### Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste

Mingzhong Zhang, Guang Ye UGent (2012) p.1-8
abstract
In order to assess the durability of concrete structures, it is essential to investigate the ionic diffusivity under unsaturated conditions. Simulation of the ioinc diffusivity in unsaturated cement-based materials is big challenge due to the complicated microstructures and the difficulties in modelling of multi-phase fluid flow in cement-based materials. In this study, the 3D microstructure of cement paste is obtained from X-ray μCT with a high resolution. In the simulation, the Shan-Chen multi-phase lattice Boltzmann model is modified to simulate the equilibrium distribution of water and gas in the obtained 3D microstructure at various degree of water saturation. A lattice Boltzmann diffusion model is applied to simulate the ionic diffusion and determine the ionic diffusivity based on Fick’s law. It was found that the ionic diffusivity shows a strong dependence on the degree of water saturation. The simulated results fit very well with the experimental data obtained from literature.
author
organization
year
type
conference
publication status
published
subject
in
Microstructural-related Durability of Cementitious Composites, RILEM Proceedings PRO 83
editor
Guang Ye UGent
pages
1 - 8
publisher
RILEM Publications
place of publication
Bagneux, France
conference name
2nd International Conference on Microstructural-related Durability of Cementitious Composites
conference location
Amsterdam, The Netherlands
conference start
2012-04-11
conference end
2012-04-13
ISBN
9782351581292
language
English
UGent publication?
yes
classification
C1
I have transferred the copyright for this publication to the publisher
id
2105960
handle
http://hdl.handle.net/1854/LU-2105960
date created
2012-05-14 14:05:16
date last changed
2012-05-16 11:30:18
@inproceedings{2105960,
abstract     = {In order to assess the durability of concrete structures, it is essential to investigate the ionic diffusivity under unsaturated conditions. Simulation of the ioinc diffusivity in unsaturated cement-based materials is big challenge due to the complicated microstructures and the difficulties in modelling of multi-phase fluid flow in cement-based materials. In this study, the 3D microstructure of cement paste is obtained from X-ray \ensuremath{\mu}CT with a high resolution. In the simulation, the Shan-Chen multi-phase lattice Boltzmann model is modified to simulate the equilibrium distribution of water and gas in the obtained 3D microstructure at various degree of water saturation. A lattice Boltzmann diffusion model is applied to simulate the ionic diffusion and determine the ionic diffusivity based on Fick{\textquoteright}s law. It was found that the ionic diffusivity shows a strong dependence on the degree of water saturation. The simulated results fit very well with the experimental data obtained from literature.},
author       = {Zhang, Mingzhong and He, Yongjia and Ye, Guang and Lange, David A and van Breugel, Klaas},
booktitle    = {Microstructural-related Durability of Cementitious Composites, RILEM Proceedings PRO 83},
editor       = {Ye, Guang and van Breugel, Klaas and Sun, Wei and Miao, Changwen},
isbn         = {9782351581292},
language     = {eng},
location     = {Amsterdam, The Netherlands},
pages        = {1--8},
publisher    = {RILEM Publications},
title        = {Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste},
year         = {2012},
}


Chicago
Zhang, Mingzhong, Yongjia He, Guang Ye, David A Lange, and Klaas van Breugel. 2012. “Lattice Boltzmann Simulation of the Ionic Diffusivity in Unsaturated Cement Paste.” In Microstructural-related Durability of Cementitious Composites, RILEM Proceedings PRO 83, ed. Guang Ye, Klaas van Breugel, Wei Sun, and Changwen Miao, 1–8. Bagneux, France: RILEM Publications.
APA
Zhang, Mingzhong, He, Y., Ye, G., Lange, D. A., & van Breugel, K. (2012). Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste. In G. Ye, K. van Breugel, W. Sun, & C. Miao (Eds.), Microstructural-related Durability of Cementitious Composites, RILEM Proceedings PRO 83 (pp. 1–8). Presented at the 2nd International Conference on Microstructural-related Durability of Cementitious Composites, Bagneux, France: RILEM Publications.
Vancouver
1.
Zhang M, He Y, Ye G, Lange DA, van Breugel K. Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste. In: Ye G, van Breugel K, Sun W, Miao C, editors. Microstructural-related Durability of Cementitious Composites, RILEM Proceedings PRO 83. Bagneux, France: RILEM Publications; 2012. p. 1–8.
MLA
Zhang, Mingzhong, Yongjia He, Guang Ye, et al. “Lattice Boltzmann Simulation of the Ionic Diffusivity in Unsaturated Cement Paste.” Microstructural-related Durability of Cementitious Composites, RILEM Proceedings PRO 83. Ed. Guang Ye et al. Bagneux, France: RILEM Publications, 2012. 1–8. Print.