Modeling Concrete Exposed to High Temperature: Impact of Dehydration and Retention Curves on Moisture Migration
International Journal for Numerical and Analytical Methods in Geomechanics 2018
Dorjan Dauti, Stefano Dal Pont, Benedikt Weber, Matthieu Briffaut, Nikolajs Toropovs, Mateusz Wyrzykowski, Giuseppe Sciume

High‐performance concrete is a widely used building material for tunnels, high‐ rise buildings, nucle ar plants etc. When these structures are exposed to fire, high‐performance concrete is prone to spalling. Moisture migration is believed to be one of the processes directly related to this phenomenon. In this paper, moisture profiles measured experimentally from neutron radiography on heated concrete are compared with results from a numerical model implemented in the finite element code Cast3M. The water loss measured experimentally, and the numerical results suggest that the commonly used constitutive laws for dehydra- tion and water retention curves need to be reconsidered. The influence of these constitutive laws on the moistu re migration is investigated. The dehydration constitutive law plays an important role on the dehydration front but has negligible effect on the moistur e accumulation behind this front. By contrast, the water retention curves do not influence the dehydration front but affect the quantity and location of water condensation. The role of the permeability is also discussed


Atslēgas vārdi
dehydration, finite element modeling, heated concrete, moisture migration, porous media
DOI
10.1002/nag.2802
Hipersaite
https://onlinelibrary.wiley.com/doi/abs/10.1002/nag.2802

Dauti, D., Dal Pont, S., Weber, B., Briffaut, M., Toropovs, N., Wyrzykowski, M., Sciume, G. Modeling Concrete Exposed to High Temperature: Impact of Dehydration and Retention Curves on Moisture Migration. International Journal for Numerical and Analytical Methods in Geomechanics, 2018, Vol. 1, No. 1, 1.-15.lpp. ISSN 0363-9061. e-ISSN 1096-9853. Pieejams: doi:10.1002/nag.2802

Publikācijas valoda
English (en)
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