When it's cold outside, placing, finishing, and curing concrete
calls for extra care. In cold weather, concrete sets up
more slowly, takes longer to finish, and gains strength more
slowly. Worst of all, there's a risk that the fresh concrete will
freeze — and if it does, the damage
done by ice formation can reduce its
final compressive strength by as much
as 50 percent.
To avoid the delays and quality
problems that cold weather can cause,
contractors have to be careful in site
preparation, concrete placement, and
protection of the concrete while it is
curing. Before you pour in cold weather, you should be sure
you're prepared for it.
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