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Re: Slab Curl

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Wouldn't it just be easier not to put wet paper on top of the concrete? I've
also heard that the use of heavy steel beams to weight the corners down may
work - hence the origin of the term "curling irons".

Jim Cohen
jccpc(--nospam--at)msn.com

----- Original Message -----
From: "Jim Kestner" <jkestner(--nospam--at)somervilleinc.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, March 21, 2000 9:18
Subject: Re: Slab Curl


> Randy:
>
> Slab curl is normally caused by a differential of moisture content
> between the top and bottom surface of the slab. Similar to a wet paper
> drying on a desktop where the top surface drys quicker then the
> bottom........the edges curl up. A vapor barrier on the bottom of the
> slab will accentuate this problem.
>
> Solutions to minimize curling in future slabs are:
>
> 3 " of stone shavings over the vapor barrier
>
> closer spacing of control joints
>
> larger aggregate in slab
>
> good curing
>
> do not overly wet the subbase
>
> thicker slab
>
>
> I hope this helps!
>
>
> Jim Kestner, P.E.
> Green Bay, Wi.
>
>
>