For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is
A. 80 : 13 : 7
B. 70 : 20 : 10
C. 60 : 35 : 5
D. None of these
Answer: Option A
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For fly ash building bricks, the commonly recommended mix is:
Fly ash: 70%
Sand (or stone dust): 20%
Lime: 10%
Mix ratio:
Fly ash : Sand : Lime= 70 : 20 : 10