Posted by big jt on December 10, 2012 at 07:41:08 from (206.72.54.246):
In Reply to: Concrete in December posted by G1050 on December 10, 2012 at 06:43:22:
Going back to my AgMech 250 course from Iowa State I wouldn't even think of pouring concrete in December.
The first month is when over 90% of the curing process occurs. We tested three sets of cores over a month. One set was put under water, One allowed to air dry and one set was put in the freezer.
Don't remember the exact proportions but the difference in compressive strengths of these cores was significant. They were in the order listed above starting with the strongest to weekest. Unless you have a way to keep it from freezing for the first month I wouldn't even think about pouring this time of year.
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