How many square feet in an 80 lb bag of cement?

lunajade(6)May 20, 2004

Can anyone tell me how many square feet I would get out of an 80 lb bag of cement? I plan to use 2x4's turned on their "2" inch side to make my forms when I pour the concrete. That way I would have a deep enough depth (approx. "4") to make pavers for my garden path. I believe I read somewhere that there is approx. 4 sq feet in that amount of cement.

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bambooo(6 CT USA)

80 lb bags of pre mixed concrete are 2/3 cu ft

    Bookmark   May 20, 2004 at 12:12PM
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Concrete and cement are not the same thing.

    Bookmark   May 20, 2004 at 6:36PM
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mount of ground... curiously it is a good questin that isn't answered on the bag, never knew why it doesn/t ... so at 4 inches deep 2/3 of a cubic foot will cover 2 sq ft...... but of cours you wouldn't use cement you would use either mortar or concrete... but then a four inche thick paver is really quite thick! 2 inches with rebar and micro fibers would do nicely. ... so you could get 4 sq ft out of a bag...
;=) A

    Bookmark   May 20, 2004 at 11:52PM
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I do tend to use the terms concrete and cement interchangeably. Did I mean an 80 lb bag of concrete???
The project I have in mind is to replace a garden path which meanders around the entire yard. The path right now is covered with a type of mulch (my supplier calls it playground mulch). This has to be replenished every 2nd or 3rd year. I would like (I think) to replace it over time with concrete pavers. I would also like to embed various found objects into the concrete such as smooth pebbles etc. just to make it more interesting than plain concrete. But I would keep that sort of thing quite simple. Thanks for your input.

    Bookmark   May 21, 2004 at 8:39AM
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mjsee(Zone 7b, NC)

Concrete is a mixture of cement and aggregate. You can buy bags of cement, and add your own aggregate, and MAKE concrete. Alternatively, you can buy pre-mixed sacks of CONCRETE and just add water. You probably meant concrete. I have no idea how many feet in a bag--the bag probably says.


    Bookmark   May 21, 2004 at 10:31AM
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kimzuki(z5 Wa)

If you don't mind sweating a little, you can usually buy a nice playground mix of sand, and a sac of portland, and mix your own in a 5 gallon bucket using an electric drill and mortar bit. Measure how much sand it takes to fill your molds. Use a 1part cement to 2 parts or even 3 parts sand and add water (Will vary greatly on each batch) I make my own pavers and only do 6 at a time, but only mix enough cement for 3 at a time. They are about 15"x15"x21/2" and each one weights approx. 20lbs. I have a few that are 4" thick by 30" and they weigh 120lbs. Not fun to move at all. At 21/2 " and a high portland ratio, a car can drive on them once they are cured. I like making my own mix because I have control of the consistancy, I started out using a pre-mix, and it varies with brands, what size aggregate. Most importantly, you need to use the entire bag each time, as the portland may settle in the bag unevenly. I purchased the sand from a local retail by the yard at about $10 a yard. Portland is cheap also, so my pavers are costing about $1.00 including the cost of the molds($500.00) another thing to remember is that you can always add more water, but not more cement to your mix. MIght also want to think about a release agent for your forms, if you plan on reusing them again.

    Bookmark   May 22, 2004 at 12:56AM
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Marianna_MI(5 (6-ish) MI)

If anybody's still following this thread, can you tell me where you find molds for home-made concrete pavers?

    Bookmark   June 28, 2004 at 5:52PM
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zeuspaul(9b SoCal)

Butler's craft supplies has them.

Here is a link that might be useful: Butlers Crafts

    Bookmark   June 28, 2004 at 10:57PM
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Did you ever get a answer?

    Bookmark   November 6, 2006 at 10:34PM
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Pre-formed patterns for pavers can be located at Home depot, Lowe's. Rona, or other building supply stores.

    Bookmark   April 17, 2007 at 1:41PM
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robin303(8b Tx)

Try something different. Blow off the pavers and pour your concrete [1 to 3 ratio or bags] then after screeding put rock salt on top and trowel in. After it rains the salt dissolves and leave a very nice effect. Another trick I use is to mix the concrete a little wet then after several hours put pet food in the middle of your work and in the morning you will have fossils. Your freinds will really love this.

    Bookmark   April 22, 2007 at 10:19PM
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I just went to the Quikrete web site. They have a calculator for bags per square feet.

Here is a link that might be useful: Quantity Calculator

    Bookmark   July 11, 2011 at 9:50AM
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    Bookmark   June 4, 2014 at 7:41AM
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