摘要
为研究水镁石纤维增强沥青胶浆的特性,制备及测试了纤维增强沥青胶浆。木质素纤维、玄武岩纤维和聚酯纤维用于比较研究。采用吸水性、烘箱加热和网篮析漏来评估纤维的湿润性、热稳定性、沥青吸收和稳定。锥入度试验来研究纤维增强沥青胶浆的抗剪切特性和抗车辙特性。此外通过扫描电子显微镜分析了纤维增强沥青的微观结构。结果表明:水镁石纤维与木质素纤维相比在潮湿环境下具有更好的保存状态和热稳定性。与玄武岩纤维和聚酯纤维相比,其对沥青吸收和稳定具有更好的效果。此外,水镁石纤维可以有效地改善抗车辙性能。水镁石纤维获得了空间网络从而增强了沥青胶结料的粘附性和稳定性。
To investigate the modification of brucite fiber, fiber reinforced asphah binder was prepared and tested. Lignin fiber, basalt fiber and polyester fiber were used for comparative studies. Water absorption,oven heating, mesh-basket draindown were designed to evaluate the fiber wettability, thermostability, asphalt absorption and stabilization. Cone penetration test were applied to research the shear resistance rheological property and rutting resistance of fiber reinforced asphalt. In addition, the microstructure of fibers and reinforced asphalt binders were analyzed via scanning electron microscopy. Results show that brucite fiber has a better state of preservation in humid environment and thermostability than lignin fiber. It obtains a better effect on asphalt absorption and stabilization than basalt fiber and polyester fiber. Besides, the brucite fiber can effectively improve the rutting resistance. The brucite fiber obtains a spatial networking to enhance the adhesion and stabilization of asphalt binders.
出处
《公路工程》
北大核心
2016年第5期273-276,共4页
Highway Engineering
关键词
水镁石纤维
沥青胶浆
锥入度试验
微观特性
brucite fiber
asphalt mastic
core penetration test
micro-structure properties
