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  1. #1
    Join Date
    Nov 2008

    Cool Returning a slab

    I removed a 5'x5'x4" slab of sidewalk, in one piece (still sore), to repair a water line. I now want to return the slab as it was. The slab was originally poured over 4 inches of pea gravel. The bottom of the slab is of course very uneven and pitted and uneven thickness: 3" to 5" thick in spots. I am not sure what to put down over the pea gravel to receive the old slab so as to get a good level fit. I have leveled the pea gravel down about 1.5 inches below where it was and planned to pour 1.5 inches of concrete then drop the slab back in place. I am concerned about:

    1) Gravel or viscosity in the new concrete preventing the slab from settling down to grade.
    - Should I use some type of grout instead of concrete.

    2) Not being able to apply enough pressure to get the slab down into the fresh concrete to grade.
    - Is there some type of vibrating device either beneath the slab or on it that will work the slab down to grade?

    What ever advice you can offer I'd appreciate.

  2. #2
    Join Date
    Jun 2007
    Fayette County, Ohio

    Default Re: Returning a slab

    If it were me, I would form and pour a new slab. If you go the most expensive rout of using a product like Quikrete concrete mix it would only be about $50 for a new 5' X 5' X 4" slab and a lot less work. By the way you can go here to calculate how many bags you would need
    Last edited by JLMCDANIEL; 11-12-2008 at 11:52 PM.
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

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