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RE: Form release oil

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Min of 30 revolutions or 3 minutes.

Arvel

-----Original Message-----
From: John Riley [mailto:jpriley485(--nospam--at)yahoo.com]
Sent: Tuesday, July 12, 2005 8:58 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Form release oil


Arvel,

No, I didn't specify a delivery slump.

It's good to know that rule of thumb, 1 gal/cy/in

We poured 5 yards and added 5 gallons right away, but
that wasn't enough.  15 gallons would have been
better.

Upon adding water, how long should it be mixed before
pouring?

John Riley



--- "Arvel L. Williams, P.E."
<awilliams(--nospam--at)gwsquared.com> wrote:

> John,
>
> Did you specify a certain delivery slump.  Say 4"?
>
> The rule of thumb is 1 gallon of water per yard per
> inch of slump.
>
> So to get a 9 yard truck from 2 to 4 inches you need
> 18 gallons.
>
> You can add water to the mix once, but I usually
> don't add more than 20
> gallons if possible.
>
> Arvel
>
> -----Original Message-----
> From: John Riley [mailto:jpriley485(--nospam--at)yahoo.com]
> Sent: Monday, July 11, 2005 4:15 PM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: Form release oil
>
>
> Arvel,
>
> I was slightly exaggerating.  But the mix was so
> stiff
> it wouldn't slide down the chute.  It certainly
> should
> have been more workable than that.
>
> John Riley
>
>
> --- "Arvel L. Williams, P.E."
> <awilliams(--nospam--at)gwsquared.com> wrote:
>
> > John,
> >
> > Don't add water until it is soup.  The long term
> > problems are immense.
> >
> > Use a retarder, or have adequate people to work
> the
> > concrete.
> >
> > Arvel
> >
> > -----Original Message-----
> > From: John Riley [mailto:jpriley485(--nospam--at)yahoo.com]
> > Sent: Monday, July 11, 2005 3:08 PM
> > To: seaint(--nospam--at)seaint.org
> > Subject: Form release oil
> >
> >
> >
> > Tom,
> >
> > Thanks for responding.  Is WD40 diesel fuel?  I
> > figured it was just a light oil mixed with a
> > solvent.
> > Anyway, we used plain ol' 10W30 motor oil on the
> > forms, they came off very nicely.
> >
> > The concrete pour was a disaster!  The area was
> > 8'x40', by the time we finished pouring, the
> > concrete
> > had set up on the far end.  I tried to bull float
> > it,
> > but it just scraped along the top without
> > indentation.
> >  Within 2 hours of the start of pouring, a 4
> legged
> > chair + 230 lb man (OK, 250 lb, no reason to lie
> to
> > you) wouldn't leave a mark.  Got the worst of the
> > ridges knocked down with hoes and shovels.  Next
> day
> > applied muratic acid, which exposed the aggregate
> > fairly well.
> >
> > Next time I'll add water until we're working with
> > soup.
> >
> > JPRiley
> >
> >
> >
> > --- Tom Skaggs <tom.skaggs(--nospam--at)apawood.org> wrote:
> >
> > John,
> > Sorry I missed your pour, but for what it's worth:
> > I traded e-mails with one of our members who
> > specializes in plywood concrete form.  According
> to
> > him, they DO NOT recommend using Diesel as a
> release
> > agent.  The quality of the finish is apparently
> > compromised and VOC laws "do not allow it's use
> > anymore" (I've not confirmed the law..).  His
> > perspective is maintaining a forming product for
> > multiple pours, even more if the concrete form has
> > an
> > HDO overlay.  They recommend using Nox-crete, and
> in
> > fact apply Nox-crete at the plywood plant.
> Contact
> > is: 1-800-Nox-crete for your local distributor.
> I'm
> > sure there other release agents that work well to,
> > so
> > I'm not endorsing Nox-crete...
> >
> > Given the scope of your project, I'd think
> Nox-crete
> > might not be necessary.  But as a general release
> > agent, some companies might frown on using Diesel
> on
> > their products.
> >
> > Tom
> >  -----Original Message-----
> > > From: John Riley [mailto:jpriley485(--nospam--at)yahoo.com]
> > > Sent: Thursday, July 07, 2005 21:51
> > > To: seaint(--nospam--at)seaint.org
> > > Subject: Form release oil
> > >
> > > I'm pouring a 4" exposed aggregate patio on
> > > Saturday.
> > > Well, 3 1/2", because the forms are 2x4.  I want
> > to
> > > reuse the forms and
> > > am wondering if I'd be doing damage to the
> > concrete
> > > if I used WD40 as a
> > > release oil . . . I buy it by the gallon anyway
> > and
> > > it is handy.
> > >
> > > Today I purchased the retarder to spray on the
> > > exposed surface for $60
> > > per 5 gallons and the sealer that makes it all
> > shine
> > > nicely at $90 per 5
> > > gallons.  I don't want to be thrice bitten by
> > > purchasing special form
> > > release oil that is probably WD40 anyway.
> > >
> > > John P. Riley
> >
> >
> >
> >
> >
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