[TowerTalk] RE: Erecting tower

[Mike Warnock]

>From a guy with a hundred years supervising concrete work, this guy is dead
on.  EXACTLY as he said.
----- Original Message ----- 
From: "Dino Darling" <k6rix at earthlink.net>
To: <TowerTalk at contesting.com>
Sent: Wednesday, December 03, 2003 9:16 PM
Subject: Re: [TowerTalk] RE: Erecting tower


> For those who may not know....
>
> I wanted to point out what vibrating concrete does.  It PECULATES the air
> pockets or VOIDS out of the pour (see below).  Voids will cause weak spots
> in the base!  If you OVER-VIBRATE the pour, the aggregate (rocks) will
sink
> to the bottom of the pour and you lose the STRENGTH those rocks
> provide.  Don't pour the entire base and then vibrate.  Vibrate as you
> go!  It tough for air to work its way up 6' of concrete if its thick (low
> slump).  When you see no more bubbles coming up, STOP!  Plunge the
vibrator
> in and out of the pour as you go.
>
> Also, don't let the head come out of the pour or you'll have concrete
> splashed EVERYWHERE!  Its like a mixer coming out of cake mix!
>
> >Remember to have a crew member move around the concrete as it's being
> >poured or rent an electric vibrator to remove the air pockets that may
> >develop as the concrete tries to flow around the tower braces.  Don't
over
> >vibrate it though.
>
> Dino...k6rix at earthlink.net
>
>
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>
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>
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