Grin,
Too true Dino!
I did manage to pour 4 trucks full of concrete last year. All with
microfiber in it.
What I was told was that it would do nothing to stop the cracking. This has
proven to be quite true. My 25x35 slab for a house addition is cracked all
over. Pouring in 100* weather is bad. Not leaving a sprinkler on it for a
week is worse!
Next time I'll try the "more concrete" idea.
What the fiber did do (and was claimed by the concrete guys) was to hold the
concrete together. This tendency was quite clear with little chunks that
were left on tools or forms. Hunks would come off but still be stuck
together nicely. It was actually quite impressive.
We did have a bit more trouble getting the finishing done as the fiber would
stick to the tools. Once the concrete set up a bit though, that problem
mostly went away and we were able to finish it just fine. And power
troweling worked just like normal. One note I'd make though, when you want
a nice smooth floor (like in a house) don't be afraid to run that power
trowel about twice as long as you'd think you'd have to. We should have hit
the floor 2 or 3 more times. I guess I'll have a nice surface for flooring
to stick to though :-).
laters,
Marlon
(509) 982-2181 Equipment sales
(408) 907-6910 (Vonage) Consulting services
42846865 (icq) And I run my own wisp!
64.146.146.12 (net meeting)
www.odessaoffice.com/wireless
www.odessaoffice.com/marlon/cam
----- Original Message -----
From: "Dino Darling" <dino@k6rix.com>
To: "K8RI on Tower talk" <k8ri-tower@charter.net>
Cc: <towertalk@contesting.com>
Sent: Sunday, June 18, 2006 10:07 PM
Subject: Re: [TowerTalk] Vibrating Concrete...
> Roger asked;
>> What are your recomendations for vibrating "high fiber" concrete.
>
> Hey Roger, I'm not a professional concrete guy, but I play one on TV,
> AND slept at a Holiday Inn Express last night! :-) To answer you
> question, "Add more water!"
>
> I sold concrete tools for a few years and did all the demos. According
> to the concrete guys, they saw no advantage to the fiber and it made
> everything "furry". They still got cracks, etc. The old timers would
> say, "Use more concrete if you want more strength."...or something to
> that affect.
>
> To be fair, the "engineers" state that FIBER is the best thing for
> concrete and makes a world of difference! I have yet to be on a pour
> where an engineer was ankle high in the mud or riding on the concrete
> trowel machines with me. YMMV!
>
> Dino - K6RIX
> dino@k6rix.com
>
> _______________________________________________
>
>
>
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