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RE: Form release oil

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Mix at a medium speed for at least 5 minutes (gives
about 75 revolutions of the drum).

Paul.
Phoenix, AZ


--- John Riley <jpriley485(--nospam--at)yahoo.com> wrote:

> 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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> 
=== message truncated ===



		
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