The polypropylene fiber volume content was 0.3%,different steel fiber content on the axis of reac-tive powder concrete after high temperature tensile strength, compressive strength, flexural strength, tension and compression ratio,the influence of the folding ratio and its variation law with temperature.The results show that the polypropylene fiber can effectively inhibit the bursting and improve the performance of the active powder.Mixed with polypropylene fiber and steel fiber can improve the mechanical properties of hybrid fiber reactive powder con -crete after high temperature,500℃before damage rate is smaller,damage rate after 500℃;mixed fiber with 2%fiber is mixed fiber active powder concrete high temperature,the pull ratio of the pressure ratio,the pressure ratio increases more,the hybrid fiber can complement each other.%研究了聚丙烯纤维体积掺量为0.3%时,不同钢纤维掺量对活性粉末混凝土高温后轴心抗拉强度、抗压强度、抗折强度、拉压比、折压比的影响及其随温度的变化规律.结果表明:聚丙烯纤维能够有效抑制爆裂、改善活性粉末高温后的性能;混掺聚丙烯纤维和钢纤维能够提高高温后混杂纤维活性粉末混凝土力学性能,500 ℃之前损伤率较小, 500 ℃之后损伤率较大;混掺2%钢纤维的混杂纤维活性粉末混凝土高温后的拉压比、折压比提高较多,混杂纤维可以优势互补.
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