The amount of rebar depends on the thickness of what you are making. All three dimensions.
20' by 26' by 5" requires at least 10 cubic yards of cement.
A minimum of 1.23 cubic yards at 4" thick.
Assuming you use the standard 4" depth, you will need at least 1.75 cubic yards.
28 feet by 32 feet by 6 inches thick requires at least 16.59 Cubic Yards.
To determine how much cement you need for a 20x20 foundation, first calculate the volume of the foundation in cubic feet. If the foundation is, for example, 4 inches deep, convert that to feet (4 inches = 1/3 feet), giving you a volume of 20 x 20 x (1/3) = approximately 133.33 cubic feet. Since concrete is typically measured in cubic yards, divide that by 27 (cubic feet in a cubic yard), resulting in about 4.94 cubic yards of concrete needed. For cement, you'll need about 1/3 of that volume in cement, which is roughly 1.65 cubic yards, but it's best to consult a concrete mix calculator for precise ratios based on your specific mix design.
As much as the engineered load calls for to perform the task the cement is required to perform.
20' by 26' by 5" requires at least 10 cubic yards of cement.
Three and one-quarter million cubic yards. There are 4,360,000 cubic yards of concrete in the dam
If you pour to a 4" depth, you will need at least 24.89 cubic yards. If you use a 6" depth, you will need at least 37.33 cubic yards.
A minimum of 1.23 cubic yards at 4" thick.
3 cubic feet or about one-tenth of a cubic yard. Cement is generally quantified in yards or cubic yards. It takes 27 cubic feet (3x3x3) to make a cubic yard. Therefore 3 cubic feet is about .111 or about one-tenth of a cubic yard (3 divided by 27).
Answer #1:9 cubic yards cement weight nearly 1260 lbs=============================Answer #2:Answer #1 is a very intriguing one. It says that 9 cubic yards (9 x 27 cubic feet)of cement weighs nearly 1,260 pounds. If so, then each cubic foot would weighnearly 5.2 pounds, which corresponds to nearly 8.3% of the density of water.So cement would float quite high in water. Mysteriously, it doesn't.I found one online conversion reference that says that1 cubic foot of Portland cement weighs 94.02 pounds.(94.02 pounds/cubic foot) x (9 cubic yards) x (27 cubic foot/cubic yard) = 22,847 pounds(rounded)Somehow, that sounds more like it.Also, if the question actually meant 'concrete, limestone with Portland cement"instead of 'cement', then the weight is nearly 60% greater than that.
13 1/3 cubic yards
Assuming you use the standard 4" depth, you will need at least 1.75 cubic yards.
You'll need 3.53 cubic yards of cement.
9' by 18' by 4" thick requires at least two cubic yards.
To calculate the amount of cement needed, first convert the dimensions of the sidewalk into cubic yards. The sidewalk's volume is ( \frac{4}{12} ) feet thick × 3 feet wide × 40 feet long = 40 cubic feet. Since there are 27 cubic feet in a cubic yard, the volume in cubic yards is ( \frac{40}{27} \approx 1.48 ) cubic yards. At $76 per cubic yard, the total cost would be approximately ( 1.48 \times 76 \approx 112.48 ).