地质聚合物混凝土的变形特性研究

Study on Deformation Property of Geopolymeric Concrete

采用Φ100mm分离式霍普金森压杆(SHPB)试验装置,以峰值应变和极限应变为指标,研究了地质聚合物混凝土(GC)和普通硅酸盐混凝土(PC)在冲击荷载作用下的变形特性。结果表明:冲击荷载下,GC具有较强的变形性能;GC和PC的峰值应变和极限应变具有明显的应变率相关性,随应变率的增加而增加;和PC相比,GC在开始破坏前产生的变形较大,完全破坏时产生的变形较小。

Taking peak strain and critical strain as the index, the deformation property of geopolymeric concrete under impact loading were studied using a 100 mm-diameter split Hopkinson pressure bar（SHPB） apparatus. The results show that the deformation property of the geopolymeric concrete is excellent. Furthermore, the deformation property of the geopolymeric concrete and plain concrete increases with the average strain rate for the strain rate effect, which takes on obvious strain rate dependency. Compared with the plain concrete, the deformation property of the geopolymeric concrete is larger before its damage, while the deformation is smaller after its damage.