Oklahoma · answered by Verika · verified against sources
What are the rules for placing concrete in cold weather on Oklahoma DOT projects?
Cold weather is defined as ambient air temperature <35°F [2°C] measured 5 ft [1.5 m] above ground in shade. Remove snow/ice/frost from surfaces contacting concrete; ensure contact surfaces ≥35°F [2°C]. Use heaters gradually to avoid surface temps >90°F [32°C] before setting; vent exhaust gases outside. Protect concrete for ≥7 days so surface temp doesn’t drop below 50°F [10°C]; extend to 10 days if fly ash/slag/silica fume are used. Avoid direct flame heating of aggregates or direct steam for fine aggregate; no salts for freezing prevention.
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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.