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本文利用直径100 mm的分离式霍普金森压杆试验系统,研究了不同应变率下长期水环境作用对地聚物混凝土动态力学性能的影响。结果表明:GC试件的动压强度、动压韧性随应变率增大而增大,表现出明显的应变率效应;水环境下,GC试件静压强度低于干燥试件,随应变率增大,试件动压强度提升幅度较大,动压强度高于干燥试件。水环境提升了GC试件动压强度的率敏感性。同时,GC试件动压韧性受水环境影响较小,但试件的动弹性模量大于干燥试件,变形能力降低。
In this paper, the split Hopkinson pressure bar test system with a diameter of 100 mm was used to study the effect of long-term water environment on the dynamic mechanical properties of geopolymer concrete under different strain rates. The results show that the dynamic compressive strength and dynamic toughness of GC specimens increase with the increase of strain rate, which shows obvious strain rate effect. Under water environment, the static pressure of GC specimens is lower than that of dry specimens. With the strain rate Increase the dynamic pressure strength of the specimen to enhance the larger, dynamic pressure intensity higher than the dry specimen. Water environment enhances the sensitivity of dynamic stress intensity of GC specimens. At the same time, the dynamic toughness of GC specimen is less affected by water environment, but the dynamic elastic modulus of specimen is larger than that of dry specimen, and the deformation ability is reduced.