Determination Of Water And Salt Transport
Parameters Of Porous Materials Using Methods
Of Inverse Modelling
Author(s)
L. Fiala, Z. Pavlík, M. Pavlíková & R. Černý
Abstract
A computational assessment of water and salt transport parameters describing
the coupled moisture and chloride transport in porous media is presented in this
paper. The experimentally determined moisture profiles, chloride concentration
profiles and chloride binding isotherm are subjected to inverse analysis where
three different modes of salt solution transport are assumed. On the basis of this
analysis, moisture dependent moisture diffusivity and salt concentration
dependent chloride diffusion coefficient are calculated. The obtained results can
find use in computational modelling of salt transport in porous building materials
which is currently a very important topic, particularly from the point of view of
durability of building materials and service life of building structures exposed to
salt attack.
Keywords: moisture diffusivity, salt diffusion coefficient, chloride binding
isotherm.
1 Introduction
The durability and service life assessment of building materials and structures
due to the effect of salts can be done most effectively by means of mathematical
and computational modelling. In this way, the time development of water and
salt concentration fields can be obtained which is crucial for prediction of
possible future damage related to the salt crystallization and efflorescence.
However, the accuracy of simulated water and salt concentration fields critically
depends on the availability of all input parameters.
Keywords
moisture diffusivity, salt diffusion coefficient, chloride binding
isotherm.
Related Book
Other papers in this volume
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