Article
Computer Science, Interdisciplinary Applications
Can Jin, Wuxing Zhang, Pengfei Liu, Xu Yang, Markus Oeser
Summary: A method for simplifying the geometry of asphalt mixtures microstructures was proposed and evaluated for accuracy, showing stress and strain curves of simplified models were very close to original models with significantly reduced computational time. This approach allows for reliable and efficient simulation of asphalt mixtures using the FE method.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2021)
Article
Veterinary Sciences
Veronique Livet, Romain Rieger, Eric Viguier, Thibaut Cachon, Caroline Boulocher
Summary: This study aimed to investigate the micromechanical properties of the medial meniscus and evaluate the effects of regional and circumference locations. The results showed significant regional and radial variations in the stiffness and viscoelastic properties of the meniscus. Additionally, the meniscus exhibited a viscous behavior.
RESEARCH IN VETERINARY SCIENCE
(2022)
Article
Construction & Building Technology
Loay Al Khateeb, Kumar Anupam, Sandra Erkens, Tom Scarpas
Summary: This paper aims to simulate the micromechanical behavior of asphalt mixtures during the compaction process using the Discrete Element Method (DEM). The study successfully validated the model through verification process and Superpave Gyratory Compaction (SGC) test. Results showed that the temperature variation significantly affects the compactability and compaction efforts of asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Guosheng Zhang, Qiang Wang, Yue Li, Mingzhong Zhang
Summary: This study systematically investigates the evolution of phase composition, microstructure, and micro-mechanical properties of magnesium phosphate cement (MPC) and their influence on macroscopic mechanical properties. The microstructure of MPC is primarily composed of potassium magnesium phosphate hexahydrate (MKP) crystals and a hybrid region of magnesium oxide and amorphous hydration products. The elastic modulus and hardness of MKP crystals are 20.18 GPa and 1.15 GPa, respectively. The macroscopic strength of MPC is mainly determined by its pore structure rather than the micro-mechanical properties of hydration products.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Ceramics
Farayi Musharavati, Fadi Jaber, Mohamed Nasor, Masoud Sarraf, Erfan Zal Nezhad, Kaan Uzun, Ye Ma, Sungchul Bae, Ramesh Singh, Muhammad E. H. Chowdhury
Summary: This study investigated the mechanical properties, wettability, and tribology of hydroxyapatite-zirconia-carbon nanotube ceramic nanocomposites with different carbon nanotube ratios (1%, 5%, 10%). The results showed that the hardness of the materials increased with the addition of 1% and 5% carbon nanotubes, but decreased with the addition of 10% carbon nanotubes. In addition, the nanocomposite with 10% carbon nanotubes exhibited the highest hydrophilicity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
M. Yarahmadi, J. J. Roa, J. Zhang, L. Cabezas, L. Ortiz-Membrado, L. Llanes, G. Fargas
Summary: This study investigates the micromechanical properties of yttria-doped zirconia ceramics produced by Direct-Ink Writing (DIW) and Cold Isostatic Pressing (CIP). The results show that DIW samples have 20-25% lower hardness values compared to the corresponding CIP samples due to microstructural defects like porosity. However, at the local level, the hardness and elastic modulus achieved by nanoindentation are closer between printed and CIP samples.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Computer Science, Information Systems
Bin Yu, Yongzheng Zhang, Wenshu Xie, Wenjia Zuo, Yiming Zhao, Yuliang Wei
Summary: This paper introduces a statistical method using the Gaussian mixture model to detect network traffic anomalies, allowing us to learn the normal behavior of a communication process and predict whether a single communication is under attack.
Article
Materials Science, Multidisciplinary
Shawkat Imam Shakil, Leandro Gonzalez-Rovira, Leticia Cabrera-Correa, Juan de Dios Lopez-Castro, Miguel Castillo-Rodriguez, F. Javier Botana, Meysam Haghshenas
Summary: This paper presents a comprehensive investigation into the correlation between microstructural features and macroscopic properties of laser powder bed fused Scalmalloy(R). It shows that the strength of the alloy improves significantly in the heat-treated condition due to the precipitation of secondary phases; however, the grain size and texture remain relatively unchanged.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Tobias Sedlatschek, Mathias Kraemer, James S. K. -L. Gibson, Sandra Korte-Kerzel, Alexander Bezold, Christoph Broeckmann
Summary: This study measures the mechanical properties of a commercial composite LiFePO4 cathode using statistical nanoindentation and discusses the influence of surface roughness, particle size effect, and porosity on the measurements. The results show that the mechanical properties of the secondary LiFePO4 particles are significantly lower than those of bulk LiFePO4, and a dependence of Young's modulus on porosity is established.
JOURNAL OF POWER SOURCES
(2022)
Article
Construction & Building Technology
Peter J. Collins, Robert J. Thomas, Aleksandra Radlinska
Summary: This paper investigates the influence of gravity on the micromechanical properties of portland cement pastes that contain the lunar regolith simulant JSC-1A. The results suggest that gravity does not influence the mechanical properties of the hydrated phases in-situ. Additionally, insights into the potential performance of lunar regolith as a component in composite materials are provided.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Environmental Sciences
Qingsong Zhang, Zhibin Liu, Yasen Tang, Yongfeng Deng, Tingyi Luo, Yuting Wang
Summary: The mechanical properties of mudstone with different mineral compositions were evaluated using nanoindentation test and deconvolution data analysis method, and the macroscopic mechanical properties were obtained using upscaling models. The results showed that mudstone exhibited high heterogeneity, and the mechanical response of mineral compositions in the interface region was complex.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Materials Science, Coatings & Films
Peilei Zhang, Qi Zhang, Hua Yan, Zhishui Yu, Jin Yang, Jieshi Chen, Di Wu, Haichuan Shi, Yingtao Tian, Songyun Ma, Weisheng Lei
Summary: In this research, an amorphous coating of Fe-Cr-Mo-C-B-Y metallic glass was developed on a steel substrate through laser surface treatment. The microstructure and phase distribution of the coating were analyzed, as well as its mechanical properties such as microhardness and abrasion resistance. The study found that the coating thickness, microstructure, and mechanical properties were influenced by the laser parameters used during the process.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Thermodynamics
P. Cheng, C. P. Zhang, Z. Y. Ma, J. P. Zhou, D. C. Zhang, X. F. Liu, H. Chen, P. G. Ranjith
Summary: Nanoindentation tests were conducted to investigate the effects of ScCO2-water treatment on shale matrix micromechanics, revealing significant heterogeneity in the properties of different minerals. Observation of indentation morphologies showed that considerable micro-fractures were generated in clay minerals, correlated to significant plastic deformation and layered crystal structures.
Article
Construction & Building Technology
Guofang Zhao, Qizhi Wang, Zhanyou Yan
Summary: This study analyzed the mechanical evolution of asphalt mixture using meso-mechanics theory and established a 2D bending discrete-element model. The results showed that the discrete-element method can simulate discontinuous and heterogeneous materials well, revealing the mechanical evolution behavior between the particle flows of the asphalt mixture.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Materials Science, Coatings & Films
Wenxu Ran, Yanqiang Qiao, Xiping Guo
Summary: This study investigates the micromechanical properties of Al, Y-modified silicide coating on Nb-Si based alloy. It is found that the coating exhibits anisotropic elastic and plastic properties, with the hardness and elastic modulus influenced by grain orientation and defects.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Construction & Building Technology
Xueyu Pang, Lijun Sun, Min Chen, Ming Xian, Guodong Cheng, Yang Liu, Jiankun Qin
Summary: The experimental program investigated the hydration and strength development of Class G oil well cement under various curing temperatures. Results showed linear relationships between heat of hydration, non-evaporable water content, and degree of hydration, largely independent of curing temperature. Curing temperature influences hydration and strength development rates, which can be modeled using an equivalent age method.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Xiujiang Pang, Yanguang Yuan, Huanyu Liu, Xueyu Pang, Li Chen, Yuan Liu, Yawen Shi, Shaoxiang Li
Summary: In this study, polycarboxylic superplasticizer-layered double hydroxide (PCE-LDH) nanoparticles were synthesized and added to Portland cement for accelerated hydration. The addition of PCE-LDH resulted in increased compressive strength of the cement specimens. It is speculated that the PCE-LDH nanoparticles act as nucleation sites for cement hydration products, promoting nucleation reactions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xuerui Wang, Xueyu Pang, Ming Xian, Baojiang Sun, Zhiyuan Wang, Yong Ren, Yuqi Feng, Zhen Zhang
Summary: Annular pressure caused by thermal expansion during cement hydration process is studied in this paper. A kinetics model for cement hydration under different curing temperatures is proposed, and a transient temperature prediction model during well cementing is built. The prediction model of annular pressure, considering the change in cement temperature and the change in annulus volume, is established. Numerical simulations demonstrate the changing roles of transient cement hydration degree and temperature in wellbores. Suggestions and conclusions provide safety guidance for the management of annular pressure during well cementing.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Geological
Jiankun Qin, Xueyu Pang, Ashok Santra, Guodong Cheng, Hailong Li
Summary: To investigate long-term strength retrogression in oil well cement systems under high pressure and high temperature (HPHT) curing conditions, various influencing factors were studied. Results showed that ultrafine crystalline silica played a crucial role in stabilizing mechanical properties, while the addition of silica fume had a detrimental effect. Nanographene stabilized the Young's modulus but none of the studied admixtures could completely prevent the strength retrogression due to phase conversion.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Construction & Building Technology
Fang Sun, Xueyu Pang, Shiho Kawashima, Guodong Cheng, Shenglai Guo, Yuhuan Bu
Summary: This study investigated the effect of tartaric acid on the early-age hydration of oil well cement at high temperatures using isothermal calorimetry, thermogravimetric analysis, and quantitative XRD analysis. The results showed that a high dosage of tartaric acid can change the shape of the cement hydration curve and cause premature setting. Additionally, the dosage of tartaric acid also influenced the ultimate hydration extent of the cement.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Xiujiang Pang, Li Chen, Yawen Shi, Yuan Meng, Xueyu Pang, Yanguang Yuan, Yuan Liu
Summary: This study found that the use of magnesium aluminum layered double hydroxides nanosheets can improve the water resistance and compressive strength of magnesium oxychloride cement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xiujiang Pang, Huanyu Liu, Li Chen, Yanguang Yuan, Xixue Liu, Xueyu Pang, Yuan Liu
Summary: The hydration kinetics of magnesium oxysulfate cement (MOS) with and without citric acid (CA) was evaluated using isothermal calorimetry. Different experiments were conducted at 15°C and 25°C with varying MgSO4 solution-to-MgO ratios (r) and MgO activities. The study found that the effect of CA on the overall cement hydration rate can be simulated by a generalized scale factor model, depending primarily on the CA dose (w).
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Editorial Material
Materials Science, Multidisciplinary
Huajie Liu, Xueyu Pang, Ashok Santra, Jiapei Du
FRONTIERS IN MATERIALS
(2023)
Article
Construction & Building Technology
Lijun Sun, Xueyu Pang, Siavash Ghabezloo, Haige Wang, Jinsheng Sun
Summary: A comprehensive study was conducted on the hydration kinetics and engineering properties of silica-cement under varying temperature and pressure conditions. The results showed that the effect of curing temperature on hydration kinetics is complex, while pressure has a more significant influence. The heat of hydration was found to be proportional to chemical shrinkage and independent of curing temperature. The retrogression of strength in silica-cement systems is attributed to the transformation of C-S-H to xonotlite and tobermorite, accompanied by volume expansion. Increasing pressure accelerates volume expansion and phase transformation, while increasing silica dosage slows down these processes.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Fang Sun, Xueyu Pang, Jianqiang Wei, Jing Zeng, Jiacheng Niu
Summary: Understanding the synthesis process and phase interactions of Portland cement is crucial for the design and optimization of cement-based materials. This study successfully synthesized various clinker phases of cement and investigated their hydration behavior.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Michael Boniface Baragwiha, Kenedy Geofrey Fikeni, Yukun Zhao, Guodong Cheng, Han Ge, Xueyu Pang
Summary: Nanomaterials, such as Nano-SiO2 and gamma-nano-Al2O3, can enhance the rheology of cement slurry, while alpha-nano-Al2O3 and nano-TiO2 tend to reduce it. All nanomaterials can accelerate the early hydration of cement, with gamma-nano-Al2O3 having the strongest influence and Nano-SiO2 being the only one that further increases the long-term hydration heat release.
Article
Materials Science, Multidisciplinary
Hailong Li, Xueyu Pang, Siavash Ghabezloo, Jian Zhang, Xian Shi, Jiankun Qin
Summary: The mechanical behavior of a silica-enriched well cement system was investigated at various temperatures, pressures, and drying conditions. The results showed that the well cement exhibited an increase in peak strength and plasticity with increasing confining pressure under dry conditions. However, the simultaneous application of high temperature and high confining pressure resulted in reduced yield stress. The reduction of water content significantly increased the peak strength and yield stress of the well cement.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Multidisciplinary Sciences
Yuhuan Bu, Shengda Shen, Zhongguang Liu, Huajie Liu, Shenglai Guo, Xueyu Pang
Summary: With the increase of thick oil extraction, the integrity problem of well walls has become more prominent. This paper establishes a T-H-M coupled mathematical model to analyze the seal integrity of the cement ring in a hot recovery well and provides countermeasures to prevent detachment of the casing-cement ring interface.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Construction & Building Technology
Diego J. De Souza, Leandro F. M. Sanchez, Juarez Hoppe Filho, Marcelo H. F. Medeiros
Summary: This paper evaluates the physical and chemical properties of mortar mixtures with different binders and exposed to different sulphate solutions. A theoretical approach to describe the susceptibility of cementitious mixtures against sulphate attack is proposed. The results show that the amount of portlandite and the potential of ettringite formation are well correlated with the expansion and damage caused by sulphate attack.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yu Chen, Hossein Rahmani, Erik Schlangen, Og uzhan Copurog
Summary: This study presents a method to accelerate the production of limestone-calcined clay-based cementitious materials using Ca(NO3)2 solution in 3D printing, and investigates the effects of adding Ca(NO3)2 solution on the material's properties. The results show that adding Ca(NO3)2 solution can improve buildability, accelerate initial setting, and increase compressive strength.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jing Xu, Xianzhi Wang, Wu Yao, Qing Chen, Hehua Zhu, Surendra P. Shah
Summary: Concrete cracks in marine engineering are caused by the hostile seawater environment, leading to serious deterioration of infrastructures. Microbial induced carbonate precipitation (MICP) is an effective and environmentally friendly approach for self-healing of concrete cracks. However, the formation and structure of MICP products for crack healing in seawater are still unclear, which hinders the application of MICP in marine structures.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhenbo Wang, Peng Sun, Yurun Fan, Yudong Han, Yudong Hu
Summary: This study investigates the potential use of engineered cementitious composites (ECCs) with strain-hardening and self-healing characteristics as a cover material in wet coral sand exposure. The results show that ECCs can effectively close cracks, reduce water permeability, and restore the load-carrying capacity of structures. Additionally, lower strain levels are associated with decreased rebar corrosion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhengxian Yang, Xiaoli Xiong, Kang Li, Bruno Briseghella, Giuseppe Carlo Marano, Shanghong Chen
Summary: This study investigates the long-term volume stability and strength development of engineered cementitious composites (ECC) containing high-volume steel slag (SS). It is found that the strength of ECC with SS starts to decline after 90 days, while the decline is more significant compared to the matrix. The expansion of SS reduces the fracture toughness of the matrix, leading to an increase in toughness and ductility of the ECC. The introduction of ground granulated blast furnace slag (GGBFS) and PVA fibers can reduce the volume expansion and strength loss caused by SS expansion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bin Xi, Zhewen Huang, Salam Al-Obaidi, Liberato Ferrara
Summary: This study investigates the self-healing capabilities of Ultra-High Performance Concrete (UHPC) under the combined influence of mechanical and environmental factors. The results reveal that UHPC with narrow cracks exhibits a higher degree of self-healing, especially when exposed to tap water. Furthermore, prolonged exposure mitigates the inhibitory effect of aggressive ions on self-healing.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhichao Xu, Huayang Sun, Yanlin Huo, Minjie Jia, Zhitao Chen, Yingzi Yang
Summary: In this study, MXene was used to modify the surface of polyethylene fiber, improving the interfacial properties and tensile properties of strain hardening cementitious composites. The MXene-coated fiber showed increased tensile stress and strain, reduced crack width and spacing, and enhanced frictional bond strength between the fiber and matrix.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bao Lu, Yeqiang Zhou, Lei Jiang, Zhensen Liu, Guihua Hou
Summary: This study investigated the leaching rate of Ca2+ from magnesium slag (MS) and developed a leaching-carbonation method to convert MS into high-purity vaterite and supplementary cementitious materials. The wet carbonation process with glycine as a crystal modifier successfully produced spherical vaterite with high purity and surface area. The leachate solid residue (LSR) obtained from the leaching process of MS showed a smaller size destruction and higher surface area compared to Portland cement, leading to accelerated hydration process and improved compressive strength and pore structure development. This work provides a novel treatment method for MS and enables its high value-added utilization.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Gustavo Henrique Nalon, Jose Carlos Lopes Ribeiro, Leonardo Goncalves Pedroti, Roberto Marcio da Silva, Eduardo Nery Duarte de Araujo, Gustavo Emilio Soares de Lima
Summary: The mechanical behavior of mortar joints is crucial for masonry's structural performance. This study investigated the effects of different lime/cement ratios and carbon black nanoparticles content on the properties of mortars. The results showed that increasing lime content decreased mortar strength but increased self-sensing properties at the end of the percolation zone.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yifei Wang, Lei Lei, Caijun Shi
Summary: The effects of DEIPA and EDIPA at dosages of 0.02% and 0.05% on the hydration and strength development of cement-fly ash-limestone ternary blend were investigated. It was found that both dosages of DEIPA and EDIPA promote the chemical effect of limestone and the hydration of aluminates from cement and fly ash. The hydration of silicates was accelerated by 0.02% of DEIPA or EDIPA but delayed by 0.05% due to excessive aluminates hydration. DEIPA and EDIPA also refine the pore structure and increase compressive strength of the blend mortar.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Du Pan, Ditao Niu, Zongjin Li
Summary: A thick-walled cylinder model was developed in this study to analyze the cracking behavior of seawater sea-sand concrete (SSC) cover. Damage variables were introduced to determine the extent of damage for each cracked ring, and a predictive model for the cracking time of SSC cover was established. The accuracy of the model was verified using the Digital Image Correlation (DIC) technique.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiangyu Wu, Hong S. Wong, Hao Zhang, Qian Yin, Hongwen Jing, Dan Ma
Summary: This study explores a method of strengthening cemented rockfill by using well-graded gangue and partially replacing Portland cement with fly ash and a premixed low-alkalinity activator. The research investigated the effects of activator dosage and curing time on the mechanical properties, composition, and microstructure of cemented rockfill. Results show improved performance with low cement content and the use of a low-cost activator. The addition of premixed activator to fly ash enhanced the formation of specific minerals and caused densification of the microstructure. The study reveals an effective and low-cost method for recycling mining wastes and reducing cement.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Juntao Dang, Xiaosong Tang, Jianzhuang Xiao, Aihong Han
Summary: This study proposes a solution to improve the fresh stability and thermal insulation of alkali-activated foamed concrete by adding recycled brick powder. The study investigates the effects of activator modulus and Na2O concentration on the properties of alkali-activated foamed concrete with different bases. The presence of alkaline activator negatively affects the foamability and foam stability, but adjusting the activator concentration can achieve shorter initial setting time and higher fluidity loss. In addition, the increased activator concentration resulted in changes in the pore structure of the foamed concrete.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiandong Zuo, Bo Wu, Biqin Dong, Feng Xing, Jun Ma, Guanqi Wei
Summary: Nitrite ion intercalated Ca-Al and Mg-Al layered double hydroxides (LDHs) were successfully synthesized using two modified methods. The Ca-Al LDH synthesized by hydrothermal method (H-C-LDH) exhibited the best properties. The intercalated LDHs improved the mechanical properties, chloride penetration resistance, and permeability resistance of cement mortars without affecting the fluidity. Additionally, the intercalated LDHs provided better corrosion resistance.
CEMENT & CONCRETE COMPOSITES
(2024)
Review
Construction & Building Technology
Jingbin Yang, Zhenping Sun, Nele De Belie, Didier Snoeck
Summary: This review paper provides an overview of internal curing mechanism, common internal curing agents, and the most promising agent-superabsorbent polymers in alkali-activated materials (AAM) systems. The introduction of voids by internal curing agents typically has a negative impact on mechanical properties, but continuous water release during internal curing counteracts this effect by promoting hydration. While the effect of internal curing in reducing autogenous shrinkage of AAM systems has been well-established, the impact on drying shrinkage varies widely in different studies.
CEMENT & CONCRETE COMPOSITES
(2024)