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One of the latest advancements in concrete technology is ultra-high-performance concrete (UHPC), a fiber-reinforced, densely packed material that exhibits increased mechanical performance and superior durability compared with normal- and high-strength concretes. UHPC has great potential to be used in the bridge market in the United States. However, to gain acceptance by designers, contractors, precasters, and owners, this material needs to be tested according to ASTM International and AASHTO standards, and new practices must be developed. The variability in performance that is based on new challenges of mixing and curing must also be considered. The effects of curing regimes and specimen age on the strength and durability properties of a fiber-reinforced UHPC was investigated. Regardless of when the thermal treatment was applied, UHPC consistently attained compressive stresses above 30 ksi …