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Ballastless track CA (cement and asphalt) mortar layer damage repair resin material and preparation method thereof

A ballastless track and resin material technology is applied in the field of engineering materials for high-speed railway tracks, which can solve the problems of unfavorable repair of CA mortar layer damage, affecting the penetration process of pulp material, and large shrinkage rate of cured products, achieving fast curing, High bond strength, good fluidity and permeability

Inactive Publication Date: 2017-01-25
北京中德新亚建筑技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Epoxy-furfural-acetone system is a commonly used chemical grouting material in the repair process of ballastless track damage in high-speed railways. This system has excellent properties such as good permeability, high adhesion, and strong corrosion resistance. It is widely used in the engineering field, but there are 20-40% moderately toxic furfural (volatile and irritating) in the system, which causes great harm to the environment
Some systems also contain a certain amount of inactive diluent (such as xylene, n-butanol, etc.), which makes the cured product have a large shrinkage rate, which is not conducive to the repair of damage to the CA mortar layer
The general epoxy grout has the characteristics of high heat release in the early stage during its curing process. Once the heat is released, the curing speed will be accelerated, which will inevitably affect the penetration process of the grout material in the grouted material.

Method used

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  • Ballastless track CA (cement and asphalt) mortar layer damage repair resin material and preparation method thereof
  • Ballastless track CA (cement and asphalt) mortar layer damage repair resin material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 A resin material for repairing damage to the CA mortar layer of a ballastless track, which is made of the following raw material ratios: 100 kg of epoxy resin, 30 kg of furfural, 20 kg of acetone, 0.2 kg of saturated ammonia water, 6 kg of toughening agent, accelerator Agent 2kg, coupling agent 1.2kg, surfactant 1kg, compound amine curing agent 40kg, the viscosity of the epoxy resin is 28mPa·s, the accelerator is DMP-30, and the coupling agent is KH- 550, the toughening agent is polysulfide rubber, the surfactant is oleic acid, and the complex amine curing agent is SK-302.

[0022] A method for preparing a resin material for repairing damage to a ballastless track CA mortar layer, the preparation method comprising the following steps:

[0023] A, take furfural, acetone, saturated ammonia water, put furfural and acetone in the reaction kettle, add saturated ammonia water, stir for 10min, generate furfurylidene acetone resin;

[0024] B, take the epoxy resin, a...

Embodiment 2

[0029] Example 2 A resin material for repairing damage to the CA mortar layer of a ballastless track, which is made of the following raw material ratios: 100 kg of epoxy resin, 35 kg of furfural, 23 kg of acetone, 0.25 kg of saturated ammonia, 8 kg of toughening agent, and 1.5kg of epoxy resin, 1.2kg of coupling agent, 1kg of surfactant, 35kg of compound amine curing agent, the viscosity of the epoxy resin is 20mPa·s, the accelerator is DMP-30, and the coupling agent is KH -550, the toughening agent is polysulfide rubber, the surfactant is oleic acid, and the complex amine curing agent is SK-302.

[0030] The preparation method is the same as in Example 1.

[0031] The resin material for repairing damage to the CA mortar layer of the ballastless track prepared in this example is injected into the cracks of the ballastless track, and the aging test results are shown in Attached Table 1.

Embodiment 3

[0032] Example 3 A resin material for repairing damage to the CA mortar layer of a ballastless track, which is made of the following raw material ratios: 100 kg of epoxy resin, 30 kg of furfural, 20 kg of acetone, 0.2 kg of saturated ammonia water, 4 kg of toughening agent, accelerator Agent 1.5kg, coupling agent 1.2kg, surfactant 1.3kg, complex amine curing agent 45kg, the viscosity of the epoxy resin is 27mPa·s, the accelerator is DMP-30, and the coupling agent is KH-550, the toughening agent is polysulfide rubber, the surfactant is oleic acid, and the complex amine curing agent is SK-302.

[0033] The preparation method is the same as in Example 1.

[0034] The resin material for repairing damage to the CA mortar layer of the ballastless track prepared in this example is injected into the cracks of the ballastless track, and the aging test results are shown in Attached Table 1.

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Abstract

The invention relates to a ballastless track CA (cement and asphalt) mortar layer damage repair resin material and a preparation method thereof, belonging to the field of high-speed railway engineering materials. The resin material is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 30-60 parts of furfural, 20-40 parts of acetone, 0.1-0.3 part of saturated ammonia water, 3-10 parts of toughener, 1-3 parts of accelerator, 0.5-2 parts of coupling agent, 0.5-2 parts of surfactant and 20-50 parts of composite amine curing agent. The obtained product has the characteristics of high binding force and high corrosion resistance in the common epoxy-furfural-acetone resin grouting material, also has the advantages of high permeability, environment friendliness, low toxicity, higher glass transition temperature, low shrinkage, high normal-temperature curing rate and the like, and is applicable to wet basal plane construction.

Description

technical field [0001] The invention relates to the field of engineering materials for high-speed railway tracks, in particular to a resin material for repairing damage to a CA mortar layer of a high-permeability ballastless track. Background technique [0002] Epoxy-furfural-acetone system is a commonly used chemical grouting material in the repair process of ballastless track damage in high-speed railways. This system has excellent properties such as good permeability, high adhesion, and strong corrosion resistance. It is widely used in the engineering field, but the system contains 20-40% of moderately toxic furfural (volatile and irritating), which causes great harm to the environment. Some systems also contain certain inactive diluents (such as xylene, n-butanol, etc.), which make the cured product have a large shrinkage rate, which is not conducive to the repair of damage to the CA mortar layer. The general epoxy grout has the characteristics of high heat release in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L81/04C08L61/02C08K5/17C08G6/02
CPCC08G6/02C08L63/00C08L2205/03C08L2207/02C08L81/04C08L61/02C08K5/17
Inventor 王学振
Owner 北京中德新亚建筑技术有限公司
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