Particle Density
Mostrando 13-24 de 640 artigos, teses e dissertações.
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13. Development of Sustainable Eggshell Waste-Polyester Resin Composite Material for Using as Artificial Rock
The aim of this work was to study the possibility of reuse of chicken eggshell waste produced in the food manufacturing industry for processing of sustainable eggshell waste-polyester resin composite materials for use as artificial carbonaceous rocks. For this purpose, composite specimens with different eggshell waste-polyester resin compositions in differen
Mat. Res.. Publicado em: 14/10/2019
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14. Plastics floatability: effect of saponin and sodium lignosulfonate as wetting agents
Abstract Froth flotation is the most common process in mineral processing. For the separation of plastic mixtures by flotation, the use of appropriate wetting agents is mandatory. The floatability of six post-consumer plastics was studied at different concentrations of the wetting agents, saponin and sodium lignosulfonate. Also, the influence of size and sha
Polímeros. Publicado em: 03/10/2019
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15. Influência da composição granulométrica das partículas de resíduos de madeira nas propriedades de compósitos minerais: parte 2: gesso-madeira
Resumo Resíduos de construção e demolição (RCD) de madeira podem ser incorporados em compósitos de fibras naturais, reduzindo os impactos ambientais, o que contribui para o desenvolvimento de materiais, produtos e processos mais sustentáveis. Nesse sentido, o objetivo deste estudo foi avaliar a influência da composição granulométrica das partícul
Ambient. constr.. Publicado em: 03/10/2019
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16. IMPROVEMENT OF METHANE STORAGE CAPACITY IN ACTIVATED CARBON BED WITH BIDISPERSE PACKING
Abstract This study presents a numerical investigation of the dynamics of methane adsorption in granular activated carbon beds with bidisperse packing in order to reduce the void spaces between the adsorbent particles and to improve the storage capacity in adsorbed natural gas vessels. Two distinct particle sizes (d and D) were used for the packing of the bi
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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17. Mechanical Properties and Metallurgical Characterization of LM25/ZrO2 Composites Fabricated by Stir Casting Method
ABSTRACT Zirconia (ZrO2) dispersed aluminum alloy metal matrix composites produced by stir casting techniques. Using stir casting techniques, aluminium based composites with varying amounts of 3%, 6%, 9%, and 12% of zirconia by weight are fabricated. The prepared samples were subjected to physical, mechanical,tribiology and microstructure investigation. The
Matéria (Rio J.). Publicado em: 16/09/2019
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18. Caracterização de partículas de açaí visando seu potencial uso na construção civil
RESUMO Na Amazônia, o principal potencial de contribuição para os Objetivos de Desenvolvimento Sustentável (ODS), está no aproveitamento de resíduos da agroindústria para uso na construção civil, como alternativa de novos materiais sustentáveis. Neste contexto, objetivou-se com este trabalho avaliar o potencial uso de partículas de resíduos de a�
Matéria (Rio J.). Publicado em: 16/09/2019
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19. PARTICLE IMAGE VELOCIMETRY FOR ESTIMATING THE YOUNG’S MODULUS OF WOOD SPECIMENS
ABSTRACT Proposing technological innovations in the investigation of the structure and behaviour of wood is important to optimize its use. The assimilation of methods diffused in other areas, such as particle image velocimetry (PIV), can allow a rich range of information for different aspects. The aim of this study was to estimate the Young’s modulus usin
CERNE. Publicado em: 09/09/2019
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20. CHANGES IN THE SOIL STRUCTURE AND ORGANIC MATTER DYNAMICS UNDER DIFFERENT PLANT COVERS
ABSTRACT The soil properties reported in areas with different management provide useful information about the systems’ operation, state of conservation and resilience. In this way, this study evaluated physical properties and organic matter dynamics of soil under different plant covers in seven areas consisting of: five areas under ecological restoration (
CERNE. Publicado em: 09/09/2019
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21. Effect of Curing Temperature, Activator Solution Composition and Particle Size in Brazilian Fly-Ash Based Geopolymer Production
The geopolymer binder is a relatively new class of inorganic binding material of elevated mechanical strength and good chemical properties. This can be produced using clay minerals or byproducts of the industrial processes, such as metakaolin, fly-ash and blast furnace slag. In this work, geopolymers were produced by alkaline activation of a Brazilian fly-as
Mat. Res.. Publicado em: 22/08/2019
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22. Field Perception of the Boundary Between Soil and Saprolite by Pedologists and its Differentiation Using Mathematical Models
ABSTRACT Saprolite plays a central role into hydrologic and nutrient cycles. Despite that, saprolite research is scattered and uses heterogeneous, sometimes conflicting, methods and concepts. During field work, it is difficult to assign the boundary between soil and saprolite. This paper aimed to identify the subjacent logic that pedologists use to assign to
Rev. Bras. Ciênc. Solo. Publicado em: 27/06/2019
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23. Analysis of the densification of a composite obtained by sintering process of aluminum bronze powders with different carbides
Abstract Aluminum bronze alloy is applied in environments that require materials of high mechanical resistance and wear, such as marine, oil & gas and aerospace ones. This study analyzes the densification of composites based on aluminum bronze with additions of the vanadium (VC) and niobium (NbC) carbides, and the influence of these carbides in the milling e
REM, Int. Eng. J.. Publicado em: 19/06/2019
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24. Impact of methods used to reconstitute tailings specimens on the liquefaction potential assessment of tailings dams
Abstract The aim of this research is to investigate the liquefaction susceptibility of silt sandy mining tailings by experimental laboratory techniques. The main aspect analyzed is how techniques of sample reconstitution impact the results obtained in static undrained triaxial tests. Different methods of sample preparation are reviewed, such as moist tamping
REM, Int. Eng. J.. Publicado em: 19/06/2019