Environmental factors (e.g., wind) may deteriorate the volume stability of ultrahigh-performance concrete (UHPC), which undermines structural safety. Therefore, in this study, the effects of wind speeds (WSs) on the early shrinkage (e.g., autogenous/drying shrinkage) of UHPC were investigated, and the shrinkage behaviors were further explained from the evaporation and pore structure distributions of UHPC. The results highlighted the effects of silica fume (SF) on the early shrinkage of UHPC under windy conditions, however, water evaporation should be combined with pore size distributions to obtain critical pores of UHPC. At the same time, based on the critical pore diameter, different early drying shrinkage developments were observed in UHPC under normal drying conditions and at a WS of 0.25 m/s. Further, in some cases, drying shrinkage may play a more important role that governs the early total shrinkage of UHPC than autogenous shrinkage, which complements current theories of shrinkage.

环境因素（例如，风）可能会降低超高性能混凝土（UHPC）的体积稳定性，从而破坏结构安全。因此，在本研究中，研究了风速（WSs）对UHPC早期收缩（例如，自生/干燥收缩）的影响，并从UHPC的蒸发和孔隙结构分布进一步解释了收缩行为。结果突出了硅粉（SF）对大风条件下UHPC早期收缩的影响，然而，应将水分蒸发与孔径分布相结合以获得UHPC的临界孔。同时，根据临界孔径，不同的早期干燥收缩率在正常干燥条件和 0.25 m/s 的 WS 下，在 UHPC 中观察到了发展。此外，在某些情况下，干燥收缩在控制 UHPC 的早期总收缩方面可能比自收缩发挥更重要的作用，这补充了当前的收缩理论。