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tammys

09:27AM | 04/15/03
Member Since: 03/12/01
40 lifetime posts
Bvmisc
We are installing a concrete driveway this spring. We live in Illinois with hard winters and lots of ground heave.

What's the minimum concrete thickness we should use? I've been told 6" would be good. do we need to consider more?

I've also been told a 3-4" subbase with well compacted sand, instead of stone.

What are your thoughts?
Thanks in advance.

treebeard

10:10AM | 04/15/03
Member Since: 01/14/03
265 lifetime posts
Minimum 8" compacted gravel base (or crushed stone...not sand) overlaid by your slab, minimum 6", 3500 psi concrete, with WF6x6 (wire fabric) reinforcing at mid-depth within the slab.

I live in New England, where winters can be just as bad, if not worse.

Lawrence

06:07PM | 04/17/03
Member Since: 11/14/00
333 lifetime posts
Exactly what Tolkien-boy said.

Kirks_post

07:41AM | 04/26/03
Member Since: 04/13/03
10 lifetime posts
You can also check out what is call fiber mesh which most concrete manufacture are adding for strength. I've had outstanding luck with the additive and was able to eliminate using the WF6X6. To put my two cents in,, use gravel not sand.

Kirk

BV003274

08:47PM | 02/16/14
Hi there,
I just put a new concrete driveway last September here in MN and is heaving a lot with the cold temperatures, at least 1.5" to 2.00". At this point I think is nothing I can do. The driveway was packed with nice base and class 5 and re-bar reinforcing the driveway but still move a lot. My question is if this can be fix anyhow building dry-wells around the driveway to try to pick up the moister as much as I can in the ground around the driveway. I know we have a lot a clay in this area but I don't know if this will work or not. If anybody know and can answer me back it would be great.
Thanks.
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