摘要
为研究玄武岩纤维在沥青胶浆中的流变性能,该研究采用硅烷偶联剂作为玄武岩纤维的改性剂,探究不同掺量下偶联改性玄武岩纤维对沥青胶浆性能的影响。通过锥入度试验、弯曲梁流变试验和动态剪切试验,研究不同温度及掺量对沥青胶浆稠度流变性能、高温稳定性、低温抗裂性的影响。结果表明:通过偶联改性玄武岩纤维可以增强沥青胶浆的抗剪强度和稠度。改性后沥青胶浆的相位角减小,弹性响应增强,复数模量增大。偶联改性玄武岩纤维可显著增强与沥青之间的吸附作用,提高沥青的高温抗变形和低温抗裂性能,且偶联改性后玄武岩纤维的最佳纤维掺量为2.6%。
To investigate the rheological properties of basalt fiber asphalt mastic,a silane coupling agent was used as a modifier for basalt fibers,and the effects of varying fiber contents were analyzed.Cone penetration tests,bending beam rheological tests,and dynamic shear rheometer tests were conducted to evaluate the rheological properties of asphalt mastic consistency,high-temperature stability,and low-temperature cracking resistance under different temperatures and fiber contents.The findings show that the silane-coupled basalt fibers enhance the shear strength and consistency of asphalt mastic.After modification,the phase angle decreases;elastic response increases,and complex modulus improves.Adsorption capacity between fibers and asphalt increases significantly,enhancing high-temperature deformation resistance and low-temperature cracking resistance of asphalt.The optimal fiber content for silane-coupled basalt fibers is approximately 2.6%.
作者
刘元德
郑南翔
张翔
高海伟
张博文
LIU Yuande;ZHENG Nanxiang;ZHANG Xiang;GAO Haiwei;ZHANG Bowen(Zhangye Highway Development Center of Gansu Province,Zhangye,Gansu 734000,China;School of Highway,Chang’an University,Xi’an,Shaanxi 710064,China)
出处
《中外公路》
2025年第3期89-95,共7页
Journal of China & Foreign Highway
关键词
沥青胶浆
流变性能
硅烷偶联剂
玄武岩纤维
高温性能
低温抗裂性
asphalt mastic
rheological property
silane coupling agent
basalt fiber
high-temperature performance
low-temperature cracking resistance
