个人信息Personal Information
副教授
硕士生导师
任职 : 辽宁省工程建设评标专家、辽宁省公路学会会员
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:交通运输系
学科:道路与铁道工程. 市政工程
办公地点:大连理工大学 综合实验4号楼 534室
电子邮箱:liwo@dlut.edu.cn
Influence of particle shape on aggregate mixture's performance: DEM results
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论文类型:期刊论文
发表时间:2019-02-17
发表刊物:ROAD MATERIALS AND PAVEMENT DESIGN
收录刊物:SCIE、Scopus
卷号:20
期号:2
页面范围:399-413
ISSN号:1468-0629
关键字:asphalt mixture; shape factors; DEM; ellipsoid particle; triaxial test
摘要:In order to study the effects of aggregate shape on the strength of mixtures, the glue-sphered ellipsoid particles were used to create cylinder samples, and triaxial tests were simulated using the discrete element method. This paper discussed (a) how to create ellipsoid aggregates by glued spheres and control its size; (b) how to simulate the triaxial performance of hot-mix asphalt (HMA) skeleton; and (c) how to choose coarse aggregates for HMA according to shape factors. Through computation, a nephogram of triaxial strength varying with shape factors Flatness and Elongation was finally obtained. The results showed that cubical and part of rod aggregate work much better in strength than others, which were proved to be consistent with that of experimental results.