Determination of Salt Transport Properties of Sandstone: A Combined Experimental/Computational Approach

Abstract:

A combined experimental/computational approach is applied for the determination of material parameters describing the transport of sulphate solution in porous structure of sandstone. The investigated sandstone, frequently used in historical buildings on the Czech territory, is chosen as a typical representative of stone masonry materials. At first, the moisture and sulphate concentration profiles in simulated 1-D water and sulphate solution transport experiment are measured. Here, the moisture content is determined by the gravimetric method, the sulphate concentration is measured by the ion chromatography. As a penetrating medium, 1M Na₂SO₄ water solution is used. The sulphate binding isotherm is experimentally accessed using the adsorption method. The experimental data are subjected to an inverse analysis assuming a diffusion-advection mode of sulphate transport. Finally, the moisture diffusivity for transport of Na₂SO₄ water solution, and the sulphate diffusion coefficient are calculated as the functions of moisture content and sulphate concentration, respectively.

• Periodical: Advanced Materials Research (Volume 1125)
• Pages: 382-386
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1125.382
• Online since: October 2015
• Authors: Zbyšek Pavlík, Milena Pavlíková, Robert Černý
• Keywords: Diffusion-Advection Model, Inverse Analysis, Moisture Diffusivity, Stone Masonry, Sulphate Diffusion Coefficient

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