Hi Roger,
Did you find that the fiberglass reinforced concrete had little slivers of
fiberglass constantly coming out of it? Also when finishing it was there a
problem with the fiberglass?
Thanks
Gary K4FMX
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of K8RI on Tower talk
> Sent: Tuesday, January 24, 2006 12:50 AM
> To: Eg9k@aol.com; towertalk@contesting.com
> Subject: Re: [TowerTalk] Rebar cage - ???
>
>
>
>
> > Hi all - This past summer I had a 24' x 30' slab poured 4" thick with
> a
> > 3'
> > x 4' by 16' deep at one corner to build a barbecue on it. I was
> surprised
> > when I noticed they weren't using any rebar or heavy wire.
>
> It depends on what kind of stresses the concrete has to endure from use
> and
> the weather.
>
> My shop floor has the new, "high fiber" concrete and it's a great floor.
> It
> also has the heavy wire reinforcement, yet there are about 5 or 6 find
> cracks that run diagonally across each of the four corners. The thermal
> stress in the corners has caused it to crack. They are fine cracks though
> and would disappear for another season with a good coat of paint.
>
> However the shop has a "rat wall" around it that extends below the frost
> line. Were I to do it again I'd put in a complete seperate foundation and
> isolate the floor from the foundation with 1/2" bead board. The shop is
> heated with a gas fired IR tube heater and the floor reaches room
> temperature which can be 72F or higher when I have some resin lay-ups
> curing. That means on a cold night the temperature of that concrete goes
> from 72F to below zero in less than a foot.
>
> >From a temperature standpoint you could walk on that floor barefoot.
> Having
> a distinct dislike for picking metal splinters out of my feet I'll let
> some
> one else do that.
>
> I do need to put a couch, and easy chair out there. The computer, which
> is
> part of the *old* ham station "out there" has a large screen and built in
> TV
> tuner/recorder as does this one here in the ham shack.
>
> Roger Halstead (K8RI and ARRL 40 year Life Member)
> N833R - World's oldest Debonair CD-2
> www.rogerhalstead.com
>
> > The concrete man explained that the rebar wasn't necessary with the
> new
> > type concrete with the reinforcing fibers in it. He stated he would put
> > in the
> > rebar / wire if I wanted it, but it just be a extra expense. I
> explained
> > to
> > him that I had put in several pier type tower bases over the years and
> > had used
> > the rebar. His answer to me was he didn't think the rebar would be
> needed
> > with the new type concrete, maybe the heavy grid wire but not the
> rebar.
> > I
> > figure there is some merit to what he's telling me because he's been in
> > the
> > concrete business for over 20 years. Something to think about 73's
> > Harold
> > - K9ge
> > _______________________________________________
> >
> >
> >
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> >
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