关键词: 水环境;地聚物混凝土;分形维数;毁伤评估

Abstract: A split Hopkinson pressure bar(SHPB)apparatus was adopted to investigate the behaviour of geopolymer concrete(GC)in water environment.And the damage effect was assessed based on fractal dimension through analysis of broken concrete.The results indicate that the fragment-size distribution of GC fragments statistically has fractal property subjected to impact loading both in water and dry environment.In water environment,WGC perform higher strain rate,impact strength and better property of energy absorption at same damage degree due to crack stopping effect of water.At the same time,there existed close connection between fractal dimension and the behaviour of GC under impact loading,which can be used to assess the damage effect effectively.

Key words: water environment;geopolymer concrete;fractal dimension;damage assessment