Not a pro brick/block layer but when I worked mine out it was something like this.
1KG of mortar per block
1000 blocks = 1000KG of mortar
Divide the KG of mortar between parts, so if you're doing a 1:6 mix of 1 cement to 6 sand you would divide by 7.
1000KG / 7 = 142.86KG
That means for 1 part cement you'd need 142.68 KGs of cement (142.68 / 25KG bags = 5.7)
This means you'd need 6 x 142.86KG sand = 857.16 (a tonne bag).
No, you don't just use cement to lay blocks you need to make a mix called mortar.
Depending on the required strength it can be 1 part cement by volume to 3 parts sand by volume to 1 part cement to 9 parts sand.
If you are about to lay 3000 blocks and don't know this I would reconsider (as it sounds like you've never layed a block before). If you don't start off straight, plumb, correct gage and in the right place you'll never be able to correct it.
Then you should have known you don't lay blocks with cement..... 3 tonne of cement is enough for an estate.LOL, i know how how blocks a laid and what the mix is. Ive worked in construction my whole life(from 14-15 yr old, now in mid 40s) Its just i have never calculated how much cement needed per 1000.
Then you should have known you don't lay blocks with cement..... 3 tonne of cement is enough for an estate.
Honestly there is no harm in getting in a bricky and labouring for them. 3000 blocks will take them about 2 weeks to lay.
1.5 ton of cement for this
No, like tomfe said, you're interchanging mortar and cement; 1.5 ton of cement is way too much. Based on 3000 blocks you'll probably need about 15 - 20 bags but it will depend on the mix as tomfe said.
25 bags it is then, any left over will do for the plastering.
25 bags it is then
Depending on how fast you reckon these blocks will be laid i'd be tempted to under purchase. You can always buy more, no wastage and they won't go off.
15-18 more realistic if you're doing a 1:6 mix.
What mix are you doing? What blocks are you using? Your block manufacturer normally specifies best mix. A thermalite or celcon lightweight block is normally 1:6 mix, a concrete block is likely to be more cement, 1:4 or 1:5.
Depending on how fast you reckon these blocks will be laid i'd be tempted to under purchase. You can always buy more, no wastage and they won't go off.
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Have never used a 5:1 mix building, only in rendering
Wow really! What do you generally build?
I'm using a 5:1 mix for face brickwork now, and 6:1 on my lightweight blocks. I used a 3:1 for below ground on the engineering bricks.
Going to get 10ton building sand
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