Granular Materials
Mostrando 1-12 de 70 artigos, teses e dissertações.
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1. The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash
Abstract Pelletization of zeolitic materials is required to facilitate their practical industrial and commercial applications. Zeolite-NaA was synthesized from fly ash by the fusion method and shaped into spherical granules. Bentonite, kaolinite, and a combination of bentonite with kaolinite were tested as binders with different contents from 5 to 10 wt%. Th
Cerâmica. Publicado em: 2022
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2. Using static, kinetic and metal mobility procedures to evaluate possibilities of coal waste land disposal at Moatize Mine, Mozambique
Abstract Coal mine waste rocks produced during mining and beneficiation can affect the environment due to land degradation and acid mine drainage generation. However, proper characterization and treatment of mineral processing wastes creates options for safe disposal, enhancing the environmental performance. The aim of this study was to use static and kineti
REM, Int. Eng. J.. Publicado em: 2020-12
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3. Prediction of pressure drop through packed beds of granular materials: influence of moisture reduction and air velocity
Resumo Neste estudo foi investigada a influência da umidade do sólido sobre a queda de pressão em leitos fixos de soja, cevada, lentilha e aveia. As propriedades dos grãos e do leito foram determinadas variando-se a umidade dos sólidos entre o valor de equilíbrio até 0,24 g g-1 (massa de água por massa de sólido seco). As quedas de pressão nos leit
Braz. J. Food Technol.. Publicado em: 07/10/2019
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4. Carregamento e caracterização do fármaco carboplatina na microestrutura microporosa do biomaterial granulado bifásico micro e nanoestruturado de fosfato de cálcio
RESUMO As biocerâmicas bifásicas hidroxiapatita/fosfato tricálcico-beta (HA/TCP-β) microporosas são pesquisadas e se destacam em aplicações biomédicas como substitutos dos tecidos ósseos. Estes biomateriais são biocompatíveis e apresentam microestruturas microporosas interconectadas, que permitem sua utilização no reparo do tecido ósseo. Devido
Matéria (Rio J.). Publicado em: 16/09/2019
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5. Dynamic Arrays Based on Magnetically Controlled Particles: Synthesis and Application
Growth mechanisms of dynamic granular arrays based on magnetically controlled particles are presented. Method of the external rotating magnetic field (ERMF), based on a dipole interaction of magnetic spherical Fe3O4 particles in highly ordered volume arrays is proposed and a design for its practical implementation is developed. The magnetic assembly can resu
Mat. Res.. Publicado em: 19/08/2019
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6. Carregamento e caracterização do fármaco carboplatina na microestrutura microporosa do biomaterial granulado bifásico micro e nanoestruturado de fosfato de cálcio
RESUMO As biocerâmicas bifásicas hidroxiapatita/fosfato tricálcico-beta (HA/TCP-β) microporosas são pesquisadas e se destacam em aplicações biomédicas como substitutos dos tecidos ósseos. Estes biomateriais são biocompatíveis e apresentam microestruturas microporosas interconectadas, que permitem sua utilização no reparo do tecido ósseo. Devido
Matéria (Rio J.). Publicado em: 20/05/2019
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7. On the observation of extended microstructures and localized deformations in granular materials - A feature of excat quasi-convex energy envelope
Abstract In this paper a most promising scope of the exact quasiconvex energy envelope in modeling the granular materials with microstructures is presented. This study shows that it is possible to observe both the extended microstructures and localized deformations in granular materials using a variational model based on the mathematical relaxation theory. T
Lat. Am. j. solids struct.. Publicado em: 25/04/2019
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8. Anisotropic Strength of Granular Material Considering Fabric Evolution
Abstract The effect of fabric anisotropy on strength has not been considered in most strength criterions for granular material. Some criterions can describe the variation of material strength with stress-induced anisotropy, but micro-mechanism and physical meanings are undefined. Some criterions consider the effect of fabric anisotropy, but the evolution of
Lat. Am. j. solids struct.. Publicado em: 08/04/2019
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9. Carbon Fiber Reinforced Polymer and Epoxy Adhesive Tensile Test Failure Analysis Using Scanning Electron Microscopy
Morphological characteristics analysis before and after tensile tests were studied using scanning electron microscopy (SEM) technique to follow the failure evolution on carbon fiber reinforced polymer (CFRP) and epoxy resins. Micrograph analysis of CFRP plate before tensile test shows some intrinsic manufacturing defects, which can influence the mechanical p
Mat. Res.. Publicado em: 06/07/2017
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10. Achieving effective confinement through utilization of non-Newtonian fluid mixture as stemming structure
Abstract The economics of a mining operation is directly influenced by blasting outcomes, where blasting aims to comminute the rock mass in order to attain smaller grain sizes to be loaded and hauled at a minimum cost for its first processing stage. In order to promote adequate rock breakage, the stemming structure needs to provide proper confinement for the
REM, Int. Eng. J.. Publicado em: 2017-03
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11. A Simple One-Scale Constitutive Model for Static Liquefaction of Sand-Silt Mixtures
Abstract Instability of liquefaction is one of the major reasons which results in the failure of earth structure such as dam. The present study focuses on the simulation of static liquefaction behavior for granular materials such as sand and sand-silt mixtures. Based on micromechanical analysis of inter-particle behavior, a simple one-scale model is proposed
Lat. Am. j. solids struct.. Publicado em: 2016-11
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12. Evaluation of chemical and mechanical resistance of virgin and recycled poly (ethylene terephthalate) and poly(methylene oxide) when applied as gravel pack in petroleum wells
AbstractNowadays more and more unexpected uses for common materials have been observed, especially when recycled polymers are concerned. In this work, the viability for application of virgin and recycled poly(ethylene terephthalate) (PETvir and PETrec, respectively) and also poly(methylene oxide) (PMO) as granular materials (gravel) for gravel packing in san
Polímeros. Publicado em: 2015-08