Article
Chemistry, Multidisciplinary
Elena Bragar, Yakov Pronozin, Askar Zhussupbekov, Alexander Gerber, Assel Sarsembayeva, Tymarkul Muzdybayeva, Ulbossyn Zhangabilkyzy Sarabekova
Summary: The number of freezing-thawing cycles has a significant effect on the strength characteristics of soils, with cohesion largely depending on parameters such as void ratio, initial moisture content, and the number of cycles. The angle of internal friction shows an indefinite behavior during freeze-thaw cycles. These changes have a significant impact on the soil's bearing capacity.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Analytical
Qingsong Deng, Xiao Liu, Chao Zeng, Xianzhi He, Fengguang Chen, Siyu Zhang
Summary: By establishing a thermal-hydraulic-mechanical coupling model and proposing the concept of freeze-thaw damage degree based on the standard deviation of ice content, this study provides references for the design of highway subgrades in seasonally frozen soil areas.
Article
Ecology
Annelein Meisner, Basten L. Snoek, Joseph Nesme, Elizabeth Dent, Samuel Jacquiod, Aimee T. Classen, Anders Prieme
Summary: Climate change alters frequencies and intensities of soil drying-rewetting and freezing-thawing cycles, impacting soil water availability crucial for microbial activity. Experiments show that drying-rewetting cycles have stronger effects on soil microbial communities and CO2 production than freezing-thawing cycles.
Article
Engineering, Environmental
Zhengyi Wang, Mingyi Zhang, Gang Li, Weibo Liu
Summary: A mechanical model was developed to clarify the mechanisms of double-layer geomembranes in trapezoidal canals during freezing-thawing processes. The tangential and internal forces in the double-layer geomembranes canal were found to be minimal during the freezing period, while the traditional concrete canal had maximum forces. However, during the thawing period, the anti-slip canal exhibited larger forces compared to the double-layer geomembranes canal and traditional concrete canal. This study's mechanical model will benefit the design of canals in cold regions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jihun Kim, Aslan Hwanhwi Lee, Wonjae Chang
Summary: Manipulating the retention of unfrozen water in freezing contaminated soil to achieve prolonged bioremediation in cold climates has not yet been formulated. This study shows the effects of nutrient and zeolite amendments on unfrozen water retention and hydrocarbon biodegradation in field-aged, petroleum-contaminated soils undergoing seasonal freezing. Nutrients were found to be predominant during early freezing, while increased unfrozen water retention associated with added zeolite surface areas was critical in extending hydrocarbon biodegradation into the frozen phase.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Xin Jing, Zizhi Cui, ShuIng Doh, Li Ma, Lu Wei, Dong Liu
Summary: Freeze-thaw cycles have a significant impact on the physico-mechanical behaviors of soils, with the addition of bentonite effectively improving the freeze-thaw resistance of clay by influencing its shear strength and cohesion. As dry density, saturation, and bentonite content increase, the internal friction angle and cohesion of soils gradually decrease.
PHYSICS AND CHEMISTRY OF THE EARTH
(2021)
Article
Engineering, Civil
Mengqin Wang, Yan Zhu, Tianxing Zhao, Lihong Cui, Wei Mao, Ming Ye, Jingwei Wu, Jinzhong Yang
Summary: Field experiments were conducted to analyze the non-synchronized movement of soil water and salt during freezing-thawing periods, with a focus on soil salt composition and convection-diffusion theory. The results shed light on the mechanisms underlying soil water and salt dynamics in agricultural systems with shallow groundwater tables.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Environmental
Chao Liu, Claude Berard, Lijun Deng
Summary: Deep soil mixing with high cement contents in cold regions is important but not well studied. This study examined the mechanical behavior of soilcrete under freezing/thawing conditions. The results showed that the compressive and tensile strength of soilcrete increased with curing age but decreased with more freezing/thawing cycles. The lower temperature caused more severe damage and the mass loss reflected the impact of freezing/thawing cycles.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Francisco Matus, Daniela Mendoza, Francisco Najera, Carolina Merino, Yakov Kuzyakov, Kelly Wilhelm, Jens Boy, Felipe Aburto, Ignacio Jofre, Michaela A. Dippold
Summary: Antarctic King George Island is experiencing the most rapid warming in the Southern Hemisphere. This area has limited organic matter inputs, mainly from lichens, mosses, avian faeces, and two vascular plant species. This study investigated the effects of freezing and thawing cycles on the priming effect, finding that microorganisms in the soil preferentially use freeze-preserved SOC after thawing as an important energy source, leading to an intense priming effect.
Article
Engineering, Geological
Guoqing Cai, Qianqian Liu, Kunhong Li, Jun Zhang, Yi Liu, Annan Zhou
Summary: The long-term drying/wetting and freezing/thawing cycles can damage the structure of roadbed soil in loess areas, leading to engineering geological disasters. The combination of drying/wetting and freezing/thawing cycles can significantly increase the volume changes in compacted loess. Increasing dry density can reduce the deformation caused by freezing/thawing cycles. However, as the number of cycles increases, the compressibility and irrecoverable deformation of compacted loess also increase, deteriorating its engineering properties.
ENGINEERING GEOLOGY
(2023)
Review
Agriculture, Multidisciplinary
Qiyong Jiang, Zhang Min, Arun S. Mujumdar
Summary: Freezing is an effective technique for extending the storage life of food, but it can also pose challenges to the quality of the food during the freeze-thaw process. Physical field techniques, such as ultrasound, microwave, radio frequency, electric fields, magnetic fields, and high pressure, have been increasingly used to improve the quality of frozen food due to their high efficiency and ease of application. However, the application of these physical fields can also lead to negative phenomena, such as uneven temperature distribution and local overheating, which can damage the product and limit their industrial application.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Engineering, Environmental
Lassana Bakary Traore, Fabrice Rojat, Antonin Fabbri, Fionn McGregor
Summary: This paper presents an experimental study on the freezing-thawing behavior of earthen samples at different liquid saturation degrees. The results show that the freezing-thawing deformations mainly depend on the initial liquid saturation, and the freeze-thaw cycles lead to shrinkage during freezing and expansion during thawing. Axial loading and freezing-thawing have a combined effect on deformations in unsaturated earthen materials.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Rui Zhu, Zhengyin Cai, Yinghao Huang, Chen Zhang, Wanli Guo, Yi Wang
Summary: This study investigated the effects of wetting-drying-freezing-thawing cycles on the mechanical properties of expansive soil through triaxial tests. The results showed that WDFT cycles significantly impacted the mechanical properties of expansive soil, leading to decreases in various parameters. Damage variables of specimens increased with rising WDFT cycles, but tended to stabilize after the 3rd cycle.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Zening Wei, Wei Yang, Cheng Zhai, Yong Sun, Wei Tang, Aikun Chen, Hexiang Xu, Yu Wang
Summary: Granular materials in high-latitude cold and high-altitude areas can be damaged by freezing and thawing, due to changes in microscopic pore structure and moisture content. This study investigated the unfrozen water change and storage characteristics of granular materials under freeze-thaw cycles. The results showed that the freezing characteristic curve exhibited an exponential decrease and a left-bottom shift with an increasing number of cycles, indicating a more developed pore space. Freeze-thaw cycles intensified the hysteresis phenomenon and caused pore expansion in the early freeze-thaw period. The study also observed the destruction of weak surface structures through frost heave and water migration erosion, leading to granular accumulation instability.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Polymer Science
Hiroyuki Takeno, Ryuki Hashimoto, Yunqiao Lu, Wen-Chuan Hsieh
Summary: This study utilized SAXS/WAXS techniques to investigate the aggregated structures of konjac glucomannan (GM) gels during the freezing-thawing process. The findings revealed that freezing-thawing treatment increased GM crystallization and compressive stress, while the gel network enhanced the inhomogeneity due to ice crystal growth. Additives such as PVA and AFGP suppressed crystallization but did not prevent ice crystal growth and inhomogeneity of the gel network.
Article
Engineering, Environmental
Wang Miao, Meng Shangjiu, Yuan Xiaoming, Sun Yiqiang, Zhou Jian
COLD REGIONS SCIENCE AND TECHNOLOGY
(2018)
Article
Construction & Building Technology
Shangjiu Meng, Yiqiang Sun, Miao Wang
STRUCTURAL CONTROL & HEALTH MONITORING
(2020)
Article
Engineering, Environmental
Yiqiang Sun, Shangjiu Meng, Miao Wang, Hailong Mu, Xingchen Tang
Summary: Research on freeze-thaw and triaxial tests of roadbed clay revealed that failure strength and cohesion of freeze-thaw soil decrease considerably with dropped freezing temperature, increasing moisture content, and improved compaction degree. The change in friction angle was less remarkable and exhibited an opposite trend with freezing temperature and compaction degree. After the initial freeze-thaw cycles, there was a reduction in failure strength and cohesion, followed by a plateau, while the friction angle initially decreased and then recovered to a value higher than unfrozen soil.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Shangjiu Meng, Hailong Mu, Miao Wang, Wenhan Yang, Yang Liu, Yiqiang Sun, Xiaoming Yuan
Summary: This study compares and analyzes the ground motion characteristics of natural and mine earthquakes in the Hegang area, and selects key identification parameters to propose a new comprehensive gradient discriminant method. The method can accurately identify natural and mine earthquakes, providing a methodological and theoretical support for safety production and disaster warning in mining areas.
Article
Engineering, Environmental
Yiqiang Sun, Shijie Zhou, Shangjiu Meng, Miao Wang, Huiling Bai
Summary: Accurate evaluation of cumulative plastic strains in subgrade soil in seasonally frozen regions is crucial for road designs and maintenance. Cyclic triaxial tests were conducted to study the influence of freeze-thaw cycles on cumulative strain characteristics of subgrade clay. The results showed that the cumulative strain increased with the dynamic stress amplitude and the number of freeze-thaw cycles. A PSO-BP model was developed to predict the accumulative plastic strain of clay, which had good agreement with experimental data.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)