Question

Please anyone explain me that how aluminium used in joining railway tracks?

Answer 1

Aluminium is used in joining of railway tracks by a reaction that is called THERMITE REACTION.

In this reaction, iron and aluminium are melted due to large discharge of heat during reaction, so the melted substance is used for the joining of railway tracks.

Answer 2

Here what u want.....

The reduction of a metal oxide to form metal by using aluminium powder as a reducing agent is called a thermite reaction. ... This reduction property of aluminium is used in thermite welding for joining the broken pieces of heavy iron objects like girders, railway tracks or cracked machine parts.

It is normally a mixture of iron oxide and aluminium metal. Due to the exothermic nature the reaction, iron is obtianed in molten form and can be used for welding of the railway tracks.

I hope this is useful