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Article

Analysis of Bound Water and Its Influence Factors in Mixed Clayey Soils

1
Yellow River Conservancy Technical Institute, Kaifeng 475004, China
2
College of Civil and Architectural Engineering, Guilin University of Technology, Guilin 541004, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Domenico Cicchella
Water 2021, 13(21), 2991; https://doi.org/10.3390/w13212991
Received: 18 September 2021 / Revised: 19 October 2021 / Accepted: 19 October 2021 / Published: 22 October 2021
(This article belongs to the Special Issue Water–Rock/Soil Interaction)
Bound water is an important factor in controlling the physical, chemical and mechanical properties of clayey soils, and it plays an important role in geotechnical engineering disaster prevention and environmental protection. There are many factors (such as soil texture, mineral composition, specific surface area (SSA), organic matter content, porosity and so on) that affect bound water in natural clayey soils. However, the main factors are mineral composition and specific surface area (SSA). Experimental tests on specific surface area and isothermal adsorption of a series of artificial mixed clayey soils were carried out to determine the different types of bound water. On this basis, the relationship between the bound water of mixed clayey soils and influencing factors of mineral composition and specific surface area are discussed. The results show that relative humidities of RH = 0.90 and 0.98, in an isothermal adsorption method, are the boundary-dividing points between strongly bound water and weakly bound water, and between weakly bound water and free water, respectively. The bound water content of the mixed clayey soils increased linearly with the montmorillonite content and specific surface area. Clay’s mineral composition (montmorillonite) was found to be the most fundamental influencing factor. View Full-Text
Keywords: mixed clayey soils; bound water; mineral composition; specific surface area (SSA); isothermal adsorption method mixed clayey soils; bound water; mineral composition; specific surface area (SSA); isothermal adsorption method
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MDPI and ACS Style

Yang, E.-J.; Zeng, Z.-T.; Mo, H.-Y.; Hu, T.; Yang, C.-L.; Tang, S.-H. Analysis of Bound Water and Its Influence Factors in Mixed Clayey Soils. Water 2021, 13, 2991. https://doi.org/10.3390/w13212991

AMA Style

Yang E-J, Zeng Z-T, Mo H-Y, Hu T, Yang C-L, Tang S-H. Analysis of Bound Water and Its Influence Factors in Mixed Clayey Soils. Water. 2021; 13(21):2991. https://doi.org/10.3390/w13212991

Chicago/Turabian Style

Yang, Er-Jing, Zhao-Tian Zeng, Hong-Yan Mo, Tao Hu, Cheng-Lin Yang, and Shuang-Hui Tang. 2021. "Analysis of Bound Water and Its Influence Factors in Mixed Clayey Soils" Water 13, no. 21: 2991. https://doi.org/10.3390/w13212991

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