Write two uses of each : (i) Fly ash (ii) Blast furnace slag

Write two uses of each : (i) Fly ash (ii) Blast furnace slag
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1 Answer

Answer :

I) Fly ash

The various uses of fly ash are:

1) Concrete production, as a partial substitute material for Portland cement.

2) For the construction of embankments and other structural fills.

3) For grouting and flow able fill production.

4) Waste stabilization and solidification.

5) For cement clinkers production.

6) For mine reclamation.

7) For stabilization of soft soils.

8) For the road sub base construction.

9) As fine aggregate substitute material.

10) For the manufacturing of bricks.

II) Blast furnace slagBlast furnace slag can be used for –

1) As a supplementary cementitious material either by premixing the slag with

Portland cement or hydrated lime to produce blended cement or by adding the slag to Portland cement concrete as mineral admixture.

2) Air cooled blast furnace slag is used as aggregate material

3) It is used as a concrete aggregate in construction of bridges.

4) It is used as an aggregate with asphalt for construction of damp proof course and water proofing.

5) It is used as insulation in mineral wool, in rail road ballast etc. 
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