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Re: Concrete Freezing

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In a message dated 12/4/01 3:16:33 PM, dang(--nospam--at) writes:

<< Anybody know of any good references that address

the effects of freezing on concrete?  I've got a contractor

that placed a foundation wall, and didn't adequately protect

it from the cold weather.

Dan Goodrich, P.E.


The issue is how much strength did the concrete have when it froze.  Fully 
cured concrete can easily sustain temperatures well below freezing.  Concrete 
is exothermic, so generates enough heat, when freshly placed, to prevent 
freezing at temperatures close to 32° F.  I believe that ACI 301 gives 
guidance on this issue.  I have also heard about research that the Army Corps 
of Engineers Cold Regions Lab in Hanover, NH is doing that indicates that 
concrete that cures at low temperatures (near freezing) actually develops 
better long term properties than concrete cured at higher temperatures 80° F. 

Regardless of the above, if it froze before it achieved adequate initial 
strength, it may  be just so much mush.

Alan Fisher, PE

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