水镁石纤维与木质素纤维沥青胶浆流变性能研究  

Study on the Rheological Properties of Asphalt Mortar with Brucite Fiber and Lignin Fiber

作　　者：郑南翔[1] 段文杰[2] 张翔 廖周运 吴桐 赵礼澳 Zheng Nanxiang;Duan Wenjie;Zhang Xiang;Liao Zhouyun;Wu Tong;Zhao Liao(Highway Institute,Chang’an University,Xi’an 710064,China;Engineering Design and Research Institute of China Communications Second Highway Engineering Bureau Co.,Ltd.,Xi’an 710065,China;China Design Group,Nanjing 210014,China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中交第二公路工程局有限公司工程设计研究院,陕西西安710065 [3]华设设计集团股份有限公司,江苏南京210014

出　　处：《市政技术》2025年第1期207-214,共8页Journal of Municipal Technology

摘　　要：对比研究水镁石纤维与木质素纤维在不同温度、掺量下对沥青胶浆流变性能的影响,按照1.6的粉胶比分别制备纤维掺量为0%、1.3%、2.6%、3.9%、5.2%的纤维沥青胶浆。通过锥入度试验、动态剪切流变试验和弯曲梁流变试验,系统地分析了纤维沥青胶浆的锥入度、抗剪强度、复数模量、相位角、车辙因子、劲度模量和劲度变化率等关键性能指标的变化规律。研究结果表明,水镁石纤维与木质素纤维均能在沥青胶浆中形成有效的三维网状结构,显著地提升了沥青胶浆的高温稳定性。沥青与纤维表面形成的界面粘结层不仅优化了沥青胶浆的高温性能,同时也增强了其在低温条件下的应力消散能力,从而大幅增强了沥青胶浆在低温条件下的抗裂能力。The effects of brucite fiber and lignin fiber on the rheological properties of asphalt mortar at different temperatures and dosages were comprehensively studied.According to a powder to binder ratio of 1.6,fibrous asphalt mortar with fiber dosages of 0%,1.3%,2.6%,3.9%,and 5.2%were prepared.Through cone penetration test,dynamic shear rheological test,and bending beam rheological test,the variation laws of key performance indicators such as cone penetration,shear strength,complex modulus,phase angle,rutting factor,stiffness modulus,and stiffness change rate of fibrous asphalt mortar were systematically analyzed.The research results indicate that both brucite fibers and lignin fibers can form an effective 3D network structure in asphalt mortar,which significantly improves the high-temperature stability.The interface bonding layer formed between asphalt and fiber surface not only optimizes the high-temperature performance of asphalt mortar,but also enhances its stress dissipation ability under low-temperature conditions,thereby greatly enhance the crack resistance of asphalt mortar.

关 键 词：水镁石纤维 木质素纤维 沥青胶浆 高低温性能 流变性能 

分 类 号：U414[交通运输工程—道路与铁道工程]