Considering the low-permeability of reactive powder concrete (RPC) and the influence of pressurized liquid on crack development, this paper studies the mechanical properties of sealed and unsealed prismatic RPC samples under different confining pressures. It is determined that the stress-strain relations of sealed and unsealed RPC samples are almost consistent before the stress reaches its proportional limit, but the pressurized oil greatly accelerates the failure of the unsealed sample after this point. The strength loss of unsealed samples increases with an increase in the confining pressure. The failure patterns of the sealed RPC samples change with the confining pressure, but those of the unsealed samples are almost same. The unsealed samples are split by a vertical crack under every confining pressure. Additionally, it is determined that the crack development leads to a difference in the lateral strains in the perpendicular directions for sealed prismatic samples, and the difference between the lateral strains at the peak stress in different directions increases linearly as the confining pressure increases. In contrast, for unsealed samples the lateral strains at the peak stress in the perpendicular directions are close.

考虑到反应性粉末混凝土（RPC）的低渗透性和加压液体对裂缝发展的影响，本文研究了密封和未密封的棱柱形RPC样品在不同围压下的力学性能。可以确定，密封的和未密封的RPC样品在应力达到比例极限之前的应力-应变关系几乎是一致的，但是加压油在此点之后大大加速了未密封的样品的破坏。未密封样品的强度损失随围压的增加而增加。密封的RPC样品的失效模式随围压而变化，但未密封的样品的失效模式几乎相同。在每个围压下，未密封的样品都会被垂直裂缝裂开。另外，可以确定，裂纹的发展导致密封的棱柱形样品在垂直方向上的横向应变差异，并且随着围压的增加，在不同方向上的峰值应力处的横向应变之间的差异线性增加。相反，对于未密封的样品，在垂直方向上的峰值应力处的横向应变是接近的。