> It should be in one pour so that the base is totally
> bonded together. If
> the bottom pour has 'gone off' and hardened, you wind up
> with two separate
> layers.
>
> Sometimes there are two pours if you have to have two
> trucks worth of
> concrete but they are poured consecutively with little or
> no time delay.
So how much delay is tolerable? It takes me 20-45 minutes
to drive back to the ready mix place 1 1/2 miles away,
get reloaded, and drive back. After 45 minutes, I can
at least poke a hole in the previously poured cement
with a stick. Is this good enough? Is it helpful to
sprinkle a little water on the top to slow down the
curing before the next pour? Always wondered about this
stuff. It is sn't covered in any concrete books I've read :-)
Rick Karlquist N6RK
richard@karlquist.com
www.n6rk.com
www.karlquist.com
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