[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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