Permeability To The Air
Mostrando 13-24 de 82 artigos, teses e dissertações.
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13. Structural and fluid dynamic characterization of calcium carbonate-based porous ceramics
The aim of this work was to experimentally evaluate the use of calcium carbonate as a pore-generating agent in ceramic compositions. Compositions that contained 50% kaolin, 20% limestone, and different concentrations of quartz and feldspar were prepared by uniaxial pressing. Samples were heat-treated at a heating rate appropriate to induce calcium carbonate
Mat. Res.. Publicado em: 10/09/2013
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14. An experimental simulation model for coated paper drying
Due to the lack of information regarding the phenomena of mass, heat, and momentum transfer in coated paper drying, substantial research work still needs to be done. A simulation model for coated paper drying is introduced which integrates heat and mass transfer mechanisms. In the model, the coated paper was assumed to have 3 layers (coated layer, wet and dr
Braz. J. Chem. Eng.. Publicado em: 2013-09
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15. AnÃlise do Fluxo de Gases na Camada de Cobertura do Aterro SanitÃrio Municipal Oeste de Caucaia (ASMOC) / Analysis of gas Flow in covering layer of Municipal Landfill West of Caucaia (ASMOC)
The growing human consumption entails a greater generation of waste, which, in turn, must be properly treated and disposed. The storage of waste in landfills produces gas, which if not managed properly will affect the quality of life. The uncontrolled emissions of these gases cause multiple economic, social and environmental impacts, as due to air pollution
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/01/2012
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16. Relation of transverse air permeability with physical properties in different compositions of sugarcane bagasse particleboards
Studies concerning the production of particleboards with sugarcane bagasse as an alternative fibrous material have been carried out as an attempt to provide a sustainable and viable destination for this residue. This work aimed to evaluate the influence of several processing variables related to the microstructure of sugarcane bagasse particleboards (mat typ
Mat. Res.. Publicado em: 22/11/2012
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17. Desenvolvimento de método para medida de permeabilidade superficial de revestimentos de argamassa. / Development of method for measuring the surface permeability of coating mortar.
The phenomenon of permeability refers to the ability with which a fluid is transported through a porous medium, driven by pressure gradient between the material and the external environment. Degradation agents are conducted to the interior of mortar and concrete driven through such a phenomenon. Therefore, it is the permeability as a key parameters for durab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/05/2011
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18. ALTERAÇÕES FÍSICAS E QUÍMICAS DE UM CAMBISSOLO HÚMICO EM POVOAMENTOS DE Pinus taeda L. COM DIFERENTES ROTAÇÕES / PHYSICAL AND CHEMICAL CHANGES OF A Haplumbrept IN STANDS OF Pinus taeda L. WITH DIFFERENT ROTATIONS
Starting from the assumption that changes in land use can provide changes in physical and chemical properties, influencing its quality, the study aimed to verify whether the introduction of Pinus taeda L., on soil under native grassland conditions, can degrade physical and chemical quality of Haplumbrept soil in different rotations. The study was conducted i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2011
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19. Permeability measuremens of brazilian Eucalyptus
The permeability of Brazilian Eucalyptus grandis and Eucalyptus citriodora wood was measured in a custom build gas analysis chamber in order to determine which species could be successfully treated with preservatives. Liquid permeability was tested using an emulsion of Neen oil and a control of distillated water. Air was used to test the gas phase permeabili
Materials Research. Publicado em: 2010-09
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20. Avaliação das propriedades de transporte de massa contendo adições minerais / Evaluation of the mass transport containing mineral admixtures
The durability of reinforced concrete structures is damaged by the degrading action of the penetration of substances in the form of gases, vapors and liquids through the pores and cracks. It is known that water both in its pure form or containing dissolved ions such as chloride, sulphate, carbon dioxide or oxygen ions, can compromise the durability of concre
Publicado em: 2009
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21. VARIABILIDADE ESPACIAL E ESTIMATIVA DA CONDUTIVIDADE HIDRÁULICA E CARACTERIZAÇÃO FÍSICO-HÍDRICA DE UMA MICROBACIA HIDROGRÁFICA RURAL / SPACIAL VARIABILITY AND ESTIMATIVE OF THE HYDRAULIC CONDUCTIVITY AND PHYSICAL-HIDRICS CHARACTERIZATION OF A RURAL WATERSHED
The soil management systems involve changes in soil physico-hydrical properties. The objective of this study was (i) characterize the soil physico-hydrical properties in the layer 0-5 cm for different soil management systems in the Cândido Brum watershed, (ii) build a map with the spatial variability of soil saturated hydraulic conductivity (Ks), (iii) esti
Publicado em: 2009
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22. Obtenção e caracterização de espumas cerâmicas de alumina para uso como queimadores radiantes
Ceramic foams are cellular porous ceramics that can be produce by different methods, like replica method, sacrificial template method and direct foaming method. Foams are a type of porous ceramic which present many properties making them a very versatile material, used in different applications, like radiant porous burners. Radiant burners consist of ceramic
Publicado em: 2009
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23. COMPORTAMENTO FÍSICO DE UM LATOSSOLO SOB INTEGRAÇÃO LAVOURA - PECUÁRIA / PHYSICAL BEHAVIOR OF A OXOSOL UNDER CROP-LIVESTOCK INTREGATION
Soil compaction under traffic of animals has become an increasingly significant problem in soils used for crop-livestock integration. The objective of this study was to determine the effect of integration crop-livestock and different soil management systems on their attributes water and mechanical and relate them to the development and productivity of soybea
Publicado em: 2009
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24. Development and characterization of films based on Canna indica L. flour / Elaboração e caracterização de biofilmes de farinha de biri (Canna indica L.)
The focus in biodegradable films is a global trend and has received a significant attention in recent years, thus motivating studies related to the development and characterization of films based on natural macromolecules. The objective of this study is to develop edible films from biri flour (Canna indica L.) and evaluate the effect of four process variable
Publicado em: 2009