短期老化方法对沥青性能评价的适用性  

Applicability of Short-term Aging Methods to Evaluate Asphalt Performance

作　　者：梁志豪 邢明亮[1] 李祖仲[1] 关博文[1] LIANG Zhi-hao;XING Ming-liang;LI Zu-zhong;GUAN Bo-wen(School of Materials Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China)

机构地区：[1]长安大学材料科学与工程学院

出　　处：《筑路机械与施工机械化》2019年第9期23-29,共7页Road Machinery & Construction Mechanization

基　　金：青海省自然科学基金资助项目（2017-ZJ-764）;陕西省交通科技项目（16-16K)

摘　　要：为了探讨薄膜加热老化试验(TFOT)与旋转薄膜加热老化试验(RTFOT)在模拟沥青短期老化过程中的适用性,选择2种不同油源的基质沥青与3种不同掺量的SBS改性沥青、3种不同掺量橡胶粉改性沥青进行试验,比较了老化前后沥青针入度、软化点、延度、动力黏度的变化趋势,并采用红外光谱法揭示特征官能团的演变规律,分析了2种方法对不同类型及改性剂掺量的沥青老化效果差异,以此评价2种方法对沥青老化的适用性.In order to investigate the applicability of the Thin Film Oven Test (TFOT) and the Rotating Thin Film Oven Test (RTFOT) in simulating the short-term aging process of asphalt, two kinds of matrix asphalt with different oil sources and six types of modified asphalt were selected for the tests. The trends of penetration, softening point, ductility and dynamic viscosity of asphalt before and after aging were compared. The evolution of characteristic functional groups was revealed by infrared spectroscopy. The difference of TFOT and RTFOT in their aging effects on asphalt with different types and content of modifiers was analyzed, and the applicability of those two methods was evaluated.

关 键 词：沥青材料 变化趋势 短期老化 适用性 

分 类 号：U414.01[交通运输工程—道路与铁道工程]