玄武岩纤维直径对其沥青混合料性能的影响  

Influence of basalt fiber diameter on the performance of its asphalt mixture

作　　者：方雪飞 寇长江[1,2] 陈子恺 肖鹏 康爱红[1,2] FANG Xuefei;KOU Changjiang;CHEN Zikai;XIAO Peng;KANG Aihong(School of Building Science and Engineering,Yangzhou University,Yangzhou,Jiangsu 225127,China;Jiangsu Province Basalt Fiber Composite Building Materials Engineering Research Center,Yangzhou,Jiangsu 225127,China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]江苏省玄武岩纤维复合建筑材料工程研究中心,江苏扬州225127

出　　处：《中国科技论文》2024年第4期420-426,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(52178439);江苏省大学生创新创业训练计划项目(202211117148Y);江苏高校“青蓝工程”优秀青年骨干教师项目(YZU2022);江苏省科协青年科技人才托举工程项目(2021090);扬州大学高端人才支持计划项目(GDRC2022)。

摘　　要：为研究玄武岩纤维直径对其沥青混合料性能的影响,设计制备掺有7、16、25μm这3种直径玄武岩纤维的AC-13沥青混合料,采用车辙试验、单轴贯入试验、低温小梁试验、浸水马歇尔试验及冻融劈裂试验测试其路用性能,通过理想开裂试验、动态模量试验测试其力学性能。结果表明:玄武岩纤维直径对沥青混合料各项性能指标的改善效果影响较大,沥青混合料的最佳油石比随着玄武岩纤维直径的减小而略有升高;由于相同纤维掺量和纤维长度条件下,纤维直径越小,其根数越多,在沥青混合料中形成的筋体网络越丰富,故7μm直径玄武岩纤维对沥青混合料的高低频动态模量、中低温抗裂性能以及高温抗变形能力改善效果最为显著。研究结论可为沥青混合料用玄武岩纤维的精细化设计提供参考。In order to study the influence of diameter on the performance of basalt fiber-asphalt mixture,AC-13 asphalt mixtures mixed with basalt fibers with diameters of 7,16 and 25μm were designed and prepared.Rutting test,uniaxial penetration test,low temperature trabecular test,immersion Marshall test and freeze-thaw splitting test were used to study its road performance.Ideal cracking test and dynamic modulus test were used to test its mechanical properties.The results show that the diameter of basalt fiber has a great effect on the improvement of various performance indexes of asphalt mixture.The optimum oil-stone ratio of asphalt mix⁃ture increases slightly with the decrease of basalt fiber diameter.Under the same fiber content and fiber length,the smaller the fiber diameter,the larger amount of fibers,and the richer the reinforcement network.Therefore,the 7μm diameter basalt fiber has the most significant improvement effect on the high and low frequency dynamic modulus,medium and low temperature crack resistance and high temperature deformation resistance of asphalt mixture.The findings of the present work provides reference for the further design of basalt fiber asphalt mixture.

关 键 词：道路工程 玄武岩纤维 纤维直径 沥青混合料 路用性能 力学响应 

分 类 号：U414[交通运输工程—道路与铁道工程]