utilização do planejamento experimental em rede simplex no estudo de resíduo de rocha ornamental como filler para obtenção de máxima compacidade use of simplex lattice experimental design in the study of ornamental rock waste as filler to obtain maximum compaction

Clicks: 261
ID: 145880
2011
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Abstract
A utilização de agregados industrializados vem crescendo ao longo dos anos para atender a grande demanda da construção civil devido ao crescimento econômico do país. O objetivo deste trabalho foi utilizar o planejamento experimental em Rede Simplex para avaliar o efeito da adição do resíduo de rocha ornamental como filler na composição de misturas ternárias (brita 0, pó de pedra e resíduo), que levem a máxima compacidade (densidade seca aparente máxima). Foram tomados dezesseis pontos experimentais, cujos teores dos materiais utilizados variaram de 0 a 100%. O modelo em rede simplex cúbico completo apresentou melhor ajuste aos resultados experimentais, o qual resulta em respostas estatisticamente mais adequadas para as composições estudadas. A superfície de resposta gerada indicou que a densidade seca aparente máxima de 2,0 g/cm³ foi obtida para a composição ternária: 63% de brita 0/17% de pó de pedra/20% de resíduo de rocha ornamental. Portanto, o uso de resíduo de rocha ornamental como filler em agregados para a construção civil pode ser uma alternativa viável para deposição final deste abundante resíduo de forma ambientalmente correta.
The use of industrial aggregates has grown over the years to meet the great demand of the civil construction due to the country's economical growth. The aim of this work was to use the experimental design in Simplex Lattice to evaluate the effect of the addition of ornamental rock waste as filler in the composition of ternary mixtures (crushed rock 0, stone powder, rock waste), leading to maximum compaction (maximum apparent dry density). Sixteen experimental points were taken, whose contents of the used materials ranged from 0 to 100%. The complete cubic simplex model showed to best fit to the experimental results, which results in more statistically appropriated responses to the studied compositions. The response surface generated indicated that the maximum apparent dry density (2.0 g/cm³) was obtained for the ternary composition: 63% crushed rock 0/ 17% stone powder/ 20% ornamental rock waste. Therefore, the use of ornamental rock waste as filler in aggregates for civil construction can be a viable alternative for final deposition in an environmental correct way.
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destefani2011cermicautilizao Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors A. Z. Destefani, J. N. F. Holanda
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Journal Zootaxa
Year 2011
DOI
10.1590/S0366-69132011000400018
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132011000400018
Keywords
experimental design filler civil engineering (general)

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