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Experimental study of moisture evaporation process with different soil characteristics

An, Ni, Tang, Chao-Sheng, Xu, Shi-Kang, Gong, Xue-Peng, Shi, Bin and Inyang, Hilary I. 2019. Experimental study of moisture evaporation process with different soil characteristics. Japanese Geotechnical Society Special Publication 7 (2) , pp. 78-83. 10.3208/jgssp.v07.011
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Evaporation of water from soils induces soil cracking, salinization and degradation, especially in arid irrigated areas. The factors that influence water evaporation from soil includes external type, referring to atmospheric conditions and interior type, covering surficial soil characteristics and water content conditions. In spite of the numerous assessment that have been made on the influence of atmospheric conditions and soil characteristics on evaporation of moisture from soils, many aspects still require further investigation due to soil complexity. In this study, laboratory-based evaporation tests were performed on clayey soil and three kinds of quartzite sands of different particle sizes using the same environmental conditions. Three different tests were performed on slurry samples to evaluate the effects of soil characteristics on its free water evaporation process at room temperature (20-22°C) and relative humidity (50 ± 2%) conditions: soil thickness, particle size of mixing sand and mixing sands ratio. It is shown that larger soil sample thicknesses accelerate water evaporation rate and extend the constant evaporation rate stage. Higher sand mix proportions lead to larger evaporation area and soil porosity, allowing higher evaporation rate and longer duration of the first stage and the starting of the falling rate stage at lower water content. However, soil particle size was not found to have a significant impact on evaporation rate on per unit weight of added soil basis.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
ISSN: 2188-8027
Date of First Compliant Deposit: 17 July 2020
Date of Acceptance: 6 March 2019
Last Modified: 07 Dec 2020 16:57

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