grouting sandstone paver patio

Discussion in 'Bricks, Masonry and Concrete' started by stevenbohrer, Aug 1, 2006.

  1. Aug 1, 2006 #1

    stevenbohrer

    stevenbohrer

    stevenbohrer

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    Hi All,

    Hoping for some input. I've installed about ~600sf of square cut, 1" thick, sandstone pavers around a pool... looks great. Now I'm grouting the installation. Have used a grout release product so it won't stick. Did a small section and am noticing white staining/streaks at the grout/stone intersection.

    Does anyone know what this is? I think I heard somewhere where the lime from the original cement base can cause problems, is that what I'm seeing? Is there a way to get rid of it?

    Thanks,

    Steve
     
  2. Oct 26, 2009 #2

    bigeyes

    bigeyes

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    If you are creating this paver patio from concrete pavers, chances are you are noticing a byproduct of concrete called effloresence. If they are brick then it could effloresence being released from the concrete under the brick. I would use an effloresence cleaner first and if that doesn't work you might try muratic acid, just be sure to do a small test area first.
     
    Last edited: Oct 26, 2009
  3. Oct 26, 2009 #3

    mudmixer

    mudmixer

    mudmixer

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    Sandstone is a sedimentary rock and can contain many materials depending on where it comes from.

    How old is the concrete base?

    Dick
     
  4. Oct 29, 2009 #4

    itsreallyconc

    itsreallyconc

    itsreallyconc

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    you're laying pavers OVER the conc pool apron ? ? ? couple dabs of const adhesive to hold 'em in place IF NEEDED & apply mortar w/sock,,, if you've got an efflorescence problem you'll either need to replace the apron OR apply a vapor-impermeable barrier to it.
     
  5. Feb 1, 2010 #5

    subzero

    subzero

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    I think If they are brick then it could effloresence being released from the concrete under the brick...
     

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