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Non-Stationary Nonlinear Problem of Moisture Transport in Porous Building Materials

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Abstract:

The article investigates the process of liquid penetration into porous building materials, including concrete, brick, drywall, plaster, aerated concrete, and others. The influence of moisture on the durability, thermal insulation properties, and structural integrity of materials is examined. The relevance of developing mathematical models for predicting moisture ingress in constructions is highlighted, as this enables the minimization of operational costs and enhancement of building energy efficiency. A nonlinear diffusion model is proposed, taking into account the dependence of the diffusion coefficient on moisture concentration. Experimental data were approximated, and model parameters for specific materials were determined. Both stationary and nonstationary moisture transport problems are considered, with analytical solutions and a methodology for their application in predicting the depth of moisture penetration presented. The results can be integrated into BIM systems, opening new perspectives for use in digital construction.

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Periodical:

Materials Science Forum (Volume 1169)

Pages:

117-125

DOI:

https://doi.org/10.4028/p-PJl1hX

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Online since:

November 2025

Authors:

Mykola Riabchykov*, Olexandr Alexandrov, Mykyta Alexandrov, Yuriy Sychov

Keywords:

Diffusion Coefficient, Energy Efficiency, Mathematical Modeling, Moisture Penetration, Porous Building Materials, Structural Durability

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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