Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-22T23:54:36Z No. of bitstreams: 1 MarcioGleybsonDaSilvaBezerra_DISSERT.pdf: 1420756 bytes, checksum: 8d219d0675a06760794340515ed8a28f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-26T21:50:40Z (GMT) No. of bitstreams: 1 MarcioGleybsonDaSilvaBezerra_DISSERT.pdf: 1420756 bytes, checksum: 8d219d0675a06760794340515ed8a28f (MD5) / Made available in DSpace on 2016-02-26T21:50:40Z (GMT). No. of bitstreams: 1 MarcioGleybsonDaSilvaBezerra_DISSERT.pdf: 1420756 bytes, checksum: 8d219d0675a06760794340515ed8a28f (MD5) Previous issue date: 2014-08-28 / O Brasil ? o segundo maior produtor de mandioca do mundo, da qual a maior parte da produ??o ? utilizada para fabricar farinha e f?cula, gerando grande quantidade de res?duo, a manipueira. Em geral, esse res?duo ? descartado diretamente no solo e cursos d??gua, causando s?rios impactos ambientais. Diante disto, objetivou-se avaliar o uso de ?gua residu?ria da mandioca (manipueira) como fertilizante org?nico em pasto de Brachiaria brizantha cv. Marandu. O experimento foi conduzido no Campus de Maca?ba da Universidade Federal do Rio Grande do Norte. O delineamento experimental foi em blocos ao acaso com seis tratamentos e quatro repeti??es. Os tratamentos utilizados foram doses crescentes de manipueira (0; 15; 30; 60 e 120 m? ha-1 ) e um tratamento com aduba??o mineral (AM) na forma de NPK (140:30:120 kg ha-1 ). Foram realizados tr?s cortes com intervalo de 60 dias. As vari?veis avaliadas foram: altura da planta; ac?mulo de componentes morfol?gicos da forragem; Intercepta??o de Luz (IL); ?ndice de ?rea Foliar (IAF); Clorofila Total (CT); Produ??o de Mat?ria Seca (PMS). A produ??o de mat?ria seca na dose de 120 m? ha-1 teve um acr?scimo quantitativo, totalizando uma produ??o de 2796 kg ha -1 de MS no segundo corte, proporcionando um aumento de 493% em rela??o a testemunha, e o efeito residual observado no terceiro corte promoveu um acr?scimo de 100 % quando comparado a ?0? m? ha-1 . Comparando-se a PMS obtida com a utiliza??o de AM e os demais tratamentos observou-se que no segundo corte ela foi equivalente ? dose de 120 m? ha-1 e no terceiro corte a equival?ncia foi com as doses 60 e 120 m? ha-1 . Para as vari?veis altura da planta, IL, IAF, CT e Massa de Folhas a adi??o de manipueira no solo promoveu um aumento linear positivo para os tr?s cortes. Por?m, com a AM o IAF se mostrou superior aos demais tratamentos. A massa de colmo atingiu sua maior produ??o (838 kg ha-1 de MS) no segundo corte quando se utilizou a dose de 120 m? ha-1 . Na massa de material morto, no segundo e terceiro cortes, verificou-se resposta linear positiva totalizando aumento de 322 e 452% respectivamente, em rela??o ? dose ?0? m? ha-1 . O uso da manipueira apresentou efeito herbicida para a vari?vel massa das indesej?veis, resultando em resposta linear negativa diminuindo a quantidade com o aumento das doses do res?duo. A manipueira pode ser utilizada como fertilizante org?nico em pastagem de Brachiaria brizantha cv. Marandu visando melhorias nas caracter?sticas produtivas, pois promoveu aumentos significativos na maioria das vari?veis estudadas, principalmente na dose de 120 m? ha-1. . / Brazil is the world's second largest producer of cassava, which most of the production is used to make flour and starch, generating large amounts of waste, cassava. In general, this waste is disposed of directly into the soil and waterways, causing serious environmental impacts. In view of this, the aim of this work was to evaluate the use of cassava wastewater water (cassava) as organic fertilizer in Brachiaria brizantha pasture. Marandu. The experiment was conducted at the Campus Maca?ba the Federal University of Rio Grande do Norte. The treatments were increasing rates of cassava, applied to the soil as organic fertilizer. The experimental design was a randomized block design with six treatments and four replications. The treatments consist of cassava doses (0, 15, 30, 60 and 120 m? ha- 1 ) and a treatment with mineral fertilizer (AM) in the form of NPK (140: 30: 120 kg ha-1 ). Three cuts with an interval of 60 days were carried out. The variables evaluated were: plant height; accumulation of morphological components of fodder; Trapping Light (IL); Leaf Area Index (LAI); Total chlorophyll (CT); Feature Production Seca (PMS). The dry matter production at a dose of 120 m?ha-1 had a quantitative increase, with a total production in 2796 kg ha-1 DM in the second cut, providing an increase of 493% compared to control, and the residual effect observed in the third cut caused a 100% increase compared to 0 m? ha-1 . Comparing the PMS obtained with the use of AM and other treatments it was observed that it was the second cut equivalent to a dose of 120 m? ha-1 and the third equivalence has been cut at doses 60 and 120 m?ha-1. For the variables plant height, IL, IAF, CT and leaves Mass adding cassava in the soil promoted a positive linear increase for the three cuts. However, with the AM the IAF was superior to the other treatments. The thatched mass reached its highest production (838 kg ha-1 DM) in the second cut when using a dose of 120 m?ha-1 . In dead material mass in the second and third sections, there was increased linearly increased total of 322 and 452% respectively, compared to a dose of 0 m?ha-1 . The use of cassava showed herbicidal effect for the variable mass of the undesirable negative linear response resulting in decreasing the amount of residue with increasing doses. Manipueira can be used as organic fertilizer in Brachiaria brizantha cv. Marandu for improvements in the productive characteristics, as promoted significant increases in 8 most of the variables studied, especially at a dose of 120 m?ha-1 . This benefits the environment by being alternative for disposal of cassava.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-22T00:17:59Z No. of bitstreams: 1 JoelNogueiraGoncalves_TESE.pdf: 6906770 bytes, checksum: 9b8cff5d1a328939a9f33db88bfb62ff (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-22T22:13:02Z (GMT) No. of bitstreams: 1 JoelNogueiraGoncalves_TESE.pdf: 6906770 bytes, checksum: 9b8cff5d1a328939a9f33db88bfb62ff (MD5) / Made available in DSpace on 2016-03-22T22:13:02Z (GMT). No. of bitstreams: 1 JoelNogueiraGoncalves_TESE.pdf: 6906770 bytes, checksum: 9b8cff5d1a328939a9f33db88bfb62ff (MD5) Previous issue date: 2015-02-24 / A ind?stria de isoladores el?tricos cer?micos utiliza mat?rias primas nobres como argilas de queima branca silicosas e ou aluminosas, com a finalidade de oferecer plasticidade a massa e contribuir nas propriedades el?tricas e mec?nicas requeridas ao produto, e o feldspato com a fun??o de fundente. Na composi??o das massas a literatura indica que a argila participa com percentuais entre 20 e 32, e o feldspato de 8 a 35, sendo materiais de custos significativos. Nesta pesquisa foi realizada a substitui??o total da argila comercial, pela argila de queima branca da regi?o de Santa Luzia no sul da Bahia e substitui??o parcial do feldspato pelo res?duo de cinza da queima da casca de caf? conilon, da regi?o extremo sul da Bahia. O objetivo das substitui??es destes materiais foi comprovar sua viabilidade t?cnica, bem como focar aten??o da ind?stria cer?mica para o embri?o de p?lo cer?mico existente na regi?o sul e extremo sul da Bahia, que possui reservas significativas de materiais nobres como a argila de queima branca de Santa Luzia, caulins, quartzos e feldspatos, al?m de gerar volume significativo do fundente alternativo, res?duo de cinza de queima da casca de caf? conilon. A argila Santa Luzia ? mat?ria prima nobre cuja atual aplica??o comercial ? na produ??o de telhas brancas. O fundente res?duo de cinza de casca de caf? ? descartado nos locais de produ??o com impacto ambiental negativo. Foram utilizados diagramas de fase e delineamento de misturas para otimiza??o e redu??o de custos na pesquisa. Os resultados comprovaram as expectativas de obten??o de isoladores el?tricos cer?micos com a argila de queima branca de Santa Luzia, e substitui??o de at? 35,4 % do feldspato, por res?duo tratado de cinza de queima de casca de caf? conilon. O delineamento de misturas que apresentou os melhores resultados foi para a formula??o com percentuais de: argila 26,4 a 30,4%; caulim 14,85 a 17,1%; feldspato de 12,92 a 16,96%; res?duo R2 de 7,08 a 9,2% e quartzo de 32,5 a 38,75%, percentuais em rela??o ? massa total da mistura. Os melhores resultados indicados pelo modelo do delineamento de misturas foram; porosidade 0,2 a 1,4%, absor??o de ?gua de 0,1 a 0,7%, resist?ncia mec?nica ? flex?o de 35 a 45 MPa, rigidez diel?trica de 35 a 41 kV/cm, resistividade transversal de 8x109 a 2,5x1010 ?.cm e a constante diel?trica ? /?0 de 7 a 10,4, atendendo aos par?metros para fabrica??o de isoladores el?tricos cer?micos de baixa e m?dia tens?o. / The electrical ceramic insulators industry, uses noble raw materials such as siliceous and aluminous clays of white burning, in order to provide plasticity of the mass and contribute to electrical and mechanical properties required of the product, and feldspar with the flux function In literature references the composition of the masses indicates that the clay participates in percentage between 20 and 32, and feldspar 8 to 35, these materials have significant cost. In this research was performed the total replacement of commercial clay, for white burning clay from Santa Luzia region in southern Bahia and partial replacement of feldspar by ash residue of husk conilon coffee burning, from extreme south of Bahia. The objective of replacement these raw materials is to aver its technical feasibility and call attention for the embryo pole of ceramic industry for the existing in the south and extreme south of Bahia, which has significant reserves of noble raw materials such as clay white burning, kaolin, quartz and feldspar, and generates significant volume of gray husk conilon coffee as alternate flux. Clay Santa Luzia is prima noble material whose current commercial application is the production of white roofing. The residue of coffee husk ash is discarded near of production sites and is harmful to the environment. Phase diagrams and statistic design of experiments, were used for optimization and cost savings in research. The results confirmed the expectations of obtaining electrical ceramic insulators, with white burning clay of Santa Luzia and partial replacement up to 35.4% of feldspar, by treaty residue of conilon ash coffee husk burning. The statistic design that showed best results was for formulation with percentages of: clay 26.4 to 30.4%; kaolin 14.85 to 17.1%; feldspar 12.92 to 16.96%; R2 residue 7.08 to 9.2% and Quartz 32.5 to 38.75%, relative to the total mass of the mixture. The best results indicated; 0.2 to 1.4% apparent porosity , water absorption 0.1 to 0.7%, flexural strength 35 to 45MPa , dielectric strength 35-41 kV/cm , the transverse resistivity 8x109 2.5x1010 ?.cm and for the dielectric constant ?/?0 7 to 10.4, specification parameters for manufacturing ceramic electrical insulators of low and medium voltage.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-01T00:12:18Z No. of bitstreams: 1 RavennaMariaMonteiroBarros_DISSERT.pdf: 14068389 bytes, checksum: 8ee91e6f3ca8a944dc4350382caa62de (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-06T00:06:40Z (GMT) No. of bitstreams: 1 RavennaMariaMonteiroBarros_DISSERT.pdf: 14068389 bytes, checksum: 8ee91e6f3ca8a944dc4350382caa62de (MD5) / Made available in DSpace on 2016-04-06T00:06:40Z (GMT). No. of bitstreams: 1 RavennaMariaMonteiroBarros_DISSERT.pdf: 14068389 bytes, checksum: 8ee91e6f3ca8a944dc4350382caa62de (MD5) Previous issue date: 2015-04-20 / Durante suas opera??es, a ind?stria petrol?fera gera uma grande quantidade de res?duos, dentre eles, o cascalho de perfura??o. O controle dos impactos ambientais causados devido a esses res?duos representa um grande desafio. Tais impactos podem ser minimizados quando ? dado um gerenciamento adequado, sendo convenientemente tratados e corretamente dispostos ou quando reciclados. As propriedades dos materiais cer?micos podem ser fortemente influenciadas quando adicionado um res?duo ? sua composi??o. Este trabalho tem como objetivo estudar a incorpora??o do res?duo de cascalho de perfura??o de po?os de petr?leo na massa padr?o para fabrica??o de cer?mica vermelha proveniente de uma ind?stria cer?mica do munic?pio de S?o Gon?alo do Amarante/RN. O sucesso da incorpora??o pode minimizar custos na produ??o das pe?as cer?micas e diminuir os impactos ambientais gerados pelo res?duo. As mat?rias-primas utilizadas foram coletadas e caracterizadas, sendo formuladas com os percentuais de 0, 20 e 40% em substitui??o de massa por res?duo, foram sinterizadas nas temperaturas de 900, 1.010 e 1.120 ?C utilizando patamares de queima de 30min, 1h30min e 2h30min com base em um planejamento fatorial 2?. Em seguida amostras foram submetidas aos ensaios de Absor??o de ?gua, Retra??o Linear de Queima, Tens?o de Ruptura ? Flex?o, Porosidade Aparente, Massa Especifica Aparente e Microscopia Eletr?nica de Varredura (MEV) da se??o de ruptura. Os resultados mostraram que ? poss?vel a utiliza??o do res?duo para a fabrica??o de produtos da cer?mica vermelha (telhas, tijolos maci?os e tijolos furados) substituindo-se a argila em at? 40%, atendendo aos requisitos exigidos pela norma e pela literatura para as propriedades tecnol?gicas do produto final. / During its operations, the oil industry generates a lot of waste, including gravel from drilling. Control of environmental impacts caused by this waste represents a major challenge. Such impacts can be minimized when it is given an appropriate management by being properly treated and properly disposed or recycled. The properties of these materials can be greatly influenced when a waste is added to its composition. This work aims to study the incorporation of gravel waste oil-well drilling in the standard body for production of red ceramic from a ceramic industry in S?o Gon?alo do Amarante / RN. The success of the incorporation can minimize costs in the production of ceramic pieces and reduce the environmental impacts caused by waste. The raw materials used were collected, characterized, and formulated with the percentages of 0%, 20% and 40% by weight of substitution of residue were synthesized at temperatures of 900, 1.010 and 1.120 ?C using 30 minute firing intervals, 1 hour and 30min and 2 hours and 30 minutes, based on a factorial design 2?. Samples were then subjected to the tests of Water Absorption, Linear Retraction Firing, Flexural Rupture Strength, Apparent Porosity and Apparent Specific mass and Scanning Electron Microscopy (SEM) of break section. The results showed that the use of the residue for the manufacture of the ceramic products is possible (tiles, bricks and massive hollow bricks) replacing the clay to 40%, meeting the requirements of the standard and the literature for the technological properties of the final product.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-14T20:19:26Z No. of bitstreams: 1 EriemAllyneMedeirosAzevedo_DISSERT.pdf: 6333576 bytes, checksum: 4fb198cb10ff3117dbd15b989910b143 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-15T23:30:13Z (GMT) No. of bitstreams: 1 EriemAllyneMedeirosAzevedo_DISSERT.pdf: 6333576 bytes, checksum: 4fb198cb10ff3117dbd15b989910b143 (MD5) / Made available in DSpace on 2016-06-15T23:30:13Z (GMT). No. of bitstreams: 1 EriemAllyneMedeirosAzevedo_DISSERT.pdf: 6333576 bytes, checksum: 4fb198cb10ff3117dbd15b989910b143 (MD5) Previous issue date: 2015-12-17 / Embora que eficiente do ponto de vista t?cnico, as camadas de argamassa que constituem o revestimento tradicional de alvenaria (chapisco, embo?o e reboco) apresentam-se em contradi??o com as novas tecnologias construtivas e m?todos mais eficientes de consumo e racionaliza??o da obra. Do ponto de vista ambiental, o aproveitamento de res?duos em novos comp?sitos para a constru??o civil tem sido uma vertente de estudos em crescimento na comunidade cient?fica, podendo vir a ser uma solu??o econ?mica, em alguns casos. Assim sendo, essa pesquisa prop?e o desenvolvimento de uma argamassa para Revestimento Decorativo Monocamada (RDM), para aplica??o em fachadas, produzida em canteiro, incorporando res?duo de vidro temperado (RVT) na matriz ciment?cia, como substituto parcial do agregado. Para tanto, adotou-se a rela??o aglomerante/agregado de 1:6 (em volume), ?ndice de consist?ncia de 250mm ? 20, teores de substitui??o da areia por res?duo de vidro em 20%, 50% e 80%, e rela??o ?gua/cimento vari?vel em diversos tra?os. Foram utilizados dois aditivos, um polim?rico, ? base de estireno butadieno, e outro qu?mico, al?m da adi??o mineral de s?lica ativa e de pigmento inorg?nico nas cores vermelho, amarelo e azul. Foram realizados ensaios mec?nicos para a massa no estado fresco e endurecido, assim como para o revestimento aplicado sobre alvenaria, de modo a demonstrar a viabilidade do material. Al?m disso, verificou-se a adequabilidade do RDM ao ambiente constru?do, por meio de ensaios t?rmicos. Os resultados demonstram a exequibilidade do RDM proposto com valores expressivamente superiores, quando comparado ?s normatiza??es. Assim sendo, o estudo apresenta-se a comunidade cient?fica como um incentivo ao uso das inova??es tecnol?gicas na constru??o, aumentando o leque de alternativas dispon?veis para a produ??o habitacional, com a proposi??o de um material que alcan?a as funcionalidades pretendidas e obt?m ganho ambiental, podendo ser adotado em canteiros de obras, em contrapartida as argamassas industrializadas. / Although efficient from a technical point of view, mortar layers that make up the traditional masonry coating (slurry mortar, plaster and plaster) have to be in contradiction with the new construction technologies and more efficient methods of consumption and work rationalization. From an environmental point of view, the recovery of waste into new composites for the building has been a growing strand of studies in the scientific community, may prove to be a cost-effective solution in some cases. Thus, this research proposes the development of a mortar Decorative Coating Monolayer (RDM), for use in facades, produced on site, incorporating tempered glass waste (RVT) in the cement matrix, as a partial substitute for aggregate. Therefore, we adopted the binder respect / aggregate of 1: 6 (by volume), consistency index 250mm ? 20, sand substitution levels of glass waste 20%, 50% and 80% and relative water / cement varied in many traits. Two additives were used, a polymer, styrene-butadiene-based, and other chemical, besides mineral and silica fume inorganic pigment in colors red, yellow and blue. Mechanical tests were carried out on fresh pasta and hardened, as well as for the applied coating on masonry, so as to demonstrate the feasibility of the material. In addition, it verified the adequacy of the RDM built environment by means of thermal tests. The results demonstrated the feasibility of the proposed RDM with significantly higher values when compared to norms, especially the dash-added replacement content of 20% and addition of pigment in red. Therefore, the study shows the scientific community as an incentive to the use of technological innovations in construction, increasing the range of alternatives available for housing production, with the proposition of a material that achieves the desired functionality and obtain environmental gain, and may be adopted on construction sites as an alternative industrialized mortars.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-15T00:30:07Z No. of bitstreams: 1 JoseDanielJalesSilva_DISSERT.pdf: 2654477 bytes, checksum: 95ea07b4f227c6359f14ec087c4ad54c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-20T19:11:26Z (GMT) No. of bitstreams: 1 JoseDanielJalesSilva_DISSERT.pdf: 2654477 bytes, checksum: 95ea07b4f227c6359f14ec087c4ad54c (MD5) / Made available in DSpace on 2016-06-20T19:11:26Z (GMT). No. of bitstreams: 1 JoseDanielJalesSilva_DISSERT.pdf: 2654477 bytes, checksum: 95ea07b4f227c6359f14ec087c4ad54c (MD5) Previous issue date: 2015-11-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A gera??o de res?duos industriais tem aumentado cada vez mais nas ?ltimas d?cadas, motivando estudos sobre uma destina??o ambientalmente correta e sustent?vel e que tamb?m represente vantagens para seus geradores. Neste contexto est?o inseridas duas empresas do nicho de produtos de limpeza que est?o localizadas no munic?pio de S?o Jos? do Mipibu e produzem um lodo industrial em esta??o de tratamento de efluentes, constituindo a abordagem principal desta pesquisa. Diante disto, verificou-se o potencial de incorpora??o do referido lodo em matriz de cimento Portland como adi??o mineral para a fabrica??o de concretos, dado o elevado potencial de imobiliza??o de res?duos na matriz endurecida desse material, sendo estes utilizados posteriormente na pr?pria empresa para confec??o de artigos pr?-moldados. Foram adicionados diferentes teores de lodo (5, 10, 15 e 20%) em um tra?o comum (1:2:3), sendo avaliadas suas implica??es t?cnicas e microestruturais por meio de ensaios de trabalhabilidade no estado fresco e resist?ncia ? compress?o, porosidade total e microscopia eletr?nica de varredura (MEV) no estado endurecido. Os resultados obtidos demonstraram a viabilidade do processo tanto do ponto de vista t?cnico e ambiental quanto econ?mico. Todos os concretos produzidos com res?duo apresentaram uma aumento de trabalhabilidade atribu?do a natureza do res?duo que possu?a subst?ncias surfactantes capazes de adsorver min?sculas part?culas de ar na massa. Em contrapartida, para todos os teores foram obtidas resist?ncias ? compress?o inferiores ao concreto padr?o, com uma redu??o de 39%, para as amostras com 20% de lodo. Isso se deve, principalmente a um aumento de porosidade na zona de transi??o desses materiais, resultante de maior forma??o de etringita em detrimento a forma??o de CSH, principal composto cimentante, mas que, ainda assim, permite o uso desses concretos para a fabrica??o de artigos com car?ter n?o estrutural, como pisos pr?-moldados. Ademais, a absor??o de ?gua e ?ndice de vazios aumentaram levemente para todas as amostras, com exce??o do concreto com 20% de res?duo que apresentou redu??o para os dois par?metros. Diante deste contexto, o teor m?ximo recomendado ? de 20%, constituindo uma propor??o significativa e capaz de destinar sustentavelmente todo o res?duo gerado na ind?stria. / The generation of industrial wastes has been increased more and more in recent decades, motivating studies about a correct sustainable allocation and that also represents advantages for their generators. In this context, are included two companies of cleaning products niche, located in S?o Jos? do Mipibu/RN, that produces industrial sludge at a sewage treatment plant, and that is the main approach of this research. Given this, it was studied the incorporation potentiality of this sludge as a mineral addition in cement matrix for concrete production due it high capacity of wastes immobilization inside this material, which are subsequently used in the company for making precast articles. Were added different sludge concentrations (5, 10, 15 and 20%) in a common trait (1: 2: 3), and evaluated their techniques and microstructural implications via workability test in fresh state and compressive strength, full porosity and scanning electron microscopy (SEM) in the hardened state. The results demonstrated the feasibility of the process both from a technical and environmental view as economical. All concretes produced with residue showed an increase of workability given the nature of the waste that had surfactants substances capable of adsorbing tiny particles of air into the batter. However, for all concentrations were obtained lower compressive resistances than standard concrete, with a reduction of 39% for samples with 20% of sludge. This are attributed mainly to an increase of porosity in the transition zone of these material, resulting from increased formation of ettringite at the detriment to the formation of other compounds, but which still allows the use of these for the manufacture of concrete articles with non-structural nature, such as precast floor. In addition, the water absorption and void ratio increased slightly for all samples, except the concrete with 20% of waste that has a reduction for the last parameter. Given this context, the recommended maximum level is 20%, constituting a significant proportion and able to allocate sustainably all waste generated in the industry.

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.

Made available in DSpace on 2014-12-17T14:57:42Z (GMT). No. of bitstreams: 1 LANALS.pdf: 2805890 bytes, checksum: b890ad0b14de62da03f359b1314c879d (MD5) Previous issue date: 2007-11-20 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The world market of Kaolin has been growing as new investments for better quality of materials have been applied. This market produces amounts of dross that are put in the environment in a wrong way, causing damages to it. Trying to reduce these damages, researches have been done in an attempt to use kaolin dross in ceramic. The disposal of kaolin dross in the environment by the industries of the states of Rio Grande do Norte and Paraiba have great impact in society. Usually this dross is disposed clandestinely in places like roads, river banks and lands of small cities. The present work shows the characteristics of the kaolin produced by the mining company in Junco do Serid?, Paraiba state, western Serid?, 300 km from Natal, in the border of both states. After that, researches were done to study its physical and the chemistry characteristics, trying to see if it can be used in white ceramic. The samples got were bolted in fabric of 325# . The technological characteristics tried to use it as a product in white ceramic. For that, it was made a haracterization of the subject matter through enlargement analyses, ATG and ATD, elaborating three formulations that were burned in four different temperatures, 1175, 1200, 1250 and 1300 degrees centigrade up to 30 minutes. After the burning, the subjects were submitted to water absorbing tests, linear retreating, apparent porosity, apparent specific mass, resistance to flexibility and MEV. For one of the mixtures it was obtained demanded properties for a semi porous material / O mercado mundial de caulim tem se mostrado cada vez mais competitivo, considerando-se o investimento crescente no desenvolvimento de novos produtos com maior qualidade. Esse mercado gera uma quantidade de res?duo que s?o dispostos no meio ambiente de maneira inadequada, causando grandes impactos ambientais. Na busca de minimizar esses impactos, estudos est?o sendo elaborados para aproveitamento do res?duo de caulim em massas cer?micas. Os descartes de res?duos gerados pelas ind?strias de beneficiamento de caulim nos estados do Rio Grande do Norte e da Para?ba incidem negativamente sobre toda a sociedade. Na maioria das vezes esses res?duos s?o dispostos clandestinamente em locais como terrenos baldios, margens de rios, ruas e periferias das cidades. O presente trabalho tem por objetivo caracterizar o rejeito de caulim proveniente de empresa de minera??o localizada em Junco do Serid? - PB, no Serid? Oriental, a 300 km de Natal, divisa entre os Estados do Rio Grande do Norte e Para?ba e, em seguida, estudar as suas propriedades f?sicas e qu?micas verificando se os resultados obtidos fazem com que o mesmo possa vir a ser usado em composi??o de partida para obten??o de cer?mica branca. As amostras coletadas foram submetidas ? peneiramento em malha de 325 mesh. A caracteriza??o tecnol?gica foi realizada visando a sua aplica??o do res?duo como produto para cer?mica branca. Para isso, foi feita a caracteriza??o das mat?rias-primas por an?lise dilatom?trica, ATG e ATD, elaborando-se tr?s formula??es que foram sinterizadas em quatro temperaturas: 1175, 1200, 1250 e 1300 ?C com patamar de 30 minutos. Ap?s a sinteriza??o, os corpos-de-prova foram submetidos a ensaios de absor??o de ?gua, retra??o linear, porosidade aparente, massa espec?fica aparente, resist?ncia ? flex?o e MEV. Obtiveram-se para uma das misturas, propriedades compat?veis com as exigidas para um material semi- poroso segundo a norma NBR 13

Made available in DSpace on 2014-12-17T14:57:48Z (GMT). No. of bitstreams: 1 MaurilioML.pdf: 1402196 bytes, checksum: 5d957dc60dc4fcde085c9265b4ecfe9b (MD5) Previous issue date: 2008-10-15 / The red ceramics and structural ceramics, as they are known, include ceramic materials made by blocks of seals and structures, bricks, tiles, smail flagstones manacles, rustic floors and ornamental materials. Their fabrication uses raw material such as clay and clay sites, with some content of impurity. It has good durability and mechanical strength to compression, low cost, making it one of the mainly used materials in civil engineering. The incorporation of many industrial activities residue to ceramic products is a technological alternative for reducing the environmental impact caused by its carefree disposal. This incorporation can promote chemical change and inertness of metals from residue, by fixation in the glassy phase of ceramic during the burning stage. The main aim of this project is to study the technical feasibility of the addition of ceramic oven ash into formulations of mass for structural ceramics. In this project two kinds of clay (plastic and non-plastic) were used, as well as the ash from firewood used in the process of burning of structural ceramics. A group of experiments was outlined, which permitted the evaluation of the influence of the burning cycle in different temperatures of the ash content in formulations for ceramic blocks through technological properties, mechanical behavior and microstructure. Five samples were processed of each one of the masses of plastic and non-plastic clay without addition of ash and with addition of ash on the percentages of 10 % and 20 %, for temperatures of 850 ?C, 950 ?C, 1050 ?C and 1150 ?C, obtained through sinterization process. Among the studied compositions, the one which presented best performance was the mass of clay with 10 % of ash, at temperature of 1150 ?C, with the smallest absorption of water, the smallest apparent porosity, specific apparent mass a bit over the others and greatest mechanical resistance to flexion. The composition made confirmed the technical feasibility of the use of ash in the mass for structural ceramics with maintenance of its necessary characteristics for its purposes / A cer?mica vermelha ou estrutural, como ? conhecida, compreende os materiais cer?micos formados por blocos de veda??es e estruturais, tijolos, telhas, lajotas, manilhas, pisos r?sticos e materiais ornamentais. Sua fabrica??o utiliza mat?rias-primas como argilas e siltes argilosos, com certo teor de impurezas. Possui boa durabilidade e resist?ncia mec?nica ? compress?o, baixo custo, o que a torna um dos principais materiais utilizados na constru??o civil. A incorpora??o de res?duos de diversas atividades industriais em produtos de cer?mica estrutural ? uma alternativa tecnol?gica para reduzir o impacto ambiental causado por sua disposi??o indiscriminada. Esta incorpora??o pode promover a troca qu?mica e a inertiza??o de metais, provenientes do res?duo, por fixa??o na fase v?trea da cer?mica durante o est?gio de queima. O trabalho em quest?o tem como objetivo principal estudar a viabilidade t?cnica de adi??o de cinza de alto forno cer?mico em formula??es de massa para cer?mica estrutural. Neste trabalho foram utilizadas duas argilas (pl?stica e n?o-pl?stica), assim como a cinza provinda da lenha utilizada no processo de queima de cer?mica estrutural. Delineou-se um conjunto de experimentos que permitiram avaliar a influ?ncia do ciclo de temperatura de queima em temperaturas diferentes do teor de cinzas em formula??es para blocos cer?micos atrav?s das propriedades tecnol?gicas, comportamento mec?nico e microestrutura. Foram processadas cinco amostras de cada uma das massas de argila pl?stica e n?o pl?stica sem adi??o de cinza e com adi??o de cinza nos percentuais de 10 % e 20 %, para temperaturas de 850 0C, 950 0C, 1050 0C e 1150 0C, tendo sido obtidas atrav?s do processo de sinteriza??o. Das composi??es estudadas com cinza, a que apresentou melhor desempenho foi a massa de argilas com 10 % de cinza, na temperatura de 1150 ?C, com a menor absor??o de ?gua, menor porosidade aparente, massa espec?fica aparente pouco acima das outras e maior resist?ncia mec?nica ? flex?o. A composi??o efetuada comprovou a viabilidade t?cnica da utiliza??o de cinza na massa para cer?mica estrutural, com manuten??o das suas caracter?sticas necess?rias para os fins a que se destinam

Made available in DSpace on 2014-12-17T15:03:18Z (GMT). No. of bitstreams: 1 CibeleGC.pdf: 1402838 bytes, checksum: db637069ba867fa96c00ae8cf6ff383c (MD5) Previous issue date: 2006-11-10 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The municipal district of Equador-RN is located in an area of great amounts of ores, being your main economical activity the extraction and the kaolin improvement. The main originating from environmental problem that activity is the amount of generated residue, about 70% of the extracted kaolin. The residues are simply piled up in lands of the improvement companies, occupying like this a large area and causing impact in the existent flora. When dry, the residues transform powdered and for the action of the wind, they disperse, polluting the air. Being like this, the present work has as objective evaluates the incorporation of the great residue, originating from of the kaolin improvement, in partial substitution of all the employed aggregates in a conventional mixture of asphalt concrete, which was used in the paving of BR101/RN061 - passage between Ponta Negra and Ares. That evaluation was accomplished in three stages. The first refers to the evaluation of the physical, thermal and mineralogical characteristics of the residue with the intention of to classify it and to define your application as aggregate (small and great). The second refers to the physical characterization of the aggregates and of the asphalt material used in the conventional mixture. And the third, to the evaluation of the mixtures containing residue, which were elaborated starting from the conventional mixture with the gradual incorporation of the residue, from 5 to 40%, in substitution to the part of the conventional aggregates, in way to obtain similar particle size curves the one of the conventional mixture. That evaluation was accomplished through the comparison between the volumetric composition, the mechanical behavior and the susceptibility to the humidity of the mixtures containing residue with the one of the conventional mixture, and with the one of the DNIT specifications. The results show that the great residue originating from of the kaolin improvement has grains of the most varied size, being like this, it can substitute part of all the conventional aggregates and of the filler in an asphalt mixture. Besides, your mineralogical composition presented the same present minerals in the composition of conventional aggregates used in paving. The results evaluation of the volumetric composition of the mixtures containing residue indicates that it can use up to 30% of residue in substitution to the conventional aggregates. The evaluation of the mechanical behavior of those mixtures indicates that the residue increment in the studied mixtures caused an increase of the stability and a reduction of the resistance to the traction. The values obtained in the resistance to the traction meet below the minimum value specified by DNIT, but close to the value obtained in the conventional mixture. When taking in consideration the susceptibility of the same ones to the humidity, the results indicate that she can use up to 25% of residue / O munic?pio de Equador-RN est? localizado numa regi?o de grandes quantidades de min?rios, sendo sua principal atividade econ?mica a extra??o e o beneficiamento de caulim. O principal problema ambiental proveniente dessa atividade ? a quantidade de res?duo gerado, cerca de 70% do caulim extra?do. Os res?duos s?o simplesmente amontoados em terrenos das empresas de beneficiamento, ocupando assim uma grande ?rea e causando impacto na flora existente. Quando secos, os res?duos transformam-se em p? e pela a??o do vento, se espalham, poluindo o ar. Sendo assim, o presente trabalho tem como objetivo avaliar a incorpora??o do res?duo grosso, oriundo do beneficiamento de caulim, em substitui??o parcial de todos os agregados empregados em uma mistura convencional de concreto asf?ltico, a qual foi utilizada na pavimenta??o da BR101/RN061 trecho entre Ponta Negra e Ares. Essa avalia??o foi realizada em tr?s etapas. A primeira refere-se ? avalia??o das caracter?sticas f?sicas, t?rmicas e mineral?gicas do res?duo com o intuito de classific?-lo e definir sua aplica??o como agregado (mi?do e gra?do). A segunda refere-se ? caracteriza??o f?sica dos agregados e do material asf?ltico utilizados na mistura convencional. E a terceira ? avalia??o das misturas contendo res?duo, as quais foram elaboradas a partir da mistura convencional com a incorpora??o gradativa do res?duo, de 5 a 40%, em substitui??o ? parte dos agregados convencionais, de forma a obter curvas granulom?tricas similares a da mistura convencional. Essa avalia??o foi realizada atrav?s da compara??o entre a composi??o volum?trica, o comportamento mec?nico e a suscetibilidade ? umidade das misturas contendo res?duo com os da mistura convencional, e com os das especifica??es exigidas pelo DNIT. Os resultados mostram que o res?duo grosso oriundo do beneficiamento de caulim possui gr?os dos mais variados di?metros, sendo assim, pode substituir parte de todos os agregados convencionais e do filler em uma mistura asf?ltica. Al?m disso, a sua composi??o mineral?gica apresentou os mesmos minerais presentes na composi??o de agregados convencionais utilizados em pavimenta??o. Os resultados da avalia??o da composi??o volum?trica das misturas contendo res?duo indicam que se pode empregar at? 30% de res?duo em substitui??o aos agregados convencionais. A avalia??o do comportamento mec?nico dessas misturas indicam que o incremento de res?duo nas misturas estudadas ocasionou um aumento da estabilidade e uma redu??o da resist?ncia ? tra??o. Os valores obtidos na resist?ncia ? tra??o se encontram abaixo do valor m?nimo especificado pelo DNIT, mas pr?ximos ao valor obtido na mistura convencional. Ao levar em considera??o a suscetibilidade das mesmas ? umidade, os resultados indicam que se pode empregar at? 25% de res?duo

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-20T21:21:26Z No. of bitstreams: 1 ManuelaSilvaMartinsDeOliveira_DISSERT.pdf: 4629063 bytes, checksum: 9e9e1aef7dcd4aa2529d87a665e32ac6 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-23T20:56:18Z (GMT) No. of bitstreams: 1 ManuelaSilvaMartinsDeOliveira_DISSERT.pdf: 4629063 bytes, checksum: 9e9e1aef7dcd4aa2529d87a665e32ac6 (MD5) / Made available in DSpace on 2017-02-23T20:56:18Z (GMT). No. of bitstreams: 1 ManuelaSilvaMartinsDeOliveira_DISSERT.pdf: 4629063 bytes, checksum: 9e9e1aef7dcd4aa2529d87a665e32ac6 (MD5) Previous issue date: 2016-08-05 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / O l?tio ? um dos elementos que apresentam um elevado interesse comercial, justamente devido as suas caracter?sticas que possibilitam a utiliza??o em baterias de ?on l?tio, medicamentos, ligas, dentre outras aplica??es. Sua diversificada aplicabilidade aliada ?s dificuldades de obten??o faz com que esse material tenha um alto valor comercial. Um dos principais minerais de onde pode-se extrair l?tio ? o Espodum?nio. Industrialmente, o principal processo de obten??o do l?tio do espodum?nio ? a extra??o via ?cido sulf?rico. Tal processo gera como subproduto uma grande quantidade de res?duo s?lico-aluminoso que n?o possui destino final, sendo em sua maioria armazenados em aterros ou deixados ao ar livre. Foram estudados neste trabalho, diferentes procedimentos de s?ntese buscando diferentes estruturas zeol?ticas como uma maneira de agregar valor a este res?duo industrial. Seguiu-se como base a receita tradicional de cada estrutura fornecida pela ?International Zeolite Association? (IZA) modificando-a com a adi??o do res?duo s?lico-aluminoso. Os materiais sintetizados foram caracterizados atrav?s de difra??o de raios-X e microscopia eletr?nica de varredura (MEV). Foi poss?vel sintetizar ze?litas MER, EDI e MOR com alta cristalinidade e fase ?nica, sendo a primeira vez em que estas estruturas s?o obtidas atrav?s do res?duo s?lico-aluminoso proveniente da extra??o do l?tio do mineral espodum?nio. Outros materiais, tais como ze?lita LTA, foram obtidos, mas com pouca cristalinidade ou com mais de uma fase presente. Estudos complementares de otimiza??o desta s?ntese se fazem necess?rios. / Lithium is one of the elements that have a high commercial interest, precisely because of its features that allow use in lithium ion batteries, medicines, alloys, among other applications. Its diverse applicability allied to obtain difficulties makes this material has a high commercial value. One of the major minerals which can extract lithium is spodumene. Industrially, the main process of obtaining the spodumene lithium is extracted via sulfuric acid. This process generates as a byproduct a lot of silico-aluminous waste that has no final destination, being mostly stored in landfills or left outdoors. They were studied in this work, different synthetic procedures seeking different zeolite structures as a way to add value to this industrial waste. This was followed based on the traditional recipe of each structure provided by the "International Zeolite Association" (IZA) modifying it with the addition of silica-alumina residue. The synthesized materials were characterized by X-ray diffraction and scanning electron microscopy (SEM). It was possible to synthesize zeolites MER, EDI and MOR with high crystallinity and single phase, the first being that these structures are obtained by silico-aluminous waste from the extraction of the mineral spodumene lithium. Other materials, such as LTA zeolite, were obtained, but with low crystallinity or with more than one phase present. Further optimization studies are needed.