Maine · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Maine DOT projects?
Concrete placement in cold weather on Maine DOT projects requires: (1) No placement against frozen surfaces; remove frost/ice/snow from contact areas [1]. (2) Discontinue mixing/placing if atmospheric temp is below 40°F (shade) and dropping; resume only if temp is ≥35°F (shade) and rising [1]. (3) If authorized for lower temps, heat water to ≤180°F; if aggregate or water >120°F, combine first before adding cement [1]. (4) If temp <25°F, heat aggregate; no frozen materials allowed [1]. (5) Minimum concrete temp as placed per Table 2 (e.g., 60°F for <12″ forms, 40°F for >72″ forms) [1]. (6) No salt/chlorides added [1]. (7) Protect concrete from frost/overheating; remove/replace damaged concrete at contractor’s expense [1].
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Verika provides information with citations to help you find and understand the rules that apply to your work. It is not a substitute for professional engineering or legal judgment. Answer generated 2026-08-28; always confirm against the cited source for your project.