Park Jong-Sup, Kim Young Jin, Cho Jeong-Rae, Jeon Se-Jin
Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-si, Gyeonggi-do 411-712, Korea.
Department of Civil Systems Engineering, Ajou Univeristy, Suwon-si, Gyeonggi-do 443-749, Korea.
Materials (Basel). 2015 Aug 24;8(8):5537-5553. doi: 10.3390/ma8085261.
The strength of Ultra-High Performance Concrete (UHPC) can be sensitively affected by the curing method used. However, in contrast to the precast plant production of UHPC where a standard high-temperature steam curing is available, an optimum curing condition is rarely realized with cast-in-place UHPC. Therefore, the trend of the compressive strength development of UHPC was experimentally investigated in this study, with a focus on early-age strength by assuming the various curing conditions anticipated on site. Concrete specimens were cured under different conditions with variables including curing temperature, delay time before the initiation of curing, duration of curing, and moisture condition. Several conditions for curing are proposed that are required when the cast-in-place UHPC should gain a specified strength at an early age. It is expected that the practical use of UHPC on construction sites can be expedited through this study.
超高性能混凝土（UHPC）的强度会受到所采用养护方法的显著影响。然而，与预制厂生产UHPC时可采用标准高温蒸汽养护不同，现场浇筑的UHPC很少能实现最佳养护条件。因此，本研究通过实验研究了UHPC抗压强度发展趋势，重点关注早期强度，假定了现场可能出现的各种养护条件。混凝土试件在不同条件下养护，变量包括养护温度、开始养护前的延迟时间、养护持续时间和湿度条件。提出了现场浇筑UHPC在早期达到规定强度时所需的几种养护条件。预计通过本研究可加快UHPC在建筑工地的实际应用。
