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Spray polyurethane foam material for track board and construction method thereof

A technology of spraying polyurethane and foam materials, which is applied to tracks, roads, buildings, etc., to achieve the effect of easy operation, simple construction method and good durability

Inactive Publication Date: 2015-04-29
BEIJING ACAD OF BUILDING ENG
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The track slab cracks caused by temperature have not been effectively resolved. At present, post-repair technology is mostly used. The repair material often uses high-permeability organic resin. This repair material can effectively delay the corrosion of steel bars and carbonization of concrete caused by cracks, but it cannot fundamentally solve the problem

Method used

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  • Spray polyurethane foam material for track board and construction method thereof
  • Spray polyurethane foam material for track board and construction method thereof
  • Spray polyurethane foam material for track board and construction method thereof

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Embodiment Construction

[0026] In conjunction with specific examples, the present invention will be further described.

[0027] The invention relates to a sprayed polyurethane foam material, in particular to a sprayed polyurethane foam thermal insulation material for a high-speed railway track plate; the invention also relates to a construction method of the material.

[0028] A spray polyurethane foam material for track board, its A component consists of 20% polyether polyol, 39% polyester polyol, 2% foam stabilizer, 10% blowing agent, 3.8% catalyst, 15% flame retardant , 1.5% antioxidant, 15% modified titanium dioxide - glass fiber powder mixture; B component is composed of isocyanate mixture.

[0029] The modification method of the modified titanium dioxide-glass fiber powder is to mix titanium dioxide: glass fiber powder: modifying agent = 1: 0.3: 0.4, and disperse it in deionized water of equal mass, at a speed of 600r / min, heat up Stir at high speed for 40 minutes at 90°C, take out and filter ...

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Abstract

The invention relates to a spray polyurethane foam material for a track board and a construction method thereof, wherein a spray polyurethane component A consists of polyether polyol, polyester polyol, a foam stabilizer, a foaming agent, a catalyst, a flame retardant, an antioxidant and a modified titanium dioxide-glass fiber powder mixture; and a component B consists of an isocyanate mixture. The construction method comprises the following steps: pre-sealing a rail fastener (a); smearing a primer (c) on the track board (b); then spraying a 5-10mm polyurethane foam material (d); and finally smearing an aliphatic polyurethane coating (e) to accomplish construction. The spray polyurethane foam material provided by the invention is mainly applied to the track board of a high speed railway to fundamentally solve the temperature cracking problem of a concrete member. The material provided by the invention has a thermal insulation effect and excellent mechanical property, and the bonding strength with the track board can reach over 0.3MPa.

Description

technical field [0001] The invention relates to a sprayed polyurethane foam material, in particular to a sprayed polyurethane foam thermal insulation material for a high-speed railway track plate; the invention also relates to a construction method of the material. Background technique [0002] The ballastless track is a track structure in which a rigid concrete bed replaces a loose-grained gravel track bed. It has good stability, smoothness and durability, and the track bed is clean and beautiful. It has been widely used in high-speed passenger dedicated lines. But at the same time, the cracking of the ballastless track track slab is also a common technical problem in the construction and operation of high-speed railways. Once the cracks are formed, they will cause great harm. It will reduce the durability of the ballastless track and reduce the The insulation performance of the track weakens the bearing capacity of the track, and may also adversely affect the safety of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42C08G18/76C08G18/75C08K13/06C08K9/06C08K3/22C08K7/14C08J9/04E01B19/00C08G101/00
CPCC08G18/7664C08G18/4018C08G18/758C08K3/22C08K7/14C08K9/06C08K13/06C08K2003/2237E01B19/00
Inventor 朱宁王万金贺奎夏义兵董全霄吴敬朋樊勇
Owner BEIJING ACAD OF BUILDING ENG
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