多维数多尺度纳米材料改性沥青的微观机理  

Microscopic Mechanismvof Modified Asphalt by Multi-Dimensional and Multi-Scale Nanomaterial

作　　者：孙璐[1,2] 辛宪涛[1] 王鸿遥 顾文钧[1] 

机构地区：[1]东南大学交通学院,南京210096 [2]Department of Civil Engineering,The Catholic University of America [3]山东省烟台市公路管理局,山东烟台264001

出　　处：《硅酸盐学报》2012年第10期1437-1447,共11页Journal of The Chinese Ceramic Society

基　　金：交通部西部项目(0901005C);美国国家科学基金(CMMI-0644-552);江苏省自然科学基金重点项目(SBK200910046);山西省交通厅科技项目(7921000015);山东省交通厅科技项目(2009Y08)

摘　　要：选择多维数多尺度纳米材料有机膨润土、纳米SiO2及SBS为改性剂,研究其对基质沥青的改性作用。通过扫面电子显微镜、红外光谱、凝胶色谱和差示扫描量热等微观测试手段,观察分析了纳米改性沥青的微观结构特征和分子量、聚集态转变时的吸热量等材料属性,从微观的角度详细阐述了沥青的改性机理,与宏观性能对比,体现出微观改性机理和宏观路用性能的一致性。The nano-material with organobentonite,nano-SiO2and SBS at different dimensions and scales was used to modify a base asphalt material.The properties of asphalt modified with the nanomaterial were investigated by scanning electron microscopy,Fourier transform infrared spectroscopy,gel chromatography and differential scanning calorimetry,respectively.These properties investigated involved the microscopic structure feature,formula weight and absorbed heat during the change state of aggregation.The modification mechanism was proposed from the microscopic point of view.Compared to the macroscopic properties,the results reflected the consistency of the micro-modification mechanism and the pavement performance at a macroscopic level.

关 键 词：路面 改性沥青 纳米材料 微观机理 

分 类 号：U416.217[交通运输工程—道路与铁道工程]