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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An?lise de microestrutura e de caracter?sticas geot?cnicas de misturas de res?duo de polimento de porcelanato e solo / Analisys of microestructure and geotechnical properties of blends of porcelain tile polishing residue and soil

Ara?jo, Silvia Cristina Justo Fernandes Nobre de 04 March 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:41:44Z No. of bitstreams: 1 SilviaCristinaJustoFernandesNobreDeAraujo_DISSERT.pdf: 3441835 bytes, checksum: 1aa9a65e0cb3f0cda2f8f9e5d6042a7e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-18T18:13:15Z (GMT) No. of bitstreams: 1 SilviaCristinaJustoFernandesNobreDeAraujo_DISSERT.pdf: 3441835 bytes, checksum: 1aa9a65e0cb3f0cda2f8f9e5d6042a7e (MD5) / Made available in DSpace on 2016-07-18T18:13:15Z (GMT). No. of bitstreams: 1 SilviaCristinaJustoFernandesNobreDeAraujo_DISSERT.pdf: 3441835 bytes, checksum: 1aa9a65e0cb3f0cda2f8f9e5d6042a7e (MD5) Previous issue date: 2016-03-04 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O Brasil ? um pa?s em desenvolvimento dotado de imensa quantidade de recursos naturais que necessitam ser preservados a fim de que o crescimento econ?mico seja associado ao desenvolvimento sustent?vel. A gest?o de res?duos s?lidos ? um desafio cont?nuo para as ind?strias no Brasil, incluindo as que produzem materiais cer?micos. Neste trabalho, foi estudada a utiliza??o de Res?duo de Polimento de Porcelanato (RPP) para a execu??o de aterros compactados. O RPP ? um res?duo em consist?ncia de lama gerado durante a etapa de polimento do material cer?mico porcelanato, composto por material pulverulento desprendido da pe?a cer?mica polida, por material abrasivo gasto e por ?gua de resfriamento e lavagem. O RPP utilizado nesta pesquisa foi coletado em empresa localizada no munic?pio de Conde/PB e ser? estudado em misturas com solo areno-argiloso, para a execu??o de aterros. Foram realizados ensaios de caracteriza??o e de resist?ncia mec?nica com o solo puro, o RPP puro e misturas de solo e res?duo nas propor??es de 5%, 10%, 15% e 20% da adi??o de RPP em massa seca de solo. Os ensaios de caracteriza??o realizados em todas as amostras foram: massa espec?fica dos s?lidos, granulometria conjunta, granulometria a laser, limites de Atterberg, fluoresc?ncia de raios X, difra??o de raios X, microscopia eletr?nica de varredura e compacta??o. As amostras tamb?m foram compactadas e submetidas ainda a ensaios de cisalhamento direto e provas de carga em placa. Este ?ltimo ensaio foi realizado em placa circular de 30 cm de di?metro, sobre amostra moldada em caixa met?lica no laborat?rio de Mec?nica dos Solos da UFRN. A capacidade de carga do aterro foi avaliada para as amostras compactadas de solo puro e da mistura de 5, previamente selecionada. Todos os ensaios de resist?ncia mec?nica foram desenvolvidos na condi??o inundada, a fim de minimizar poss?veis influ?ncias de suc??o matricial. Os resultados dos ensaios de caracteriza??o apontam que o RPP ? um material fino, com granulometria inferior a 0,015 mm, rico em s?lica e alumina, com part?culas de formato angular. O solo em estudo ? uma areia argilosa, caracterizado como later?tico, com altos teores de alumina e ?xido de ferro, e com part?culas de formato arredondado. Tanto o solo puro quanto as misturas foram identificados como materiais fracamente pl?sticos, enquanto o res?duo se mostrou medianamente pl?stico. Os resultados dos ensaios de cisalhamento direto apontam que a adi??o de res?duo no solo n?o provocou varia??es significativas nos valores de ?ngulo de atrito interno das misturas, em rela??o ao solo puro, mas, no que diz respeito aos valores de pico da resist?ncia ao cisalhamento, ocorreu uma tend?ncia a um decr?scimo na resist?ncia das misturas com o aumento da quantidade de res?duo adicionada. Tanto o solo puro quanto a mistura de 5% apresentaram ruptura por puncionamento, para a prova de carga em placa. O resultado da prova de carga em placa mostrou tamb?m que a mistura de 5% apresentou tens?o admiss?vel 44% maior do que o solo puro. Os recalques da Mistura de 5% tamb?m foram menores do que os do solo puro. / Brazil is a country in development, rich in natural resources. In order to grow sustainably, it is necessary to Brazil to preserve its environment, which is an expressive challenge, especially to industries, such as those producing ceramic materials. This study was developed using Porcelain Tile Polishing Residue (RPP) in blends with soil to build compacted fills. This residue is a slurry generated during the polishing process of porcelain tiles and contains powdery material from the polished tile, the abrasives used during the process and cooling water. The RPP was collected from a private company located in Conde/PB and it was mixed with a sandy-clayey soil, to build the fills. Laboratorial tests were conducted with pure soil, pure RPP and blends in proportions of 5%, 10%, 15% and 20% of RPP in addition to the dry mass of pure soil. The Chemical and Physical Characterization tests performed were: specific solid weight, grain size distribution, laser analysis of grain size distribution, Atterberg limits, X ray fluorescence, X ray diffraction, scanning electron microscopy and soil compaction,. The materials and blends were also compacted and direct shear tests and plate load tests were performed. Plate load tests were conducted using a circular plate with 30 cm diameter, on specimens of pure soil and 5% blend, compacted in a metallic box inside the Soil Mechanics Laboratory of the Federal University of Rio Grande do Norte, Brazil. Both mechanical tests performed were conducted under inundated conditions, willing to reduce the influence of soil suction. An evaluation of the results of the tests performed shows that RPP is a fine material, with grain size distribution smaller than 0,015mm, composed mainly of silica and alumina, and particles in angular shape. The soil was characterized as a clayey sand, geologically known as a lateritic soil, with high percentages of alumina and iron oxide, and particles with rounded shape. Both the Soil and the blends presented low plasticity, while the residue showed a medium plasticity. Direct shear tests showed that the addition of RPP did not cause major changes into blends? friction angle data, however, it was possible to note that, for the proportions studied, that is a tendency of obtain lower shear stresses for higher percentages of RPP in the blends. Both pure soil and 5% mixture showed a punching disruption for the Plate load test. For this same test, the allowable stress for 5% mixture was 44% higher than the pure soil, and smaller vertical settlement results for all stresses.

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