Acta Scientiarum Polonorum

The paper concerns a range of applicability in evaluation of coeffi cient of permeability
on the basis of indirect approach in various soils. Considered indirect approach is
based on Casagrande and Taylor’s methods of determination of coeffi cient of consolidation
(cv). Tests were carried out on six kinds of soils containing various amount of fi nes from
the range 9–99,5%. Specimens were reconstituted in medium size consolidometer and then
loaded in stages. Independently, coeffi cient of permeability was determined directly by
fl ow pump technique at the end of consolidation stage for each material. Convergence of
results of both methods was assumed as criterion of evaluation of range of applicability of
indirect approach in determination of coeffi cient of permeability with respect to grain size
distribution.