Wood Cement
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. DESEMPENHO DE DUAS ESPÉCIES FLORESTAIS EM COMBINAÇÃO COM CASCA DE ARROZ NA FABRICAÇÃO DE PAINÉIS CIMENTOMADEIRA / PERFORMANCE OF TWO SPECIES IN COMBINATION WITH RICE HUSK IN THE MANUFACTURE OF CEMENT-WOOD PANELS
The present paper had as objective the evaluation of performance of panels composed by cement and different proportions of two combined wooden species with rice husk. There, were applied treatments where the levels of wooden residues were 0, 25, 50, 75 and 100%, while the proportion of rice husk was 100, 75, 50, 25 and 0%, respectively. The wood species in t
Publicado em: 2009
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14. Compósitos de serragem de madeira e resíduos de recauchutagem de pneu
The possibility of using solid residues from of the lumber industry and the discarded tires motivated this work of research, which had as objective to evaluate the technological characteristics of two types of reconstituted composites of wood particles in the mixture with particles of rubber tires, with the addition of cement or phenolic resin. Panels were m
Publicado em: 2008
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15. Caracterização fisico-química de adobe estabilizado com amido de mandioca
Due to the high habitational Brazilian shortage, traditional technologies of earth construction and constructive elements production have been rescue, having the soil as a principal raw material. Between these traditional technologies, there are the adobes, which consist of soil blocks with regional variable size. The soil material is removed, humidified, tr
Publicado em: 2008
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16. Descrições de técnicas da química na produção de bens de acordo com os relatos dos naturalistas viajantes no Brasil colonial e imperial
European naturalists explored Brazil in long scientific expeditions and published accounts that make up a rich and still largely untapped historiographic source for the understanding of the history of chemistry. The production of indigo dye, the manufacture of limestone, extraction and purification of saltpeter and the production of salt are discussed. Lime
Química Nova. Publicado em: 2007-10
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17. Cruzetas de polímeros reciclados: caracterização dos materiais, análise numérica e ensaios de modelos reduzidos / Recycled polymer crossarms: characterization of the materials, numerical analysis and tests in reduced models
Nowadays, wood is still the most used material in crossarms of aerial power distribution lines in Brazil. However, it has caused problems to power utilities concerning (i) degradation due to defects and attacks of fungi and insects, (II) higher operational costs to replace damaged pieces and (III) environmental problems, as the raw material has become scarce
Publicado em: 2007
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18. Utilização de resíduos da indústria madeireira para fabricação de chapas cimento-madeira / Utilization of the lumber industry for cement-wood particleboard production
A industrialização da madeira gera grande quantidade de resíduos, que são lançados no meio ambiente, e não são aproveitados em sua totalidade, ou quando no máximo são utilizados para geração de energia causando também poluição ambiental. Esta pesquisa teve como objetivo avaliar por meio de ensaios físicos, mecânicos e análise da interface fi
Publicado em: 2006
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19. Contribution for the cement-wood development composite with materials of the Amazon region / Contribuição para o desenvolvimento de compósito cimento-madeira com materiais da região amazônica
Este trabalho objetiva contribuir para a aplicação do resíduo do tecido lenhoso de espécies vegetais tropicais, na forma de serragem, proveniente da indústria madeireira do estado do Pará; da região metropolitana de Belém em particular; para a fabricação de compósito madeira-cimento. Devido à natural incompatibilidade química entre a madeira e o
Publicado em: 2005
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20. Caracterização do compósito cimentício com a adição de particulados de madeira - Espécie Pinus Taeda
The purpose of this paper is to evaluate the performance of cement composite with the addition of vegetable particle. Raw materials were characterized according to granulometry, organic contamination, clay content, pulverulent material. Wood particles of Pinus Taeda species were mixed with sand, gravel, Portland CP V ARI RS cement and water. Samples 512 were
Publicado em: 2004
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21. Comparative evaluation of pyrethroid insecticide formulations against Triatoma infestans (Klug): residual efficacy on four substrates
We investigated the residual efficacy of four insecticide formulations used in Chagas disease vector control campaigns: cyfluthrin 12.5% suspension concentrace (SC), lambda-cyhalothrin 10% wettable powder (WP), deltamethrin 2.5% SC, and 2.5% WP on four types of circular blocks of wood, straw with mud, straw with mud painted with lime, and mud containing 5% o
Memórias do Instituto Oswaldo Cruz. Publicado em: 2003-10
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22. Telhas onduladas a base de cimento portland e residuos de Pinus caribaea
Pencil manufacture generates a large amount of wastes. These residues do not have an useful destination. They are usually burned provoking air pollution and energy loss. However, this wood residues could be used as a raw-material in cement based products. A studied composite demonstrated advantageous characteristics as lightweight and thermal insulation. The
Publicado em: 2000