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Cured track bed sinking repairing high-viscosity vibration attenuation polyurethane repairing material

A repair material, polyurethane technology, applied in the direction of track, road, track maintenance, etc., can solve the problems of aggravated railway transportation and line maintenance, increased maintenance and repair workload, poor maintainability of ballastless track, etc., to achieve strong deformation ability , high dimensional stability, good damping effect

Active Publication Date: 2016-01-20
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ballasted track has the advantages of low cost, simple construction, good elasticity and maintainability. However, with the rapid development of my country's economy, high-speed railway and heavy-duty railway are the main directions of railway development in my country. The increase of axle load increases the workload of maintenance and repair of ballasted track, which further intensifies the contradiction between railway transportation and line maintenance and repair; ballastless track has the advantages of strong integrity, high stability and less maintenance workload, but The ballastless track requires a solid offline foundation, and the maintainability of the ballastless track is poor, and the project cost is relatively high

Method used

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  • Cured track bed sinking repairing high-viscosity vibration attenuation polyurethane repairing material
  • Cured track bed sinking repairing high-viscosity vibration attenuation polyurethane repairing material
  • Cured track bed sinking repairing high-viscosity vibration attenuation polyurethane repairing material

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0024] Specific embodiment 1 is as shown in table 1.

[0025] Concrete specimens were cored and cut to size φ For a sample of 50mm×25mm, place the two samples in the middle, the distance between the samples is 20mm, seal the surrounding of the sample with kraft paper and wide tape, leave a grouting hole in the upper part, and use an electric stirrer to mix A component and B component The components were mixed at high speed and poured into the cavity. After 1 day, the mold was demoulded, and the metal side head was pasted on the outside of the concrete sample. The electronic universal testing machine was used to test the bonding performance of the polyurethane repair material and the concrete material. The tensile rate was 10mm / min. In the anti-fatigue performance test, the maximum load is 0.3MPa, the minimum load is 0.03MPa, and the loading frequency is 5HZ. Use a vernier caliper to measure the thickness of the sample before and after loading, and calculate the accumulated r...

specific Embodiment 2

[0032] Specific embodiment 2 is as shown in table 3.

[0033] Table 3 specific embodiment 2

[0034]

[0035] Note: Mw in the table represents the average molecular weight of the compound.

[0036] Specific embodiment 2 test method is identical with the test method of embodiment 1, and implementation effect is shown in Table 4.

[0037] The performance of the polyurethane repair material that table 4 produces according to specific embodiment 2

[0038]

specific Embodiment 3

[0040] Specific embodiment 3 is as shown in table 5.

[0041] Table 5 specific embodiment 3

[0042]

[0043] Note: Mw in the table represents the average molecular weight of the compound.

[0044] Test method is identical with the test method of embodiment 1, and implementation effect is shown in Table 6.

[0045] Table 6 is according to the performance of the polyurethane repairing material that concrete embodiment 3 produces

[0046]

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Abstract

The invention relates to a high-viscosity vibration attenuation polyurethane repairing material for sinking repairing of a polyurethane cured track bed of a high speed railway or a heavy haul railway. The high-viscosity vibration attenuation polyurethane repairing material consists of a component A and a component B which are mixed and stirred together mechanically, wherein the mass ratio of the component A to the component B is (1:0.9)-(1:1.5); the component A is a mixture of an HDI tripolymer and polymethylene polyphenyl isocyanate ester; the mass ratio of the HDI tripolymer to polymethylene polyphenyl isocyanate ester is (3:7)-(6:4); the content of -NCO is 27-29%; and the component B consists of polyhydric alcohol, a catalyst, a defoaming agent, a moisture scavenger, an anti-aging agent, a flame retardant and rubber granules. The high-viscosity vibration attenuation polyurethane repairing material is characterized in that the polyhydric alcohol is a mixture which consists of 6-functionality-degree mannitol poly(propylene oxide polyol) and 3-functionality-degree high molecular weight polyether polyol with the molecular weight of 12000. According to the polyurethane repairing material provided by the invention, the volume expansion ratio is 1-3%, the compressive strength of 1 hour is greater than or equal to 12MPa, the adhesion strength is greater than or equal to 6MPa, the damping factor is 0.25-0.40, the accumulated residual deformation is less than or equal to 0.5% after 5 million times of fatigue loading, and the polyurethane repairing material can be applied to polyurethane cured track bed sinking repairing and railway ballast cured track bed sinking repairing as well.

Description

technical field [0001] The invention relates to a high-bonding and vibration-reducing polyurethane repairing material for settlement repair of polyurethane solidified ballast bed of high-speed railway or heavy-duty railway, which can be used for repairing aging damage of solidified ballast bed structure, and is also suitable for ballasted-ballastless high-speed railway The invention relates to the damage and settlement repair of the ballast glue solidified ballast bed in the track transition area, and belongs to the technical field of microcellular foamed polyurethane elastomers. Background technique [0002] Ballasted track has the advantages of low cost, simple construction, good elasticity and maintainability. However, with the rapid development of my country's economy, high-speed railway and heavy-duty railway are the main directions of railway development in my country. The increase of axle load increases the workload of maintenance and repair of ballasted track, which f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L7/00C08G18/79C08G18/76C08G18/48C08G18/22C08K13/02C08K5/524C08K5/521E01B37/00
Inventor 谢永江李书明郑新国曾志刘竞翁智财王月华张雯杨德军刘相会
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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