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Título: ON THE DEVELOPMENT OF A CRUSHING AND GRINDING FLOWSHEET APPLIED TO AGGREGATES FROM THE BUILDING CONSTRUCTION AND THEIR APPLICATION
Autor: ELIVONE LOPES DA SILVA
Instituição: PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO - PUC-RIO
Colaborador(es):  MAURICIO LEONARDO TOREM - ADVISOR
Nº do Conteudo: 33324
Catalogação:  20/03/2018 Idioma(s):  PORTUGUESE - BRAZIL
Tipo:  TEXT Subtipo:  THESIS
Natureza:  SCHOLARLY PUBLICATION
Nota:  Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
Referência [pt]:  https://www.maxwell.vrac.puc-rio.br/colecao.php?strSecao=resultado&nrSeq=33324@1
Referência [en]:  https://www.maxwell.vrac.puc-rio.br/colecao.php?strSecao=resultado&nrSeq=33324@2
Referência DOI:  https://doi.org/10.17771/PUCRio.acad.33324

Resumo:
In Brazil the system of recycling of solid waste generated by the works of construction and demolition are still incipient. However such residues grow on a large scale while natural aggregates become scarcer. In order to preserve natural resources; contribute to the cleanliness of the cities; save the rivers, dams, uncultivated land and sewage; and alleviate the impact on landfills and dumps, we have the best option for recycling and processing of the waste. The pioneering program in Brazil, in the city of Belo Horizonte in recycling, was used as reference in drafting the resolution of the National Environmental Council (CONAMA), number 307 of July 5, 2002, which established rules and procedures to be adopted for the management of civil construction waste in national territory. The according to CONAMAS s classification the debris, may belong to classes A, B, C and D, the council decided the municipalities are responsible for drawing up plans of the Integrated Management of Waste and the Integrated Management of Civil Construction. The CDW or rubble as it is popularly called is all waste from the construction, renovations, repairs and demolition of building works and resulting from the excavation and ground preparation. This debris after sorting can be benefited suffering physical changes, amendments shape and size of the rubble, producing differentiated grain size. Each grain size has specific use within in building construction, and then the generated products after the community can be used overall as subfloor and not structural concrete in accordance with the technical standards. The purpose of this study was to characterize technologically recycled mineral waste through particle size distribution, where the CDW presented grading curve within the technical standards, the DRX test was essential to know the mineralogical composition this rubble, which were similar to those present in natural aggregates except for the strong presence gypsum that affect the compressive strength and modulus of elasticity, the diversified mineral composition of the samples showed that residues have high concentration of clay content and friable materials, high rate of water absorption content, and rough surface texture, even with characteristics medium natural aggregate. After the technological characterization was essential develop objective beneficiation flowcharts to CDW, with goal to raise the quality of the products generated, and develop a standard for the processing of CDW. The samples were used for preparation of specimens with CDW fractions different in the concrete mix, as results of the mechanical tests it was observed that the fractions of up to 30 per cent of recycled aggregate had good resistance to compression and elastic modulus, but the same result was not possible for the fractions that had over 50 per cent of recycled aggregate in the concrete mix.

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