Water Intake by a Water-Filled Plexiglas Permeameter Cell1
- G. Y. Tsuji and
- D. Swartzendruber2
Water entry into a Plexiglas (acrylic plastic) permeameter cell was measured by the recession of water in capillary standpipes connected to the water-filled cell. Submergence of the permeameter in water demonstrated that the water entry was not caused primarily by a slight leak in the permeameter or by water-vapor diffusion through its walls. Also, the rate was essentially unaffected when the permeameter contained a water-saturated mixture of sand, silt, and bentonite. Calculations for the permeameter in air indicated the observed intake rate to be 20 times that attributable to water-vapor diffusion through the Plexiglas walls, and 1/8 that attributable to direct water absorption as obtained from a maximal handbook value. Hence, it appears that direct absorption by the Plexiglas is the likely cause of water entry into the permeameter.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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