Substitute Mixtures
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Recycling ceramic waste as a raw material in sanitary ware production
Resumo Este estudo caracterizou o resíduo de louças sanitárias descartadas que não atendiam aos requisitos de qualidade. Para compreender a composição de tal resíduo, as amostras foram coletadas, processadas e caracterizadas. Este resíduo de cacos de louça cerâmica moídos foi usado para substituir o pó de granito utilizado nas massas cerâmicas e
Cerâmica. Publicado em: 15/08/2019
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2. Influência do resíduo de PVC como agregado no concreto para peças de pavimentos intertravados
Resumo Este trabalho apresenta uma análise da influência do resíduo de PVC como substituto parcial do agregado miúdo em propriedades físicas como absorção de água, índice de vazios, massa específica e de resistência à compressão do concreto dosado para peças de pavimentos intertravados. Foram analisados quatro traços de concreto, sendo um de r
Ambient. constr.. Publicado em: 10/06/2019
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3. Replacement of fluorspar in the desulfurization of hot metal
Abstract In the steel industry, lime is used as a desulfurizing agent and fluorspar as flux in the hot metal desulfurization process. However there are environmental concerns regarding the use of fluorspar, even when its harmful effects are not fully known. In order to reduce such risks and also to anticipate possible future restrictions, which could undermi
REM, Int. Eng. J.. Publicado em: 2018-04
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4. Cell response of calcium phosphate based ceramics, a bone substitute material
The aim of this study was to characterize calcium phosphate ceramics with different Ca/P ratios and evaluate cell response of these materials for use as a bone substitute. Bioceramics consisting of mixtures of hydroxyapatite (HAp) and β-tricalcium phosphate (β-TCP) powders in different proportions were pressed and sintered. The physical and chemical proper
Mat. Res.. Publicado em: 23/04/2013
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5. Reusing of fine quarries in paving: a technical and economical approach / Reaproveitamento de finos de pedreiras em pavimentação: uma abordagem técnica e econômica
The wastes generated by the quarry companies from civil construction represent an activity that has been outstanding because of the countless problems that appear with their stockpiling and maintenance. The great concern with those wastes is linked to the capacity to generate social and environmental effects that can harm the ambient through the appearance o
Publicado em: 2010
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6. Novo método para a estimação das propriedades de caracterização de frações leves de petróleo
Neste trabalho são apresentados dois modelos para o ensaio de destilação ASTM D-86, desenvolvidos no simulador EMSO e validados por dados experimentais de frações de petróleo disponíveis na literatura. Estes modelos apresentam índice algébrico-diferencial igual a um, diferentemente do primeiro modelo proposto na literatura que apresentava índice al
Publicado em: 2010
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7. CARBONATAÇÃO NATURAL DE PROTÓTIPOS DE CONCRETO COM CINZA DE CASCA DE ARROZ SEM MOAGEM / NATURAL CARBONATION IN CONCRETE PROTOTYPES WITH NON-GROUND RICE HUSK ASH
Cement is the construction building material with higher responsibility by carbon dioxide emission of all industrial human activities, besides be a considerably expensive material, more than the rice husk ash in nature. Environmental benefits are generated in its utilization, because rice husk ashes are industrial process residues of the grain processing, th
Publicado em: 2010
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8. Estudo de dosagem de concreto convencional feito como CP II F-32 e agregados de Rio Branco-Acre e utilização de uma argila calcinada como pozolana na substituição parcial do cimento
In the state of Acre, Brazil, traditional fine and coarse grain aggregates are used. By the way, the concrete materials proportioning (of that region, as well as of all regions) aim to reach the better quality (strength, durability) instead of costs. This paper offers data for a rational concrete dosage using sand of the Rio Acre, granite aggregate from the
Publicado em: 2009
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9. Metodologia analítica para quantificar o teor de biodiesel na mistura biodiesel: diesel utilizando espectroscopia na região do infravermelho
Considered the best substitute for diesel, biodiesel can be blended with diesel in any ratio, bringing lots of environmental, economic and social advantages. Brazilian law Nº 11097/2005, proposes the introduction of biodiesel in to the Brazilian energy matrix, mixed with diesel at a minimum percentage of 2%. For consumers and sellers to be sure that the com
Química Nova. Publicado em: 2008
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10. CONCRETE MICROESTRUTURE STUDY WITH ADDITION OF UNGROUND RESIDUAL RICE HUSK ASH WITHOUT BURN CONTROL / ESTUDO DA MICROESTRUTURA DO CONCRETO COM ADIÇÃO DE CINZA DE CASCA DE ARROZ RESIDUAL SEM BENEFICIAMENTO
The use of mineral adition in concrete is a widely studied theme for several researchers that looking for features like: save cement for reducing costs, durability improvement to increase mechanical strenght and use of industrial wastes for reducing environmental pollution. This study intend to analize the microstructure of concretes mixtures with ungrounded
Publicado em: 2008
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11. Utilização de plasma na remoção de oleo da superficie de aluminio / Plasma use in the oil rremoval of the aluminium surface
The increasing concern with the sustainable development ally with a bigger awareness with regard to the preservation of the environment has stimulated research in the most diverse areas of ambient correct technologies. Inside of this context the cold plasma technology represents an efficient, ambient correct and economic alternative for cleanness of the alum
Publicado em: 2006
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12. Construção e aplicação de eletrodo de aço inoxidável UNS S31254 como eletrodo indicador em titulações condutimétricas
UNS S31254 SS electrodes have been built to substitute platinum in conductimetric titrations. The electrodes were tested in both acid-basic titration (chloridric acid and sodium hydroxide) and precipitation titration (sodium chloride and argentum nitrate as titrant). The practical application was exemplified from conductimetric tritations of HF
Química Nova. Publicado em: 2003-01