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On a 9°F day in December 2014, Connecticut concrete contractor Dennis Purinton was pouring a slab on grade. It was the kind of work Purinton had done often enough before. But this time, he had a small audience of experts and supplier representatives from around the concrete industry—some of them, like Purinton himself, members of the consensus committee that creates ACI 306, the American Concrete Institute’s Guide to Cold Weather Concrete.
Purinton’s goal was to demonstrate for his audience—and, by extension, for the full ACI 306 committee—something that he already knew from decades of experience working in New England conditions: “Concrete performs very, very well in cold weather.”