North Carolina · answered by Verika · verified against sources
What air content is required for concrete on North Carolina DOT projects?
For North Carolina DOT projects, air content in concrete must be 6.0% ± 1.5% (general concrete) [1] or 5.0% ± 1.5% (pavement concrete) [5]. Use AASHTO T 121, T 152, or T 196 for testing; Chace Indicator may be used with correlation [1,5].
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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.