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    smittyoo7's Avatar
    smittyoo7 Posts: 1, Reputation: 1
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    #1

    Sep 6, 2010, 01:38 PM
    Concrete driveway falling apart. Is there something that can be poured over concrete
    My drive way is about 25 years old, Its breaking up into rocks that were used in the mix. I have large pot holes. I don't have the money to break up and replace at this time. Is there any thing on the market that I can put on top of it.
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
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    #2

    Sep 6, 2010, 02:09 PM

    You can repair the potholes and maybe seal the cracks. But the problem is you would be pouring over a unstable base if you try to do the whole driveway with just a topcoat. Since it would be on unstable footing it will crack all over again.
    smearcase's Avatar
    smearcase Posts: 2,392, Reputation: 316
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    #3

    Sep 6, 2010, 05:37 PM

    I worked in construction inspection for a state highway agency for a long time and I remember seeing presentations on a method of reconstructing badly deteriorated concrete roadways using a procedure called "Crack and Seat". I realize that you don't have access to the equipment shown on these slides but the pictures will help explain the concept. Also, you would have to have room to add a few inches of hot mix asphalt (hma)on top, amount to be determined by the hma contractor, and you may have to dig and build some transition aprons on both ends---drainage away fromgarage if applic?
    The old concrete is first broken into max. size pieces (you would have to research for rec). A large roller is then used to seat the pieces (wire mesh and rebar would have to be cut if present.
    http://www.ucs.iastate.edu/mnet/_rep...and%20Seat.pdf

    It is a long shot and depends on several factors: 1) size of driveway, 2) feasibility of raising elevation sev. Inches, 3) can you do your own breaking with a rented jack hammer? 4) amount of rebar and/or mesh to contend with, and lastly the real biggies--Can you find a contractor willing to bring in large roller to seat the pieces and give a decent warranty on an overlay with hma?
    I am just guessing but if you can connect all the dots here, this procedure would cost about half of a total concrete replacement or new sub base and courses of hma and should hold up. You don't say if there are drainage problems and/or settlement--if there is--this is not the answer!
    Excavating and disposal add cost fast for total replacement.
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