A reinforced composite material sleeper for rail transit and its production process

Abstract

The invention discloses a reinforced composite material sleeper for rail transit. The sleeper comprises a sleeper body and high-density polyurethane foam filled in the sleeper body; the sleeper body is made of the following raw materials in parts by weight: unsaturated polyurethane 80-100 parts of ester resin, 1-2 parts of initiator, 1-2 parts of liquid release oil, 30-50 parts of filler, 1-2 parts of viscosity reducer, 1-3 parts of auxiliary agent, glass fiber, glass fiber mat 150-200 parts of mixture with glass fiber multi-axial cloth; the ratio of glass fiber, glass fiber felt and glass fiber multi-axial cloth in the mixture is 60:10:30. After the present invention is filled with high-density polyurethane foam, the modulus of elasticity of the overall sleeper is increased by about 20%, the bending strength is increased by 18%, the compressive recovery strength is increased by 20%, and the effect of shock absorption and noise reduction is slightly improved. And it effectively solves the problem that the overall performance of the sleeper is reduced by opening holes on the surface of the glass fiber composite sleeper. After the static load pressure test is performed on the composite sleeper introduced with high-density polyurethane foam, the overall compressive strength of the composite sleeper does not change much. At the same time, because polyurethane foam is a microporous material, its weight is relatively light.

Description

technical field [0001] The invention relates to a sleeper and its production process, in particular to a reinforced composite material sleeper for rail transit and its production process. Background technique [0002] With the rapid development of my country's national economy, intercity rail transit and high-speed railways are also developing rapidly. At present, the sleepers used for rail transit mainly include wooden sleepers and concrete sleepers. However, because the processing and manufacturing of wooden sleepers requires a large amount of wood and the product itself has disadvantages such as non-corrosion resistance and short service life, it deviates from the national low-carbon environmental protection requirements. Therefore, the use of concrete sleepers is gradually reduced; although the price of concrete sleepers is low and the production process is simple, due to the limitations of the product's own materials, its performance also has a large weight, inconvenien...

AI Technical Summary

Problems solved by technology

However, due to the complex manufacturing process and high product cost of the sleeper, it is difficult to promote and use it in a large area.

Images