You are watching: How many cubic feet in a bag of portland cement

### AuthorTopic: Volume the concrete indigenous one bag the Portland cement (Read 61370 times)

n74tgSenior MemberPosts: 576Hot Springs, AR
I'm trying to number how many bags of Portland come buy to mix the concrete for my former porch. I need right at 14 cft of concrete. I'm making use of a 3:2:1 mix (rock, sand, Portland). As 3+2+1 = 6 and also I need around twice that in volume, I'm figuring around 2.5 cft of cement. The concern is "how numerous cubic feet" that Portland (Type 1) in a 92 lb bag. I found two various numbers top top the internet. One claims Portland weighs 1506 kg/m3 (cubic meter), which converts to 93.85 lbs/cft, so a 92 lb bag is ideal at 1 cft that Portland. The various other number states Portland is 3150 kg/m3, i m sorry is about twice the very first number. Anybody got any experience through this. Maybe another means to asking this is one bag of Portland, if using a 3:2:1 mix yields how many cft that concrete. Thanks
If you walk to Decks.com and click top top the calculator tabs in ~ the top, you have the right to do part figuring there. It provides calcs for 60 and 80 pound bags. Yet it additionally gives volume.I plugged in and a cubic yard will certainly require just over 40 bags the 80 lb bags. Climate if you plugin a cubic foot, that will need 1.5 bags that the 80 lb concrete. The volume is .04 cu yard.I do not recognize if this helps or not.mt
Thanks Mike, however that website offers me the info I already have; in other words volume of concrete needed. The number of 40 or 80 lb bags is because that premix concrete (already has sand and gravel). I mix mine from life ingredients due to the fact that it is significantly cheaper the way.
I remember hear the concrete plant owner try to describe to me what the different mixes were. Something to the result that a 4 bag mix was 2,000 PSI, 5 bag
2500 and each bag added ups the PSI by 500. That was for a Cu yd. I think gravel or aggregate constitues around 60 % mix with water adding about 15% the the mix. Provide your regional redy mix tree a call and also maybe acquire some answers. Ours is real useful well at least to me anyway as I have probably bouight 150-200 yards in the critical 10 year or so. Tiny stuff I normally mix my own. Don't really have actually the numbers as i just have actually the three major components and also mix what ns need. Much more of a guestimate really. Yet nothing yes, really goes come waste.I am choose you . I Googled some for the answer by basickly they to be sponsered by pre-mix and not cement plus other portions come make.

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