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Expansion joint sealing material for waterproof layer of ballastless railway track subgrade surface

A sealing material, ballastless track technology, applied in the directions of non-polymer adhesive additives, adhesive additives, non-polymer organic compound adhesives, etc. It can solve the problems of low melting and durability and weak interface adhesion, so as to achieve good water immersion stability, maintain stable performance and good fluidity.

Inactive Publication Date: 2019-03-01
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane sealant is an organic material with low freeze-thaw resistance and durability. At the same time, the interface with the concrete waterproof layer (inorganic material) is not strongly bonded and is easily damaged, making the expansion joints of the waterproof layer the main source of surface water infiltration into the roadbed. Passage, resulting in roadbed diseases such as frost heaving and thawing, affecting the smoothness and driving safety of ballastless track

Method used

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  • Expansion joint sealing material for waterproof layer of ballastless railway track subgrade surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The waterproof layer expansion joint sealing material of the railway ballastless track subgrade surface of the present embodiment, the sealing material raw material comprises the following components by weight: 30 parts of epoxy resin, 10 parts of ethylene glycol butyl ether, 5 parts of n-butanol, 5 parts of methacrylic acid, 15 parts of toluene diisocyanate, 5 parts of polyether diol, 5 parts of polyether triol, 1 part of polyphenyl polyisocyanate, 5 parts of polydimethylsilane, 3,3'-di 4 parts of chloro-4,4'-diaminodiphenylmethane, 1 part of dibutyltin dilaurate, 1 part of tin maleate, 20 parts of modified filler, 1 part of tackifier;

[0012] The tackifier is a mixture of γ-glycidyl ether oxypropyl trimethoxysilane and N-β-(aminoethyl)-γ aminopropyl trimethoxysilane, by weight γ-glycidyl ether oxypropyl Trimethoxysilane: N-β-(aminoethyl)-γaminopropyltrimethoxysilane=2:1;

[0013] The modified filler is prepared in the following way: first prepare a mixed solvent of ...

Embodiment 2

[0015] The waterproof layer expansion joint sealing material of the railway ballastless track subgrade surface of the present embodiment, the sealing material raw material comprises the following components by weight: 40 parts of epoxy resin, 20 parts of ethylene glycol butyl ether, 12 parts of n-butanol, 10 parts of methacrylic acid, 25 parts of toluene diisocyanate, 10 parts of polyether diol, 10 parts of polyether triol, 5 parts of polyphenyl polyisocyanate, 10 parts of polydimethylsilane, 3,3'-bis 8 parts of chloro-4,4'-diaminodiphenylmethane, 3 parts of dibutyltin dilaurate, 3 parts of tin maleate, 30 parts of modified filler, 3 parts of tackifier;

[0016] The tackifier is a mixture of γ-glycidyl ether oxypropyl trimethoxysilane and N-β-(aminoethyl)-γ aminopropyl trimethoxysilane, by weight γ-glycidyl ether oxypropyl Trimethoxysilane: N-β-(aminoethyl)-γaminopropyltrimethoxysilane=2:1;

[0017] The modified filler is prepared in the following way: first prepare a mixed s...

Embodiment 3

[0019] The waterproof layer expansion joint sealing material of the railway ballastless track subgrade surface of the present embodiment, the sealing material raw material comprises the following components by weight: 30 parts of epoxy resin, 20 parts of ethylene glycol butyl ether, 5 parts of n-butanol, 10 parts of methacrylic acid, 15 parts of toluene diisocyanate, 10 parts of polyether diol, 5 parts of polyether triol, 5 parts of polyphenyl polyisocyanate, 5 parts of polydimethylsilane, 3,3'-di 8 parts of chloro-4,4'-diaminodiphenylmethane, 1 part of dibutyltin dilaurate, 3 parts of tin maleate, 20 parts of modified filler, 3 parts of tackifier;

[0020] The tackifier is a mixture of γ-glycidyl ether oxypropyl trimethoxysilane and N-β-(aminoethyl)-γ aminopropyl trimethoxysilane, by weight γ-glycidyl ether oxypropyl Trimethoxysilane: N-β-(aminoethyl)-γaminopropyltrimethoxysilane=2:1;

[0021] The modified filler is prepared in the following way: first prepare a mixed solven...

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Abstract

The invention discloses an expansion joint sealing material for a waterproof layer of a ballastless railway track subgrade surface. The expansion joint sealing material comprises raw materials as follows: epoxy resin, butyl cellosolve, n-butyl alcohol, methylacrylic acid, toluene diisocyanate, polyether diols, polyether triols, polyphenyl polyisocyanate, polydimethylsilane, 3,3'-dichloro-4,4'-diaminodiphenylmethane, dibutyltin dilaurate, tin maleate, modified packing and a tackifier. The expansion joint sealing material has good soaking stability, chemical stability, fatigue resistance and temperature stability, and can keep stable performance and good sealing effect in severe environments such as high temperature in summer, low temperature in winter, ozone and the like; the expansion joint sealing material has good adhesion and engagement effects with an expansion joint base material and has good displacement deformation resistance and anti-strip strength.

Description

technical field [0001] The invention relates to a road expansion joint material, in particular to a sealing material for an expansion joint sealing material of a waterproof layer of a railway ballastless track subgrade surface. Background technique [0002] The smoothness of ballastless track of high-speed railway seriously affects the ride comfort and safe operation of passengers. The subgrade is the foundation of the ballastless track, and the freezing problem of the subgrade of high-speed railways in cold regions such as Northeast China seriously affects the smoothness of the ballastless track. Therefore, in cold regions, preventing subgrade freezing and swelling is a key issue in the construction, operation and maintenance of high-speed railways. Among the various technical measures to prevent the subgrade from freezing, the design and construction of the waterproof layer of the subgrade surface is the key link, and the sealing of the expansion joints of the waterproof ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/04
CPCC09J4/06C09J11/04
Inventor 王羽唐志添严鑫刘丽
Owner CHONGQING JIAOTONG UNIVERSITY
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