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Abstract(s)
Na presente dissertação, com o objetivo de caracterizar o comportamento dos
rejeitados mineiros, foram realizados diversos ensaios laboratoriais sob amostras
remoldadas. Durante os ensaios de caracterização, foram comparadas diferentes técnicas
para determinação da densidade das partículas sólidas, tentando perceber as respetivas
vantagens e a sua aplicabilidade aos rejeitados. Para além da caracterização, realizou-se
um estudo sobre a reconstituição de provetes de rejeitados através de várias técnicas
desenvolvidas por outros autores, sujeitos posteriormente a ensaios triaxiais. Ademais,
foi desenvolvida uma nova técnica com o objetivo de criar um provete capaz de
reproduzir as características dos rejeitados nos locais de deposição. Por fim, foi
analisada a forma como se poderá determinar a permeabilidade dos rejeitados durante a
realização de ensaios triaxiais.
ABSTRACT: In this dissertation, several laboratory tests using remoulded samples were executed, with the purpose of characterizing the tailings behaviour. Two different procedures for determining the density of solid particles techniques were compared, trying to understand their advantages and applicability to the tailings. Besides the characterization, this work includes a study about the existing techniques for reconstitution of samples for triaxial testing. Furthermore, a new technique was developed, with the purpose of creating samples capable of reproducing the tailings characteristics in the deposition sites. Additionally, the possibilities of determining the tailings permeability during the execution of triaxial tests were analysed.
ABSTRACT: In this dissertation, several laboratory tests using remoulded samples were executed, with the purpose of characterizing the tailings behaviour. Two different procedures for determining the density of solid particles techniques were compared, trying to understand their advantages and applicability to the tailings. Besides the characterization, this work includes a study about the existing techniques for reconstitution of samples for triaxial testing. Furthermore, a new technique was developed, with the purpose of creating samples capable of reproducing the tailings characteristics in the deposition sites. Additionally, the possibilities of determining the tailings permeability during the execution of triaxial tests were analysed.
Description
Keywords
Rejeitados Densidade das partículas sólidas Permeabilidade Reconstituição de amostras Ensaio Triaxial