玄武岩纤维改性沥青及其混合料力学性能研究

Research on Mechanical Properties of Basalt Fibre Modified Asphalt and Its Mixture

文中分析了冻融循环作用下玄武岩纤维对沥青抗裂性能和水稳定性能的改善效果、沥青混合料力学性能的衰减规律;研究了冻融循环作用下玄武岩改性沥青与基质沥青极限张力的变化规律以及力学性能;同时采用浸水马歇尔、冻融劈裂等方法,对其水稳定性进行了研究。研究发现,沥青中加入玄武岩纤维后,其抗拉张力得到了显著提高,抗压、低温抗裂、水稳性能均得到了明显改善。

The influence of basalt fiber on the anti-asphalt cracking resistance of the freezing and thawing cycle,as well as the law of attenuation of its mechanical properties of asphalt mixture,are explored in this work.The freeze-thaw cycle under the action of basalt modified asphalt and matrix asphalt limit tension change rulewas studied with the helpof MTS universal testing machine,uniaxail compression test andlow-temperature splitting test,to investigate its water stability performance,researchers used a water-immersed Marshall test as well as a freezing and thawing splitting test.The results revealthat,when compared to matrix asphalt,basalt fibre insertion greatly enhances the tensile characteristics of asphalt,as well as the compressive strength,low-temperature cracking resistance,and water stability of asphalt mixes.