Most bags will make a 1/3 of a cubic foot of concrete.
yes they need to be set in concrete. depending on your fence, one bag of concrete per post should be enough.
An 80-pound bag of premixed cement = .667 cubic feet, or 2/3 of a cubic foot, of concrete. A 60-pound bag of premixed cement = .5 cubic feet, or 1/2 of a cubic foot, of concrete.
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.
No. If it's hard in the bag it must have gotten moisture in it which caused it to cure. It will make a handy doorstop though.
Most bags will make a 1/3 of a cubic foot of concrete.
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.
about 200 metrics
yes they need to be set in concrete. depending on your fence, one bag of concrete per post should be enough.
there are many types of concrete but they all seem to be high in price, but not too expensive...
NO!
The prices range. One of the cheaper bags is $800.
.375 cf per bag / 27 cf per cy = 0.13888 cy per bag 1 cy / 0.13888 cy per bag = 72 bags
Every 80lb concrete bag should be mixed with 4 quarts or 3.7 liters of water. This mixture will allow you to place aproximately .60cu/ft of concrete. There are 27 cu/ft in a cu/yd. The number then becomes .0222 yards per 80lb bag. Therefore 45 bags of 80lb (4000 psi) concrete ready mix will be enough for 1 yard of concrete.
one bag
You can get a SLR camera bag from stores like Macy's and Sears. It is a high quality camera bag, so it's expensive. You could also get one from the website eBay.
AN EXPENSIVE PLASTIC bag is stronger!