The concrete sleeper is typical railway sleeper, it is made from concrete. The cement, sand, stone, water and admixture are mixed into a mixture at a certain ratio, and put mixture into a combined model with steel wire or steel bars and sleeper fittings. Generally, concrete sleeper include vibration forming, steam curing, relaxing steel wire or steel bars and etc.
The concrete sleepers are a type of railway accessories. The sleeper not only supports the steel rail, but also maintains the position of the rail, and transmits the huge pressure transmitted by the steel rail to the track bed. It must have some flexibility and elasticity. When the train passes, concrete sleepers are properly deformed to cushion the pressure, and the train must be restored as much as possible after the train.
Of course, concrete sleepers also have disadvantages, especially weights that are much larger than wooden sleeper. Therefore, it is not suitable to use in unstable roadbeds and new roadbeds; in areas with frost heaving in winter, concrete sleeper is generally not allowed to be used; it is best not to use large quantities of concrete sleepers in the railway section for transportation of coal and ore, or heavily polluted roadbeds.