Influence of Curing Regime on the Ductility of Ultra-High Performance FiberReinforced Concrete (UHPFRC)

摘要

Ultra-High Performance Fiber Reinforced Concrete (UHPFRC),rncharacterized by its outstanding mechanical and ductile performance, have receivedrnsignificant attention recently in the construction. In this paper, curing of UHPFRCrncubes and prisms at 20℃ and 90℃ has been investigated to quantify the differencesrnin both mechanical and ductile performance within the age of 91 days. The resultsrnshows that specimens cured at 20℃ gives approximately 20%, 10% and 15% lowerrnperformance in compressive strength, flexural strength and fracture energy thanrnspecimens cured at 90℃, respectively. However, the 20oC-cured specimens not onlyrnachieve above 120MPa, 20MPa and 18kJ/mm~2 in compressive strength, flexuralrnstrength and fracture energy, but also show advantage in maintaining flexuralrnresistance in the ductile deformation. The results of the research demonstrate thernfeasibility of in-situ concrete placement and construction of UHPFRC.