High-speed railway ballast track ballast bed surface cementing material

A technology for high-speed railways and cementing materials, which is applied in the field of cementing materials on the surface of ballasted track beds of high-speed railways, can solve the problems of reduced material properties, low strength, foaming, etc., and achieves good corrosion resistance, UV aging resistance, and fatigue resistance. The effect of good performance and good service condition

Inactive Publication Date: 2017-05-10
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane ballast adhesives are more sensitive to the construction environment, such as foaming on the ballast surface or high air humidity, resulting in reduced material performance, etc.
Moreover, polyurethane ballast glue has high requirements on ballast cleanliness, but there are many impurities such as dust and stone powder on the surface of the ballast track bed in the operation line, and the bonding firmness between ballasts after spraying ballast glue cannot be guaranteed
At the same time, the early strength of the ballast glue is low, and the cementing effect is easily damaged by people stepping on it after spraying. Moreover, the ballast track bed road of the operating line is opened to traffic after the ballast glue is sprayed and the ballast glue is applied in the "skylight period". There is a risk of ballast splashing. risk
In addition, the ballast cemented by polyurethane ballast glue is difficult to maintain and clean, and cannot be maintained

Method used

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  • High-speed railway ballast track ballast bed surface cementing material
  • High-speed railway ballast track ballast bed surface cementing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composition of the cementing material on the surface of the ballast bed:

[0021] Part A is composed of the following raw materials in parts by weight: 100 parts of isocyanate composition, wherein 60 parts of MDI-50, 20 parts of PAPI, prepolymerization with NCO content of 15% prepared by MDI-100 and oleochemical polyether diol 10 parts of compound, 10 parts of prepolymer with NCO content of 20% prepared by IPDI and hydroxyl-terminated epoxidized polybutadiene, 5 parts of non-phthalate plasticizer, high solubility benzoate 5 parts of plasticizers, 2 parts of silane coupling agents containing isocyanate groups;

[0022] Part B consists of the following raw materials in parts by weight: 50 parts of high-activity polyether diol, 50 parts of high-activity polyether triol, 15 parts of ethylenediaminetetraether, 10 parts of MOCA, and 5 parts of triisopropanolamine grease , 5 parts of non-phthalate plasticizer, 5 parts of highly soluble benzoate plasticizer, 1 part of sili...

Embodiment 2

[0025] The composition of the cementing material on the surface of the ballast bed:

[0026] Part A is composed of the following raw materials in parts by weight: 100 parts of isocyanate composition, of which 30 parts of IPDI, 40 parts of carbodiamine modified MDI, NCO prepared from MDI-100 and tetrahydrofuran-propylene oxide copolyether diol 20 parts of a prepolymer with a content of 17.5%, 10 parts of a prepolymer with an NCO content of 16% prepared by IPDI and hydroxyl-terminated epoxidized polybutadiene, and 20 parts of a non-phthalate plasticizer , 10 parts of highly soluble benzoate plasticizers, 6 parts of silane coupling agents containing isocyanate groups;

[0027] Part B is composed of the following raw materials in parts by weight: 70 parts of high-activity polyether diol, 30 parts of high-activity polyether triol, 25 parts of ethylenediaminetetraether, 5 parts of MOCA, and 30 parts of triisopropanolamine grease , 20 parts of non-phthalate plasticizer, 10 parts of ...

Embodiment 3

[0030] The composition of the cementing material on the surface of the ballast bed:

[0031] Part A is composed of the following raw materials in parts by weight: 100 parts of isocyanate composition, wherein 50 parts of IPDI, 50 parts of a prepolymer with NCO content of 18% prepared by MDI-100 and hydroxyl-terminated epoxidized polybutadiene , 10 parts of non-phthalate plasticizers, 10 parts of highly soluble benzoate plasticizers, and 4 parts of silane coupling agents containing isocyanate groups;

[0032]Part B is composed of the following raw materials in parts by weight: 100 parts of high-activity polyether triol, 30 parts of ethylenediamine tetraether, 10 parts of MOCA, 5 parts of triisopropanolamine grease, non-phthalate ester 5 parts of plasticizer, 15 parts of highly soluble benzoate plasticizer, 1.5 parts of silicone defoamer, 2 parts of light stabilizer, 1 part of antioxidant, 0.5 part of hydrolysis stabilizer;

[0033] The volume ratio of A and B is 1:3.

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PUM

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Abstract

Provided is a high-speed railway ballast track ballast bed surface cementing material. The high-speed railway ballast track ballast bed surface cementing material is characterized in that a compound is composed of A and B; the A is prepared from, by mass, 100 parts of isocyanate and prepolymer thereof, 10-30 parts of an environment-friendly plasticizer and 2-6 parts of a bonding accelerator; the B is prepared from, by mass, 100 parts of polyether polyol, 30-60 parts of a chain extension cross-linking agent, 10-30 parts of an environment-friendly plasticizer, 1-3 parts of defoamer and 2-5 parts of an antiager; the volume ratio of the A to the B is 1:0.5-1:4. The ballast track ballast bed surface cementing material is proper in viscosity and curing speed, moderate in curing speed, bonding strength and flexibility, excellent in ageing resistance and low in sensitivity to air humidity, certain dirt resistance is achieved, the effect of inhibiting railway ballast splashing is obvious, and normal ballast track ballast bed tamping maintenance operation is not affected.

Description

technical field [0001] The invention relates to a cementing material on the surface of a ballasted track bed of a high-speed railway. Background technique [0002] The ballasted track bed can provide good track elasticity, slow down and absorb wheel-rail impact and vibration, and facilitate maintenance and repair. However, when the speed of the high-speed train exceeds 300km / h, the train wind speed formed on the surface of the ballast bed can reach more than 50m / s, and the light and flat ballast is prone to splash, which poses a hazard to the safety of train operation. In order to improve the safety of trains, ballast glue is often used to consolidate the ballast track bed to prevent ballast from splashing. Ballast structure cementing materials mainly include flexible ballast cementing materials and rigid ballast cementing materials. The flexible ballast cementing material is foamed polyurethane material, which can increase the integrity and stability of the ballast track ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/77C08G18/76C08G18/69C08G18/66C08G18/48C08K5/00C08K5/101
CPCC08G18/10C08G18/4812C08G18/4825C08G18/6685C08G18/69C08G18/7664C08G18/7671C08G18/778C08K5/0016C08K5/101
Inventor 易忠来靳昊李化建黄法礼谢永江
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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