Spaceman is a wealth of knowledge and has been super helpful to me.
His experience regarding freezing weather may not apply to you since you, like me, too, live in an area that hard freezes in the winter. If you do a pour in December or January (or even some years, in November), it is possible that it will not completely thaw until sometime in early June. Where Spaceman lives, it is more likely that during the coldest weeks of winter the pour would thaw and refreeze daily for a week or two before curing completely.
Where I am, a bucket of water left outdoors will freeze in November and will continue to have a solid block of ice in the bucket until very late spring. The block may melt a bit some days, enough that it begins to float on an inch or two of water, but it will refreeze as soon as the thermometer drops below 32.
If you have tons of forms, you can probably pour bricks and just leave them frozen and have tons of bricks come summer. If you are pouring courses into slip-forms for a wall on a building, I don't think you can go beyond your first course until the weather warms.
Spaceman may have experience with some hard-freeze locations and want to add to this or correct me on this. I'm a novice.
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