摘要
以矿渣与粉煤灰为原材料,制备地质聚合物混凝土(geopolymeric concrete,GC)。采用Φ100 mm分离式霍普金森压杆(split Hopkinson pressure bar,SHPB)装置研究了不同强度等级的GC的冲击力学性能,包括抗压强度、变形及能量吸收特性的应变率效应问题。结果表明:GC的冲击力学性能呈现出显著的应变率相关性,强度的应变率敏感值为42.7 s—1;随着强度等级的提高,GC的变形能力反而降低。GC属于准脆性材料,相对于单一的强度或变形特性,GC的能量吸收特性更值得关注。
The industrial wastes,slag and fly ash,were used to produce geopolymeric concrete(GC).The impact mechanical properties of GC,including compressive strength,deformation and energy absorption capacities,were studied using a 100-mm-diameter split Hopkinson pressure bar(SHPB) apparatus.The experimental results showed that the impact properties of GC exhibit strong strain rate dependency,and the transition point from low sensitivity to high sensitivity occurs at strain rate 42.7 s-1.The critical strain decreases with increase in dynamic compressive strength.GC is a type of quasi-brittle material.Its energy absorption property should be paid more attention to than its strength or deformation capacity.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第1期46-50,共5页
Journal of Vibration and Shock
基金
空军工程大学工程学院优秀博士学位论文创新基金(BC07002)
关键词
地质聚合物混凝土
分离式霍普金森压杆
冲击力学性能
应变率效应
geopolymeric concrete(GC)
split Hopkinson pressure bar(SHPB)
impact mechanical property
strain rate effect