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Mosey
Gold Member

Reged: 09/12/02
Posts: 436
Loc: Southern Indiana
stones in fill dirt
      10/30/02 12:12 PM
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Are stones, ranging in size from 2" to 6" in dia, good or bad in fill dirt for an area to be poured with concrete? I'm wondering if I should sift though it and get them out or leave them in.

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beenthere
Gold Member

Reged: 09/30/02
Posts: 343
Loc: midwest
Re: stones in fill dirt new [re: Mosey]
      10/30/02 03:36 PM
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Seems if the stones don't impede you packing the dirt for a base under the concrete, then they shouldn't hurt anything. You want a dense material for a base, and it can't get any denser than stones. But if using a tamper to tamp the fill doesn't work because of the stones, then they are not good to have.

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tenebrous
Gold Member

Reged: 09/11/02
Posts: 413
Loc: Geneseo, New York
Re: stones in fill dirt new [re: Mosey]
      10/30/02 04:26 PM
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We always take the larger stones out and leave the 6 inch and under in the fill.

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Carl
Member

Reged: 09/11/02
Posts: 76
Loc: Rocky NH Coast
Re: stones in fill dirt new [re: Mosey]
      10/30/02 08:13 PM
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Depends on the depth of the rough fill (2-6" stones) because as mentioned if it doesn't pack down, voids will develop in the fill causing settling in the future. I would think that 12" or less properly compacted of the rough fill topped with 3-4" of 3/4" crusher run stone (combination of 3/4 and fines) compacted is the best way to go. Also cutting concrete every 12' to prevent the slab from cracking is preferred.



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Mosey
Gold Member

Reged: 09/12/02
Posts: 436
Loc: Southern Indiana
Re: stones in fill dirt new [re: Mosey]
      10/31/02 06:59 AM
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Well, it sounds like the best thing is to just leave them in, which is what I thought. Thanks!

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