Article
Construction & Building Technology
Lu-qiang Ding, Sai K. Vanapalli, Wei-lie Zou, Zhong Han, Xie-qun Wang
Summary: This study evaluated the effects of post-compaction wetting-drying, freeze-thaw cycles, and cement content on the microstructure and mechanical properties of cement-stabilized expansive soil, and examined empirical models for predicting these properties. The research findings provide valuable insights for the design and analysis of stabilized expansive soils used as pavement subgrade under complex environmental conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Gui-tao Zhao, Zhong Han, Wei-lie Zou, Xie-qun Wang
Summary: This study investigates the influence of multiple drying-wetting, freeze-thaw, and drying-wetting-freeze-thaw cycles on the volumetric, microstructural, and shear behaviors of an expansive soil. The experimental results show that these cycles mainly affect the soil's macropores, leading to collapse, cracking, and intermediate volumetric behavior. The undrained elastic modulus, shear strength, cohesion, and friction angle decrease during the cycles and reach equilibrium after approximately 6 cycles. A normalized model was developed to describe the stress-strain curves, which showed good agreement with the experimental measurements.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Construction & Building Technology
Ahmed M. Al-Mahbashi, Tamer Elkady, Mosleh Al-Shamrani
Summary: This study investigates the effect of stress states on the hysteresis behavior of soil-water characteristic curves (SWCCs) for compacted highly expansive clay. The results show that consideration of stress states is of great importance for SWCC hysteresis in expansive clay. Hysteresis loops under a low-stress state are concentric, while hysteresis loops under a high-stress state are non-concentric with a downward shift.
Article
Construction & Building Technology
Yang Song, Qier Wu, Franck Agostini, Frederic Skoczylas, Xavier Bourbon
Summary: The study investigated the concrete shrinkage and creep under variable hydric conditions through a long-term experiment, and found that the final mass and strain of concrete were not deeply modified by introducing a rewetting phase.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Xinshan Zhuang, Benchi Yang, Heyi Jin
Summary: In this study, the dynamic properties of expansive soil under freezing-thawing cycles and weathered sand contents were analyzed through dynamic triaxial tests. The results showed that freezing-thawing has a significant impact on the dynamic performance of expansive soil. The maximum dynamic elastic modulus and the maximum dynamic stress amplitude of soil are inversely related to the number of freezing-thawing cycles. Additionally, under the same number of freeze-thaw cycles, the maximum dynamic elastic modulus and the maximum dynamic stress amplitude initially decrease and then increase with the increase in the weathered sand content. Moreover, a damage degree model considering the effects of freeze-thaw cycles and weathered sand was established, which improved the prediction of soil damage degree.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Yang Zhongnian, Xuesen Liu, Liang Zhang, Fujun Niu, Xianzhang Ling, Guoyu Li, Wei Shi
Summary: Studying the physical and mechanical properties of expansive soil under freeze-thaw cycles revealed that reinforcement can improve the dynamic shear modulus and damping ratio, inhibit compression and frost heave deformation, delay structural damage, and reduce the influence of freeze-thaw cycles on soil properties. This information can be useful for reinforcing frozen soil in cold regions and supporting fiber reinforcement methods for expansive soil.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Sanghyuck Yoon, Chansoo Jeon, Wonyoung Choi
Summary: South Korean concrete crack management standards consider cracks larger than 0.3 mm to be defects, but there is a lack of technology to reduce cracks to meet these standards. This study examines the durability characteristics of blast-furnace slag concrete with an expansion material and swelling admixtures. The use of the expansion material not only contributes to initial expansion but also maintains a drying-shrinkage reduction rate of over 40%.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Engineering, Environmental
Qi Zhang, Yingjie Xia, Jinchi Zhao, Chunan Tang, Bo Zhang
Summary: This study investigates the effect of rubber powder on the characteristics of crack evolution in expansive soil under freeze-thaw cycles in the seasonally frozen region. The results show that adding 5% rubber powder effectively reduces the complexity of crack evolution and surface crack ratios. The interlocking action of the rubber particles resists freezing tension, decreasing soil deformation and crack formation.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Construction & Building Technology
Zhongnian Yang, Zhaochi Lu, Wei Shi, Chu Wang, Xianzhang Ling, Xiu Liu, Da Guan, Zhaojie Cheng
Summary: This study investigated the dynamic properties of expansive soil-rubber (ESR) undergoing freeze-thaw cycles using temperature-controlled dynamic triaxial tests. The results showed that shear stress and dynamic shear modulus decreased and then increased with increasing number of cycles. Shear stress and dynamic shear modulus were positively correlated with confining pressure and frequency. The damping ratio of ESR decreased with increasing shear strain, and the influence of freeze-thaw cycles, confining pressure, and frequency on the damping ratio was significant. The optimal ESR damping ratio was achieved when FT=12 and RC=10%, which was 29.76% higher than that of plain expansive soil.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Environmental
Tianguo Li, Lingwei Kong, Aiguo Guo
Summary: The study investigated the deformation characteristics of expansive soil under freeze-thaw cycles with different loads using a closed-system freeze-thaw test. Results showed that loads play a key role in the deformation caused by freeze-thaw cycles, with soils under different load conditions exhibiting different deformation characteristics.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
Article
Agronomy
Wei Qi, Ce Wang, Zhanyu Zhang, Mingyi Huang, Jiahui Xu
Summary: This paper investigates the impact of drying-wetting cycles on the shrink-swell behavior of soil in farmland. The results show that the repeated cycles lead to a decrease in the height, diameter, volume, and shrinkage-swelling potential of the soil. The drying-wetting cycles significantly change the distribution of void ratio and moisture ratio in the soil. However, the impact weakens as the number of cycles increases.
Article
Engineering, Multidisciplinary
A. Yousefi, H. Jahanian, M. Azadi
Summary: This study investigated the effect of soil stabilization using nanocement and cement on resistance changes during freeze-thaw cycles. The results showed that the addition of stabilizers significantly improved the soil's resilience to freeze-thaw cycles, with nanocement performing better than cement.
Article
Mining & Mineral Processing
Shaokun Ma, Xiao Huang, Zhibo Duan, Min Ma, Yu Shao
Summary: The study examined the soil-water characteristic curves of Nanning expansive soil under multiple drying and wetting cycles, proposing a new prediction model which considers two factors. This new model overcomes the limitations of the previous model and broadens the application of the improved model through comparing fitting results and test data of different types of soil.
JOURNAL OF MINING SCIENCE
(2021)
Article
Construction & Building Technology
A. R. Estabragh, M. Babaei, A. A. Javadi
Summary: The cyclic wetting and drying tests of expansive soil with different flooding fluid, such as distilled water and glycerol solution, showed that the deformation of the soil decreased with increasing cycles. Samples flooded with glycerol solution exhibited less deformation than those with distilled water, and reached equilibrium condition in fewer cycles. Increasing the percentage of glycerol led to contracted deformation curves and convergence of wetting and drying paths to an S-shaped curve at equilibrium condition.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Engineering, Environmental
Sajad Shahsavani, Amir Hossein Vakili, Mehdi Mokhberi
Summary: The experimental investigation on the use of nanosilica and Electric Arc Furnace (EAF) slag to improve the properties of expansive soil samples showed significant improvements in soil characteristics, particularly in mitigating the negative effects of freeze-thaw cycles.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Mikael Schlumpf, Jordy Hendrikx, John Stormont, Ryan Webb
Summary: The formation of wet-snow slab avalanches is related to the liquid water content and strength of the snow layers. However, current studies disagree on this relationship and there is limited understanding of snow layers with a saturation level of θ=7% and above.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
William R. Jacobson
Summary: This study investigates the kinematics of deformation in debris bands associated with an overdeepened basin in Iceland. The research reveals the presence of multiple fabric types, suggesting a complex deformation history. Furthermore, pure shear-dominated strain was observed in an ice-free sediment ridge on the glacier surface.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shanpeng Cao, Caichu Xia, Shuwei Zhou, Yao Zhang
Summary: Precise evaluation of frost heaving force and surrounding rock plastic zone is crucial for preventing freezing damage in cold-region tunnels. This paper presents a new elastoplastic solution for tunnel frost heaving force considering double non-uniform frost heave and intermediate principal stress, which can better guide the frost resistance design of tunnels in cold regions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Sina Niazi, Aimane Najmeddine, Maryam Shakiba
Summary: This study investigates the mechanical response and damage of asphalt concrete under freezing temperatures. A coupled thermo-hydro-mechanical constitutive framework is proposed and validated through simulations and experiments. The effects of microstructural constituents on the mechanical response are also studied through parametric analysis.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Shi-chun Cai, Xiao-hua Yang, Fei Ye
Summary: A calculation method based on the Winkler foundation model is proposed for analyzing the stress and deformation in excavation support structures in seasonally frozen soil regions. The method considers various factors and has been validated to exhibit good applicability.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Guanjun Wei, Chuanjin Lei, Maoning Gao, Hongyu Zhou, Xin Li, Chaoyue Zhang
Summary: This study introduces a novel approach to improve the accuracy of deformation prediction in frozen soil areas by integrating post-processing deformation from InSAR with a frost heave model using the EnKF assimilation algorithm. Experimental results show that this approach reduces the RMSE to 0.247 mm, indicating its high feasibility and practicality.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Cheng Xu, Yugui Yang, Shanshan Hou, Hui Zhang, Chenxiang Li
Summary: This study investigates the properties and characteristics of frozen loess through nuclear magnetic resonance (NMR) tests and flexural tests. The results show that as the temperature decreases, the pore ice content in frozen loess rapidly increases, making the phase transition of residual unfrozen water difficult. The flexural strength, toughness, and roughness of the fracture surface of frozen loess vary under different freezing temperatures and water content conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Jianguo Lu, Wansheng Pei, Mingyi Zhang, Xusheng Wan, Jiacheng Zhang, Yindong Wang
Summary: This paper investigates the effects of freeze-thaw cycles and salt erosion on the mechanical and microstructural properties of concrete modified with nano-TiO2 and nano-SiO2. The results show that the added nanoparticles and environment media significantly influence the overall performance of concrete samples. The SCF has the greatest influence on degradation, and the compressive strength of NS-modified concrete is lower than that of NT-modified concrete. The optimal nanoparticles ratios for NS and NT modified concretes are 1% and 2%, respectively. Furthermore, NS modification leads to better filling effect on pore structure and larger crystals on the concrete surface compared to NT modification. In the first 90 freeze-thaw cycles, the gel micro-pores increase while the macro-pores decrease, but this trend reverses within the 90-150 cycles. This research provides important insights into the erosion and frost resistance of nano-concretes in marine and cold region engineering.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Florian McLelland, Floris van Breugel
Summary: In this study, a proof-of-concept approach for automatically assessing qualitative aspects of snow type while skiing using strain sensors is explored. The algorithm developed achieves a 97% accuracy in correctly assigning qualitative labels to different segments of a skiing trajectory. This method has the potential for improving quantitative characterization of ski performance, providing snow-specific recommendations, and developing skis with automated stiffness tuning based on snow type.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Purushottam Kumar Garg, Aparna Shukla, Mohd. Farooq Azam
Summary: This study remotely investigates 25 well-distributed glaciers in the western Himalaya and finds that these glaciers were in an overall retreating phase from 1990 to 2015. The study also reveals changes in glacier dynamics before and after 2000, including reduced terminus retreat and deglaciation rates, increased surface velocity, and the presence of more glacial lakes and supraglacial debris. The study highlights the importance of topography and local surface conditions in the heterogeneity of glacier response to climate.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Junru Chen, Shuna Feng, Lang Jia, Jiagui Hou, Miles Dyck, Xiaobin Li, Qingbai Wu, Hailong He
Summary: The heat pulse method is commonly used to measure thermal properties of frozen soil, snow, or glaciers, but the phase change caused by ice melting affects the measurement accuracy. This study observed the thermal response of ice under different heating strategies and compared numerical simulations and analytical solutions. The results showed that optimizing phase change parameters improved accuracy and the numerical method effectively improved the calculation accuracy of ice thermal conductivity.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Kazuma Fukui, Chiemi Iba
Summary: By studying the evolution of pore water pressure in brick walls during cyclic freezing and thawing, we found that the water pressure in a south facing wall increases significantly during the night in cold regions. Incomplete freeze-thaw cycles are more damaging to building materials than a monotonous repetition of complete freezing and thawing.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Yasir A. Malik, Norbert Karpen, Elmar Bonaccurso, Ilia Roisman, Jeanette Hussong, Philippe Villedieu
Summary: This study quantitatively analyzes the accretion and shedding phenomena caused by ice crystal icing on heated and non-heated surfaces. Experimental findings show the accretion threshold and shed areas under different parametric conditions. The results not only consolidate previous studies, but also identify new phenomena on unheated surfaces with mixed-phase conditions at negative wet bulb temperatures and positive wet bulb temperatures.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
Ezieddin Madi, Kevin Pope, Weimin Huang
Summary: This study experimentally investigates the impact of ice thickness on the energy required for de-icing. It is found that an increase in ice thickness at the heater's edge leads to a significant increase in de-icing duration. The results suggest that employing a correlation between ice thickness at different locations can help reduce the thermal energy needed for ice removal from airfoil or cylindrical surfaces.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Engineering, Environmental
K. Riska, R. Bridges
Summary: Understanding the properties and parameters of ice growth models is crucial for assessing the impact of ice on facilities and ship navigation. This paper investigates the theoretical formulations for ice growth and compares calculated results with measurement data. The study focuses on level sea ice growth models and their application in brash ice consolidation modeling, considering factors such as snow cover, salinity, porosity, and atmospheric boundary including wind effect. The findings contribute to a better understanding of ice growth and consolidation processes, informing modeling techniques for marine design and operations.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)