Hi friends in this article let us discuss one of the basic yet interesting facts. I managed to gather information from various sources which includes internet and also books and I wish to share the information with you.I guess everyone would have traveled in a train at least once and if not at least we would have witnessed gravel being used in between the railway tracks. So let us discuss the reason why we use gravels inbetween the railway tracks.Here you go....
i) The name which we give for these gravels used in the railway track is "BALLAST"
ii) Now imagine we use soil instead of gravels, and if it rains these soils would absorb moisture and maintain this moisture for sometime and as a result the ground may become weak and it may not withstand the strong vibration that is produced when the trains move on these railway tracks.
iii) On the other hand the use of gravel, will enable the water, due to rain, to drain from the track.
iv) Apart from this the use of gravel will also dissipate the vibration produced by the trains and also makes sure that these vibrations doesn't travel a long distance and make cracks in the neighboring buildings.In other words we can say that it acts as a cushion for the trains.
v) It assists in helping control the thermal expansion of continues welded rail.