Hydraulic conductivity of compacted soils in flexible wall permeameter tests / Condutividade hidráulica de solos compactados em ensaios com permeâmetro de parede flexível

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The hydraulic conductivity of five compacted soils from São Paulo state is studied aiming at their use in lining systems. Permeability tests were performed in flexible wall permeameters with constant volume hydraulic control system (closed system), rigid wall permeameters and contraction tests. It was verified that lower values of hydraulic conductivity are associated to molding water content equal or larger than optimum water content of soil as measured in standard Proctor. Molding water content beyond optimum and compaction degree lager than 100% did not cause significant reduction on hydraulic conductivity, which tends to stabilize when those parameters are reached. It is proposed ideal conditions of compaction for four of five compacted soils studied with hydraulic conductivity not lager than 10 POT.-7 cm/s, suggested value for lining systems. The axial and volumetric shrinkage was not influenced by water content and compaction degree, for specimen compacted on ideal conditions suggested here. The hydraulic conductivity results of greatness lower when compared to the results of the flexible wall permeameter, although that difference gets smaller with the rise of compaction degree

ASSUNTO(S)

aterros sanitários flexible wall permeameter barreiras impermeáveis compacted soils hydraulic conductivity shrinkage solos compactados landfills contração liners permeâmetro de parede flexível condutividade hidráulica

ACESSO AO ARTIGO

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