A three-dimensional multi-scale method to simulate the ion transport behavior of cement-based materials

被引：32

作者：

Liu, Zhiyong ^{[1
,2
,3
]}

Chen, Weiwei ^{[1
,2
]}

Zhang, Yunsheng ^{[4
]}

Lv, Henglin ^{[1
]}

机构：

[1] China Univ Min & Technol, Jiangsu Key Lab Environm Impact & Struct Safety E, Xuzhou 221116, Peoples R China

[2] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China

[3] JiangSu Collaborat Innovat Ctr Bldg Energy Saving, Xuzhou 221116, Peoples R China

[4] Southeast Univ, Jiangsu Key Lab Construct Mat, Nanjing 211189, Jiangsu, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 120卷

基金：

中国国家自然科学基金;

关键词：

Cement-based materials; Transport; Multi-scale; Three-dimensional; CHLORIDE MIGRATION TEST; COMPUTER-SIMULATION; PORE STRUCTURE; DIFFUSIVITY; CONCRETE; PASTE;

D O I：

10.1016/j.conbuildmat.2016.05.121

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The formation process of microstructures in cement pastes was first simulated with a numerical model. The simulated masses of the Ca(OH)(2) and C-S-H phases were verified by measuring values with thermogravimetry-differential scanning calorimetry (TG-DSC) and XRD-Rietveld analysis. Then, the main transport paths for corrosive media, including nano-scale C-S-H gel pores, micro-scale capillary pores and the interface transition zone, were extracted, and the corresponding effective transport coefficients were determined. Finally, a multi-scale transport model ranging from the nano-scale through the micro-scale and to the macro-scale of concrete was established based on the porous media mechanics and multi-scale method, combined with numerical calculation and 3D visualization. This model will help to design and predict the service life of concrete structures. Crown Copyright (C) 2016 Published by Elsevier Ltd. All rights reserved.

引用

页码：494 / 503

页数：10

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