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Master's Dissertation
DOI
https://doi.org/10.11606/D.18.2003.tde-02042007-155703
Document
Author
Full name
Kleber Azevedo Dourado
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Vilar, Orencio Monje (President)
Bueno, Benedito de Souza
Vidal, Delma de Mattos
Title in Portuguese
Condutividade hidráulica de materiais de baixa permeabilidade: desenvolvimento, construção e teste de um sistema de medida
Keywords in Portuguese
Barreira hidráulica
Condutividade hidráulica
GCL
Geocomposto bentonítico
Geosynthetic clay liner
Permeâmetro
Abstract in Portuguese
Este trabalho trata do desenvolvimento, montagem e teste de equipamentos para ensaios de materiais de baixa condutividade hidráulica, o qual inclui sistemas de controle hidráulico de volume constante, permeâmetros do tipo parede flexível e interfaces água-percolante. A vantagem desse arranjo está no maior controle dos ensaios e, notadamente, na redução do tempo de ensaio com emprego do sistema hidráulico de volume constante (sistema fechado), quando comparado aos ensaios que empregam o sistema aberto de controle hidráulico. Para testar o equipamento, foram ensaiados geocompostos bentoníticos (geosynthetic clay liners - GCLs) de fabricação nacional, em corpos de prova moldados com diâmetro de 100 mm e também, em uma mistura de solo com bentonita. Os resultados da condutividade hidráulica obtidos para os geocompostos bentoníticos se situaram na ordem de '10 POT.-9' e '10 POT.-10' cm/s, compatíveis com os publicados na literatura sobre o material, e os ensaios na mistura solo-bentonita produziu resultados na ordem de '10 POT.-8' cm/s, e foram conseguidos com cerca de 3 horas de ensaio. Aborda-se ainda a aplicabilidade da lei de Darcy aos materiais ensaiados.
Title in English
Hydraulic conductivity of low permeability materials: development, construction and test of a measurement system
Keywords in English
Bentonitic geocomposite
GCL
Geosynthetic clay liner
Hydraulic barrier
Hydraulic conductivity
Permeameter
Abstract in English
This work describes the development, construction, calibration and test of equipment for testing low hydraulic conductivity materials, which includes constant volume hydraulic control system, flexible wall permeameters and permeating water interfaces. The advantage of this kind of apparatus is the greater test control, notably, the reduction of test duration due to the use of a constant volume hydraulic system (closed system), when compared to the opened system hydraulic control test. In order to test the equipment, geosynthetic clay liners (GCLs) manufactured in Brazil was used as test specimens of 100 mm diameter and also, a mixture of soil and bentonite. The results of hydraulic conductivity obtained for the GCL were in the range of '10 POT.-9' to '10 POT.-10' cm/s, comparable to what has been published by the specialized literature on this material, and the tests with the soil-bentonite mixture resulted in a conductivity about '10 POT.-8' cm/s, after 3 hours running the test. The applicability of Darcy´s law to the tested materials is also referred to.
 
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dissertacao.pdf (5.97 Mbytes)
Publishing Date
2007-04-03
 
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