Don Snider wrote:
> How about the quick-dry concrete used for fence posts? Can this be used for
> towers? My hamshack is on Chincoteague island with a water table about 18
> inches down. Most people use the quick dry concrete for general projects
> because it will dry in the water but is it strong enough for an antenna
> base? The only other option may be to put well taps in and pump the water
> our while the concrete drys.
>
Concrete will cure in water, as long as the water isn't washing it away.
The curing is a chemical reaction, after all, not an evaporation of
the water. They actually "pond" water on the top of big slabs to
improve the curing.
A bit of browsing at the cement.org website... they add more lime to
concrete being poured underwater, so it stiffens faster so it's not
diluted by the surrounding water.
Maybe "quick-dry" and "hydraulic" are the same basic thing, under
different names.
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