embodiment 3

[0040] This embodiment relates to the rapid repair grouting mortar and its preparation method for the mortar layer of the ballastless track of the high-speed railway:

[0041] Described each component and its weight percent are:

[0042]

[0043] The above-mentioned components are prepared according to the above-mentioned process to prepare a fast repairing material, which is mixed with water according to the following ratio to prepare mortar. The repairing material: water is 1:0.10 (mass ratio), and the measured fluidity is 260mm, and the setting time is 20 minutes. Injection repair was performed on a damaged high-speed rail slag-free track mortar layer, and samples were made for testing at the same time. The repaired road section was opened to traffic 4 hours later, and after 3 months of observation, there was no damage to the repaired mortar-free layer.

[0044] Implementation effect: the test results of the sample produced in this embodiment are as follows: it has bee...

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Abstract

The invention provides grouting mortar used for restoring a high-speed rail ballastless track mortar layer. The grouting mortar used for restoring the high-speed rail ballastless track mortar layer comprises the following components in percentage by weight: 5.0-8.0% of potassium dihydrogen phosphate, 5.0-8.0% of ammonium dihydrogen phosphate, 16.0-32.0% of magnesium oxide, 32.35-55.5% of quartz sand, 10.0-25.0% of coal ash, 0.5-1.0% of borax, 0.5-1.0% of sodium tripolyphosphate, 0.05-0.5% of sodium fluorosilicate, 0.25-0.75% of polymer powder, 0.01-0.02% of defoaming agent and 0.08-0.09% of water reducer. The grouting mortar used for restoring the high-speed rail ballastless track mortar layer can be quickly set and hardened, strength is more than 30MPa, and the requirements for quickly restoring a high-speed rail ballastless track and being open to traffic can be met; liquidity is high, construction is easy and fallibility is strong; bonding capacity between the high-speed rail ballastless track mortar layer and an old mortar layer is strong; physical properties are stable, minimum inflation in volume is caused during setting and hardening, and impact resistance is strong.

Description

technical field [0001] The invention relates to a quick-repair grouting material in the technical field of building materials engineering, in particular to a quick-repair grouting mortar for a mortar layer of a ballastless track of a high-speed railway. Background technique [0002] With the vigorous development of my country's high-speed railway, ballastless track has been widely used. Although the ballastless track has a series of advantages such as high smoothness and high stability, under the train load and environmental factors, the ballastless track will inevitably have some diseases, which seriously affect the safe operation of the high-speed rail. Through the follow-up investigation on the operation of the existing high-speed railway ballastless track, it is found that the mortar layer has become the most common and main damage mode. For the special structure of high-speed rail, due to the uninterrupted operation of trains, the repair materials have the following sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34C04B111/70
Inventor 陈兵胡华洁
Owner CHINA RAILWAYS CORPORATION
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