Pore water freezing characteristic in saline soils based on pore size distribution

Wan, Xusheng; Yang, Zhaohui

doi:10.1016/j.coldregions.2020.103030

Cited by 24 publications

(22 citation statements)

References 48 publications

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“…The correlation between unfrozen water content and temperature is described by the phase composition curve (Anderson & Tice, 1972; Liu & Yu, 2013; Lovell, 1957). Soluble salts (e.g., Na 2 SO 4 , NaCl , and Na 2 CO 3 ) are common components in the natural soils in the cold and arid regions of China and elsewhere (Han et al, 2018; Wang et al, 2020; Xu, 1993), and the freezing points of pore water solutions are also depressed by the solutes (Banin & Anderson, 1974; Bouyoucos & McCool, 1916; Wan & Yang, 2020; Xiao et al, 2018). The solubility of the salts is governed by the temperature, and the solute will precipitate from the pore solution as hydrate crystal when the solute concentration approaches or exceeds the solubility, which also consumes the unfrozen water (Pronk, 2006; Steiger & Asmussen, 2008; Wan et al, 2017; Xu et al, 2001; Zhang, 1991).…”

Section: Introductionmentioning

confidence: 99%

“…Several theoretical and empirical phase composition curve models for pore waters of soils in cold regions have been proposed (Anderson & Tice, 1972; Dillon & Andersland, 1966; Michalowski & Zhu, 2006; Teng et al, 2020; Wang et al, 2017), some of which take the solute compositions into account (Banin & Anderson, 1974; Wan & Yang, 2020; Xu et al, 1995; Yong et al, 1979; Zhou et al, 2020). However, these models only include the water‐ice phase transition in the pore solution, and none of them consider the solution‐crystal phase transition.…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned above, the solution‐crystal phase transition also significantly affects the unfrozen water content and cannot be ignored. Some of these previous theoretical models are based on capillary freezing theory (Liu & Yu, 2013; Wan & Yang, 2020; Wang et al, 2017; Zhou et al, 2018), which assumes the pore water is frozen in pores of various sizes. The calculation processes are complex and include many parameters, such as pore size distribution, which impedes the wide utilization of these models (Chai et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Simplified Model for the Phase Composition Curve of Saline Soils Considering the Second Phase Transition

Wang

Liu

et al. 2021

Water Resources Research

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Phase composition curves are the basis for the thermo‐hydraulic analysis of saline soil in cold regions. Two types of phase transition, namely, the water‐ice and solution‐crystal phase transitions, would occur in saline soils due to the variation in temperature and migration of moisture and solute, and the occurrence order of the two types of phase transition is governed by the initial salt and water content. This study proposed a conceptual model for the water phase composition curve in saline soils by simplifying the correlation between pore solution properties and soil grain. This model was subsequently applied to the analysis of phase composition characteristics and explained the occurrence of a second phase transition in saline soil. The model was validated by the experimental data from known soils and showed both good results and ease of use when compared to three previous models. The conceptual model provides a convenient and intuitive way to understand the phase composition characteristics of pore solution in saline soil in cold regions and is also easy to use in the thermo‐hydraulic analysis such as the prediction of unfrozen water content and solute concentration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Simplified Model for the Phase Composition Curve of Saline Soils Considering the Second Phase Transition

Wang

Liu

et al. 2021

Water Resources Research

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“…At the same time, it was closely related to water activity and pore size, etc. e initial freezing temperature decreased with the decrease of water activity, pore size, and unfrozen water content [23][24][25]. Salt heaving mainly occurred from 0 °C to the initial precipitation temperature of salt crystal.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Salt‐Frost Heaving Rules and Mechanical Properties of Chlorite Saline Soil along the Duku Highway under Freezing‐Thawing Action

Huang

Zhang

Guo

et al. 2022

Advances in Civil Engineering

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Aiming to investigate salt-frost heaving rules and the mechanical properties of natural saline soil along the Duku Highway subjected to multiple freezing-thawing cycles, we collected natural saline soil samples from the alluvial-proluvial plain in front of the Dushanzi Mountain at the starting point of the Duku Highway. Then, we conducted mineral composition analysis tests, essential laboratory physical property measurement, large scale multiple freezing-thawing cyclic salt-frost heaving tests, shear strength tests, and unconfined compressive strength tests on the samples. According to the test results presented, the collected saline soil differed from saline soil in other regions and fell into “chlorite saline soils.” As the number of freezing-thawing cycles increased, the overall salt-frost heaving capacity increased and then decreased in the freezing process but first reduced and then increased in the thawing process. Thus, the salt-frost heaving capacity was cumulative in freezing/thawing cycles. The peak salt-frost heaving capacity reached a maximum after 1 freezing-thawing cycle and then dropped drastically and fluctuated regularly. After 6 freezing-thawing cycles, the displacement deformation and time formed a new equilibrium. After 7 freezing-thawing cycles, the displacement and deformation of the soil no longer appear negative. As the number of freezing-thawing cycles increased, the cohesive force of saline soil first increased and then dropped steadily, the internal friction angle first dropped and then increased steadily, and the unconfined shear strength first increased and then decreased. These research results provided data supporting the prevention and controlling highway saline soil disasters with insightful references for the other projects in this region.

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“…[1][2][3] High water activity, small pore size, high salt content, and high solid-liquid interface energy will signicantly reduce the freezing temperature and increase the unfrozen water content in saline soil. [4][5][6] During the freezing process, the water and salt in saline soil undergo a phase transition. Considering the phase transition of ice and salt, the heat transfer equation can be calculated, and the variation of ice porosity, salt crystal porosity, and unfrozen water content can then be calculated by discretisation.…”

Section: Introductionmentioning

confidence: 99%

The effect of thermodynamic changes in the cooling of saline soils on the corrosion system of carbon steels

Dong

Feng

et al. 2022

RSC Adv.

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Pore water freezing characteristic in saline soils based on pore size distribution

Cited by 24 publications

References 48 publications

A Simplified Model for the Phase Composition Curve of Saline Soils Considering the Second Phase Transition

A Simplified Model for the Phase Composition Curve of Saline Soils Considering the Second Phase Transition

Investigation of Salt‐Frost Heaving Rules and Mechanical Properties of Chlorite Saline Soil along the Duku Highway under Freezing‐Thawing Action

The effect of thermodynamic changes in the cooling of saline soils on the corrosion system of carbon steels

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