New Hampshire · answered by Verika · verified against sources
What air content is required for concrete on New Hampshire DOT projects?
Air content for NH DOT concrete classes ranges from 3% to 9% (Class B: 3–6%, Class A: 4–7%, Class AA: 5–9%, Class AAA: 5–9%). Class F requires 15–25% air content.
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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.