How we can calculate the quantity of sand, & cement, & also
aggregate for a slab.

Length 25'/3.28 = 7.62 Mtr
width 20'/3.28 = 6.09 Mtr
depth 6" /3.28 = 0.152 Mtr

Answer Posted / selvam.m

First off thank to all ans poster.

Qty Of the Slab is = 7.62X6.09x0.152
= 7.054 Cum
Assume we providing the M20-Concrete on this slab.

Cement:
cement = 7.054*300 = 2116.1kg
or
Cement + Fly ash = 7.054*270 + 7.054*56 = 1904.5 kg cement,395kg fly ash.

Sand:
Sand = 7.054*120*6 = 5078.88 kg.

Aggregate:
20mm= 7.054*126*6 = 5332.824 kg.
12.5mm = 7.054*6 = 3216.624 kg.

Note:
M20-concrete

1Bag - Cement
120kg - sand
126kg - 20mm Agg
76kg - 12.5mm Agg
water - 25 ltr

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