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RE: Concrete Exposed To Weather (Clear Cover)

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And limit water/cementitious materials ratio as required for salt and freeze exposure.

Bill Sherman
CH2M HILL / DEN
720-286-2792
 

> -----Original Message-----
> From: Jeremy White [mailto:admin(--nospam--at)structuralae.com] 
> Sent: Wednesday, August 05, 2009 6:56 AM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: Concrete Exposed To Weather (Clear Cover)
> 
> So epoxy coated bars, maximum clear cover and air entrainment 
> would make for a pretty good structure and hopefully not be 
> considered overkill.
> 
> I assume you would use air-entrainment on the LWC wearing course, too.
> 
> Thanks,
> Jeremy
> 
> 
> 
> Quoting Francis Hsi <hchfrank(--nospam--at)hotmail.com>:
> 
> >
> > 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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