"Zen83237" wrote in message
...
Very quick question. How many bags of sand will I need to lay 80 bricks
for the base of a greenhouse.

Thanks

Kevin

That all depends on how thick you make the joints!

Lets assume 1cm

Brick 200 x 100 x 75

Area of mortar on 1/2 single brick = 0.1 x 0.3 = 0.03m2
Volume of mortar per brick = 0.03 x 0.01 = 0.0003m3
80 bricks ; volume = 0.024m3
1m3 = 2,000 kg ; 0.024m3 = 48kg of mix

So 2 bags (25kg) sand at a minimum - plus cement;