Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 13 of 13
  1. #1
    Join Date
    Aug 2006
    Location
    Brighton East, Victoria
    Posts
    12

    Default Bagged Concrete Mix for Stump Pads ?

    Hi All,

    Yet another question for you guys.

    I am building an extension which needs about 24 stumps. I'm worried that if I get readymix and pour into each hole, it would have set before I have finished placing the stumps

    Can I use a bagged concrete mix instead and would it have the same strength as raedymix. I know its a little time consuming though ?

    Or am I worrying over nothing and do I order the readymix a little "wet" (dont know the exact terminology)

    Thanks
    Chris

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #2
    Join Date
    May 2005
    Location
    Turramurra, NSW
    Posts
    2,267

    Default

    Can't give you the tech specs on ReadyMix v bags, but with ReadyMix you state the grade u want. For this low grade work tho you just take the cheapest.

    Reason for posting was that the slabs for my sheds were laid respectively from ReadyMix and bags of concrete ex Bunnies.

    The Readymix is rock hard but I noticed when I was chiselling some drainage channels for the 'bags' slab it was noticeably softer, easily flaking off. The concrete was laid about 8 months ago so not still green.

    In your shoes I'd get the readymix and some mates to help, plus a slab or two of beer.
    Bodgy
    "Is it not enough simply to be able to appreciate the beauty of the garden without it being necessary to believe that there are faeries at the bottom of it? " Douglas Adams

  4. #3
    Join Date
    Oct 2002
    Location
    Doncaster East, Vic, Aus
    Posts
    146

    Default

    Chris,

    The concrete truck will have water, thus you can ask him to make it really wet. What you really need is a few extra hands. One to barrow the conc and you and another to be setting the stumps, at worst just you setting the stumps while the mrs barrows. Ask the driver to pour half or quarter barrow loads. You may have to pay extra if it takes longer than 15 minutes. And don't be afraid to tell him to take back what you don't need, but he will get ####ty if it is his last load. Use a string line, go row by row (start with the furtherest) You only need to set the stump so that it is barely touching the string line. You'll be surprised how fast you'll be able to do each one. Besides, depending on the soil, you will have more time than you think to work it.

    I'd hate to be mixing all the bags you'd need, you can use them, but it will be a hell of a lot more work.

    Cheers, Steve

  5. #4
    Join Date
    Oct 2004
    Location
    Gold Coast
    Age
    35
    Posts
    74

    Default

    Dont make the concrete to wet, making it to wet affects its strength. Most people think concrete is just concrete, its not, dont make it so wet if the stumps are taking load.

  6. #5
    Join Date
    Aug 2003
    Location
    Melbourne - Outer East Foothills
    Posts
    6,786

    Default

    We had about that many for our new deck and did them all with bags. No stress about getting all the stumps in before the concretet truck wanted extra time, took our our time to set the stumps just right etc etc. 2 bags per hole, could get the consistency just how we wanted it and easy to do.

    It's now holding up a spa with 1500L of water in it with no problems at all.
    If at first you don't succeed, give something else a go. Life is far too short to waste time trying.

  7. #6
    Join Date
    Mar 2006
    Location
    NSW
    Age
    68
    Posts
    283

    Default

    hi chris unless youv'e got 2or3 barrows,then i'd suggest bags.use rapid set bags, they set in 15 mins. i've used these at work for log barriers, sign posts.put the first bag in dry add some water,spear down around the mix with a spud bar so the water mixes in,put your next bag in add the water spear down through the mix with the spud bar again so the water seeps in. the less water used the stonger the concrete will be.(something to do with oxygen molecules in the water, the more water the more air gaps between the aggregate and sand which causes weaker concrete)
    cheers

  8. #7
    Join Date
    Aug 2003
    Location
    Melbourne - Outer East Foothills
    Posts
    6,786

    Default

    I don't think I'd use rapid set for stumps. Use normal.
    If at first you don't succeed, give something else a go. Life is far too short to waste time trying.

  9. #8
    Join Date
    May 2004
    Location
    Pakenham, outer Melb SE suburb, Vic
    Age
    54
    Posts
    4,158

    Default

    Agree, rapid set not suitable for structural work.


    The beatings will continue until morale improves.

  10. #9
    Join Date
    Oct 2004
    Location
    Gold Coast
    Age
    35
    Posts
    74

    Default

    About to say the same thing, structural work is not to be messed around with aye

  11. #10
    Join Date
    Feb 2003
    Location
    Garvoc VIC AUSTRALIA
    Posts
    11,464

    Default

    I used to put in 60 stumps from a minimix in 1 go by myself.
    24 stumps in 1 go of minimix would be easy as long as;
    all the holes are clean
    and the stumps just sitting in the holes
    with stringlines up,
    all you have to do is barrow concrete and lift stumps to the line
    Regards, Bob Thomas

    www.wombatsawmill.com

  12. #11
    Join Date
    Apr 2006
    Location
    Melbourne Victoria
    Posts
    621

    Default

    Concrete usually has 2 specs 40 mpa and 20 mpa. 40 for structural, so premixed bags are okay, but rapidset is only 20.

    If you use 2 bags per stump, that's 48 bags at about $300. Have you considered hireing a mixer, a metre of sand, and aggragate and a few bags of cement. Or if you would have future use, maybe buy a cheap mixer.

  13. #12
    Join Date
    Jan 2005
    Location
    Newcastle/Tamworth
    Posts
    520

    Default

    Readymix is actually available in any strength, 20, 25, 32, 40Mpa are common ones. Most driveways etc are 20Mpa, some factory floors are 32Mpa for example. Rapiset is not structural and less than 20Mpa.

    Adding water on site is a big no-no, read www.concrete.net.au, everything you need.

    Cheers
    Pulse

  14. #13
    Join Date
    Jun 2003
    Location
    brisbane
    Posts
    252

    Default

    If you use 2 bags per stump, that's 48 bags at about $300. Have you considered hireing a mixer, a metre of sand, and aggragate and a few bags of cement. Or if you would have future use, maybe buy a cheap mixer.
    this sounds like the best option to me

Similar Threads

  1. Help - Concrete Mix for Stumps
    By OBBob in forum CONCRETING
    Replies: 10
    Last Post: 6th March 2006, 07:33 AM
  2. Concrete Mix ratios
    By jlamplough in forum CONCRETING
    Replies: 21
    Last Post: 24th August 2005, 05:40 PM
  3. distance between concrete pads
    By hose a in forum CONCRETING
    Replies: 2
    Last Post: 16th January 2005, 02:02 PM
  4. Concrete over concrete
    By Sir Stinkalot in forum CONCRETING
    Replies: 4
    Last Post: 18th July 2003, 10:59 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •