山东理工大学学报（自然科学版）2026，Vol.40Issue(2)：43-52,10.
SHA改性不同类型基体沥青黏弹流变力学模型适用性评价研究
Applicability evaluation research on the viscoelastic rheological mechanical models for SHA-modified different types of mother asphalts
摘要
Abstract
In order to investigate the applicability of existing viscoelastic rheological mechanical models to the modulus G*-frequency w master curve of SHA-modified asphalts,fifteen classical models are select-ed for frequency scanning test and G*-w master curve fitting analysis on various types of asphalts,inclu-ding 70#matrix asphalt,SBS-modified asphalt,CR-modified asphalt,SHA single-modified matrix as-phalt and SHA composite SBS or CR-modified asphalt.The results show that the mathematical model,the constitutive model,and the fractional derivative model can all be used to describe the G*-w master curve of matrix asphalts and SHA-modified asphalts.The auxiliary parameters of each model can effectively de-scribe the viscoelastic rheological mechanical properties of the matrix asphalts and SHA modified as-phalts.The addition of SBS and CR,as well as the increase of SHA mass ratio,enhances the proportion of elastic components and the viscosity,thereby improving the low-temperature stress relaxation and re-sistance to high-temperature creep deformation.Meanwhile,temperature sensitivity significantly decrea-ses.Furthermore,for every 4%increase in SHA content,the fitting accuracy(Δ value)of each model increases by 1.2～3.5 times compared to previous values.Matrix asphalt and SHA single-modified ma-trix asphalt are more suitable for mathematical models,while SBS or CR modified asphalt and SHA com-posite SBS or CR-modified asphalt are better fitted by constitutive models.The study recommends the use of three mathematical models—namely CA,CAM and Power-law model,as well as four constitutive mod-els—namely generalized Burgers,generalized Maxwell,generalized Kelvin-voigt and HS model to charac-terize the viscoelastic rheological mechanical properties of matrix asphalts and SHA-modified asphalts.The fitting accuracy of G*-w master curve is less than 1.0,which is significantly superior to other mod-els.关键词
道路工程/SHA改性沥青/黏弹流变力学模型/主曲线/拟合精度/温度敏感性Key words
road engineering/SHA-modified asphalt/viscoelastic rheological mechanical model/master curve/fitting value accuracy/temperature sensitivity分类
交通工程引用本文复制引用
CHEN Long,CHEN Ruipu,FENG Xiaowei,MAO Yu,ZHANG Haihong,CHEN Hongbin..SHA改性不同类型基体沥青黏弹流变力学模型适用性评价研究[J].山东理工大学学报（自然科学版）,2026,40(2):43-52,10.基金项目
山东省自然科学基金青年基金项目(ZR2022QE198) （ZR2022QE198）
甘肃省交通厅科技项目(2024-19,JTKYHTA-08) （2024-19,JTKYHTA-08）
兰州市科技计划项目(2022-5-49) （2022-5-49）
