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Posted by Rodo on December 23rd, 2000 12:00 PM
In reply to Pouring cement footings when temp is below 0 degrees by Dave L on December 21st, 2000 11:16 AM [Go to top of thread]

The American Concrete Institute has guidelines for "cold weather concreting". Your contractor should refer to this code. Calcium chloride is used to accelerate the set and development of strength of concrete. it offers advantages in cold-weather by speeding the set at low temperature and reducing the time that protection is necessary. Care must be taken on the amount to use as it can also increase drying shrinkage which may cause cracking.

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