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RE: Concrete Exposed To Weather (Clear Cover)

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Daryl,
 
Don't forget the air entrainment in the concrete also.
 
Regards!
 
Francis Hsi
 
> From: h.d.richardson(--nospam--at)shaw.ca
> To: seaint(--nospam--at)seaint.org
> Subject: Re: Concrete Exposed To Weather (Clear Cover)
> Date: Tue, 4 Aug 2009 16:43:53 -0600
>
> Scott,
>
> We in Canada have the same problem. As you probably know we use
> epoxy coated rebar to combat that problem.
>
> Regards,
>
> H. Daryl Richardson
>
> ----- Original Message -----
> From: "Scott Maxwell" <smaxwell(--nospam--at)umich.edu>
> To: <seaint(--nospam--at)seaint.org>
> Sent: Tuesday, August 04, 2009 4:34 PM
> Subject: RE: Concrete Exposed To Weather (Clear Cover)
>
>
> > Personally, I would assume maximum exposure for a parking deck. Of
> > course,
> > I am biased by the fact that I am in Michigan where we salt the crap out
> > of
> > everything. Some pitiful, lonely snow flake falls on the road and we back
> > up a salt truck and dump a hugh pile of salt on it.
> >
> > Point being that the water from run off from melting/melted snow/ice in
> > the
> > winter that gets "misted" up into the air will be full of salt ions and
> > will
> > likely still reach the bottom of the deck above. And this assumes that
> > your
> > wearing course and waterproof membrane never have issues that might result
> > in water getting onto the bottom from above.
> >
> > Regards,
> >
> > Scott
> > Adrian, MI
> >
> > -----Original Message-----
> > From: Jeremy White [mailto:admin(--nospam--at)structuralae.com]
> > Sent: Tuesday, August 04, 2009 4:29 PM
> > To: seaint(--nospam--at)seaint.org
> > Subject: Concrete Exposed To Weather (Clear Cover)
> >
> > The concrete parking deck I am working on will have a wearing course.
> > Would the slab and beams that support the wearing slab be considered
> > exposed
> > to weather therefore requiring a 2" clear cover?
> >
> > The underside of the slab (and beams) is exposed to the effects of
> > temperature change but will never see rain. The top side is not exposed
> > to
> > water because it is protected by the wearing course and a waterproofing
> > membrane. So I think 1.5 inches is sufficient. Is there any consensus on
> > this issue?
> >
> > - Jeremy
> >
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