preprints.org > environmental and earth sciences > sustainable science and technology > doi: 10.20944/preprints202311.0211.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 2 November 2023 / Approved: 3 November 2023 / Online: 3 November 2023 (05:02:18 CET)

The paper presents the main experimental capabilities of the automatic system for the study of the interaction between porous media and atmosphere. This system is one of the possible variants of patent 2-241-477. The paper shows the result of a drying and wetting study of a tailings sample. The sample is 32 cm in height and 29 cm in diameter. The saturation and drying process was carried out at 26 degrees Celsius at the sample surface, an air velocity of 2 m/s and a relative humidity of 60%. The recharge applied to the column surface was 0.3 cm3/cm2/minute. The results show the effectiveness of the system in controlling the spatial-temporal variation of different physical properties of the porous medium in the vertical and surface profile. The controlled variables include volumetric water content, suction, relative humidity, sample weight variation due to recharge or drying, shrinkage, temperature, etc. The experiment shows how the tailings saturate very quickly but dry very slowly. Tailings consolidation occurs in the drying and wetting processes, being higher in the first one.

automatic system; porous media; suction; relative humidity; degree of saturation, shrinkage; loss water by evaporation; environmental condition; interaction between porous media and atmosphere; volumetric water content

Environmental and Earth Sciences, Sustainable Science and Technology

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