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Fly Ash

  • IASbaba
  • July 6, 2021
  • 0
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Fly Ash

Part of: GS Prelims and GS-II – Policies and interventions and GS III – Conservation

In news 

What is Fly Ash?

  • Fly Ash is a byproduct from burning of coal in the thermal power generation.
  • It is called fly ash because it is transported from the combustion chamber by exhaust gases.
  • Composition: silicon dioxide (SiO2), aluminium oxide (Al2O3), ferric oxide (Fe2O3) and calcium oxide (CaO).
  • Uses: In concrete and cement products, road base, metal recovery, and mineral filler among others.
  • Harmful Effects:
    • Toxic air pollutants which can trigger heart disease, cancer, respiratory diseases and stroke.
    • When combined with water they cause leaching of heavy metals in ground water.
    • Affects the root development system of trees.

What is Fly Ash Utilisation Policy?

  • To promote the use of Fly Ash bricks in building construction, NTPC has set up Fly Ash brick manufacturing Plants at its Coal based Thermal Power Plants.
  • Pradhan Mantri Awas Yojana (Urban) has focused on new construction technologies such as using fly ash bricks that are innovative, and environmentally friendly.
  • Maharashtra was the first state to adopt the Fly Ash utilization policy.
  • A web portal for monitoring of fly ash generation and utilization and a mobile based application titled “ASHTRACK” has been launched by the Government.
  • GST rates on fly ash and its products have been reduced to 5%.

Pic courtesy: Researchgate

Source: PIB

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