The mechanical properties of foam concrete with sand at different low temperatures and different strain rates were studied. Foam concrete with sand at low temperatures (−10, −20, and −30°C) were tested using a split Hopkinson pressure bar (SHPB) apparatus with different impact pressures (0.15, 0.20, 0.25, 0.30, and 0.35 MPa). The experimental results show that the porosity of sand containing foam concrete with a density of 1,000, 1,200, 1,400 kg/m³ decreases with increasing density. In the same strain rate range, the lower the temperature of the same density foam concrete with sand, the greater the ultimate compressive strength. The change in strength was caused by the presence of pore water or ice in the foam concrete with sand in low-temperature conditions. The dynamic compressive strength of foam concrete with sand decreases with increasing strain rate. The macroscopic failure of foam concrete was closely related to the energy absorption and dependent on the rate. The total dissipated energy of the low-temperature foam concrete with sand increased linearly as the temperature decreased. The research results provide the low-temperature mechanical properties of foam concrete with sand, which provides a reference for the application of foam concrete with sand.

研究了不同低温和不同应变率下含砂泡沫混凝土的力学性能。使用具有不同冲击压力（0.15、0.20、0.25、0.30 和 0.35 MPa）的分体式霍普金森压力棒 (SHPB) 设备对低温（-10、-20 和 -30°C）下的含砂泡沫混凝土进行了测试。试验结果表明，密度为1000、1200、1400 kg/m ³的含砂泡沫混凝土的孔隙率随着密度的增加而减少。在相同应变率范围内，同密度含砂泡沫混凝土的温度越低，其极限抗压强度越大。强度的变化是由于低温条件下含砂泡沫混凝土中存在孔隙水或冰引起的。加砂泡沫混凝土的动态抗压强度随着应变速率的增加而降低。泡沫混凝土的宏观破坏与能量吸收密切相关，并依赖于速率。含砂低温泡沫混凝土的总耗散能随着温度的降低而线性增加。研究结果提供了加砂泡沫混凝土的低温力学性能，为加砂泡沫混凝土的应用提供了参考。