利用超声测试技术，进行了８ 组共计４８ 个普通砼及钢纤维砼试件的力学性能试验．通过对试件裂缝的出现、发展及试件破坏过程的测试，获得了超声波在普通砼和钢纤维砼中传播的各种声学参数．利用所测得的超声波穿过砼试件的传播时间及首波振幅衰减量，分析讨论了砼强度和钢纤维含量对声学参数的影响，并在此基础上对普通砼及钢纤维砼的力学性能进行了综合分析．结果表明，钢纤维砼的抗裂、抗拉等力学性能明显优于普通砼． Using ultrasonic testing technology, a total of 48 groups of eight ordinary concrete and steel fiber reinforced concrete specimens mechanical properties test. Through the appearance of cracks in the specimen, the development of the specimen and the test of the destruction process, various acoustic parameters of ultrasonic transmission in ordinary concrete and steel fiber reinforced concrete were obtained. The influence of the concrete strength and steel fiber content on the acoustic parameters was analyzed and discussed based on the propagation time of the ultrasonic wave passing through the concrete specimen and the amplitude attenuation of the first wave. On this basis, the mechanical properties of ordinary concrete and steel fiber reinforced concrete Performance of a comprehensive analysis. The results show that the mechanical properties of steel fiber reinforced concrete such as cracking resistance and tensile strength are obviously better than ordinary concrete.