Article
Soil Science
Hailong He, Lanmin Liu, Miles Dyck, Bingcheng Si, Jialong Lv
Summary: This study conducted a comprehensive review of available Adry models, compiled a large dataset of Adry measurements, and evaluated 48 models, all of which performed unsatisfactorily. It was suggested that models should be chosen based on the availability of soil information.
SOIL & TILLAGE RESEARCH
(2021)
Article
Thermodynamics
Yizhen Du, Ren Li, Tonghua Wu, Chengsong Yang, Lin Zhao, Guojie Hu, Yao Xiao, Shuhua Yang, Jie Ni, Junjie Ma, Jianzong Shi, Yongping Qiao
Summary: This study aims to develop a new model for predicting dry thermal conductivity across different textures of soil. Cluster analysis was used to establish the relationship between thermal conductivity and dry density based on a large dataset of soil samples. The results showed that previous models performed well in low-density soils but had significant calculation errors in high-density soils. Therefore, a new model with different calculation methods was proposed, which exhibited higher accuracy in predicting dry thermal conductivity.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Changjie Zheng, George Kouretzis, Xuanming Ding
Summary: This paper presents a mathematical model for the seismic analysis of end-bearing piles in a finite thickness homogeneous saturated soil. The seismic loading is modelled as harmonic horizontal strong motion of the rigid bedrock, generating vertically-propagating shear SH-waves. The model takes into account the energy dissipation due to relative movement between the pore fluid and the solid matrix, which affects the amplitude of high-frequency components of the strong motion and the kinematic response of the piles. The paper also identifies the soil permeability threshold for reliable results using simpler single-phase soil models.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Environmental Sciences
E. Balugani, M. W. Lubczynski, K. Metselaar
Summary: The modeling of water vapor transport through dry soil layers (DSL) faces challenges, with field experiments showing higher evaporation rates than predicted by diffusion flow. Atmospheric pressure fluctuations may induce higher evaporation rates in DSL, potentially explaining discrepancies between laboratory and field observations.
WATER RESOURCES RESEARCH
(2021)
Article
Computer Science, Interdisciplinary Applications
Jiapei Du, Annan Zhou, Shui-Long Shen, Yuhuan Bu
Summary: A novel penetration model based on fractal theory for describing the complexity of flow path in soil has been proposed, and its accuracy has been validated through experiments. The analysis results show that grout slurry tends to penetrate to a longer distance under high pump pressure, low flow rate, low consistency factor, and low fluidity index, while high dry density and small particle size of soil reduce the penetration distance.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Agronomy
Zeinab Ghasemzadeh, Misagh Parhizkar, Seyedehmina Mirmohammadmeygooni, Mahmood Shabanpour, Gareth Chalmers
Summary: This study evaluates the effects of Bacillus subtilis OSU 142 (B. subtilis) on soil physical properties and its impact on soil detachment rate (Dc) and rill erodibility (Kr) in rill erosion-prone areas of Northern Iran. The results show that the inoculated soil with B. subtilis has significantly lower Dc (-52%) and reduced Kr (-70%) compared to the uninoculated soil. Direct inoculation of B. subtilis is proposed as a new technique for improving soil physical properties and reducing soil detachment rate.
Article
Multidisciplinary Sciences
Hasan Arman, Safwan Paramban
Summary: Detailed characterization of rock physical and mechanical properties is essential for engineering applications. However, existing in-situ and laboratory tests are expensive, time consuming, and require high quality samples. This study investigates the effects of core sample diameter on the relationships between mechanical and physical properties of limestone rock.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2022)
Article
Soil Science
Dmitry Fomin, Maria Timofeeva, Olga Ovchinnikova, Ilya Valdes-Korovkin, Andrey Holub, Anna Yudina
Summary: This study aims to validate the dry sieving procedure, suggest an optimal sieving regime for different soil samples, propose a formula for calculating total sieving energy, and introduce indicators for mechanical stability of soil structure. The meta-analysis revealed that many previous studies used insufficient sieving energy, resulting in the aggregate size distribution not reaching equilibrium. A detailed protocol for soil dry sieving analysis is also provided.
SOIL & TILLAGE RESEARCH
(2021)
Article
Horticulture
Sandra Afonso, Margarida Arrobas, Manuel Angelo Rodrigues
Summary: Flooding irrigation in hops fields can lead to significant differences in soil and plant properties, but not in a continuous gradient. Soil porosity and bulk density are related to crop productivity. The small amount of lime applied did not have a significant impact on soil and plants.
Article
Engineering, Mechanical
Ch Asad Abbas, Huang Chuanzhen, Huma Hafeez, Li Binghao, Liu Hanlian
Summary: This study investigates the influence of cryogenic treatment on the machinability of aluminum-silicon carbide (Al/SiC) material. It is found that cryogenic treatment enhances the machinability of Al/SiC by reducing drill-related issues such as thrust forces, drill vibration, drill diameter, delamination, and surface roughness.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2023)
Article
Forestry
Wanzhao Li, Zheng Zhang, Xinzhou Wang, Changtong Mei, Joris Van Acker, Jan Van den Bulcke
Summary: This study investigated the compressive strength of thermally treated wood with different growth ring orientations, revealing that thermal treatment caused mass loss, shrinkage, and brittle wood tissue, affecting the failure modes of the samples.
WOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Agronomy
Huijie Gu, Liantao Liu, John R. Butnor, Hongyong Sun, Xiying Zhang, Cundong Li, Xiuwei Liu
Summary: The study found that under dry conditions, root capacitance (ECroot) was significantly reduced after root cutting, and that incorporating root tissue density and soil moisture into the prediction model can improve the accuracy of ECroot. In contrast, ECroot was less affected by root cutting under wet soil conditions, suggesting that it may not directly measure roots in these conditions.
Article
Construction & Building Technology
Ruisen Li, Yu Yan, Zhisheng Jiang, Wenzhong Zheng, Guangchao Li
Summary: This study investigated the influence of hole parameters on the development and distribution of expansive pressure in soundless chemical demolition. It was found that the dispersion degree of relative expansive pressure was positively correlated with hole diameter, negatively correlated with hole depth, and had no obvious relationship with the constraint coefficient. Additionally, the impact of hole diameter and constraint coefficient on the expansive pressure at the middle of the pipes was more significant than that of hole depth.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Forestry
Fernando Sepliarsky, Luis Acuna, Jose-Antonio Balmori, Roberto D. Martinez, Eleana Spavento, Gabriel Keil, Milagros Casado, Pablo Martin-Ramos
Summary: Hardness is a crucial mechanical property for flooring materials. This study examined the performance of veneer floorings with a top layer thickness of 0.6 mm, comparing them with traditional engineered wood floorings (3 mm top layer) and solid wood floorings. The results showed that engineered wood floorings exhibited better response in terms of both footprint diameter (FD) and indentation depth (ID) compared to solid wood floorings. Additionally, the veneer floorings (0.6 mm) demonstrated superior behavior compared to traditional engineered wood floorings (3.0 mm). Furthermore, the two fast-growing hardwood species tested showed similar behavior to traditional hardwoods, indicating their suitability for the wood flooring industry.
Article
Construction & Building Technology
Ming-Jie Jiang, Huo-Liang Xie, Chao-Rong Fang, Ke-Xin Zhang, Jun-Gao Zhu
Summary: The influence of initial dry density on the coefficient of earth pressure at rest (K-0) in coarse-grained soil was investigated. It was found that the K-0 decreases with an increase in vertical stress and has a negative linear relationship with the initial dry density. A comparative analysis between different types of coarse-grained soils indicated the applicability of the proposed empirical equation for any type of coarse-grained soil.
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)