关键词: 活性粉末混凝土;高温;抗压强度;钢纤维;聚丙烯纤维

Abstract: Hybrid fiber reactive powder concrete (RPC) for different temperature levels and burn through built-in thermocouple (specimens center reach the target temperature) of compressive strength were tested, dosage of fiber and polypropylene to the influence of the compressive strength of RPC was studied.The results show that the compressive strength of RPC concrete as the rise of temperature is in general on the decline,steel fiber can improve the concrete compressive strength of RPC, and polypropylene fiber can improve the RPC after high temperature performance and suppress blowout, hybrid fiber can be complementary advantages.Based on the experimental results ,suggest while the steel fiber volume content is 2％, mixed with polypropylene content volume and 0, 0.1％ and 0.2％, the relationship between the average compressive strength of RPC and the temperature of fire.

Key words: reactive powder concrete;high temperature;compressive strength;steel fiber;polypropylene fiber