Article
Construction & Building Technology
Kaiqiang Liu, Xuesong Yang, Hua Zhang, Shun Yao, Ziling Huang, Xueni Zhang, Quan Cao, Bin Li, Zeng Luo, Xiaowei Cheng, Zhaoliang Yang, Chongrong Chi
Summary: This study developed an in situ evaluation method for the pore connectivity of cement slurry, which can investigate its porosity, pore size, and pore connectivity. The experimental results showed that the porosity and pore size of the cement slurry changed during hydration, while the pore connectivity was reduced by the presence of SiO4 species.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xiaobin Wei, Dongqing Li, Feng Ming, Chengsong Yang, Lei Chen, Yuhang Liu
Summary: This study investigated the effects of low-temperature curing on the mechanical properties, hydration process, hydration products, pore characteristics, and microstructure of alkali activated FA and GGBFS mortar. The results showed that low-temperature curing decreased the compressive strength, delayed the hydration process, and resulted in the formation of harmful pores in the alkali activated mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jianpeng Liu, Wenchang Zhang, Chang Cheng, Juncheng Zhu, Tianle Wang, Kun Ni, Zifeng Lin, Zefeng Guan, Yanwu Zhu, Jiliang Zhu
Summary: This study presents a rapid reduction method for graphene oxide (GO) by bringing GO foam into contact with semi-molten metals such as tin (Sn) and lithium (Li). The electrical resistance of GO foam is significantly reduced by its interaction with these metals, even in dry air. By employing tin foil and calcination, the rGO with remarkably lower electrical resistivity is fabricated, demonstrating its potential as an electrode material for lithium-sulfur batteries.
Article
Engineering, Electrical & Electronic
Thomas Anita Jones Mary Pushpa, Jebaraj David Raja Selvam, Isaac Dinaharan, Eby Peter
Summary: This study produced SiC and Al2O3 particulates using an in situ reaction system, and analyzed the in situ-fabricated AMCs. The results showed that SiC and Al2O3 particulates were distributed along the intergranular region in the AMCs, and the synthesis of submicron-level particulates enhanced the mechanical properties of the composites. Moreover, the hybrid AMCs exhibited considerable electromagnetic shielding effectiveness.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Dmytro S. Kozak, Vladimir S. Tsepelev, Viktor V. Konaskov, Viktor V. Vyukhin, Vladislav Y. Zadorozhnyy, Andrey Bazlov, Askar R. Kvaratskheliya, Andrey A. Tsarkov, Jan F. M. Van Impe
Summary: The study investigated the physical properties of Fe48Cr15Mo14C15B6Y2 alloy in liquid state at high temperature. It found that the alloy's viscosity, electrical resistivity, and density decrease with temperature up to 1700 degrees C, with an abnormal increase in viscosity noted in the temperature range from 1360 to 1550 degrees C. Measurements of electrical resistivity and density did not show any anomalies in the same temperature range.
Article
Materials Science, Multidisciplinary
Shashi Mohan Rao Varukuti, K. N. Chaithanya Kumar, K. S. Suresh
Summary: This study elucidates the importance of rolling temperature on grain refinement in TiNiCu shape memory alloys, where lower rolling temperature leads to coarser grain size.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Mingwang Xie, Pengfei Zhou, Wei Huang, Huiming Chen, Liukui Gong, Weibin Xie, Hang Wang, Bin Yang
Summary: The precipitation behavior and microstructural evolution of a Cu-15 wt%Ag alloy were studied during annealing. Continuous and discontinuous precipitation occurred simultaneously, accompanied by recovery and recrystallization. The strength and electrical resistivity decreased due to these changes. Controlling annealing conditions reduced dislocation density and solute atom concentration, weakening scattering effects. Nanoscale Ag precipitates from continuous precipitation provided stronger precipitation strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Jun Zhao, Zheyu Fang, Xing Jin, Dong Wang, Xiang Ding, Songlin Ran
Summary: B4C-15 vol% TiB2 composites were prepared by in situ reactive spark plasma sintering method using B4C, TiC, and amorphous B powders. The size coupling of B4C and TiC particles was optimized to achieve enhanced microstructure and properties of B4C-TiB2 composites. During the reactive sintering, fine B4C-TiB2 particles were first formed, followed by growth of large B4C particles and interconnection of in situ TiB2 grains to form an intergranular TiB2 network. The B4C-15 vol% TiB2 composite prepared from 3.12 μm B4C powder and 0.80 μm TiC powder exhibited optimal comprehensive properties, including high relative density, Vickers hardness, flexural strength, fracture toughness, and electrical resistivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
David C. Fairchild, Mohammad Hossain, Jesus Cordova, T. Grant Glover, Fernando J. Uribe-Romo
Summary: The successful separation of xenon and krypton using metal-organic frameworks relies on the polarizability of functional groups for increased xenon uptake, while selectivity is more related to pore-steric effects.
ACS MATERIALS LETTERS
(2021)
Article
Construction & Building Technology
Luca Montanari, Michelle Helsel, Igor de la Varga, Robert Spragg, Maria Juenger
Summary: Electrical resistivity is a reliable tool for evaluating the transport properties of concrete. The influence of accelerating admixtures on the electrical properties of concrete decreases over time. Electrical resistivity and formation factor are highly correlated with the porosity of concrete systems with and without accelerating admixtures.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Ceramics
Tsukaho Yahagi, Daisuke Kawai, Takuma Takahashi, Motoyuki Iijima, Junichi Tatami
Summary: This study investigated the electrical resistivity of Si3N4 ceramics with Yb2O3 additive by applying various voltages at different temperatures. The addition of Yb2O3 led to a lower resistivity in the Si3N4 ceramics, which decreased with increasing temperature and applied voltage. Hopping conduction through the J-phase was found to be the main reason for the decrease in resistivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Multidisciplinary
Elzbieta Janowska-Renkas, Mariusz Zdrojek, Michal Koziol, Agnieszka Kaliciak-Kownacka
Summary: The aim of this study was to obtain a geopolymer composite with semi-conductive or conductive properties to control abnormal symptoms caused by microstructural damages. The effects of different content of fly ash, waste glass powder, graphene, and hydrophilic and hydrophobic nanosilica on the electrical, physical, and mechanical properties were tested. The results showed that geopolymer composites containing fly ash, graphene, and hydrophobic nanosilica exhibited the most favorable electrical charge conductivity parameters and highest strength gain.
Article
Engineering, Electrical & Electronic
A. A. El-Daly, A. A. Ibrahiem, N. A. M. Eid
Summary: The addition of MWCNTs improved the microstructure of the Sn-1.0Ag-0.7Cu composite solder, reduced the electrical resistivity, and increased both strength and ductility.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Harshita Trivedi, Zohreh Ghorannevis, Avanish Singh Parmar
Summary: The research found that increasing RF power led to larger grain size, decreased resistivity, and improved electrical properties in Mo-Ni thin films. Additionally, increasing deposition time improved structural crystallinity and resistivity, making Mo-Ni bilayer film an ideal back contact material for thin-film solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
S. Sibilia, F. Bertocchi, S. Chiodini, F. Cristiano, L. Ferrigno, G. Giovinco, A. Maffucci
Summary: This paper investigates the temperature dependence of the electrical resistivity of low-cost commercial graphene-based strips, finding a linear trend and negative temperature coefficient in a wide temperature range. The derived analytical model of temperature-dependent resistivity is validated for heating applications using the graphene strips. These materials can potentially be used as thermistors in sensing or heating applications.
Article
Construction & Building Technology
Snigdha Sharma, Divya Susan, N. C. Kothiyal, Ramanjit Kaur
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Engineering, Chemical
Ramanjit Kaur, N. C. Kothiyal, Jasman Sing
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2020)
Article
Construction & Building Technology
Ramanjit Kaur, N. C. Kothiyal
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Biotechnology & Applied Microbiology
Vaneet Kumar, N. C. Kothiyal, Ying Liu, Saruchi, Dinesh Pathak
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2019)
Article
Construction & Building Technology
Ramanjit Kaur, N. C. Kothiyal, Himanshu Arora
JOURNAL OF BUILDING ENGINEERING
(2020)
Article
Engineering, Chemical
Ramanjit Kaur, N. C. Kothiyal
Summary: The current study found that the use of FCNT@GO hybrid can significantly improve the compressive and split tensile strength of cement mortars, with a more remarkable enhancement in compressive strength, especially at a dosage of 0.16%. Additionally, the synergic effect of fly ash and carbon nanomaterials in the mortar sample led to better production of hydration products and densification of the cement-FA matrix, as observed in FE-SEM and XRD studies.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
S. Kaur, B. Kumar, P. Chakraborty, V Kumar, N. C. Kothiyal
Summary: This study aimed to assess the sources, toxicity, and health risks of PAHs via inhalation of PM10 in a tropical city in northwest India. The results indicated that the inhalation cancer risks for both adults and children were within acceptable limits, although the total daily intake of PAHs and cancer risks could not be estimated due to limitations in inhalation exposure and data on dietary exposure.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
N. C. Kothiyal, Kumar Vaneet, Kumar Naresh, Saruchi, Pandey Sadanand, Sabah Ansar
Summary: The aim of this research was to reduce 16 carcinogenic polycyclic aromatic hydrocarbons (PAHs) emitted from petrodiesel engine exhaust by blending green diesel with various biodiesel fuels. The study found that blending Jatropha oil green diesel with diesel significantly reduced the concentration of almost all PAHs.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Review
Environmental Sciences
N. C. Kothiyal, Abhay, L. Khan, V Kumar, Saruchi, S. Singh
Summary: This paper reviews the generation, analysis, and remediation approaches of Polycyclic Aromatic Hydrocarbons (PAHs) and discusses their chemistry, exposure routes, and health implications. The study also briefly explores future research scope and methods for reducing carcinogenic PAHs. Understanding and reducing PAHs is vital for human health and addressing air pollution issues.
GLOBAL NEST JOURNAL
(2022)
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)
