Zhang, M;
He, Y;
Ye, G;
Lange, D;
van Breugel, K;
(2012)
Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste.
In: Ye, Guang and Breugel, K V and Sun, Wei and Miao, Chagwen, (eds.)
Proceedings of the 2nd International Conference on Microstructural-related Durability of Cementitious Composites.
(pp. pp. 1081-1089).
RILEM Publications: Amsterdam, Netherlands.
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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.
| Type: | Proceedings paper |
|---|---|
| Title: | Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste |
| Event: | 2nd International Conference on Microstructural-related Durability of Cementitious Composites, 11-13 April 2012, Amsterdam, Netherlands |
| ISBN-13: | 978-2-35158-129-2 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://hdl.handle.net/1854/LU-2106236 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Saved AAM to S: drive, contacted publisher about permissions: dg@rilem.net, applied default embargo, made live (LN 04/12/2018). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10060620 |
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