Question
Download Solution PDFThe ballast material generally used in Indian railways consists of
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
The following materials for Ballast can be used on the railway track.
1. Broken Stone
2. Gravel
3. Cinders / Ashes
4. Sand
5. Kankars
6. Moorum
7. Brick Ballast
Among above materials, broken stone from Igneous rocks like quartzite and granite forms the excellent ballast materials. When these are not available then lime stone and sand stone can also be used as good ballast material.
Some of the main functions of ballast are followings:
a) To provide firm and level bedded foundation for the sleepers and rails to rest on
b) To protect the surface of subgrade and to form an elastic bed
c) To transmit and distribute the loads from the sleepers to the subgrade
d) To allow for maintaining correct track level without disturbing the rail road bed
e) To hold the sleepers in position during the passage of trains
f) To provide lateral stability to the track as a whole.
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