Article
Physics, Multidisciplinary
J. Stein, S. Biesenkamp, T. Cronert, T. Froehlich, J. Leist, K. Schmalzl, A. C. Komarek, M. Braden
Summary: The domain relaxation process in multiferroic TbMnO3 single crystals under different electric fields and temperatures can be described by a combination of activation law and Merz law, with just two parameters to explain the relaxation times. The domain inversion process is mainly controlled by domain wall motion, with other mechanisms causing accelerated inversion near the multiferroic transition.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Fangtong Ma, Ying Zeng, Xudong Yu, Ke Chen, Siying Ren
Summary: This study investigated the leaching behavior of potassium extracted from polyhalite ore in water. It was found that high temperatures improved the reaction rate and efficiency initially, but decreased the final leaching efficiency of potassium. The results can provide reference for parameter design and selection of leaching agents in the future.
Article
Materials Science, Multidisciplinary
R. Placeres-Jimenez, J. A. Eiras
Summary: The relationship between nonlinear dielectric permittivity and macroscopic polarization in ferroelectrics is studied using two empirical models. These models can fit experimental data and provide insights into the correlation between macroscopic response and domain structure.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Composites
Wei Xia, Hengxue Xiang, Zhe Zhou, Xiang Fei, Meifang Zhu
Summary: The researchers successfully incorporated a hybridized form-stable phase change material into polyamide 6 fibers, producing phase change fibers with smart thermal management performance. These fibers have a high enthalpy and excellent washing durability, showing promising application in intelligent thermal management clothing.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Kun Gao, Kang Du, Senmao Tian, Heng Wang, Lu Zhang, Yaxuan Guo, Bingcheng Luo, Wending Zhang, Ting Mei
Summary: Sb2S3 shows promise as a phase-change material for photonic devices in the visible and near-infrared wavebands. This study explores intermediate phase-change states and cycles durability using continuous-wave and femtosecond lasers. A double-layer model is proposed to describe intermediate states, and the cycling durability can be improved by adjusting pulse energy and number of pulses.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
S. Biesenkamp, K. Schmalzl, P. Becker, L. Bohaty, M. Braden
Summary: (English Summary:)
The multiferroic domain kinetics in (NH4)2[FeCl5(H2O)] were studied and the characteristic time scale of the multiferroic relaxation was found to be larger than in previous studies. Temperature-dependent diffraction experiments revealed the emergence of higher-order and commensurate magnetic contributions upon cooling in the multiferroic phase in zero field. Isotopes had a minor impact on the magnetic ordering, and the anharmonic modification of magnetic ordering did not affect the depinning of multiferroic domain walls or the temperature dependence of the multiferroic relaxation.
Article
Chemistry, Physical
Yahor Trambitski, Olga Kizinievic, Viktor Kizinievic
Summary: This study assesses the hygroscopic and durability properties of a clay composite with the addition of a natural polymer. The introduction of retrograded starch increases the drying rate and moisture uptake of the clay composites, while improving their durability. The modified clay samples show better hygroscopic properties and reduced hysteresis rate.
Article
Chemistry, Physical
Tuan Duc Vu, Hong Xie, Shancheng Wang, Jiangfeng Hu, Xianting Zeng, Yi Long
Summary: This study reports a new strategy to fabricate a long-life VO2 nanorod nanocomposite thermochromic smart window with a one-step method. The proposed method addresses the stability issue of VO2 material in practical applications and provides tunable solar modulation effects.
MATERIALS TODAY ENERGY
(2022)
Article
Engineering, Multidisciplinary
Yuzhan Li, Navin Kumar, Jason Hirschey, Damilola O. Akamo, Kai Li, Turnaoglu Tugba, Monojoy Goswami, Rios Orlando, Tim J. LaClair, Samuel Graham, Kyle R. Gluesenkamp
Summary: A novel salt hydrate-based phase change material (PCM) composite with high energy storage capacity, relatively higher thermal conductivity, and excellent thermal cycling stability was designed and developed. The addition of a polyelectrolyte additive, DSS salt, enhanced the thermal cycling stability by reducing phase segregation. Various graphitic materials and Borax nucleator were added to enhance the energy storage capacity and thermal conductivity. The final PCM composite exhibited significant improvements in energy storage capacity and thermal conductivity compared to pure salt hydrate, and has the potential to change the future of heating/cooling systems in building infrastructure.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Physical
Xingang Wang, Weiyu Lei, Fubing Zou, Yiwei Zhong, Guanjun Guo, Jielu Zhu
Summary: Thermochromic microcapsules with photothermal conversion properties were prepared using a melamine urea formaldehyde resin (MUF) coated ternary mixture. The microcapsules were characterized for their particle characteristics, chemical structure, heat storage properties, discoloration effect, thermal cycling durability, and photothermal conversion properties. The results showed that the microcapsules with a core material ratio of (1:3:60) exhibited the best comprehensive performance. The photothermal conversion efficiencies of these microcapsules under simulated solar irradiation were 55.4% and 72.9% for two different formulations. The heat generated through selective absorption of electromagnetic radiation caused the microcapsules to change color by altering the state of the core material.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Multidisciplinary
Wilkin Woehler, Tanja Schilling
Summary: This study investigates crystal nucleation in suspensions of hard spheres and finds that there is a significant discrepancy between experimentally observed nucleation rates and numerically computed rates at low supersaturations. By proposing an interpretation of the experimental data as a combination of nucleation and crystal growth processes, the long-standing dispute about the differing rates may be resolved.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
D. Gowthami, R. K. Sharma, Mohammad Khalid
Summary: In this study, eutectic phase change materials (EUPCM) were incorporated into MXene nanopowder to strengthen thermal properties. The existence of adequate pores in MXene structure and the physical nature of the interaction between EUPCM and MXene were validated. The addition of MXene resulted in a consistent decrease in heating and cooling time of EUPCM. Additionally, the nanocomposites exhibited durability in thermal cycling tests.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Construction & Building Technology
K. Snehal, B. B. Das, Salim Barbhuiya
Summary: The stability of cementitious mortar incorporated with phase change material (PCM) under aggressive exposure conditions was evaluated. The addition of PCM increased the rate of deterioration, but the introduction of nano-silica dosage counteracted this negative impact and sustained the thermal efficiency characteristics of the mix.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Physics, Applied
Yimin Chen, Nan Han, Fanshuo Kong, Jun-Qiang Wang, Chenjie Gu, Yixiao Gao, Guoxiang Wang, Xiang Shen
Summary: In this study, the crystallization kinetics of 7 nm thick GST films in a multilayer structure was investigated using ultrafast differential scanning calorimetry and a generalized viscosity model. A fragile-to-strong crossover transition behavior was found in the 2D confined GST ultrathin film, which is beneficial for applications in neuro-inspired in-memory computing in low-dimensional phase-change devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
S. Biesenkamp, D. Gorkov, W. Schmidt, K. Schmalzl, Y. Sidis, P. Becker, L. Bohaty, M. Braden
Summary: This study investigates the magnetic structure and multiferroic relaxation dynamics of NaFeGe2O6 using neutron scattering, revealing an additional component of magnetic moments at lower temperatures and demonstrating the reversibility of controlling spin-spiral handedness with external electric fields. The time-resolved measurements show a simple temperature and electric-field dependence of multiferroic relaxation, similar to what has been observed in TbMnO3, with the maximum speed of domain wall motion comparable to the spin-wave velocity.
Article
Computer Science, Interdisciplinary Applications
Marcin Koniorczyk, Dariusz Gawin, Bernhard A. Schrefler
COMPUTERS & STRUCTURES
(2018)
Article
Construction & Building Technology
Hubert Witkowski, Marcin Koniorczyk
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
Dalia Bednarska, Marcin Koniorczyk
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Hubert Witkowski, Marcin Koniorczyk
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Mechanics
Dariusz Gawin, Francesco Pesavento, Marcin Koniorczyk, Bernhard A. Schrefler
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2020)
Article
Construction & Building Technology
Marcin Koniorczyk, Witold Grymin, Marcin Zygmunt, Dariusz Gawin
Summary: In the decision-making process for office buildings, it is important to consider both the users' thermal comfort and minimizing energy demand. By treating material properties, comfort perception, and number of people as random variables, and using perturbation theory and transformed random variables method, the probability density function of energy demand and predicted thermal comfort can be determined. This approach shows that Gaussian randomness extends into non-symmetrical uncertainty of energy demand and predicted thermal comfort, providing a more cost-effective method compared to the Monte Carlo approach.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Dalia Bednarska, Marcin Koniorczyk, Michael Steiger
Summary: This study investigates the phase transitions of sodium sulfate-water system in the pores of sandstone and red clay brick. Three different crystallization paths were identified and the enthalpies of crystallization for sodium sulfate were estimated.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Dalia Bednarska, Alicja Wieczorek, Witold Grymin, Kalina Materak, Marcin Koniorczyk
Summary: Selecting the proper drying method is crucial for experimental research on cement-based materials. This study analyzed different drying techniques and investigated the microstructure and pore structure through differential scanning calorimetry and mercury intrusion porosimetry. The findings show that different drying methods significantly affect the pore structure and physical properties of the material.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Fuyuan Gong, Stefan Jacobsen, Pengfei Li, Zhao Wang, Koichi Maekawa, Marcin Koniorczyk
Summary: The phase change and phase equilibrium of pore water can affect many physical and mechanical behaviors of cement-based materials, and the prediction of liquid/gas/ice content during adsorption-desorption and freezing-thawing process is crucial for engineering purposes.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Kalina Materak, Alicja Wieczorek, Dalia Bednarska, Karolina Chalupka-Spiewak, Magdalena Malecka, Adam Buczkowski, Marcin Koniorczyk
Summary: The presented research investigates the application of potassium methylsiliconate (MESI) as a set-retarding admixture for cement-based materials. The study found that the addition of MESI can delay the setting time of cement, prolong the induction period of cement hydration, and delay the cement hydration at high temperatures. Additionally, MESI has a significant impact on the compressive strength of cement mortar and concrete, improving their strength. The research also revealed the influence of MESI on the microstructure and pore size distribution of cement pastes.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Iman A. N. Omrani, Waldemar Maniukiewicz, Marcin Swiatkowski, Marta Choinska Colombel, Dalia Bednarska, Marcin Koniorczyk
Summary: Sample preparation is crucial for microstructural analysis of sulfated cement paste. This research aims to identify the best preparation method that minimizes interference in phase composition and porosity analysis. Various methods were used to prepare sulfated cement pastes, and the effects on micro-analyses results were evaluated. The solvent exchange approach using cold isopropanol was found to be the optimum preparation technique.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Thermodynamics
Kalina Grabowska, Marcin Koniorczyk
Summary: The study investigated the impact of three different organosilicon compounds on Portland cement hydration, finding that these compounds, except one, can reduce the rate and amount of heat release during hydration process and significantly delay the hydration reaction. The effects of various organosilicon admixtures on the activation energy were found to be different.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Proceedings Paper
Physics, Applied
Dalia Bednarska, Alicja Wieczorek, Marcin Koniorczyk
THERMOPHYSICS 2018
(2018)
Article
Mathematics, Applied
Josef Diblik, Marek Galewski, Marcin Koniorczyk, Ewa Schmeidel
DIFFERENTIAL AND INTEGRAL EQUATIONS
(2018)
Proceedings Paper
Computer Science, Theory & Methods
Witold Grymin, Marcin Koniorczyk, Francesco Pesavento, Dariusz Gawin
COMPUTER METHODS IN MECHANICS (CMM2017)
(2018)
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)