Taking account for compaction??

Discussion in 'Heavy Equipment & Pavement' started by KrayzKajun, Nov 2, 2013.

  1. KrayzKajun

    KrayzKajun LawnSite Fanatic
    Messages: 10,737

    Pricing a winter job of filling in a lot for a homeowner. Lot is 83' x 140'. Front and rear of lot are just about level. At lowest point the middle of lot is 19.5" below grade. The rest front front/back to middle runs from 2" to 19.5" in middle.

    I figured at approx of fill across while lot would bring it to grade and should accnt for compaction. Should my number for the amount of fill be more? Now from left to right there is a grade level hump on left side but nothing on right side. So we would have to completely build up that side.

    I came up with around 700cuyds of material needed.
    We will be using a D3 or possibly a D5 Dozer to spread and compact.
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  2. whiffyspark

    whiffyspark LawnSite Fanatic
    Messages: 6,560

    Use a sheep foot roller to compact. Dozer won't compact enough
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  3. Scag48

    Scag48 LawnSite Fanatic
    Messages: 6,067

    I figure 25-30% compaction factor when using compaction equipment. Is this just a lot and nothing will be built on it? If so, dozer compaction should be no more than 10% I'd wager. Depends on material really, but that's a rough estimate.
  4. KrayzKajun

    KrayzKajun LawnSite Fanatic
    Messages: 10,737

    Nothing will be built on it for at least another year maybe longer.
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  5. AWJ Services

    AWJ Services LawnSite Platinum Member
    from Ga
    Messages: 4,281

    It really depends on the type of soil.
  6. KrayzKajun

    KrayzKajun LawnSite Fanatic
    Messages: 10,737

    This will be batcher dirt. It's a river clay/dirt mix.
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  7. ksss

    ksss LawnSite Fanatic
    Messages: 7,168

    Whenever I do jobs even as simple as this I make sure I include in the bid that the material will or will not be compacted to a certain density and whether or not it will be tested. The issue is someone builds a slab on grade building and the material settles causing issues guess who the first call goes to? It will be the guy who brought in the fill and "compacted it".

    This may be over thinking this particular project, but just keep in mind when you bid things like this, what the end use will be. I am very specific when I write bids on jobs like this. I have seen some crazy issues come out of seemingly simple jobs concerning compaction.
  8. Junior M

    Junior M LawnSite Fanatic
    Messages: 13,606

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  9. meets1

    meets1 LawnSite Gold Member
    Messages: 3,857

    I agree...compaction is huge. Bid it with compaction to usual spec in your area
  10. KrayzKajun

    KrayzKajun LawnSite Fanatic
    Messages: 10,737

    We are just filling in the lot to level it. In the future when they build, it will have to be built up to code, plus pilings will be put in also before the slab is poured.
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