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RE: Cold Weather and Concrete

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All of the provisions are contained in ACI 306R.  Generally when concrete
freezes prior to hydration, it is not worth much.  You can tell by the thud
a hammer gives when you tap it.  It will never set properly, and should be
replaced.  Monitoring the temperature throughout the operation is very

Harold Sprague
The Neenan Company

> ----------
> From: 	terrence turner[SMTP:tnturner(--nospam--at)]
> Reply To: 	seaint(--nospam--at)
> Sent: 	Thursday, December 24, 1998 4:15 PM
> To: 	seaint(--nospam--at)
> Subject: 	Cold Weather and Concrete
> Hi,
> My question has to deal with the pouring of a structural slabs in very
> cold
> weather.  What type of provisions should be taken before pouring?  Also,
> if
> the slab does freeze, as it happened recently to us on a job in MI, what
> type of remedial measures are available short of chipping out the slab?
> Thanks in advance for any help,
> Jon Turner