Yup. you're right.
I went looking on wikipedia, with the thought that I could get to an
ASTM table which
might have dealt with slump vs. strength... struck out.
and slumped at my desk, in defeat.
Sorry if I misled anyone.
N2EA
On Jul 7, 2009, at 2:37 PM, k9mk@flash.net wrote:
> Slump is a term used to describe how consistent a concrete sample
> is from batch to batch. The test is more for consistency of the mud
> (wet versus soupy) . That gives the crew a relatively consistent
> mud to work with. When I poured my shop, there were 9 trucks
> delivering. Each truck had to pass the slump test before they were
> allowed to eject their loads.
>
>
> MK
>
>
>
> -------------- Original message from jim Jarvis
> <jimjarvis@optonline.net>: --------------
>
>
> >
> >
> > Julio Peralta wrote:
> >
> > > I've always wondered how the average guy can tell the difference
> > > between
> > > 2500 and 5000 PSI concrete when it's delivered. It's my
> > > understanding that a
> > > test cylinder has to be poured and sent to a lab to determine
> the PSI
> > > strength. Couldn't a concrete company tell you its 5000 PSI and
> > > deliver
> > > something much less than that?
> > >
> > > Julio, W4HY
> > >
> >
> > The only time I did this, we had a structural engineer on the team.
> > Before the
> > concrete was poured, he did a "slump" test. Poured a cone of the
> > stuff, and
> > measured how much it deflected downward. Evidently, that's an
> > indicator of
> > the eventual strength of the material.
> >
> > n2ea
> >
> > ps: I agree with Steve. By letting the concrete company know
> > you're testing,
> > they'll be careful to get the right stuff.
> > _______________________________________________
> >
> >
> >
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