How many 60 lb bags needed to cover a space of 28″X28″X3″?
Posted by John from Lancaster, CA, UM on June 3, 2007
How many 60 lb bags of premix cement NEEDED to cover a space of
28″ X 28″ X 3″ . Am using a wheel barrel to mix it in however, don’t know when to stop mixing , that is, using the water of course?
Please help me….am new to this, hard breaking back work and sweatty type of work, but it has to be done.
Also pouring cement in between 2″ X 3″ (measure above).
Counted about 15 squares of 28X28X3 and I figure about 75 sacks of premix cement…Am I way off?
Thank you,
John
Generally companies selling premix cement bags mention the amount of mortar or concrete produced by a bag of premix cement for a given quantity of added water. So look for the coverage on the premix bag.
The volume of the space you are trying to cover is 28” x 28” x 3” = 1.36 cubic foot. If the manufacturer claims a 60 lbs bag produces 0.42 cubic foot of concrete for a given water content, you will need 3.29 lbs of premix cement per hole. So, for 15 such holes you will need roughly 48 number of 60 lbs bags. But again, this is for an assumed amount of water, if the amount of water you add change, your yield will be different.
Alternately you can bring 3 or 4 bags to fill one space to get an estimate of how many bags are need to cover the remaining hollow spaces.
