Three-dimensional liquid transport in concrete cracks

J. Carmeliet, J.F. Delerue, K. Vandersteen, S. Roels

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

36 Citations (Scopus)

Abstract

Cracks in concrete are measured in 3D by microfocus X-ray computer tomography. The tomographic images are thresholded matching a characteristic of the measured crack attenuation profile. A methodology is proposed to convert the 3D measured voxel data into a network of parallel plates. The methodology is based on the determination of the aperture map and skeleton of the void space, and the segmentation of the void space in crack segments. The segmentation and network approach allows to study crack aperture and connectivity distributions of the crack. Static invasion percolation and moving front technique are used to analyse liquid flow in cracks. One-dimensional simulations of transport in a crack with variable crack width exemplify the retardation effect of narrow passages. In 2D, the narrow passages can be by-passed resulting in preferential flow patterns, where coarse crack zones remain unfilled. Mesh sensitivity in the network approach is studied showing a limited influence of the mesh size on the filling patterns, caused by a change of connectivity when refining the mesh. Comparison of 3D and 2D simulations indicates that flow in 2D crack sections can strongly underestimate possible fluid penetration depths. Finally the network model is validated analysing water uptake in a fractured brick sample.
Original languageEnglish
Title of host publicationInternational Conference on Computational Modelling of Concrete and Concrete Structures, Austria, Pongau, 2003
Pages671-687
DOIs
Publication statusPublished - 2004
Eventconference; International Conference on Computational Modelling of Concrete and Concrete Structures, Austria, Pongau, 2003 -
Duration: 1 Jan 2004 → …

Publication series

NameInternational Journal for Numerical and Analytical Methods in Geomechanics
Number7-8
Volume28
ISSN (Print)0363-9061

Conference

Conferenceconference; International Conference on Computational Modelling of Concrete and Concrete Structures, Austria, Pongau, 2003
Period1/01/04 → …
OtherInternational Conference on Computational Modelling of Concrete and Concrete Structures, Austria, Pongau, 2003

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    Carmeliet, J., Delerue, J. F., Vandersteen, K., & Roels, S. (2004). Three-dimensional liquid transport in concrete cracks. In International Conference on Computational Modelling of Concrete and Concrete Structures, Austria, Pongau, 2003 (pp. 671-687). (International Journal for Numerical and Analytical Methods in Geomechanics; Vol. 28, No. 7-8). https://doi.org/10.1002/nag.373