steel fiber volume fraction
【Key words】 ultra-high performance cementitious composites; split Hopkinson pressure bar; steel fiber volume fraction; strain rate; spalling
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When the steel fiber volume fraction is higher than 3.5%, its compressive strength decreases, the splitting tensile strength increases slightly, however, its flexural strength increases obviously.
当钢纤维体积含量超过3.5%后，活性粉末混凝土抗压强度下降，劈拉强度略有提高，而抗折强度仍有明显的提高。
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