New Jersey · answered by Verika · verified against sources
What slump is allowed for structural concrete on New Jersey highway projects?
For structural concrete on New Jersey highway projects, slump requirements vary by item: Class A (e.g., decks, sidewalks, culverts) requires 3 ± 1 inches [1]; Class B (e.g., footings, abutments, retaining walls) requires 3 ± 1 inches [1]; drilled shafts require 7 ± 1 inches (or 8 ± 1 inches if placed under drilling fluid) [1]. For roadway concrete (e.g., inlets, manholes, curbs), Class B requires 3 ± 1 inches [5]. Type F/G admixtures adjust slump to 6 ± 2 inches [1,5].
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