Article
Construction & Building Technology
Carlos Rivera-Gomez, Carmen Galan-Marin, Victoria P. Lopez-Cabeza, Eduardo Diz-Mellado
Summary: The research investigates the engineering properties of a new earthen building material, which consists of compressed earth blocks stabilised with natural polymers and wool fibers. Experimental study shows significant improvement in mechanical, thermal, and acoustic performances compared to traditional compressed earth blocks.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Geosciences, Multidisciplinary
Nguyet Thi Anh Nguyen, Duong Nguyen-Thuy, Huong Nguyen-Van, Nam Nguyen-Hai, Arndt Schimmelmann
Summary: Research has shown that thoron isotopes and metallic progeny from unfired-soil building materials in earthen dwellings can pose a higher risk of lung cancer. Results indicate that the thoron exhalation rate from mud surfaces is influenced by the content of radioactive parental nuclides, moisture content, and dry mud density. Additionally, indoor thoron exhalation from mud walls is affected by seasonal and weather conditions, with increased geohazard exposure in cooler temperatures, low VPD, and high humidity.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Xuan Huang, Chen Li, Xiaomeng Sun, Wanying Li
Summary: China, as an ancient civilization, has a rich cultural heritage, with ancient cultural sites being a significant component. The protection of these sites in the humid environment remains a crucial topic. This article explores the use of composite nano-calcium-based materials for reinforcement and protection of soil sites in humid environments. The research includes conceptual, descriptive, and analytical studies, demonstrating the feasibility of these materials for wet site soil strengthening through practical experiments. The results indicate that the composite nano-calcium matrix with a solid content of 0.4% exhibits better salt and alkali resistance and improved compressive strength growth rate.
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Jeffrey Knowles, Yifei Ma, T. Matthew Evans
Summary: This study presents a new polyhedral reinforced interior shell model (PRISM) based on the discrete element method (DEM) for simulating collisions between polyhedral particles. The proposed model has advantages in terms of computational efficiency and the ability to incorporate inhomogeneous properties at particle-scale. Validation through simulations suggests improved efficiency and efficacy in modeling polyhedral particles with realistic geometric and physical properties.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Yeong-Man Kwon, Jun-Ho Moon, Gye-Chun Cho, Young-Uk Kim, Ilhan Chang
Summary: This study investigates the potential of using xanthan gum biopolymer for internal erosion control in earthen embankments. The laboratory tests demonstrate that a 1% xanthan gum treatment enhances the plasticity and mechanical strength of the soil, effectively preventing internal erosion. Full-scale embankment tests reveal that untreated soil erodes rapidly within 1,500 s, while the 1% xanthan gum treated soil retains its stability without significant erosion until 2,500 s.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Geological
Rohini Kolapalli, Md Mizanur Rahman, Md Rajibul Karim, Hoang Bao Khoi Nguyen
Summary: Cyclic liquefaction failure modes are directly related to the consequence of liquefaction and important for mitigation strategies. Two common failure modes, cyclic mobility (CM) and cyclic instability (CI), are well reported in the literature. However, recent experimental studies revealed three other failure modes, i.e. plastic strain accumulation (PSA) and two hybrid failures: CI followed by CM and CI followed by PSA.
Article
Computer Science, Interdisciplinary Applications
Jose Leon Gonzalez Acosta, Philip J. Vardon, Michael A. Hicks
Summary: An implicit contact algorithm for the material point method has been developed, allowing for simulation of large-scale deformations and interaction with external bodies. The method's performance has been compared to an existing explicit method, showing convergence to the analytical solution with a time step around ten times larger than the explicit method. However, during the contact phase, this may not necessarily result in faster computation due to the iterative solution procedure.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Thermodynamics
Yuqi Liu, Moyun Kang, Wei Lin, Chenchen Liang, Yapeng Wang, Feng Zhang, Jiaji Cheng
Summary: Leakage, low thermal conductivity, and flammability are the limitations of organic phase change materials (PCM). In this study, a nanocomposite PCM (HNTs-PCM) was prepared using a blending method by dispersing halloysite nanotubes (HNTs) in capric acid (CA) with different mass fraction loadings. The addition of HNTs improved the thermal energy storage efficiency of PCM and reduced the melting and setting time. The HNTs also enhanced the flame-retardant properties of PCM and restrained the heat and smoke release during combustion.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Green & Sustainable Science & Technology
Zhuolong Jia, Changgen Yan, Bo Li, Han Bao, Hengxing Lan, Zherui Liang, Yuling Shi, Jing Ren
Summary: During the rainy season on the China Loess Plateau, Guar gum (GG) is used to stabilize loess slopes and control erosion. Lab experiments showed that GG can effectively improve the mechanical and hydraulic properties of loess, with the best results obtained at a GG content of 1.0%.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Geological
Shuang Li, Ming Huang, Mingjuan Cui, Qiwu Jiang, Kai Xu
Summary: This study investigated the enhancement of thermal conductivity of steel slag and granite residual soil using enzyme-induced carbonate precipitation (EICP) methodology. The results showed significant improvement in thermal conductivity after EICP treatment. Microstructure analysis revealed the heat transfer mechanism and discussed the different ratios of thermal conductivity due to different patterns of CaCO3 crystal precipitation.
Article
Archaeology
Jin Dong, Xiaobin Liu
Summary: A study shows that sucrose-modified enzyme-induced calcium carbonate precipitation (EICP) technology can enhance the surface hardness, salt corrosion resistance, weather resistance, and water repellency of tabia samples. Sucrose regulates the morphology of calcium carbonate crystals, provides nucleation sites for them, and promotes their accumulation and cementation through viscosity, resulting in the formation of a dense protective layer on the surface of tabia.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Physics, Multidisciplinary
Qiu Zi-Yang, Chen Yan, Qiu Xiang-Gang
Summary: This study presents a detailed infrared optical spectrum of the new topological material BaMnSb2, showing changes in carrier density with temperature and the presence of a surface state in the optical conductivity.
ACTA PHYSICA SINICA
(2022)
Article
Multidisciplinary Sciences
Seok Yoon, Jun-Seo Jeon, Gi-Jun Lee
Summary: Bentonite buffer materials play a crucial role in the disposal of high-level radioactive waste from nuclear power generation. This study evaluated the hydraulic properties of Gyeongju (KJ) bentonite buffer material at temperatures above 100°C to increase its target temperature. Experimental measurements were carried out to determine the soil-water characteristic curve (SWCC) and hydraulic conductivity of the KJ bentonite buffer material. The results showed that the suction decreased and hydraulic conductivity increased nonlinearly as the temperature increased to 149°C.
Article
Environmental Sciences
Hao Zeng, Chao-Sheng Tang, Cheng Zhu, Qing Cheng, Zong-ze Lin, Bin Shi
Summary: Soil desiccation cracking is a significant concern in various fields, and this study utilizes infrared thermal imaging to investigate the correlation between soil temperature and cracking behaviors, providing insights into the underlying mechanisms of soil cracking.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Manufacturing
Min-Gu Han, Seung-Hwan Chang
Summary: The compressive characteristics of egg-box energy-absorbing cores composed of plain-weave carbon/epoxy composites were analyzed via finite-element analysis and experimentally validated. The simulation technique successfully predicted the crushing behavior of the egg-box energy-absorbing core, and the corresponding failure mode under compression was estimated successfully.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)