摘   要：为了研究橡胶粉和纤维不同掺量协同作用对路用混凝土的抗折强度和延性等力学性能的影响，进行了22组试验，分别对基准混凝土、橡胶粉混凝土和橡胶粉纤维混凝土进行了抗压强度、抗折强度和劈裂强度试验。试验结果表明，橡胶粉-纤维可改善路用混凝土的韧性，对于60目橡胶粉+10mm纤维混凝土，橡胶粉掺量控制在6%以内，纤维掺量控制在0.5%以内为佳；对于60目橡胶粉+20mm纤维混凝土，橡胶掺量控制在2%以内，纤维掺量控制在0.5%以内为佳。

Abstract: In order to investigate the influences of the synergistic reaction between fiber and rubber powder on  flexural strength and extension of concrete used in subgrade, 22 groups test are conducted, which include compressive strength, flexural strength and splitting strength of standard concrete, rubber concrete and fiber-rubber concrete. The results show that in order to improve the toughness of fiber-rubber concrete, for 60 mesh rubber powder+10mm fiber concrete, the content of rubber should be controlled by less than 6%, and the content of fiber should be controlled by less than 0.5%; and for 60 mesh rubber powder+20mm fiber concrete, the appropriate content of rubber is less than 2% and the content of fiber is less than 0.5%.