Q. Which of the following is/are advantages of fly ash?
1.Fly ash bricks are light in weight and offer high strength and durability.
2.Fly ash is a better fill material for road embankments and in concrete roads.
3.Fly ash can be used in reclamation of wastelands.
How many of the statements given above are correct?
Answer: C
Notes:
Explanation: Fly ash is one such residue which rises with the gases into the atmosphere.
- Fly ash is a very fine powder and tends to travel far in the air. The ash which does not rise is termed as bottom ash.
- Cement can be replaced by fly ash up to 35%, thus reducing the cost of construction, making roads, etc.
- Fly ash bricks are light in weight and offer high strength and durability.
- Fly ash is a better fill material for road embankments and in concrete roads. Fly ash can be used in reclamation of wastelands.
Source: Shankar IAS
