RESUMO ARAB, P. B. Transporte de Cu 2+ em liners compostos de solo argiloso compactado (CCL) e geocomposto bentonítico (GCL), 2011. 117p. Dissertação (Mestrado em Geotecnia), Escola
Abstract. This paper presents investigations on the behavior of four types of rocks (syenite, granite, marble and sandstone) subjected to abrasive waterjet cutting. The influence of traverse velocity and pump pressure on the efficiency of cutting is analyzed. Moreover, the influence of the physical-mechanical behavior of the rocks on their removal process is investigated. It was found that, in general, the removed volume of rock and the cutting rate tend to increase with the decrease of traverse velocity and with the increase of pump pressure. Moreover, the opposite trend was observed in the analysis of the specific energy of cutting. Optimum conditions of cutting efficiency were found when cutting the studied rocks with a traverse velocity of 200 mm/min and a pump pressure of 400 MPa. Finally, the marble and the sandstone presented the lowest resistance to abrasive waterjet cutting while the syenite and granite presented the highest resistances.
Revista Brasileira de GeociênciasResumo Rochas metamáfi cas, ortoderivadas, caracterizadas por assinaturas do tipo MORB e idades paleoproterozoicas ocorrem na região de Cajamar, centro leste do Estado de São Paulo, associadas a fi litos, metarenitos e metacalcários da sequência metavulcano-sedimentar do Grupo São Roque, Faixa Ribeira Meridional. Para essas rochas, a associação de pico metamórfi co é representada por actinolita-albita-epidotoclorita, típica de metamorfi smo regional da fácies dos xistos verdes. Para melhor caracterizar os parâmetros de pressão e temperatura a que foram submetidas essas rochas, os principais minerais foram analisados por microssonda eletrônica. O metamorfi smo não destruiu completamente a mineralogia primária dos basaltos.Microgabros originais e cristais de augita são registrados em muitos lugares, preservados junto à associação metamórfi ca. Eles permitem estimar as possíveis temperaturas ígneas entre 900 e 1.100
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