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RE: Swimming pool concrete fill[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Swimming pool concrete fill
- From: "Jerry Coombs" <JCoombs(--nospam--at)carollo.com>
- Date: Thu, 20 Sep 2007 06:10:58 -0700
I'd fill it with dirt, and place an aluminum or fiberglass pre-fab pool in the hole. Phenomenally fewer problems... and likely cheaper in the long run.
Flowable fill is often more expensive than concrete, and no benefit in this case. Retarders and flyash would reduce heat of hydration.
Aggregate base would fill w/ water and cause problems. The foam idea would also get water between the original pool and foam and would float the slab right out when drained for maint.
>>> "Garner, Robert" <rgarner(--nospam--at)moffattnichol.com> 9/19/2007 4:11 PM >>>
I think the term "flowable fill" is a new term and you might ask the ready-mix plants for a lean concrete mix, or just a standard concrete mix with only 1 c.y. of cement in it. Some people call this a 500 psi mix or a "diggable" mix.
From: Jim Wilson [mailto:wilsonengineers(--nospam--at)yahoo.com]
Thought about the sand - they are concerned that existing cracks in the pool and a high water table could lead to erosion of the sand. Maybe wrapping it in a 6mil barrier would protect it adequately. Then again, there could be an issue with slab uplift on sand when they drain the pool, especially if they drain it in the winter months.
Flowable fill is great, but I've tried the redi-mix plants on this before and they really don't know the product. The volume doesn't warrant the hurdles. This is the Poconos after all....
Gravel could work, but they like the speed with which the hole can be filled with concrete.
And for the record, this is not an engineered design and I am not sealing or stamping or detailing anything. And I'm not about to formally design an infill slab on fill within an existing non-engineered pool. I'm just raising issues for an old-time mason and a site superintendent to think about.
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