Nonlinear rheological behavior of asphalt based on large amplitude oscillation shear test under different loading,aging,and modification conditions  

作　　者：Jiaqiu Xu Zijia Wang Zepeng Fan Junfu Liu Guoyang Lu Dawei Wang 

机构地区：[1]School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,China [2]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong,China [3]Civil Aviation Research Base(Beijing)Co.,Ltd.,Beijing 100621,China [4]Department of Architecture and Civil Engineering,City University of Hong Kong,Hong Kong,China

出　　处：《Journal of Road Engineering》2025年第1期48-64,共17页道路工程学报(英文)

基　　金：supported by the National Key Research and Development Program of China(2023YFB2603500).

摘　　要：To reveal the effects of environmental and loading conditions,as well as asphalt properties on the nonlinear rheological behavior of asphalt,the large amplitude oscillation shear(LAOS)test was introduced,and the Fourier transform rheology,Lissajous curve method,and the LAOS fatigue test have been applied to investigate the nonlinear rheological behavior of asphalt binders.The research results indicate that a decrease in temperature,an increase in shear frequency and strain level,the introduction of polymer modifiers,and the aging effect of asphalt can significantly increase the nonlinearity of asphalt,manifested by the higher relative magnitude of the third harmonic and zero-strain nonlinear coefficient.For the two polymer modifiers selected in this study,the 4%polyurethane modifier exhibits a higher nonlinear lifting effect than the 4%styrene-butadiene-styrene(SBS).The impact of long-term aging on nonlinear viscoelasticity is observably greater than that of short-term aging.The zero-strain nonlinear coefficient estimated based on the average value method can accurately characterize the nonlinear viscoelasticity of asphalt,which can serve as an effective supplement to the relative magnitude of the third harmonic.All asphalts exhibit shear thinning behavior under the test temperature of 24C,and the decrease in test temperature,the increase in shear rate and strain level,the introduction of modifiers,and the aging effect.

关 键 词：Nonlinear viscoelasticity Polymer modified asphalt Large amplitude shear oscillation Rheological behavior Shear thinning 

分 类 号：U414[交通运输工程—道路与铁道工程]