Thanks. Yes, professional is doing the work. I was just concerned about the
strength of the concrete. Contractor assured me it is stronger, 4000 psi. The
tower is not going anywhere, specs ask for 2500 minimum :)
Thanks everyone for the quick responses.
Andreas
Sent from my Windows Phone
________________________________
From: George Dubovsky
Sent: 7/12/2012 4:27 PM
To: Andreas Hofmann
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Aggregate concrete for tower foundation?
All concrete has aggregate composition - gravel, sand and concrete. The gravel
can be crushed stone or rounded stone, and the "aggregate finish" refers to how
the top surface is finished. If you want exposed aggregate, you would want to
pick a stone that's attractive when exposed. Usually, you pour the concrete,
get the voids out (vibrator, etc), and then finish the top surface as a final
step, whether its hard troweling for a slick finish, brush finish (broom
finish) for a rougher finish, or you "wash" the top surface to expose the
gravel for the decorative aggregate finish. The strength of the concrete is
based on the ratio of the ingredients (and that's part of the initial order),
not on the finish of the top surface.
Having done all three finshes (and I'm a rank amateur at all of them), the
aggregate finish is best left to the real pros if a large area is involved.
73,
geo - n4ua
On Thu, Jul 12, 2012 at 7:05 PM, Andreas Hofmann
<Andreas.Hofmann@microsoft.com<mailto:Andreas.Hofmann@microsoft.com>> wrote:
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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