Numerical simulation of asphalt mixture based on three-dimensional heterogeneous specimen

作     者：张肖宁 万成 王栋 贺玲凤 

作者机构：Department of Civil and Transportation Engineering South China University of Technology Department of Civil and Environmental Engineering Virginia Polytechnic Institute and State University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2011年第18卷第6期

页      面：2201-2206页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(51038004) supported by the National Natural Science Foundation of China 

主　　题：asphalt mixture X-ray CT 3D heterogeneous specimen numerical simulation 

摘      要：In order to verify the validity of finite element numerical simulation method for asphalt mixture, which consists of aggregates, mastic （where mastic is a kind of fine mixture composed of asphalt binder mixed with fines and fine aggregates） and air voids, based on three-dimensional （3D） heterogeneous specimen, X-ray computerized tomography （X-ray CT） was used to scan the asphalt specimens to obtain the real internal microstrnctures of asphalt mixture. CT images were reconstructed to build up 3D digital specimen, and the viscoelastic properties of mastic were described with Burgers model The uniaxial creep numerical simulations of three different levels of aggregate gradation were conducted. The simulation results agree well with the experimental results. The numerical simulation of asphalt mixture incorporated with real 3D microstructure based on finite element method is a promising application to conduct research of asphalt concrete. Additionally, this method can increase the mechanistic understanding of global viscoelastic properties of asphalt mixtures by linking the real 3D microstructure.