Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-01-05T16:51:31Z No. of bitstreams: 1 AndreLuizLopesToledo_DISSERT.pdf: 3174228 bytes, checksum: f818f27305b477f7bd49409718209f31 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-01-07T21:53:38Z (GMT) No. of bitstreams: 1 AndreLuizLopesToledo_DISSERT.pdf: 3174228 bytes, checksum: f818f27305b477f7bd49409718209f31 (MD5) / Made available in DSpace on 2016-01-07T21:53:38Z (GMT). No. of bitstreams: 1 AndreLuizLopesToledo_DISSERT.pdf: 3174228 bytes, checksum: f818f27305b477f7bd49409718209f31 (MD5) Previous issue date: 2014-11-17 / A perfura??o de po?os para extra??o de petr?leo gera, entre outros res?duos, fragmentos de rochas e solos. Estes fragmentos s?o denominados cascalho de perfura??o de petr?leo ou simplesmente res?duo de perfura??o de petr?leo. Nos locais de explora??o onshore s?o formados grandes dep?sitos de cascalho de perfura??o, material de onerosa destina??o final. Sendo assim, este trabalho apresenta uma pesquisa com o objetivo de avaliar o emprego de res?duo de perfura??o misturado a um solo later?tico, como material comp?sito a ser utilizado na execu??o de aterros compactados em obras de terra. Solo e res?duo foram avaliados atrav?s de difra??o de raios X (DRX), fluoresc?ncia de raios X (FRX) e mediante ensaios de laborat?rio tradicionalmente empregados na mec?nica dos solos, como, an?lise granulom?trica, determina??o de limite de liquidez e de plasticidade e ensaios de compacta??o. Ap?s a caracteriza??o de solo e res?duo individualmente foram estudadas misturas de solo e res?duo, segundo as dosagens de 2,5%, 5%, 10%, e 15% de res?duo em rela??o ? massa de solo seco. Essas misturas foram submetidas aos ensaios de compacta??o, CBR, cisalhamento direto e adensamento. Os resultados dos ensaios foram comparados com as normas vigentes do DNIT para execu??o de aterros compactados. Os resultados encontrados nos ensaios das misturas atendem aos par?metros m?nimos necess?rios, permitindo, sob o ponto de vista da an?lise geot?cnica, a utiliza??o dessas misturas para execu??o de aterros compactados / The drilling of wells for petroleum extraction generates rocks and soils fragments, among other residues. These fragments are denominated petroleum drilling gravel or simply petroleum drilling residue. On the sites of onshore exploration are formed big deposits of drilling gravel, an expensive final destination material. This work aims at evaluating the addition of drilling residue to a lateritic soil, as composite material, for construction of compacted fills for earth work projects. Soil and residue were evaluated by X-ray diffraction (XRD) and X-ray fluorescence (XRF) and by laboratory tests traditionally used in soil mechanics, as particle-size analysis of soils, determination of liquid and plasticity indexes and compaction test. After soil and residue characterization, soil-residue mixtures were studied, using dosages of 2,5%, 5%, 10%, and 15% of residue in relation to the dry soil mass. These mixtures were submitted to compaction test, CBR, direct shear test and consolidation test. The test results were compared to the current legislation of DNIT for compacted fill construction. The results showed that the mixtures presented the minimal necessary parameters, allowing, from the point of view of geotechnical analysis, the use of these mixtures for construction of compacted fills

Made available in DSpace on 2014-12-17T15:03:29Z (GMT). No. of bitstreams: 1 KarisiaLBF_DISSERT.pdf: 5553904 bytes, checksum: bd332662da6ffbc4e0c2609d1d3928c7 (MD5) Previous issue date: 2012-01-27 / A technological alternative for the correct disposal of tires is the use in the construction of embankment with soil and shredded tires. The use of waste tires in tropical soils requires prior knowledge of the properties and limitations of these materials. In this work, the results of an experimental program was devised to characterize the behavior of mixtures of waste tires and a lateritic soil. The residue used in this study is classified as tire buffings with an average size of 1.4 mm. The laboratory program included testing of particle size analysis, Atterberg limits, compaction, direct shear tests, permeability and confined compression tests with pure soil, pure tire and the mixtures. Proportions of 0% (pure soil), 10%, 20%, 40%, 50 % and 100% (pure tire) by weight were used. For the confining stress levels used in the study, the presence of tire residue provided a considerable increase in shear strength of the mixture. The maximum shear strength was obtained for a residue content of 40% by weight. Permeability tests on samples of waste under a confining stress of 100 kPa showed that the permeability increases significantly with increasing residue content until a residue content of 20%. The increase in permeability after that value showed to be negligible. Confined compression tests showed that the soil mixed with tire residue becomes more compressible than the pure soil. The secant constrained modulus (Msec) for the same vertical stress decreases with increasing percentage of residue. / Dentre as alternativas tecnol?gicas para a destina??o correta de pneus est? o uso na constru??o de aterros de misturas de solo e res?duo de pneus triturados. A utiliza??o de res?duo de pneus em solos tropicais requer o conhecimento pr?vio das propriedades e limita??es desses materiais. Nesta disserta??o, apresentam-se os resultados de um programa experimental para caracteriza??o de misturas de res?duo de pneus em um solo later?tico. O res?duo utilizado neste estudo ? classificado como desbastes de pneus, com tamanho m?dio de 1,4 mm. O programa laboratorial incluiu ensaios de an?lise granulom?trica, limites de consist?ncia, compacta??o, cisalhamento direto, permeabilidade e compress?o confinada com as misturas de solo res?duos de pneus. Foram utilizadas propor??es de 0% (solo puro), 10%, 20%, 40%, 50% e 100% (res?duo puro) em peso. Para os n?veis de tens?o confinantes utilizados no estudo, a presen?a do res?duo de pneu proporcionou um aumento consider?vel da resist?ncia ao cisalhamento da mistura. A m?xima resist?ncia ao cisalhamento foi obtida para um teor de res?duo de 40% em peso. Os ensaios de permeabilidade em amostras de res?duos sob uma tens?o confinante de 100 kPa revelaram que a permeabilidade cresce significativamente com o aumento do teor de res?duo at? um teor de 20%, estabilizando-se em seguida. Os ensaios de compress?o confinada evidenciaram que o solo misturado ao res?duo de pneus torna-se mais compress?vel que o solo puro. O estudo demonstra que o m?dulo de compress?o confinada secante (Msec) para uma mesma tens?o vertical diminui com o aumento da porcentagem de res?duo.