Estudo da reciclagem mecânica de poli (cloreto de vinila) - PVC - proveniente deresíduos da construção civil
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Data
2008-12-16
Autores
Darbello, Sabrina Moretto [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Em estudo realizado no Aterro Municipal de Inertes de Sorocaba determinou-se que a cidade envia ao aterro diariamente cerca de 500 toneladas de entulho, separando mensalmente 160 toneladas de recicláveis, sendo 1,4 toneladas resíduos de PVC rígido, principalmente tubos. Amostras desses tubos foram coletadas, moídas em duas granulometrias diferentes, lavadas, secas e caracterizados seus efluentes. Obteve-se 8,5% de teor de cinzas para os tubos moídos, o que serviu de base para a determinação da formulação do composto baseado em resina virgem: 84% de resina, 13,4% de Ca 'CO IND. 3', 1,9% de estabilizante e 0,7% de Ti 'O IND. 2'. Assim, três conjuntos de amostras (baseada em resina virgem e em resíduos de tubos moídos em duas granulometrias diferentes) foram submetidos a ensaios de tração, impacto, cor e de propriedades superficiais (resistividade, rugosidade, desgaste, dureza, XPS, infravermelho), sendo estes realizados antes e após tratamento a plasma com 'SF IND. 6' otimizado (80W,2 minutos e 100 mTorr), visando tornar e manter a amostra hidrofóbica. Os resultados de tração, impacto e dureza indicaram que a reciclagem não provocou alterações significativas. Já os resultados das propriedades superficiais apontam que os tratamentos realizados no material reciclado tendem a aproximar seus valores dos obtidos para o material virgem sem tratamento. Neste sentido, o material de granulometria grossa fornece resultados geralmente melhores. Isso indica que uma moagem menos demorada, além de gerar menos sólidos nos efluentes, origina um material menos susceptível a degradação durante o processamento.
A study carried out at the Municipal Inert Landfill's Sorocaba, it was determined that the city sends to the landfill around 500 tons of rubble daily, separating 160 tons of recyclabe material monthly, of which 1.4 tons are rigid PVC residues, mainly in the form of tubes. Samples of these tubes were collected, ground in two different mesh sizes, washed, dried and its effluent characterized. The ground tubes contained 8.5% ash, which formed the basis to determine the formulation of the compound bases on virgin resin, 13.4% of Ca 'CO IND. 3', 1,9% of stabilizes and 0,7% de Ti 'O IND. 2'. So, three sets of samples (based on virgin resin and based on tubes ground in two different sizes) were submitted to tests of tensile, impact, color and tests of surface properties (resistivity, roughness, wear, hardness, XPS, infrared), the last ones being carried out before and after the 'SF IND. 6' plasma treatment optimized (80W,2 minutos e 100 mTorr) to make and maintain the sample hydrophobic. The results of tensile, impact and hardness tests indicated that recycling did not cause significant changes. The results of surface property measurements show that the surface treatments carried on in the recycled material draw their values towards those obtained for the virgin material without treatament. In this sense, the material originating from tubes ground to a coarse grain size generally offer better results. This indicates that a short grinding, produces less solid effluent washing and gives rise to material a less susceptible to degradation during the processing.
A study carried out at the Municipal Inert Landfill's Sorocaba, it was determined that the city sends to the landfill around 500 tons of rubble daily, separating 160 tons of recyclabe material monthly, of which 1.4 tons are rigid PVC residues, mainly in the form of tubes. Samples of these tubes were collected, ground in two different mesh sizes, washed, dried and its effluent characterized. The ground tubes contained 8.5% ash, which formed the basis to determine the formulation of the compound bases on virgin resin, 13.4% of Ca 'CO IND. 3', 1,9% of stabilizes and 0,7% de Ti 'O IND. 2'. So, three sets of samples (based on virgin resin and based on tubes ground in two different sizes) were submitted to tests of tensile, impact, color and tests of surface properties (resistivity, roughness, wear, hardness, XPS, infrared), the last ones being carried out before and after the 'SF IND. 6' plasma treatment optimized (80W,2 minutos e 100 mTorr) to make and maintain the sample hydrophobic. The results of tensile, impact and hardness tests indicated that recycling did not cause significant changes. The results of surface property measurements show that the surface treatments carried on in the recycled material draw their values towards those obtained for the virgin material without treatament. In this sense, the material originating from tubes ground to a coarse grain size generally offer better results. This indicates that a short grinding, produces less solid effluent washing and gives rise to material a less susceptible to degradation during the processing.
Descrição
Palavras-chave
Construção civil, Materiais granulados, Reciclagem, Plasma (Gases ionizados), Mechanical recycling
Como citar
DARBELLO, Sabrina Moretto. Estudo da reciclagem mecânica de poli (cloreto de vinila) - PVC - proveniente deresíduos da construção civil. 2008. 144 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciência de Bauru, 2008.