冲击荷载作用下玄武岩纤维增强地质聚合物混凝土的变形特性

DEFORMATION PROPERTY OF BASALT FIBER REINFORCED GEOPOLYMERIC CONCRETE UNDER IMPACT LOADING

采用φ100mm分离式霍普金森压杆(split Hopkinson pressure bar,SHPB)试验装置,研究了不同基体强度的玄武岩纤维增强地质聚合物混凝土(basalt fiber reinforced geopolymeric concrete,BFRGC)在冲击荷载作用下的变形特性。SHPB结果表明:BFRGC的临界应变具有显著的应变率相关性;随着基体强度的增加,BFRGC在冲击荷载作用下的变形能力降低;当玄武岩纤维的体积掺量为0.2%时,玄武岩纤维对地质聚合物混凝土的变形能力的改善效果最佳。

The deformation property of basalt fiber reinforced geopolymeric concrete （BFRGC） with different matrix strength under impact loading was studied through using 100-mm-diameter split Hopkinson pressure bar（SHPB） apparatus. The results show that the critical compressive strain takes on obvious strain rate dependency. Deformation capability of BFRGC lowers with the matrix strength increasing. For the impact deformation capability of BFRGC, the optimum volume fraction of basalt fiber is 0.2%.