【Key words】 ultra-high performance cementitious composites; split Hopkinson pressure bar; steel fiber volume fraction; strain rate; spalling
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研究了水灰比（W/ C）、砂灰比（S/ C）、钢纤维掺量对水泥基复合材料性能的影响；
The effect of water binder ratio (W/C), slag binder ratio (S/C) as well as the adding quantity of steel fiber on cement based composite was studied;
试验表明，钢纤维掺量对高强混凝土单轴受压的应力峰值、峰值应变及韧性产生了不同程度的影响；
The results showed that the peak-stress, peak-strain and toughness of high-strength concrete under uniaxial compression are affected in different extents by the content of steel fiber;
以几种不同类型钢纤维增强混凝土的抗压性能试验研究为基础，讨论了钢纤维掺量、分布形式以及钢纤维类型对混凝土抗压性能的影响。
Concrete reinforced with different kinds of steel fibers is studied experimentally. The effect of content, orientation, and type of steel fibers on concrete is discussed.
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