No description available.

Thesis (M.S.)--Ohio University, August, 1997. / Title from PDF t.p.

Thesis (M.S.)--Cleveland State University, 2006. / Includes bibliographical references (p. 102-106).

Thesis (Ph. D.)--Drexel University, 2006. / Includes abstract and vita. Includes bibliographical references (leaves 221-234).

Compacted shales cause problems because they tend to degrade with time due to weathering. Degradation results in the shale deteriorating from a hard rock-like material to a soft fine-grained soil mass with lower shear strength and high deformability. Consequently, common problems that occur in embankments constructed with compacted shales include settlement and instabilities. Therefore, accelerating weathering prior to compaction by wetting and breaking down the shales before placement can reduce the deterioration during the service life of the construction. Extensive laboratory testing was performed in order to characterize the mechanical behavior of compacted shales. Critical State theory is a clever framework that describes the mechanical behavior of soils with a simple system of equations that explains all the aspects of compression and shear of soils. NorSand is a model constructed in the framework of the Critical State theory that decouples the yield loci from the normally consolidated line. This characteristic made this model suitable for compacted shales. Also, empirical evidence showed that the plastic behavior of compacted shales is controlled by a Nova type flow rule that is a function of the mineralogical characteristics of the shales. This finding has implications in the shape of the yield loci and the hardening rule.

Analisam-se a variação de parâmetros obtidos da curva tensão-deformação dos solos, interpretada como uma hipérbole, em função dos parâmetros de compactação obtidos da curva de compactação Proctor Normal. Esta análise é feita em três solos típicos. / The variation of the parameters obtained by the stress-strain curve of the soils, understood as a hyperbola is analysed in function of the compactation parameters obtained from the Proctor Compactation Curve. This analysis is made with three typical soils.

Made available in DSpace on 2017-07-10T19:24:40Z (GMT). No. of bitstreams: 1 Janete Terezinha Chimbida.pdf: 933108 bytes, checksum: 8674521518101715064fb24da02f65dd (MD5) Previous issue date: 2006-05-29 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / To present research it was developed in the Universidade Estadual do Oeste do Paraná -UNIOESTE, using the Laboratório de Geotecnia for assembly of the experiment and the Laboratório de Saneamento for chemical analyses. The coming of the processes liquid and solid residues and activities agro industries have as characteristic common to high nutrients load, above all Nitrogen and Phosphorous. When these materials are disposed in a of wastes contention system without correct impermeabilization it can happen the contamination of the groundwater. The objective of this work is to verify the quality of typical distroferric Red Oxisol, of wide regional occurrence, compacted in what it says respect to the permeability; the lixiviation potential of the phosphate; accumulation of the phosphate in the soil and the alterations happened in the soil matrix after the percolation of the swine effluent. The experiment was driven in laboratory scale, being set up a total of 27 columns of PVC tubes, of 1,15m of length and 0,10m of diameter, being in the compacted base 0,03m of soil in three moisture contents (28, 32 and 36%) and applied gross swine effluent (E1), diluted swine effluent (E2) and distilled water (E3), making three repetitions, percolating for at the most 15 days or 8 times the total volume of pores (VP), picking up samples of 25 mL, evaluating the pH, CE and phosphate. Then the columns were dismounted, removing the hydraulic load and dividing the soil in three increments: 0 to -1 cm, -1 at -2 cm and -2 to -3 cm. Discarded the middle increment. It was conduced the analysis of the content organic matter (MO), total and uptake of phosphorous, it was also determined the pH, the zero point charge (ZPC) and the surface potential. The results showed reduction in the permeability with the application of swine effluent to at levels that indicate a possible colmatation; the measures of electric conductivity (CE) were smaller than the initials in the effluents, and the retention of particles was shown with an decrease in the soil surface potential; as the percolation of the phosphate, it was minimum and it happened in the treatments with the soil was not appropriately compacted. The soil analysis showed that the phosphate was retained in the superior increment. / A presente pesquisa foi desenvolvida na Universidade Estadual do Oeste do Paraná UNIOESTE Campus de Cascavel, utilizando o Laboratório de Geotecnia para a montagem do experimento e o Laboratório de Saneamento para a realização das análises químicas. Os resíduos líquidos e sólidos provenientes dos processos e atividades agroindustriais têm como característica comum a alta carga de nutrientes, sobretudo Nitrogênio e Fósforo. Quando esses materiais são dispostos em um sistema de contenção de rejeitos, sem a correta impermeabilização, pode ocorrer a contaminação das águas subterrâneas. O objetivo deste trabalho foi verificar a qualidade do Latossolo Vermelho distroférrico típico, de larga ocorrência regional, compactado, em relação à permeabilidade; ao potencial de lixiviação do fosfato; à acumulação do fosfato no solo e às alterações ocorridas na matriz do solo, após a percolação do efluente de suíno. O experimento foi conduzido em escala de laboratório, montando-se um total de 27 colunas de tubos de PVC, de 1,15 m de comprimento e 0,10 m de diâmetro, compactado na base 0,03 m de solo em três teores de umidade (28, 32 e 36%) e aplicado efluente de suíno bruto (E1), efluente de suíno diluído (E2) e água destilada (E3), com três repetições. Deixou-se percolar por no máximo 15 dias ou 8 vezes o volume total de poros (VP), recolhendo-se amostras de 25 mL, para avaliação do pH, da condutividade elétrica (CE) e da concentração de fosfato. Em seguida, as colunas foram desmontadas, removendo-se a carga hidráulica e dividindo-se o solo em três incrementos: 0 a 1 cm, -1 a 2 cm e 2 a 3 cm. Nos incrementos superior e inferior, realizou-se a análise do teor de matéria orgânica (MO), fósforo total e fósforo assimilável e determinou-se o pH, o ponto de carga zero (PCZ) e o potencial elétrico de superfície, sendo que o incremento do meio foi descartado. Os resultados mostraram redução na permeabilidade com a aplicação de efluente de suíno a níveis que indicam uma possível colmatação; as medidas de condutividade elétrica (CE) foram menores que as iniciais nos efluentes. Verificou-se a retenção de partículas com um decréscimo no potencial de superfície no solo; quanto à percolação do fosfato, foi mínima e ocorreu nos tratamentos em que o solo não foi compactado adequadamente. A análise de solo mostrou que o fosfato ficou retido no incremento superior.

Analisam-se a variação de parâmetros obtidos da curva tensão-deformação dos solos, interpretada como uma hipérbole, em função dos parâmetros de compactação obtidos da curva de compactação Proctor Normal. Esta análise é feita em três solos típicos. / The variation of the parameters obtained by the stress-strain curve of the soils, understood as a hyperbola is analysed in function of the compactation parameters obtained from the Proctor Compactation Curve. This analysis is made with three typical soils.

Made available in DSpace on 2017-05-12T14:48:03Z (GMT). No. of bitstreams: 1 Janete Terezinha Chimbida.pdf: 933108 bytes, checksum: 8674521518101715064fb24da02f65dd (MD5) Previous issue date: 2006-05-29 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / To present research it was developed in the Universidade Estadual do Oeste do Paraná -UNIOESTE, using the Laboratório de Geotecnia for assembly of the experiment and the Laboratório de Saneamento for chemical analyses. The coming of the processes liquid and solid residues and activities agro industries have as characteristic common to high nutrients load, above all Nitrogen and Phosphorous. When these materials are disposed in a of wastes contention system without correct impermeabilization it can happen the contamination of the groundwater. The objective of this work is to verify the quality of typical distroferric Red Oxisol, of wide regional occurrence, compacted in what it says respect to the permeability; the lixiviation potential of the phosphate; accumulation of the phosphate in the soil and the alterations happened in the soil matrix after the percolation of the swine effluent. The experiment was driven in laboratory scale, being set up a total of 27 columns of PVC tubes, of 1,15m of length and 0,10m of diameter, being in the compacted base 0,03m of soil in three moisture contents (28, 32 and 36%) and applied gross swine effluent (E1), diluted swine effluent (E2) and distilled water (E3), making three repetitions, percolating for at the most 15 days or 8 times the total volume of pores (VP), picking up samples of 25 mL, evaluating the pH, CE and phosphate. Then the columns were dismounted, removing the hydraulic load and dividing the soil in three increments: 0 to -1 cm, -1 at -2 cm and -2 to -3 cm. Discarded the middle increment. It was conduced the analysis of the content organic matter (MO), total and uptake of phosphorous, it was also determined the pH, the zero point charge (ZPC) and the surface potential. The results showed reduction in the permeability with the application of swine effluent to at levels that indicate a possible colmatation; the measures of electric conductivity (CE) were smaller than the initials in the effluents, and the retention of particles was shown with an decrease in the soil surface potential; as the percolation of the phosphate, it was minimum and it happened in the treatments with the soil was not appropriately compacted. The soil analysis showed that the phosphate was retained in the superior increment. / A presente pesquisa foi desenvolvida na Universidade Estadual do Oeste do Paraná UNIOESTE Campus de Cascavel, utilizando o Laboratório de Geotecnia para a montagem do experimento e o Laboratório de Saneamento para a realização das análises químicas. Os resíduos líquidos e sólidos provenientes dos processos e atividades agroindustriais têm como característica comum a alta carga de nutrientes, sobretudo Nitrogênio e Fósforo. Quando esses materiais são dispostos em um sistema de contenção de rejeitos, sem a correta impermeabilização, pode ocorrer a contaminação das águas subterrâneas. O objetivo deste trabalho foi verificar a qualidade do Latossolo Vermelho distroférrico típico, de larga ocorrência regional, compactado, em relação à permeabilidade; ao potencial de lixiviação do fosfato; à acumulação do fosfato no solo e às alterações ocorridas na matriz do solo, após a percolação do efluente de suíno. O experimento foi conduzido em escala de laboratório, montando-se um total de 27 colunas de tubos de PVC, de 1,15 m de comprimento e 0,10 m de diâmetro, compactado na base 0,03 m de solo em três teores de umidade (28, 32 e 36%) e aplicado efluente de suíno bruto (E1), efluente de suíno diluído (E2) e água destilada (E3), com três repetições. Deixou-se percolar por no máximo 15 dias ou 8 vezes o volume total de poros (VP), recolhendo-se amostras de 25 mL, para avaliação do pH, da condutividade elétrica (CE) e da concentração de fosfato. Em seguida, as colunas foram desmontadas, removendo-se a carga hidráulica e dividindo-se o solo em três incrementos: 0 a 1 cm, -1 a 2 cm e 2 a 3 cm. Nos incrementos superior e inferior, realizou-se a análise do teor de matéria orgânica (MO), fósforo total e fósforo assimilável e determinou-se o pH, o ponto de carga zero (PCZ) e o potencial elétrico de superfície, sendo que o incremento do meio foi descartado. Os resultados mostraram redução na permeabilidade com a aplicação de efluente de suíno a níveis que indicam uma possível colmatação; as medidas de condutividade elétrica (CE) foram menores que as iniciais nos efluentes. Verificou-se a retenção de partículas com um decréscimo no potencial de superfície no solo; quanto à percolação do fosfato, foi mínima e ocorreu nos tratamentos em que o solo não foi compactado adequadamente. A análise de solo mostrou que o fosfato ficou retido no incremento superior.

Roller Compacted Concrete (RCC) has rapidly evolved from a concept to a material and a process which is used throughout the world for faster and more economical construction of dams. Currently, there are more than 250 RCC dams, completed or under construction, in the world. On the other hand, currently, there are only two RCC dams completed (Su&ccedil / ati and Cindere Dams) and two under construction (Beydag and &Ccedil / ine Dam) in Turkey. RCC dams are constructed in a series of compacted layers usually 30 cm in thickness. Therefore, appropriate bonding of successive layers is important and as a result, in between successive layers a bedding mix is often used to fill the surface voids in both the compacted layer below and the covering layer above, as well as to bond the two successive layers together. This study presents an experimental investigation on the bonding efficiency of RCC with different bedding mixes. The Beydag Dam RCC mixture was taken as the model for the preparation of laboratory-made RCC specimens. In the experimental study, 15 cm cubic specimens were prepared in two layers. Each layer was compacted using an electro pneumatic demolition hammer for 30 seconds. Four different time intervals between placement and compaction of two successive layers and two different bedding mix types were the selected cases for investigation. While preparing the specimens, the second layer was placed and compacted 0, 4, 8, 12 and 16 hours after the first layer was compacted. In between the two layers, two types of bedding mixes are placed in between previously compacted and freshly placed layer for joint treatment. One of the bedding mixes, having 200 kg/m3 cement content is termed poor while other one is termed rich having 400 kg/m3 cement content. RCC specimens are then subjected to compressive strength, splitting tensile strength and permeability tests. As a result of the experimental program, it was found that / a rich bedding mix was a more effective bonding agent between compacted RCC layers than the poor bedding mix for all time intervals between layers. Furthermore, it was concluded that bonding efficiency of RCC is not too dependent on time interval between layer compactions up to 16 hours. Finally, splitting tensile strength and sorptivity tests are shown to be applicable test methods for determination of bonding efficiency of RCC specimens if there is a definite bedding layer in between freshly placed and formerly compacted RCC.