Q: How many bags of mortar per ton of sand?

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21

That depends on the size of your bags! My bags are 25 kg (20 l) 5 inches is 120 mm I would use 2 bags of cement and 4 bags of sand and 6 bags of gravel (well I do not buy my gravel in bags but the equivalent volume). I would mix with as little water as necessary to get a pourable consistency.

are these concrete blocks and allowing for mortar. 12.5 per square metre, 62.5 per cubic metre with mortar

11 bags

1.09 cu yards is 29.43 cubic feet and sands weighs 100 pounds per cu ft so you need 2943 pounds. Dide by 50 pounds per bag that is 59 bags

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7 bags per 1000 on mortar mix and half a truckload of "mortar" sand aught to do it.

65 BLOCKS PER 74 POUND OF MORTAR (THAT YOU ADD SAND TO) 80 POUND PREMIX MORTAR JUST ADD WATER 27 BLOCK 8X8X16

it is 100 bags of sand/ballast

21

I'll use the density of dry, packed sand, which is 100 lbs per cubic foot, 50/100 is 2 50 lb bags of sand

That depends on the size of your bags! My bags are 25 kg (20 l) 5 inches is 120 mm I would use 2 bags of cement and 4 bags of sand and 6 bags of gravel (well I do not buy my gravel in bags but the equivalent volume). I would mix with as little water as necessary to get a pourable consistency.

The volume of sand weighs 455x 2/12 *100 pounds per cubic foot = 7600 pounds so you need about 152 bags.

are these concrete blocks and allowing for mortar. 12.5 per square metre, 62.5 per cubic metre with mortar

If a 20kg bag of cement=0.1m3 with 100 lots o 0.01 to 1m3 then you will need 12.5 bags per m3. So you need approx 11.5m3 of sand and 144 bags of cement (144 x 0.01 = 1.44m3) to give you a total of 12.94m3

11 bags

About two bags per square foot.

not a lot. but assuming 9"x3" and using this brick calculator it works out at 0.0003 cubic meters of mortar or 0.91kg of sand and 0.25kg of cement per brick.