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Liquid-solid grinding system:Grinding kinetics of coal fly ash as ultrafine supplementary cementitious materials

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Particuology 2024年第11期94卷 109-119页

作者： Jin Yang Yong Huang Xingyang He Ying Su Tao Huang bohumír Strnadel School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan430068China Building Waterproof Engineering and Technology research Center of Hubei Province Hubei University of TechnologyWuhan430068China Center of Advanced Innovation Technologies VŠB-Technical University of Ostrava70833 Ostrava-PorubaCzech Republic

Wet-milling in liquid-solid system can achieve ultra-fine mechanical dissociation of solid wastes with low energy consumption,thereby efficiently improving the potential pozzolanic ***,the wet-milling kinetics of ultrafine dissociation in liquid-solid system has not been fully *** paper systematically investigates the wet-milling kinetics of fly ash(FA).results showed that before wet-milling of FA for 360 min,no agglomeration effect was *** particle dissociation of FA during wet-milling can be divided into three stages:rapid dissociation,slow dissociation and *** evolution process of particle size distribution during wet-milling is consistent with the rosin-rammler-Bennet *** the particle uniformity coefficient and fractal dimension showed highly positive linear correlation with the strength activity index of wet-milled *** grey correlation analysis showed that FA particles between 1.1 and 3.1μm had the greatest impact on both the early and late strength activity ***,D10 of wet-milled FA has the largest impact on strength activity index at each age,while D100 has the least ***,D10 and proportion of particles in 1.1–3.1μm can be an important basis for judging the reactivity of wet-milled FA as ultrafine supplementary cementitious materials.

关键词： Wet-milling Liquid-solid system Grey correlational analysis Fly ash Ultrafine supplementary cementitious materials

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Fluid Dynamics & Materials Processing 2024年第9期20卷 2077-2090页

作者： Jin Yang Senye Liu Xingyang He Ying Su Jingyi Zeng bohumír Strnadel School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan430068China Building Waterproof Engineering and Technology research Center of Hubei Province Hubei University of TechnologyWuhan430068China Center of Advanced Innovation Technologies VŠB-Technical University of Ostrava70833 Ostrava-PorubaCzech Republic

Phosphate tailings are usually used as backfill material in order to recycle tailings *** study considers the effect of the mix proportions of clinker-free binders on the fluidity,compressive strength and other key performances of cementitious backfill materials based on phosphate *** particular,three solid wastes,phosphogypsum(PG),semi-aqueous phosphogypsum(HPG)and calcium carbide slag(CS),were selected to activate wet ground granulated blast furnace slag(WGGBS)and three different phosphate tailings backfill materials were ***,rheology,settling ratio,compressive strength,water resistance and ion leaching behavior of backfill materials were *** to the results,when either PG or HPG is used as the sole activator,the fluidity properties of the materials are *** tailings backfill material activated with PG present the largest fluidity and the lowest yield ***,the backfill material’s compressive strength is considerably increased to 2.9 MPa at 28 days after WGGBS activation using a mix of HPG and CS,all with a settling ratio of only 1.15 ***,all the three ratios of binder have obvious solidification effects on heavy metal ions Cu and Zn,and P in phosphate tailings.

关键词： Fluidity rheology compressive strength phosphate tailing backfill material

Physico-chemical Characteristics of Wet-milled Ultrafine-granulated Phosphorus Slag as a Supplementary Cementitious Material

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Journal of Wuhan University of Technology(Materials Science) 2018年第3期33卷 625-633页

作者：贺行洋 YE Qing YANG Jin DAI Fei SU Ying WANG Yingbin bohumír Strnadel Building Waterproof Engineering and Technology research Center of Hubei Province Hubei University of Technology National Enterprise Technology Center China Construction Ready Mixed Concrete Co. Ltd. Center of Advanced and Innovation Technologies Faculty of Metallurgy and Materials Engineering V?B-Technical University of Ostrava

The phosphorus slag（PS） can be used as a supplementary cementitious material due to its potential hydrating activity. However, its usage has been limited by its adverse effects, including prolonged setting and lowered early-stage strength. In this study, we achieved ultrafine granulation of PS using wetmilling（reducing d50 to as low as 2.02 μm） in order to increase its activity, and examined the physico-chemical properties of the resulting materials, including particle-size distribution, slurry pH, zeta potential, and activity index, as well as how their replacement level and granularity affect the setting time and mechanical performance of PS-cement mixture systems. The results suggested that as the granularity increases, there are significant boosts in the uniformity of particle sizes, slurry pH, and activity index, and the effects on cement paste, including setting times, and early-and late-stage strengths, are significantly mitigated. When d（50）=2.02 μm, the slurry becomes strongly alkaline（pH=12.16） compared to the initial d（50）=20.75 μm（pH=9.49）, and the activity is increased by 73%; when used at 40% replacement, the PS-cement mixture system can reach a 28 d compressive strength of 93.2 MPa, 36% higher than that of the pure cement control group.

关键词： wet-milling phosphorus slag ultrafine granulation setting time compressive strength

Machine Learning Techniques in Predicting Hot Deformation Behavior of Metallic Materials

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 713-732页

作者： Petr Opela Josef Walek Jaromír Kopecek Department of Metallurgical Technologies Faculty of Materials Science and TechnologyVSB–Technical University of OstravaOstrava70800Czech Republic FZU—Institute of Physics of the Czech Academy of Sciences Prague18200Czech Republic

In engineering practice,it is often necessary to determine functional relationships between dependent and independent *** relationships can be highly nonlinear,and classical regression approaches cannot always provide sufficiently reliable ***,Machine Learning(ML)techniques,which offer advanced regression tools to address complicated engineering issues,have been developed and widely *** study investigates the selected ML techniques to evaluate their suitability for application in the hot deformation behavior of metallic *** ML-based regression methods of Artificial Neural Networks(ANNs),Support Vector Machine(SVM),Decision Tree regression(DTr),and Gaussian Process regression(GPr)are applied to mathematically describe hot flow stress curve datasets acquired experimentally for a medium-carbon *** the GPr method has not been used for such a regression task before,the results showed that its performance is the most favorable and practically unrivaled;neither the ANN method nor the other studied ML techniques provide such precise results of the solved regression analysis.

关键词： Machine learning Gaussian process regression artificial neural networks support vector machine hot deformation behavior

Emerging potential of progranulin-dependent SorCS2 signaling in healthy and diseased nervous systems

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Neural regeneration research 2025年第9期20卷 2591-2593页

作者： Alena Salasova Anders Nykjær Danish research Institute of Translational Neuroscience DANDrITE-Nordic EMBL Partnership for Molecular Medicine and Centre of Excellence PROMEMODepartment of BiomedicineAarhus UniversityAarhusDenmark

The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young *** neurodevelopm... 详细信息

关键词： progr jointly CS2

A comprehensive investigation on nonlinear vibration and bending characteristics of bio-inspired helicoidal laminated composite structures

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 81-100页

作者： S.SAUrABH r.KIrAN D.SINGH r.VAISH V.S.CHAUHAN School of Mechanical and Materials Engineering Indian Institute of Technology Mandi

Bio-inspired helicoidal composite laminates, inspired by the intricate helical structures found in nature, present a promising frontier for enhancing the mechanical properties of structural designs. Hence, this study provides a comprehensive investigation into the nonlinear free vibration and nonlinear bending behavior of bio-inspired composite plates. The inverse hyperbolic shear deformation theory(IHSDT) of plates is employed to characterize the displacement field, with the incorporation of Green-Lagrange nonlinearity. The problem is modeled using the C0finite element method(FEM), and an in-house code is developed in the MATLAB environment to solve it numerically. Various helicoidal layup configurations including helicoidal recursive(Hr), helicoidal exponential(HE), helicoidal semi-circular(HS), linear helicoidal(LH), and Fibonacci helicoidal(FH)with different layup sequences and quasi-isotropic configurations are studied. The model is validated, and parametric studies are conducted. These studies investigate the effects of layup configurations, side-to-thickness ratio, modulus ratios, boundary conditions, and loading conditions at different load amplitudes on the nonlinear vibration and nonlinear bending behaviors of bio-inspired composite plates. The results show that the laminate sequence exerts a substantial impact on both nonlinear natural frequencies and nonlinear bending behaviors. Moreover, this influence varies across different side-to-thickness ratios and boundary conditions of the bio-inspired composite plate.

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Antisense oligonucleotides provide optimism to the therapeutic landscape for tauopathies

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Neural regeneration research 2025年第3期20卷 803-804页

作者： Glenn A.Harris Lauren r.Hirschfeld rainwater Charitable Foundation Fort WorthTXUSA

Tauopathies are a group of neurodegenerative diseases characterized by abnormal metabolism of the misfolded tau protein. Tau is encoded by the microtubule-associated protein tau gene(MAPT) and can be classified as either 3-repeat(3r) or 4-repeat(4r) based on the number of repeat domains from alternative splicing of exon 10 of the MAPT gene.

关键词： tau metabolism diseases

The Effect of Wet-grinding on the Properties of Glass Powder and Its Application in Cement Based Materials

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1372-1381页

作者： WANG Yingbin YANG Jie SU Ying HE Xingyang STrNADEL bohumir School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan 430068China Center for Advanced and Innovative Technologies VSB-Technical University of OstravaOstrava-Poruba 70833Czech Republic

To improve the pozzolanic reactivity,waste glass(WG)needs to be micronized to fine particles so as to expedite the leaching of active *** key feature of this work is to examine the effect of wet-grinded WG on the mechanical and structural properties of cement based *** experimental results show that wet-grinding can improve the ions leaching behavior of WGP and decrease the stability of silicon oxide *** pozzolanic reactivity of WGP was dramatically enhanced after wet-grinding,as high as 144.1%at 1 d and 110.9%at 28 d when the mean grain size of WGP reached 0.90μ*** ground WGP can promote the transformation of capillary pores to gel pores to improve the compactness of microstructure regardless of the reaction time.

关键词： supplementary cementitious materials pozzolanic reactivity wet-grinding compressive strength

risk Analysis of Cavitation in Hydraulic Structures

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World Journal of Engineering and Technology 2021年第3期9卷 614-623页

作者： Gabriel echávez Engineering Faculty National Autonomous University of Mexico Mexico City Mexico

Damages as a result of cavitation are ever existing problems in high-head spillways. This article presents a brief introduction to the problems associated with high-head spillways and describes a procedure that takes ... 详细信息

Damages as a result of cavitation are ever existing problems in high-head sprmal;">illways. This article presents a brief introduction to the problems associated with high-head spillways and describes a procedure that takes into account the flow near the chute surface where the phenomenon occurs, instead of the mean flow. Application of risk analysis methodology presented can be used to estimate whether there is a possibility of cavitation or there is necessity to determine where the first aereator should be located. The advantage of the procedure herein presented takes into consideration an important new variable, such as the surface roughness. In addition, emphasis should be placed first on the need to investigate other high-head dams which climate change may have exposed them to this kind of damages. Second, there is a need to make measurement in prototype. Finally, to underscore the importance of these problems, a comment is made concerning the Oroville Dam contingency in the state of California, (United States).

关键词： Cavitation Spillways Damages High Head risk Analysis Surface roughness