Exposed aggregate is usually just a surface layer of the pretty finish
rocks, applied at just the right time after the surface of the concrete has
started to set. Wait too long and the rock doesn't hold. Wait too little
and the rock sinks into the concrete and disappears. That top 1/4" of
aggregarate shouldn't affect the overall foundation strength.
73,
Steve
N6SJ
----- Original Message -----
From: "Andreas Hofmann" <Andreas.Hofmann@microsoft.com>
To: <towertalk@contesting.com>
Sent: Thursday, July 12, 2012 4:05 PM
Subject: [TowerTalk] Aggregate concrete for tower foundation?
>I got a tower foundation planned and dug up. Plan was to use normal
>concrete (3500psi) that I would at the same time use for a broom-finish
>patio at the same time. Now wife things she would like aggregate instead.
>
> Can I use aggregate concrete for a tower foundation? Will it be strong
> enough?
>
> Thanks
> Andreas, KU7T
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