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  • Properties of NdFeB magnetic cement ScienceDirect

    2019-10-1 · In fact, magnetic cement composites have been commercialized for inductive applications by a few companies [,,]. Magnetic cement and concrete products with soft magnetic properties can be used for static and dynamic wireless charging of electric vehicles. These are ongoing projects with a

    Properties of NdFeB magnetic cement ScienceDirect

    Abstract. Enhanced functional properties of cement pastes were achieved by introducing hard magnetic powders (NdFeB) into cement mixtures. The magnetic cement (cementitious magnet) employed a simple and inexpensive cementitious process to form complex NdFeB magnet shapes. NdFeB particles were distributed uniformly in the cement matrix.

    Magnetic properties of the micro-silica/cement matrix

    Samples of micro-silica/cement containing iron oxide, Fe 2 O 3, and doped with carbon-coated cobalt nanoparticles and free radical DPPH were prepared and studied by the magnetic resonance method. The concrete’s main components (silica and cement) produced very complicated FMR/EPR (ferromagnetic and electron paramagnetic resonance) spectra.

    Magnetic properties of the micro-silica/cement matrix

    2008-10-1 · The standard micro-silica and cement produced by the Gorazdze Cement Works, Poland, was used for the matrix. The cement and micro-silica were mixed at the ratio of 12.5:1. Agglomerated cobalt magnetic nanoparticles coated with carbon at the concentration of 0.5 wt% and 0.1 wt% of free radical DPPH were dispersed in a mixed silica/cement matrix

    Magnetic properties of the micro-silica/cement matrix

    2008-10-1 · Samples of micro-silica/cement containing iron oxide, Fe 2 O 3, and doped with carbon-coated cobalt nanoparticles and free radical DPPH were prepared and studied by the magnetic resonance method. The concrete's main components (silica and cement) produced very complicated FMR/EPR (ferromagnetic and electron paramagnetic resonance) spectra.

    Magnetic properties and heavy metal pollution of

    2013-11-1 · China produces and consumes 45% of the global output of cement. The main objectives of this study were: (a) to evaluate a cement plant as a point source of heavy metal pollution in topsoil, (b) to investigate the magnetic properties of topsoils, and (c) to elucidate an association between magnetic parameters and heavy metal concentrations. 2.

    White Cement Manufacture, Properties and Uses

    2018-8-25 · 🕑 Reading time: 1 minuteWhite cement is same as that of grey Portland cement but the only differ is in the colour and fineness. This colour of this cement is determined by its raw materials and the process of manufacture. In this article we study about manufacture, properties, uses and difference of white cement. Contents:Manufacture []

    WHITE CEMENT PROPERTIES, MANUFACTURE,

    2001-12-14 · CaF2) with gypsum, thus allowing white cement clinker with a C3A content of less than 5 wt.% to be produced, which means a sulphate-resistant white cement or a white cement resistant to seawater. In this type of material the main fluorosulphate melt contains molten White cement properties, manufacture, prospects 45 (4) 158-163 (2001) 159

    Physicochemical Properties and Biocompatibility of

    2012-9-6 · Physicochemical Properties and Biocompatibility of White Dextrin Modified Injectable Calcium–Magnesium Phosphate Cement Fangping Chen The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237 People's Republic of

    What is White Portland Cement? Use and properties

    2020-3-31 · PROPERTIES OF WHITE CEMENT CONCRETE. The initial setting time is 100 minutes. The fineness of white cement is 395 kg/m2. The brightness of white cement is 87%. The compact density of white density is 3150 kg/m3. Bulk density of white cement

    Melting behavior of water confined in nanopores of

    The size and distribution of pores have been studied through the melting behavior of water confined in white cement samples by1H nuclear magnetic resonance cryoporometry. It is found that the sample cured at 298 K shows a considerably coarser pore structure in the range of pores from 1 to 15 nm when compared with the samples cured at 278 K.

    Pore-size resolved water vapor adsorption kinetics of white

    2018-1-10 · The dynamic pore structure of partially saturated cement-based material is rather essential to quantify its mass transport and many other properties. To clarify the influence of water removal and re-entry, the low-field nuclear magnetic resonance technique is employed to characterize the pore structure of two white cement mortars during isopropanol exchange and water vapor adsorption kinetics.

    Improving Mechanical Properties of High Strength

    2021-4-14 · e ect on cement particles, prevent its compressing and, due to separation, may cause better lubrica-tion. E ect on Compressive Strength Values of the compressive strength at 28 days and the variation percentage of magnetic concrete strength in comparison with non-magnetic concrete, were pre-sented in Table 4. In the 28-day sample, we observed

    Single-point magnetic resonance imaging (MRI) of

    The use of Magnetic Resonance Imaging (MRI) as a tool for non-destructive testing of moisture distribution and moisture migration in concrete and mortar is described. MRI spatially resolves in one, two, or three dimensions, the evaporable water content in cement based materials as a function of time, treatment or processing conditions. The use of the technique is demonstrated through studies

    Densification of C–S–H Measured by 1H NMR

    2012-12-7 · The nanoscale morphology of, and pore water interactions in, calcium silicate hydrate (C–S–H), the active component of cement, remain uncertain. 1H nuclear magnetic resonance (NMR) can fully characterize the nanoporosity of C–S–H in as-prepared material without the need for damaging sample drying. We use NMR to follow the density of C–S–H in sealed cured pastes as a function of

    A comparative study on the mechanical, physical and

    2020-2-18 · In this study, fabrication of a composite containing the ordinary Portland cement (OPC) and magnetite (Fe3O4) micro/nanoparticles is reported. In the first stage, the cement paste samples with a

    Are all white boards magnetic? findanyanswer

    Whiteboards are manufactured with a variety of materials used for the dry erase surface. The resulting products are melamine, porcelain, glass, or a proprietary surface such as the EVERWhite surface. Not all can be magnetic. Boards with a melamine, or painted surface are only available non-magnetic.

    Quick Answer: What Do You Mix White Cement With?

    2020-2-23 · How is white cement used? White cement is used for filling the gaps in ceramic tiles, vitrified tiles and marble flooring. Mixing the white Cement with colour pigments can help you match the tile colour by creating an illusion of a single floor piece slab. They are used as sealants to fill in the gaps []

    ThistlePro Magnetic British Gypsum

    ThistlePro Magnetic plaster contains special additives to attract magnets, allowing the creation of interactive walls. Walls can be decorated with paint, wallpaper, stickers or specialist finishes such as whiteboard or chalkboard paint without affecting the attraction of the magnets.

    How To Color Concrete & Cement Crafts Artsy

    2021-5-11 · The one in the middle is the off-white (sometimes beige) Cement All. and the one on the right is the white cement. So when compared alongside the added red pigment, the Portland cement on the left (both top and bottom) shows the color of the natural Portland cement

    Will Magnets Stick to Cast Iron? (Why?) [2021]

    2021-2-11 · As the white cast iron is formed when the carbon does not form the graphite on solidification and results in the formation of cementite this also possesses the properties of ferromagnetic. Thus, due to the ferromagnetic structure of white cast iron it possesses the properties of magnetic and it

    STUDY OF THE NANO-STRUCTURE OF C-S-H USING

    2015-6-11 · We have used NMR relaxometry to characterise the composition and evolution of cement paste with silica fume. White cement paste with 10% of cement mass replacement by silica fume is mixed at a water-to-binder ratio of 0.4. Silica fume is pre-dispersed in water for 8 minutes in an ultrasonic bath before addition of cement and paste mixing.

    Microstructure and Magnetic Properties of Barium

    Barium hexaferrite (BaFe12O19) with hexagonal structure has been known as the high performance magnetic for Radar Absorber Material (RAM). Barium hexaferrite (BaM) was synthesized by sol gel auto combustion to get an homogeneous nanoparticle of BaM. Barium hexaferrites obtained from solution mixture between barium nitrate and ferri nitrate nonahidrat with precipitation of ion barium (Ba2

    Multiscale nuclear magnetic relaxation dispersion of

    The nuclear magnetic relaxation dispersion (NMRD) technique consists of measurement of the magnetic-field dependence of the longitudinal nuclear-spin-lattice relaxation rate 1/T 1.Usually, the acquisition of the NMRD profiles is made using a fast field cycling (FFC) NMR technique that varies the magnetic field and explores a very large range of Larmor frequencies (10 kHz < ω 0 /(2π) <40 MHz).

    ThistlePro Magnetic British Gypsum

    ThistlePro Magnetic plaster contains special additives to attract magnets, allowing the creation of interactive walls. Walls can be decorated with paint, wallpaper, stickers or specialist finishes such as whiteboard or chalkboard paint without affecting the attraction of the magnets.

    Are all white boards magnetic? findanyanswer

    Whiteboards are manufactured with a variety of materials used for the dry erase surface. The resulting products are melamine, porcelain, glass, or a proprietary surface such as the EVERWhite surface. Not all can be magnetic. Boards with a melamine, or painted surface are only available non-magnetic.

    Guide for authors Cement and Concrete Research

    2021-5-7 · The aim of Cement and Concrete Research is to publish the best research on cement, cement composites, concrete and other allied materials that incorporate cement. In doing so, the journal will present: the results of research on the properties and performance of cement and concrete; novel experimental techniques; the latest analytical and modelling methods; the examination and the

    王春海的个人主页-西北工业大学教师个人主页 nwpu.edu.cn

    王春海,北京大学化学与分子工程学院理学博士,2018年9月入职西北工业大学材料学院。分别在山东大学、北京大学获得学士与博士学位,随后在北京大学物理学院、中国工程物理研究院、英国杜伦大学、澳大利亚悉尼大学及南方科技大学从事科研工作,主攻固体化学、精细晶体结构解析、磁电功能

    MATERIALS EXPRESS aspbs

    2010-11-22 · Materials Expressis a peer-reviewed multidisciplinary journal reporting emerging research on materials science, engineering and biology.Cutting-edge research on the syntheses, characterizations, properties, and applications of a wide range of materials are covered for broad readership; from physical sciences to life sciences.

    Polyvinyl chloride Wikipedia

    2021-5-10 · Discovery. PVC was synthesized in 1872 by German chemist Eugen Baumann after extended investigation and experimentation. The polymer appeared as a white solid inside a flask of vinyl chloride that had been left on a shelf sheltered from sunlight for four weeks. In the early 20th century, the Russian chemist Ivan Ostromislensky and Fritz Klatte of the German chemical company Griesheim

    Composition of cement Penn State College of

    2000-3-17 · Properties of cement compounds These compounds contribute to the properties of cement in different ways Tricalcium aluminate, C 3 A:-It liberates a lot of heat during the early stages of hydration, but has little strength contribution. Gypsum slows down the hydration rate of C 3 A. Cement low in C 3 A is sulfate resistant. Tricalcium silicate

    A comparative study on the mechanical, physical and

    2020-2-18 · In this study, fabrication of a composite containing the ordinary Portland cement (OPC) and magnetite (Fe3O4) micro/nanoparticles is reported. In the first stage, the cement paste samples with a

    Hard magnetic properties of FeCoNiAlCuXTiX based

    2021-1-6 · The temperature dependence of magnetic properties was characterized to evaluate the stability of the HEA samples optimized at the annealing temperature of 650 °C (shown in Figure 4). The H C in Alloy D gradually decreases to 0.5 Oe at 850 °C, due to the ferromagnetic-to-paramagnetic phase transition, with a 5.5% reduction in H C from 25 °C

    Multiscale nuclear magnetic relaxation dispersion of

    The nuclear magnetic relaxation dispersion (NMRD) technique consists of measurement of the magnetic-field dependence of the longitudinal nuclear-spin-lattice relaxation rate 1/T 1.Usually, the acquisition of the NMRD profiles is made using a fast field cycling (FFC) NMR technique that varies the magnetic field and explores a very large range of Larmor frequencies (10 kHz < ω 0 /(2π) <40 MHz).

    STUDY OF THE NANO-STRUCTURE OF C-S-H USING

    2015-6-11 · We have used NMR relaxometry to characterise the composition and evolution of cement paste with silica fume. White cement paste with 10% of cement mass replacement by silica fume is mixed at a water-to-binder ratio of 0.4. Silica fume is pre-dispersed in water for 8 minutes in an ultrasonic bath before addition of cement and paste mixing.

    Effect of Magnetic Field Coupled Deep Cryogenic

    2020-3-30 · In this study, a new magnetic field coupled deep cryogenic treatment (MDCT) is developed and its effect on wear resistance of AISI 4140 steel is investigated. Compared with wear resistance of untreatment (UT), wear resistance of MDCT increases by 29%. Wear resistance is inversely proportional to the friction coefficient. The treatment promotes the phase transformation and dislocation movement

    ThistlePro Magnetic British Gypsum

    ThistlePro Magnetic plaster contains special additives to attract magnets, allowing the creation of interactive walls. Walls can be decorated with paint, wallpaper, stickers or specialist finishes such as whiteboard or chalkboard paint without affecting the attraction of the magnets.

    Are all white boards magnetic? findanyanswer

    Whiteboards are manufactured with a variety of materials used for the dry erase surface. The resulting products are melamine, porcelain, glass, or a proprietary surface such as the EVERWhite surface. Not all can be magnetic. Boards with a melamine, or painted surface are only available non-magnetic.

    Microstructure and Magnetic Properties of Barium

    Barium hexaferrite (BaFe12O19) with hexagonal structure has been known as the high performance magnetic for Radar Absorber Material (RAM). Barium hexaferrite (BaM) was synthesized by sol gel auto combustion to get an homogeneous nanoparticle of BaM. Barium hexaferrites obtained from solution mixture between barium nitrate and ferri nitrate nonahidrat with precipitation of ion barium (Ba2

    Quick Answer: What Do You Mix White Cement With?

    2020-2-23 · How is white cement used? White cement is used for filling the gaps in ceramic tiles, vitrified tiles and marble flooring. Mixing the white Cement with colour pigments can help you match the tile colour by creating an illusion of a single floor piece slab. They are used as sealants to fill in the gaps []