Aggregate shape effect on the diffusivity of mortar: A 3D numerical investigation by random packing models of ellipsoidal particles and of convex polyhedral particles

被引：125
|
作者：
Liu, Lin [1 ]
Shen, Dejian [1 ]
Chen, Huisu [2 ]
Xu, Wenxiang [3 ]
机构：
[1] Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China
[2] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing 211189, Jiangsu, Peoples R China
[3] Hohai Univ, Coll Mech & Mat, Inst Soft Matter Mech, Nanjing 210098, Jiangsu, Peoples R China
来源：
COMPUTERS & STRUCTURES | 2014年 / 144卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Shape effect; Diffusivity; Particle packing; Ellipsoidal particles; Polyhedral particles; RANDOM SEQUENTIAL PACKING; CEMENT-BASED MATERIALS; CHLORIDE DIFFUSIVITY; SIZE DISTRIBUTION; INTERNAL DAMAGE; VOLUME FRACTION; CONCRETE; PASTE; MICROSTRUCTURE; SIMULATION;
D O I：
10.1016/j.compstruc.2014.07.022
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
This paper investigates the influence of aggregate shape on the diffusivity of mortar in three dimensions by random packing models of ellipsoidal and convex polyhedral particles. From a digital mesostructure and by a lattice approach, the diffusivity of mortar can be predicted. Simulations are compared with experimental results from literature and are discussed for mono-sized and multi-sized particle packing with and without interfacial transition zones (ITZ). It was found that the shape of aggregate has a significant effect on the diffusivity of mortar, and for oblate ellipsoids, the shape effect is most pronounced comparing to prolate ellipsoids and polyhedrons. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：40 / 51
页数：12
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