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Authors
Abstract(s)
Diante da necessidade de ações para o desenvolvimento sustentável, o presente trabalho aborda duas problemáticas, sendo elas: a indústria da construção civil como uma importante fonte poluidora e a dificuldade dos municípios no gerenciamento dos resíduos municipais gerados pela população. Dessa forma, é realizado o estudo do betão incorporado com quantidades pré-definidas de resíduos orgânicos, aplicado na produção de blocos comerciais sem função estrutural, como uma proposta de um material contribuinte para a construção sustentável. O composto orgânico foi fornecido pela empresa Resíduos do Nordeste e a composição do bloco de referência é produzida pela empresa Pavimir. Foram produzidos provetes com as percentagens de 0%, 5%, 10% e 15% de resíduo em substituição à areia, ao cimento e em acréscimo à composição sem retirada de nenhum outro material. Observou-se uma interferência importante da matéria orgânica na estrutura do betão, sendo descartada a possibilidade da presença do resíduo em quantidades superiores a 5%. A retirada das partículas mais finas por meio de peneiramento e o pré-umedecimento do resíduo auxiliou no melhor desempenho dos provetes quanto à resistência à compressão. Nesse quesito, as menores reduções em relação ao provete de referência (CRef) foram encontradas para as composições com 5% de substituição do cimento (CR5) e 5% de acréscimo de resíduo (+R5), para as quais foram realizados ensaios complementares. A consistência do betão nas composições avaliadas é seca. CR5 apresentou a menor massa volúmica e menor taxa de absorção de água entre as três composições e houve redução da resistência à tração em relação à CRef, nas percentagens de 7,77% e 17,29% aos 28 dias para CR5 e +R5, respectivamente. A utilização da incorporação de resíduos orgânicos na produção de blocos apresenta-se como uma solução significativamente vantajosa a nível ambiental e econômico, representando uma alternativa adicional para a destinação dos resíduos orgânicos municipais e influenciando na competitividade das empresas que fabricam e comercializam tais elementos, visto a relevância do tema no cenário atual.
Faced with the need for actions related to sustainable development, the present work addresses two issues, namely: the construction industry as an important polluting source and the difficulty of cities in managing municipal waste generated by the population. Thus, the study of concrete incorporated with pre-defined amounts of organic waste is carried out, applied in the production of non-load bearing commercial blocks, as a proposal for a material that contributes to sustainable construction. Organic compost was supplied by the company Resíduos do Nordeste and the composition of the reference block is given by the company Pavimir. Samples were produced with the rates of 0%, 5%, 10% and 15% of waste in substitution for sand, cement and in addition to the composition without removing any other material. There was an important interference of organic matter in the concrete structure, discarding the possibility of the presence of the waste in quantities greater than 5%. Removal of the finer particles through sieving and the pre-wetting of the waste helped in the better performance of the samples in terms of compressive strength. In this regard, the smallest reductions in relation to the reference sample (CRef) were found for compositions with 5% of cement replacement (CR5) and 5% of waste addition (+R5) for which complementary test were performed. Concrete consistency in the evaluated compositions is dry. CR5 had the lowest density and lowest water absorption rate among the three compositions and there was a reduction in tensile strength compared CRef, in rates of 7,77% and 17,29% at 28 days of age for CR5 and +R5, respectively. The use of incorporating organic waste in the production of blocks means an advantageous solution at an environmental and economic level, representing an additional alternative for the disposal of municipal organic waste and influencing the competitiveness of companies that manufacture and sell such elements, given the relevance of the theme in the current scenario.
Faced with the need for actions related to sustainable development, the present work addresses two issues, namely: the construction industry as an important polluting source and the difficulty of cities in managing municipal waste generated by the population. Thus, the study of concrete incorporated with pre-defined amounts of organic waste is carried out, applied in the production of non-load bearing commercial blocks, as a proposal for a material that contributes to sustainable construction. Organic compost was supplied by the company Resíduos do Nordeste and the composition of the reference block is given by the company Pavimir. Samples were produced with the rates of 0%, 5%, 10% and 15% of waste in substitution for sand, cement and in addition to the composition without removing any other material. There was an important interference of organic matter in the concrete structure, discarding the possibility of the presence of the waste in quantities greater than 5%. Removal of the finer particles through sieving and the pre-wetting of the waste helped in the better performance of the samples in terms of compressive strength. In this regard, the smallest reductions in relation to the reference sample (CRef) were found for compositions with 5% of cement replacement (CR5) and 5% of waste addition (+R5) for which complementary test were performed. Concrete consistency in the evaluated compositions is dry. CR5 had the lowest density and lowest water absorption rate among the three compositions and there was a reduction in tensile strength compared CRef, in rates of 7,77% and 17,29% at 28 days of age for CR5 and +R5, respectively. The use of incorporating organic waste in the production of blocks means an advantageous solution at an environmental and economic level, representing an additional alternative for the disposal of municipal organic waste and influencing the competitiveness of companies that manufacture and sell such elements, given the relevance of the theme in the current scenario.
Description
Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná
Keywords
Blocos Betão Resíduos orgânicos Construção sustentável