Yard of Concrete - One cubic yard of concrete is 3' X 3' X 3' in volume, or 27 cubic feet. One cubic yard of concrete will pour 80 square feet of 3 ½" sidewalk or basement/garage floor.
1 cubic yard of concrete. Measured as a 3′ x 3′ x 3′ area. One cubic yard is 27 cubic feet.
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For estimating purposes, you can make about 1 cubic yard of concrete with five 94-pound bags of cement, 14 cubic feet of sand, and 21 cubic feet of gravel. (It takes about forty 80-pound bags of prepackaged materials to make 1 cubic yard of concrete.
A yard of concrete is actually a cubic yard of material (27 cubic feet).
A minimum cement content of 6 bags per cubic yard of concrete,
A maximum water content of 6 gallons per bag of cement,
A curing period (keeping concrete moist) a minimum of 6 days, and ...
Sack Mix: The amount of Portland cement in a cubic yard of concrete mix. Generally, 5 or 6 sack is required in a foundation wall.
The number of bags or cubic feet of cement per cubic yard of concrete; see Cement Content.
Cement Fiber
A threadlike structure added to cement to stiffen and strengthen it.
Finally, the superplasticizers used to make fluid concrete are rather expensive. At an additional cost of $8 to $14 or more per cubic yard of concrete (1 cubic yard=0.76 cubic meters), the cost for a big project can really add up fast.
 See also: Concrete, Yard, Construction, Sidewalk, Home
  
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