Concrete strength is measured by "bag mix", meaning that the bag mix answers the question, how many bags of cement per yard of concrete.
If you're looking for a "6 bag" mix, that means 6 bags of cement per yard of concrete. A "bag" of cement is 1 cubic foot. A yard of concrete is 27 cubic feet (3 X 3 X 3 = 27).
If you want to make a "6 bag mix" of concrete, using 1 bag of cement, you would make 1/6 yard concrete with 1 bag of cement. If you would be content with a "5 bag mix", you could make 1/5 yard.
Concrete is often defined as ratios of cement,sand,aggregate such as: 1:2:3 which is a very common mix.
For a 1:2:3 mix you would need 1/6th of the volume to be cement.
The dry ingredients are generally 1.6 x finished concrete volume.
Therefore dry volumen for 1 cubic yard = 1.6 cu yards = 43.2 cu ft.
1/6 x 43.2 = 7.2cu ft.
Therefore, if one bag is 1 cu ft we need 7.2 bags for a healthy 1:2:3 mix.
A '6 bag mix' or a '5 bag mix' are a bit short on cement.
Which Grade?
First, things are not made of cement- they are made of concrete- which consists of cement, sand, gravel and water. Mix them using 1 part cement, 1.5 parts sand, 3 parts gravel. To calculate how much CONCRETE you need, multiply depth X width X length in inches, then divide by 1728. This will tell you the number of cubic FEET of concrete. To get the number of cubic YARDS, divide the cubic feet by 27. If you are using packaged concrete mix (Sakrete is one) then an 80 lb bag makes 0.6 cubic feet of concrete. NOTE: If you are working with concrete for the first time- do not add too much water (weakens the concrete) and do not get wet concrete on bare skin- it will cause a chemical burn. Wash it off promptly if you do.
A lot
1 cubic yd of a concrete mixture contains about 500 hundred lbs of cement
8 bags
Normal concrete has a density around 2400 kg/cubic meter or 4048 lb/cubic yard. There are many different kinds of concrete, many of which are much lighter. Cement is the liquid (or paste like) form, and tends to be much heavier than when it has cured into concrete. "Cement" is not concrete, but can be used to make concrete by mixing with sand, stone and water. The density of cement is about 3120kg/m3.
The cement density is used in the calculation of the total aggregate content and of the concrete density.Normal concrete has a density around 2400 kg/cubic meter or 4048 lb/cubic yard. There are many different kinds of concrete, many of which are much lighter. Cement is the liquid (or paste like) form, and tends to be much heavier than when it has cured into concrete. "Cement" is not concrete, but can be used to make concrete by mixing with sand, stone and water. The density of cement is about 3120kg/m3.
300kg
8.22 bag's cement required
tell me the grade
That depends on what depth you want the concrete !
Making of Cement and Concrete are two separate and distinct processes! I would suggest, Manufacture of Portland Cement and Mix Designs for Concretes would be a much more appropriate category for this question!