Novel cross-linked polyurethane ballast adhesive for rail transportation

Abstract

The invention provides a novel cross-linked polyurethane ballast adhesive for rail transportation, which is characterized in that the ballast adhesive is essentially prepared by mixing a component A and a component B in a weight ratio of (1:0.1)-(1:10) at minus 10 DEG C-100 DEG C, wherein the component A is diisocyanate or a monomer, polymer and derivative of polyisocyanate, or the component A isa prepolymer or semi-prepolymer prepared by reacting a hydroxyl-terminated compound or an amino-terminated compound with isocyanate; and the component B is a mixture of a chain extender and a weather-resistant protective material in a weight ratio of (0.1:1)-(1:5). In the invention, the ballast adhesive using a polyurethane elastic material with good high-low-temperature resistance as the main raw material is substituted for the traditional ballast adhesive in which an epoxy material is used as the main material in foreign countries; and by using the ballast adhesive provided by the invention, the traverse and longitudinal resistances and the ballast bed rigidity of ballast rails (such as linear and curved rails of which ballast shoulders can fall off easily and the like) are improved, and a certain vibration attenuation function is provided for the rail.

Description

technical field [0001] The invention relates to a novel rail transit polycrosslinked urethane ballast glue and a preparation method thereof, as well as the field and method of use of the ballast glue. Background technique [0002] Rail transportation takes railway as the main form, including ordinary low-speed railway and high-speed railway, and is the main component of my country's land transportation. In cities, rail transit also appears in the form of subways, urban railways, and light rails. Rail transit is the main artery of my country's national economy. It is estimated that in 2010, the passenger volume and cargo volume will reach 1.5 billion person-times and 3.5 billion tons respectively, and the turnover volume of passengers and goods will reach 800 billion passenger-km and 2.7 trillion ton-km respectively. my country's "Eleventh Five-Year Plan" plans to build 17,000 kilometers of new lines, including 7,000 kilometers of dedicated passenger lines; build 8,000 kilo...

AI Technical Summary

Problems solved by technology

Often due to design requirements, two kinds of tracks will exist at the same time in the track structure. If the two kinds of track forms exist at the same time, there will be a design for the transition section. In the transition section, there is a joint between the ballast track and the ballastless track, and the track rigidity has a sudden change. , that is, the rigidity of the ballastless track is relatively high, while that of the ballasted track is relatively low. If there is a direct transition, the train will have a greater impact on the rail when passing through this abruptly rigid section, which will affect the service life of the rail and potentially cause traffic safety problems. Hidden danger

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