Durability Characteristics of Precast Concrete Box Culverts

摘要

Based on examination of nine (9) wetcast and four (4) drycast box culverts, itwas concluded that the use of air-entrained concrete improves the freeze-thaw durability of wetcast box culverts; drycast box culverts that are produced using non-air-entrained concrete have unsatisfactory freeze-thaw durability; the addition of microsilica and GGBF to the concrete reduced chloride ion permeability in both wetcast and drycast concrete box culverts.