It cures more slowly in the damp ground which is good, wait the recommended
month.
Mike, K6BR
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Dan Bookwalter
Sent: Wednesday, October 27, 2010 5:18 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Concrete Strength
I seem to recall from about 8 years ago that concrete is up to 75% of its
strength in 72 hours or something like that. UST calls out 2500 PSI concrete
after 28 days , so that i don't have to wait a month i was going to use 4000
PSI
concrete and put the tower on it after a week or so , thoughts ?
Dan N8DCJ
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