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Building Materials

Q1:

The main constituent of fly-ash, is

A aluminium oxide

B silica

C ferrous oxide

D All of these.

ANS:D - All of these.

Component : Bituminous : Subbituminous : Lignite.

SiO2(%) : 20-60 : 40-60 : 15-45.

Al2O3(%) : 5-35 : 20-30 : 20-25.

Fe2O3(%) : 10-40 : 4-10 : 4-15.

CaO(%) : 1-12 : 5-30 : 15-40.

LOI(%) : 0-15 : 0-3 : 0-5.



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