Influence of Carbonation and Chemical Activity of Water on Coupled Moisture-Ion Transport in Cementitious Materials

Abstract:

The influence of the chemical activity effects on moisture transport in the presence of ions in cementitious materials is studied. Wetting-drying tests are carried out on various hardened concretes (sound and fully carbonated) with water. Moisture profiles are experimentally assessed by gamma-ray attenuation. A multispecies and multiphase numerical model, in which the Lin and Lee approach is applied to compute the chemical activity coefficients of water in presence of ions, is used to simulate the transport of ions and moisture. The drying kinetics is analyzed to assess the intrinsic permeability of the material by inverse analysis. Experimental profiles are compared to the simulations to illustrate the relevance of the modeling.

• Periodical: Defect and Diffusion Forum (Volumes 323-325)
• Pages: 263-268
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.323-325.263
• Online since: April 2012
• Authors: Xiao Meng Wang, Mickaël Thiéry, Véronique Baroghel-Bouny
• Keywords: Activity Coefficient, Carbonation, Multiphase Modeling

References

[1] K.S. Pitzer: Journal of Chemical Physics, Vol. 77 (1973), pp.268-277.

[2] C.L. Lin and L.S. Lee: Fluid Phase Equilibria, Vol. 205 (2003), pp.69-88.

[3] H.Y. Lin and L.S. Lee: Fluid Phase Equilibria, Vol. 237 (2005), pp.1-8.

[4] V. Baroghel-Bouny, M. Thiéry, and X.M. Wang: Cement and Concrete Research, Vol. 41 (2011), pp.828-841.

DOI: 10.1016/j.cemconres.2011.04.001

[5] Y. Mualem: Water Resource Research, Vol. 12 (1976), pp.513-522.

[6] M. Thiéry et al., in: 3rd International Conference on Coupled THMC Processes in Geo-systems. Lille (2008), pp.571-581.

[7] M. Thiéry et al. : Revue Euroéenne de Génie Civil. (2007), pp.1-39.

[8] O. Francy: Modelling of chloride ions ingress in partially water saturated mortars (in French), Ph.D. Thesis, Paul Sabatier University, Toulouse (1998).

[9] M. Thiéry et al. : Avancées dans le domaine de la carbonatation atmosphérique des matériaux cimentaires (in French), in : Catégorie ERLPC, IFSTTAR, Paris (2011).

[10] G. Villain, and M. Thiéry: NDT&E International, Vol. 39 (2006) pp.328-337.

[11] V. Baroghel-Bouny: Cement and Concrete Research, Vol. 37 (2007), pp.414-437.

[12] T.G. Kolda, R.M. Lewis and V. Torczon: SIAM review, Vol. 45 (2003), pp.385-482.

[13] M. Thiéry : Modélisation de la carbonatation atmosphérique des matériaux cimentaire (in French), Ph.D. Thesis, École Nationale des Ponts et Chaussées, Paris (2005).

DOI: 10.1016/s0152-9668(03)80006-2

[14] G. Villain, and M. Thiéry, in: 10th DBMC Conference on Durability of Building Materials and Components, Lyon (2005).