Cross-scale Correlation of Macro-micro Evaluation Indexes for Asphalt Binder  

作　　者：YU Tengjiang ZHANG Haitao SUN Xiaowen LI Ming WANG Haomin 于腾江;张海涛;SUN Xiaowen;LI Ming;WANG Haomin(College of Civil Engineering,Northeast Forestry University,Harbin,150040,China;Safety Production Technology Center of Heilongjiang Province,Harbin,150040,China;School of Civil Engineering&Architecture,Chongqing Jiaotong University,Chongqing,400074,China)

机构地区：[1]College of Civil Engineering,Northeast Forestry University,Harbin,150040,China [2]Safety Production Technology Center of Heilongjiang Province,Harbin,150040,China [3]School of Civil Engineering&Architecture,Chongqing Jiaotong University,Chongqing,400074,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第5期892-899,共8页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Fundamental Research Funds for the Central Universities (No. 2572021AW10)。

摘　　要：In order to further study the reliability of macro evaluation indexes,molecular dynamics (MD) was applied to the evaluation of asphalt binder.Micro evaluation indexes (potential energy,surface free energy,solubility parameter and diffusion coefficient) of asphalt binder in different service phases (virgin,modified,aged and rejuvenated) were simulated.Combined with the variation characteristics of asphalt binder macro evaluation indexes (permeability,ductility,viscosity and softening point) in different service phases,the cross-scale correlation of macro-micro evaluation indexes was explored.The results show that the macro and micro evaluation indexes of asphalt binder have different characteristics in different service phases.The essence of the variation in the properties of asphalt binders is the difference in micro composition.In addition,there is a certain correlation between macro and micro evaluation indexes,which can be described by the gray relation theory.The cross-scale correlation of macro-micro evaluation indexes can provide a certain theoretical basis for the development of asphalt binder.

关 键 词：asphalt binder macro-micro indexes cross-scale correlation different service phases molecular dynamics 

分 类 号：U414[交通运输工程—道路与铁道工程]