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How do you mix 1 cubic meter of concrete?
A typical mixture of concrete will be 10 to 15% cement, 60 to 75% aggregate, and 15 to 20% water.
What material ratio is in one cubic foot of concrete?
There are different concrete mixes and the will depend on which mix it is. The material ratio will remain the same whatever the volume is.
How much sand gravel and cement do you need to make 1 cubic yard of concrete?
500 pounds cement, 1500 pounds sand, 1600 pounds gravel. Mix with 32 gallons water
How many square feet does one pound of concrete cover?
How deep? Are you talking about dry mix weight or finished weight? Concrete weighs 150 pounds per cubic foot. So if you have a 6" slab, that's 150# for 2 square feet. For a 4" slab, the same amount will cover 3 square feet. For a 3" slab, 4 square feet. Concrete mix is commonly sold in 80 pound bags. The finished weight is the mix plus the water that gets chemically bound to it. There's a guide on the bag telling how many bags you need for a given area and thickness.
Why does a bag of cement weigh 94 pounds?
The weight of a 94 lb. sack of cement is incidental - the bag is packaged in that size in order to hold one cubic foot of cement, and 94 pounds is simply what one cubic foot of dry cement powder weighs. Mix design for concrete was originally performed by volume and not by weight. Mix designers were initially concerned about variations in density and thought volume would deliver the most consistent results. As time progressed, they found that mix design were not adversly affected when designed by weight, (which was also much simpler), and therefore became used industry wide. Because 94lbs of cement is, as noted above, what 1 cubic foot of cement weighs, the 94 lb sack was a backhanded way for the mix designers to check the weight calculations easily with known volumes.
