基于大振幅振荡剪切(LAOS)的沥青非线性流变行为研究  

Study on nonlinear rheological behavior of bitumen based on large amplitude oscillation shear(LAOS)test

作　　者：樊泽鹏 王梓佳 徐加秋 王大为 OESER Markus[2] FAN Zepeng;WANG Zijia;XU Jiaqiu;WANG Dawei;OESER Markus(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,China;Institute of Highway Engineering,RWTH Aachen University,Aachen 52074,Germany;Beijing Zhongqi Zhuochuang Technology Development Co.Ltd,Beijing 100101,China)

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [2]亚琛工业大学道路工程研究所,德国亚琛52074 [3]北京中企卓创科技发展有限公司,北京100101

出　　处：《中南大学学报（自然科学版）》2021年第7期2258-2267,共10页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划项目(2019YFE0116300);黑龙江省自然科学基金资助项目(JJ2020ZD0015)。

摘　　要：借助先进的流变测试平台和非线性流变学方法(傅立叶流变学和Lissajous曲线),研究LAOS测试条件(温度、速率)和沥青性质(产地、老化状态)对其非线性流变行为的影响规律。研究结果表明:24℃条件下沥青的三阶相对谐波强度比I_(3)/I_(1)远比36℃和48℃的三阶相对谐波强度比I_(3)/I_(1)大,该指标随测试温度升高明显减小。对比沥青的I_(3)/I_(1)和Lissajous曲线发现,沥青材料的非线性程度随温度降低而显著增大,随速率增大而增大;对比2种针入度分级相同、来源产地不同的基质沥青,发现其I_(3)/I_(1)和Lissajous曲线均未见明显差异,说明沥青的来源产地不会明显影响其非线性流变行为;对比未老化、短期老化和长期老化沥青的I_(3)/I_(1)和Lissajous曲线,发现随老化程度增加,I_(3)/I_(1)明显增大,Lissajous曲线出现扭曲,表明老化会显著增强沥青的非线性程度。The advanced rheology test platform and the nonlinear rheology methods(Fourier transform rheology and Lissajous curve method)were employed and introduced to investigate the effects of LAOS testing conditions(temperature and rate)and bitumen properties(origin and aging degree)on the nonlinear rheological behavior of bitumen.The results show that the third-order relative harmonic intensity ratio of I_(3)/I_(1) of bitumen at 24℃were much greater than those of the 36℃and 48℃cases,and this index significantly decreases with temperature.Comparisons based on the Lissajous curves and third-order relative harmonic intensity ratio of I_(3)/I_(1) indicate that the nonlinearity of bitumen increases with the decrease of temperature,but increases with the increase of rate.A comparison of two base bitumen binders with the same penetration grade but different origin shows that no significant difference was observed in term of the index I_(3)/I_(1) and Lissajous curves.This means that the origin of bitumen does not significantly affect the nonlinearity of bitumen.Finally,the comparison among unaged,shortterm aged and long-term aged bitumen binders shows that with the increase of aging degree,the index I_(3)/I_(1) increases significantly and the Lissajous curves distortion becomes obvious,indicating an enhanced nonlinearity of bitumen with aging.

关 键 词：沥青 非线性流变 大振幅剪切振荡 傅立叶变换 Lissajous曲线 

分 类 号：U414[交通运输工程—道路与铁道工程]