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Thread: Mixing concrete formula

  1. #1
    Join Date
    Feb 2004
    Location
    Slippery Rock, PA
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    549

    Mixing concrete formula

    Hello All

    I have a quick question
    I know that the mix for concrete is 3 gravel 2 sand 1 cement
    the question is this
    Is this based on weight or volume

    thanks for your help I'm sure this is writen somewhere just can't find it

    ken
    Epilog Laser, CNC equipment, Corel X3 & 4, Aspire

  2. #2
    Join Date
    Jan 2004
    Location
    Lewiston, Idaho
    Posts
    23,805
    Ken,

    I could be wrong but I think it's based on volume. I've seen Tommy on TOH instruct Kevin to use a shovel 3 parts, 2 parts, 1 part.
    Ken

  3. #3
    Join Date
    Feb 2003
    Location
    Mtl, Canada
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    1,806
    Quote Originally Posted by Kenneth Hertzog View Post
    Hello All

    I have a quick question
    I know that the mix for concrete is 3 gravel 2 sand 1 cement
    the question is this
    Is this based on weight or volume

    thanks for your help I'm sure this is writen somewhere just can't find it

    ken
    Ken.
    I have a pdf from the Portland Cement Institute on concrete ratios but cannot upload this pdf to the forum because it is too large.
    Last edited by Chuck Wintle; 06-30-2008 at 9:15 AM. Reason: add info

  4. #4
    Join Date
    Oct 2006
    Location
    Mid Michigan
    Posts
    3,551
    My dad used 3 shovels gravel 2 shovels sand and one shovel of cement. His formula worked fine.
    David B

  5. #5
    Join Date
    Feb 2003
    Location
    Mtl, Canada
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    1,806
    Page 1 on making concrete
    Attached Files Attached Files

  6. #6
    Join Date
    Feb 2004
    Location
    Slippery Rock, PA
    Posts
    549

    Cement

    Charles
    thank you for the page it will be very helpful.
    I have a three point hitch cement mixer
    it will mix .8 yrd was wondering which is better
    that page describes it very well
    ken
    Epilog Laser, CNC equipment, Corel X3 & 4, Aspire

  7. #7
    A local fellow here told me that when building a stone wall that I need to get the thermal properties of the mortar about the same as the stones and the only way to do that was to use more sand and less cement. LOTS more sand. -------------------------------------------------------------------------------------------------------------------------------------- Otherwise the mortar will separate from the stone in the first few winters.

  8. #8
    Join Date
    Feb 2003
    Location
    Tampa, FL
    Posts
    950
    Brick mortar does always seem very "sandy". Of course being lazy, I would just pick up a bag of premixed brick mortar and not try to mix myself!

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