"Dream, Dream, Dream! Conduct these dreams into thoughts, and then transform them into action."
- Dr. A. P. J. Abdul Kalam
"Dream, Dream, Dream! Conduct these dreams into thoughts, and then transform them into action."
- Dr. A. P. J. Abdul Kalam
1 May 2023
For many, a train journey is a relaxing and enjoyable travel experience. However, as the train glides along the tracks, one might have wondered why there are stones strewn across them. These crushed stones are called track ballast and are essential to keep the railway tracks in place.
Railway sleepers used to be made of wood, but nowadays, they are primarily made of pre-stressed concrete.The type of stone used for track ballast is equally important. Smooth and round pebbles, like those found in river beds, are not suitable as they might roll or slide against one another when a train passes on the tracks.
To ensure that the railway tracks remain stable, sharp-edged stones are used as track ballast. The stones perform various functions besides keeping the tracks in place, including preventing vegetation growth and facilitating proper drainage beneath or around the tracks to prevent water accumulation.
Passing trains can generate immense vibrations and noise, which could be a problem for nearby buildings. To minimize vibrations, railways use a clamping technique consisting of Ethylene Propylene Diene Monomer rubber, which is highly resistant to heat, water, and mechanical strains.
So, the next time you take a train journey, take a moment to appreciate the humble stones that keep the tracks in place.
