摘要
Abstract
To address the frequent cracking of asphalt pavements in soft soil areas due to low foundation bearing capacity and susceptibility to environmental influences,this study uses styrene-butadiene-styrene block copolymer(SBS)modified asphalt as the base material,with a composite incorporation of graphene oxide(GO)and ba-salt fiber(BF)to prepare SMA-13 mixtures.The crack resistance of the mixtures was evaluated using the semi-circular bending(SCB)test system.The results show that both GO and BF individually improve the crack resistance of the mixtures,with BF having a more significant effect on fracture toughness,while GO is particularly effective in enhancing long-term stiffness.When the GO content is 2.5％of the asphalt mass and the BF content is 0.4％of the total mixture mass,a significant synergistic effect is observed,with fracture en-ergy,J-integral,and long-term modulus increasing by 43.8％,123.9％,and 248.2％respectively compared to the benchmark group,greatly enhancing the material's ability to resist crack initiation and propagation.关键词
氧化石墨烯/玄武岩纤维/沥青路面/抗裂性能/软基路段Key words
graphene oxide/basalt fiber/asphalt pavements/crack resistance/soft subgrades分类
交通工程
