[TowerTalk] Vibrator for 2x2x4 hole?

Roger (K8RI) K8RI-on-TowerTalk at tm.net
Thu Aug 16 15:37:46 EDT 2007




> Folks - for a 2x2x4' Rohn 25 base concrete foundation, do I need to
> use a concrete vibrator during the concrete pour?

A vibrator is to get rid of any air pockets in the pour.
The need for a vibrator depends on how dry the mix is and how it's poured.
Often the new, high strength concrete is poured with a minumum of water 
which even requires a shaker to get the stuff down the chute and there a 
vibrator is essential. With a more conventional pour I just use a plain old 
fashioned garden variety hoe.  You have to work fast, but it doesn't take 
much.   Contrary to popular belief you are not tamping, but only working out 
the air pockets. In small holes I've used no more than a broom handle with 
*wet* concrete.

73 and good luck,

Roger (K8RI)
>
>  dana
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