TY - JOUR
T1 - Membrane filter properties and application of the filter to undrained cyclic triaxial test of unsaturated materials
AU - Wang, Hailong
AU - Koseki, Junichi
AU - Nishimura, Tomoyoshi
AU - Miyashita, Yukika
N1 - Funding Information:
This work was supported in part by the National Science Foundation -CBET CAREER award ( 1453098 ) provided to Josephine B. Allen and in part by the National Heart, Lung, And Blood Institute of the National Institutes of Health under Award Number F31HL147445 to Bryan D. James. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Science Foundation or the National Institutes of Health. We thank the staff at the University of Florida Nanoscale Research Facility for their continued excellence in service especially engineer Kristy Schepker for her help performing the XRD measurements and associate engineer Nicholas Rudawski for his help in taking the TEM and SEM micrographs.
Publisher Copyright:
© 2017, Canadian Science Publishing. All rights reserved.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Membrane filter
KW - Soil-water characteristic curve (SWCC)
KW - Undrained cyclic triaxial test
KW - Unsaturated material
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U2 - 10.1139/cgj-2016-0507
DO - 10.1139/cgj-2016-0507
M3 - Comment/debate
AN - SCOPUS:85026385078
SN - 0008-3674
VL - 54
SP - 1196
EP - 1202
JO - Canadian Geotechnical Journal
JF - Canadian Geotechnical Journal
IS - 8
ER -