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A 94 lb bag of cement consists of 94 lbs of cement. I mean, isn't it obvious? The cement is used to make sidewalks, etc. They dry and is some of what we walk on today. :)
Concrete is measured in metric volume via cubic yards. Standards consider a 94 lb. bag of cement to be one cubic foot when freshly packed. 94 evenly fits into the 1-2-3 mix ratio when figuring the recipe 1 part cement- 2 parts gravel- 3 parts sand to make concrete.
The 30 x0 20 x 4" answer should be for a 50kg bag. A 25kg bag of cement is 43 x 22 x 14 cm according to Blue Circle on Amazon, that is 17" x 8.6" x 5.5" in old money.
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.
80 lb bag yields about 0.6 cu ft per Quikrete specs:fNote: the question really refers to concrete not cement.
70 lb = 31751.465 g or 31.751 Kilo's
This all depends on the mix you want. I assume you mean cement when you mention the 80lb bag of concrete. I have pushed concrete in my day... Bag cement mix is the same as concrete. Don't be funny. How many 80 pound bags will make 1 yard of concrete? I want a definitive answer this time.
~ 1 cu. ft.
Imagine a cube 3' x 3' x 3' . that is a cubic yard. I believe a bag is 1/3 of a yard. No It's less than that one 94 lb bag of Portland cement is one cubic foot. And there are 27 cubic feet in a cubic yard ( 3*3*3 = 27) so an 80 lb bag of premix is a little less than 1/27th
Depending on the use of the concrete, between 5-6 bags.
16 oz = 1 lb ⇒ 94 oz = 94 ÷ 16 lb = 5 lb 14 oz = 57/8 lb = 5.875 lb
5 or 6. An 80 lb. bag of ready mix concrete will make about 1/2 cubic foot of concrete. A 94 lb. bag of portland cement mixed with 1 1/2 cu. ft of stone (coarse gravel) and 1 cu. ft. of sand will make 3 cubic feet of concrete or 6 times as much. (this is a common 1:2:3 mix) Quikcrete ready mix is often made with 1 part cement, and 2 1/2 parts each sand and stone. A 1:1 1/2: 3 mix is a stronger mix but you get less volume, at 5 1/2 cubic feet per bag of cement.