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Transient- and Steady-flow Experiments Testing Theory of Water Flow in Saturated Bentonite¹

ABSTRACT

The theory of water flow in a saturated, swelling clay has recently been criticized. This criticism concerns possible effects on the material characteristics of particle re-orientation during transient flow, as well as suggestions that the flux equation (Darcy's law) may be inappropriate to such systems.

This paper examines these problems by comparing data from transient- and steady-flow experiments with bentonite.

The data from all experiments are mutually consistent within the experimental error. It is concluded that Darcy's law is valid for this material and that the conductivity/water content, and water content/suction relationships are well defined.

¹ Contribution from CSIRO, Australia.

² Principal Research Scientist, CSIRO Div. of Environ. Mech., P.O. Box 821, Canberra City, A.C.T. 2601, Australia.

Received for publication May 9, 1977. Accepted for publication August 15, 1977.