Membrane filter properties and application of the filter to undrained cyclic triaxial test of unsaturated materials

Hailong Wang, Junichi Koseki, Tomoyoshi Nishimura, Yukika Miyashita

Research output: Contribution to journalComment/debate

4 Citations (Scopus)

Abstract

Properties of the membrane filter recently introduced as an alternative to the ceramic disk are revealed through diffusion and hydraulic conductivity tests. It is shown that diffusion of air through the membrane filter is significantly affected by suction magnitude and that hydraulic conductivity of the membrane filter can easily be affected by the quality of water used in the test. The application of the membrane filter to the soil-water characteristic curve tests (SWCC tests) shows that similar SWCCs can be obtained by employing pressure plate apparatuses with either the ceramic disks or the membrane filter installed, and that repeatability of the SWCC by using the membrane filter pressure plate apparatus is reasonably good. The application of the membrane filter to the undrained cyclic loading test of unsaturated sandy materials shows that the response (the duration to measure the equilibrated pore-water pressure of unsaturated materials) of the membrane filter pedestal in a modified triaxial system may be as short as ~2 s in certain test conditions,andfairlygoodpore-waterpressureandairpressuremeasurementscan be obtained during undrained cyclic loading with a loading frequency of 0.1 Hz.

Original languageEnglish
Pages (from-to)1196-1202
Number of pages7
JournalCanadian Geotechnical Journal
Volume54
Issue number8
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • Membrane filter
  • Soil-water characteristic curve (SWCC)
  • Undrained cyclic triaxial test
  • Unsaturated material

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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