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Concrete Slab on Sandy Soil

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  1. #1
    Novice
    Join Date
    Jan 2011
    Location
    Perth
    Posts
    36

    Question Concrete Slab on Sandy Soil

    Hi Guys,


    Planning on pouring a slab (10m x 1.5m x 120mm thick) on the weekend using concrete truck. The slab is for a brick planter box, it will have openings in the middle for drainage. i will be allowing for 100mm on each side of brickwork.

    I live in Perth and the concrete will be poured on very sandy soil!

    I am a little confused about the process, can you tell me if the following sounds right:

    1. Excavate area
    2. Lay out formwork
    3. Compact area (do i need to add road base? or is compacted sand ok?) also is a plate compacter ok or will i need a rammer?
    4. Lay black 200um plastic.
    5. add mesh
    6. pour concrete.
    7. finish off and float.
    8. cure


    Advice is much appreciated.

    Cheers

  2. #2
    Novice
    Join Date
    Jan 2011
    Location
    Perth
    Posts
    36

    Default

    No one?

  3. #3
    Registered User
    Join Date
    Apr 2010
    Location
    camden NSW
    Age
    59
    Posts
    608

    Default

    You may not need to compact it , it depends on what type of sand as to whether it will compact,try spaying a garden hose over an area and see what it feels like. the rest of the steps are correct.Good luck

  4. #4
    1K Club Member
    Join Date
    Nov 2008
    Location
    Sydney
    Posts
    1,108

    Default

    120mm seem light on for depth, (250mm would be my min.) how high will it be

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