摘要
为了将沥青胶结料的化学分析与路面使用性能联系起来,并建立规范、统一的FTIR光谱定量分析方法.采用宏观与微观分析相结合的方法,对经不同RTFOT老化周期和PAV老化前后的沥青胶结料进行FTIR表征测试分析;基于麦夸特法加通用全局优化算法对不同温度、控制应力下DSR试验的沥青胶结料复数剪切模量和相位角及FTIR测试官能团含量变化指数进行多元统计回归分析.结果表明：以吸收峰两侧最低点的切线为校正基线来计算FTIR谱图吸收峰面积、以2 000~650 cm-1作为基准谱峰范围可作为FTIR定量分析的标准;1 700 cm-1羰基和1 031 cm-1亚砜基吸收峰随着老化时间的增加而增大;沥青胶结料经RTFOT和PAV老化后其复数剪切模量和相位角随着化学官能团含量变化呈现出多元线性关系.
In order to link the chemical analysis with the pavement performance of asphalt binders,and establish a standardized and unified quantitative analysis method for Fourier transform infrared spectroscopy（FTIR）, the asphalt binders of rolling thin film oven test（RTFOT） and pressure aging vessel（PAV） before and after aging were characterized by FTIR through macroscopic and microscopic methods. FTIR spectral quantitative analysis of functional change index and the complex shear modulus and phase angle of asphalt binders in dynamic shear rheometer（DSR） test under different temperature and controlled stress were conducted multivariate statistical regression analysis based on Levenberg-Macquarie method and general universal optimization algorithm. The results show that the absorption peak area of FTIR spectrum is calculated with the tangent line of the lowest point on both sides of the absorption peak, and the standard of FTIR quantitative analysis is with 2 000 ~ 650 cm-1 as the reference spectral range. The absorption peaks of 1 700 cm-1 carbonyl and 1 031 cm-1 sulfoxide increase with the increase of aging time. The complex shear modulus and phase angle of the asphalt binder after RTFOT and PAV show a multiple linear relationship with the change of chemical functional groups.
作者
李萍
念腾飞
魏定邦
林梅
Li Ping1a,b Nian Tengfei1a Wei Dingbanga Lin Mei1a,b(la School of Civil Engineering, lb Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China; Gansu Changlong Highway Maintenance Technology Institute Co. Ltd., Lanzhou 730000, Chin)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第2期34-39,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51668041)
甘肃省科技支撑计划资助项目(1504GKCA031)
关键词
沥青胶结料
傅里叶变换红外光谱
定量分析
特征官能团指数
流变参数
asphalt binder
Fourier transform infrared spectroscopy
quantitative analysis
characteristic functional group index~ rheological parameters
