10 80# bags will fill about 6 cubic feet, so 375 bags should fill 225 cubic feet (30 x 30 x 0.25).
ANS 2 -
At least in my area, it would be much cheaper ordering this to be delivered by a concrete truck.
An 80 lb. bag of concrete is 2/3 of a cubic ft. of concrete. 3 bags is 2 cu. ft. So for 225 cu.ft. youll need 338 bags of concrete.
15 cubic yards
go to any search. and type in concrete calculater
If your talking about 4'x4'x4" thick it will take about 12 bags. Most 60# bags will do .45 cubic feet and that slab would be about 5.3 cubic feet wich equals 11.77 bags.. Mike
about 60 60lb bags
27 bags of 30kg bags of concrete bargs
15 cubic yards
18 bags (80 pounds) of quikrete for a 4 inch thick slab.
go to any search. and type in concrete calculater
If your talking about 4'x4'x4" thick it will take about 12 bags. Most 60# bags will do .45 cubic feet and that slab would be about 5.3 cubic feet wich equals 11.77 bags.. Mike
about 60 60lb bags
27 bags of 30kg bags of concrete bargs
4.4 bags
The answer will depend on how large and area you want the topping for. Without that information, no sensible answer is possible.
how many bags of cement for a pad 4x7x4 inches thick
1 60lbs bag makes around a 1' by 1' by 3" thick pad..
What size bags of concrete and how big are the bricks? Makes a difference.
Figure about 1/2 cubic foot per 60 lb bag. The basic formula is to use equal amounts of cement, sand, and gravel. There are 27 cubic yards per cubic foot. It depends upon how thick you are planning to pour the concrete. For one foot thick, you would need 9 cubic feet of concrete. For 6" thick, you would need 4 1/2 cubic feet. I'll give you the answers for 1 ft thick and for 6" thick. For 1 foot thick, you need 9 cubic feet at 1/2 cubic foot per 60 lb bag equals 18-60 lb bags. That's six 60 lb bags of concrete, plus six 60 lb bags of sand, plus 360 lbs of gravel. For 6 inches thick, divide each of these by 2 to give 3-60 lb bags of concrete, 3-60 lb bags of sand, plus 180 lbs of gravel.