UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Lattice Boltzmann simulation of the ionic diffusivity in unsaturated cement paste

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. Green open access

[thumbnail of 2012_MicroDurability.pdf]
Preview
Text
2012_MicroDurability.pdf - Accepted Version

Download (587kB) | Preview

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
Downloads since deposit
44Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item