[TowerTalk] FW: Concrete Pad for U.S. Tower TX-472
Patrick Greenlee
patrick_g at windstream.net
Sat Jul 25 21:16:00 EDT 2015
On 7/25/2015 4:22 PM, Roger (K8RI) on TT wrote:
> Don't rush! I'd wait the full 28 days.
>
> , no stress on the concrete for 6 weeks after the pour.
>
> Even lowering the tower straight down, that is still a fair
> load/stress for concrete not fully cured, or at least almost cured.
> The last few % takes a long time.
>
> They stressed that with concrete, let it cure properly and don't rush!
>
> 73, Roger (K8RI)
The % of cure asymptotically approaches its final value (gets closer and
closer at a slowing rate of approach) so that theoretically it never
quite finishes curing but gets close enough for most practical purposes
(90% of the final strength) in 28 days if the temps aren't extreme (hot
or cold.) Keeping the pour wet, especially the first several days is a
good tactic.
Patrick
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