Article
Chemistry, Physical
Mingyan Liu, Xuancang Wang, Yuyuan Deng, Yuchen Guo, Jing Zhao, Meixin Li
Summary: This study proposed a method to improve the efficiency of microwave deicing by using microwave-absorbing materials, and determined the optimal combination of pavement surface structure, microwave-absorbing material content, microwave power, shielding state, and dry and wet conditions. The results showed that under specific conditions, the use of 7000W power, 60% magnetite content, scattered microwave-absorbing surface, shielding layer at the bottom surface, and wet conditions can greatly improve the efficiency of microwave deicing compared to other materials and plain concrete.
Article
Chemistry, Physical
Yuyuan Deng, Xuancang Wang, Lv Chen, Mingyan Liu, Maohong Gao, Jing Zhao
Summary: Road icing in winter poses challenges to traffic safety. Microwave heating and deicing technology, using magnetite powder and aggregate, significantly enhance the heating performance of asphalt mixtures. The heating efficiency is influenced by the microwave power, heating time, thickness of the mixtures, initial temperature, and ice layer thickness.
Article
Materials Science, Ceramics
Xiaojun Chen, Hongyang Liu, Dechao Hu, Huaqing Liu, Wenshi Ma
Summary: Carbon nanotubes have emerged as a potential candidate to address issues related to electromagnetic pollution and interference, offering advantages like high dielectric loss and remarkable thermodynamic stability. Recent advances in CNTs-based microwave absorbing materials have shown promising prospects, particularly in the development of composites for better microwave absorption capabilities.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Le Jin, Jiqi Wang, Fei Wu, Yanan Yin, Baoliang Zhang
Summary: In this study, two MXene-based magnetic composites were innovatively fabricated and a high efficiency microwave absorbing system was obtained by blending these composites with the optimal ratio. The microwave absorbing mechanism mainly includes dielectric loss, magnetic loss, multiple reflection, and conductive loss.
Article
Construction & Building Technology
Song Lu, Erlei Bai, Jinyu Xu, Jialin Chen
Summary: The addition of carbon fiber can effectively improve the efficiency of concrete road microwave deicing, and CFMC-1 shows the best application prospects with good heating rate and reflection properties.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Jian Cheng, Zehua Zhang, Yueting Wang, Fuwei Li, Jinle Cao, Michael Gozin, Yinghua Ye, Ruiqi Shen
Summary: In this study, Ti3C2 MXene was introduced into Al/CuO energetic nanocomposites as a microwave susceptor, effectively reducing the power required for microwave ignition and shortening the ignition delay time. Additionally, the presence of MXene modulated the heat release, gas production, and combustion performance of the composites, enhancing the safety, flexibility, and adaptability of the new nanothermites to various operational requirements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xiaoming Liu, Fei Chang, Yu Zhao
Summary: To improve the utilization efficiency and deicing efficiency of microwave heating, a ultra-thin microwave-absorbing wear layer (UML) was prepared by using silicon carbide (SiC)-replaced aggregates in asphalt mixtures. The UML with a thickness of 10 mm can melt a 2 mm ice layer within 52 seconds at -20 degrees C and rated power. The particle size and content of SiC in the UML are found to affect the temperature rise rate and deicing time.
Article
Materials Science, Ceramics
Peng Wu, Wenting He, Hongbo Guo
Summary: A novel microwave absorbing material, sodium cobaltates (Na0.78CoO2), with a lamellar structure, was synthesized and showed good electromagnetic attenuate property. The composite with 50 wt% Na0.78CoO2 and 50 wt% paraffin achieved a minimum reflection loss (RL) of around -51.7 dB at a frequency of 8.2 GHz when the thickness was about 2.41 mm. Its effective absorbing bandwidths (RL <-10 dB) were in the range of 12.5 to 15.6 GHz for a sample thickness of around 1.5 mm. The electromagnetic attenuation mechanisms of the composite were related to conductive loss, multiple reflection loss, and dipole or interfacial polarization loss.
CERAMICS INTERNATIONAL
(2022)
Review
Chemistry, Multidisciplinary
Yu Gao, Yuzhi Liu, Donglei Zou
Summary: This article reviews the application of microwave irradiation in synthesis and catalytic oxidation, including microwave irradiation alone, microwave with catalysts, microwave-Fenton, microwave-peralcohol, microwave-photochemistry, microwave-electrochemistry, and microwave-sonochemistry. Engineering for upscaling microwave irradiation is also presented.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Huifang Pang, Rakesh P. Sahu, Jia Liu, Yuanyuan Fu, Lingxi Huang, Yuping Duan, Ishwar K. Puri
Summary: By assembling magnetic and dielectric materials around carbon nanotubes, materials with high microwave absorbing properties can be achieved. The hierarchical multi-layered structure increases interface area and rearranges magnetic particles, leading to enhanced microwave absorption performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Huifang Pang, Yuping Duan, Lingxi Huang, Lulu Song, Jia Liu, Tuo Zhang, Xuan Yang, Jiangyong Liu, Xinran Ma, Jingru Di, Xiaoji Liu
Summary: MAMs were initially developed in the early 20th century for military purposes, but are now widely used in various aspects of human life to prevent radiation and interference. These materials, including alloys, metal oxides, and carbon materials, have high temperature resistance and infrared stealth performance.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Haitang Yang, Yun Tan, Yanwei Zhang, Yihang Xiong, Gaosheng Nie, Heng Luo, Pei He, Junliang Yang, Xiangguo Zhao, Jinchao Tong, Yi Zhang
Summary: Maintaining dynamic microwave synchronization between a target and its background is crucial for achieving electromagnetic invisibility in real environments. This study introduces a paradigmatic example of ultra-elastic films made of graphene-functionalized ionic gel, which exhibit tunable microwave-absorbing behaviors. By changing the shape of a 3D wrinkled structure with ridge walls of moderate impedance, the reflected wave can be minimized and energy attenuation can be promoted. Experimental and finite element simulations demonstrate an optimal RL value of -43.6 dB and a valid regulatory amplitude of 41.5 dB, covering a range from microwave-absorbing to shielding state.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Pin Zhang, Yao Yao, Wenke Zhou, Yawen Liu, Xiaowei Cao, Zhi Zhang
Summary: This study explores a new composite absorbing material based on reduced graphene oxide and NiMnO3, which significantly improves the electromagnetic wave dissipation ability and impedance matching ratio. It achieves full coverage of electromagnetic waves and is an ideal material for electromagnetic wave protection.
Article
Engineering, Chemical
Pengfei Zhao, Chenhui Liu, Chandrasekar Srinivasakannan, Libo Zhang, Fang Wang, Jiyun Gao
Summary: The dielectric properties and heating characteristics of stibnite concentrate and pure antimony compounds were evaluated, showing differences in performance during microwave heating. Based on XRD and SEM-EDS results, a theoretical basis for microwave selective roasting stibnite concentrate to produce antimony oxide powder was proposed.
Article
Materials Science, Ceramics
Zhaoning Yang, Miao Sun, Junwei Li, Qian Zhou, Wei Ren, Yanmin Jia
Summary: The ZrO2/Al2O3 ceramic fabricated using 3D plasma spraying technology showed promising microwave-absorbing performance, especially in enhancing absorption intensity and bandwidth during coupling with the KNN film. The study results revealed the significant role of the structural parameters of KNN film in improving the performance of the RAS.
CERAMICS INTERNATIONAL
(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)
