Uses of Fly ash

Q.  Which of the following are benefits of fly ash?

1) Construction material
2) Reclamation of low-lying areas
3) Filling old mines
- Published on 01 Sep 16

a. 1, 2
b. 1, 3
c. 2, 3
d. All of the above

ANSWER: All of the above
 
  • Fly ash includes substantial amounts of oxides of silica, aluminum and calcium.
  • Element like Arsenic, Boron, Chromium, lead etc. are also found in trace concentrations.
  • It, thus, poses hazards to environment and health.
  • However, at the same time due to the presence of these minerals fly ash has certain unique properties.
  • It can be used as a construction material, filling old mines, building railway embankments, and reclamation of low-lying areas.
  • New and innovative uses are also taking place- especially initiated by power companies like NTPC in collaboration with Institutes like IIT-Delhi and IIT-Kanpur e.g. Manufacture of pre-stressed railway concrete sleepers.
  • Recently Maharashtra government has decided to come up with an export policy for fly ash in the light of demand from places like Singapore and Dubai.

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