Maharashtra State PSC Model Paper 1

The correct answer is 1, 2 and 3.

Fly Ash

• It is popularly known as pulverised fuel ash.
• It is a coal combustion product and includes substantial amount of Silica dioxide, Aluminium oxide and calcium oxide.
• It is major by product of thermal power plants.
• It also contain unburnt carbon and minor constituents includes- Arsenic, Beryllium, Boron, Cadmium, Chromium, Cobalt, Manganese, Mercury etc.

Applications of Fly Ash-

• Fly ash can replace aggregate in concrete mixtures.
• It can be used to construct embankments and other structural fills.
• Stabilization of soft soils.
• Used in road subbase construction.
• Used as aggregate substitute material
• Used in Concrete production to substitute Portland cement.
• Loose applications on rivers to melt ice.