Evaluation of high-strength concrete for lunar applications: Mechanical behaviour under static and dynamic loads at cryogenic temperatures

作者：Ruizhe Shao, Chengqing Wu, Jun Li, Kaiyi Chi, Zizheng Yu · 发表于：Construction and Building Materials · 年份：2025 · DOI：10.1016/j.conbuildmat.2025.142966 · 被引用次数：5 · 研究领域：High-Velocity Impact and Material Behavior、Planetary Science and Exploration、Engineering and Material Science Research

Substantial advancements in human sciences have greatly accelerated the exploration of celestial bodies. The construction of lunar bases now faces unique and severe environmental challenges, requiring materials that ensure structural integrity and stability. This study examines the static and dynamic mechanical properties of an innovative cement-free lunar high-strength concrete (LHSC). The multi-physics coupling effects of the extreme temperatures (20 °C, −70 °C, and −170 °C) and varying strain rates (approximately 30–200 s −1 ) were considered to evaluate the dynamic responses of LHSC using a 100 mm-diameter impact apparatus. The findings indicated that the compressive strength of LHSC increased from 129.5 to 153.6 MPa as the temperature decreased, with dynamic strength rising up to 70.8% above static levels at −170 °C. The energy absorption capacity generally improved with strain rate but signally deteriorated under cryogenic conditions. Dynamic split-tensile strength showed a consistent linear increase, with strength-rate sensitivity peaking at −70 °C whereas slightly diminishing at −170 °C. The ice-induced stiffening contributed to heightened material brittleness, leading to abrupt fracture initiation. The dynamic increase factor (DIF) for both compression and split-tension was higher at lower temperatures, highlighting increased rate sensitivity under cryogenic conditions, with split-tensile DIF values exceeding those of compression across all temperatures. Computed tom...