基于微观结构的北美岩沥青改性机理研究  

Study on the North American rock asphalt modified mechanism based on microstructure

作　　者：黄文通[1] 徐国元[1] 刘宇 王端宜[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]广西金盟工程有限公司,南宁530001

出　　处：《功能材料》2015年第12期12082-12086,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51078151);广东省交通运输厅科技资助项目(科技-2014-02-004)

摘　　要：采用软化点实验和动态剪切温度扫描实验分析了北美岩沥青改性沥青的高温性能;利用电子扫描电镜法、荧光显微镜法、差示扫描量热法、核磁共振波谱法,对不同掺量的北美岩沥青改性沥青进行微观结构的改性机理研究。结果表明,北美岩沥青有效提高沥青流变性能和热稳定性能,改善沥青抗车辙能力和耐老化能力。北美岩沥青增强沥青分子间作用力,提高沥青粘度,改善沥青温度敏感性。北美岩沥青对基质沥青存在物理改性和化学改性的双重改性作用。The softening point test and dynamic shear temperature sweep test have been used to analyze high temperature performance of North American rock modified asphalt. Fluorescence microscopy,differential scanning calorimetry and nuclear magnetic resonance spectrum have been used to study modified asphalt microstructure with various mixing amounts of the North American rock asphalt. The results suggest that the North American rock asphalt can:(1) increase the rheological performance and thermal stability of asphalt effectively,thereby improving the anti-rutting properties and the anti-aging properties of modified asphalt;(2) reinforce asphalt intermolecular forces,improving viscosity and temperature sensitivity of modified asphalt;(3) the North American rock asphalt has a double modifying function on base asphalt,physically and chemically.

关 键 词：北美岩沥青 微观结构 改性机理 荧光显微 差示扫描量热 核磁共振波谱 

分 类 号：U416.217[交通运输工程—道路与铁道工程]