Closure to Discussion by K. Prakash and A. Sridharan of Atterberg limits and remolded shear strength water content relationships [Geotechnical Testing Journal, Vol. 36, No. 6, pp. 939 947]
Citation:
O'Kelly B.C., Closure to Discussion by K. Prakash and A. Sridharan of Atterberg limits and remolded shear strength water content relationships [Geotechnical Testing Journal, Vol. 36, No. 6, pp. 939 947], Geotechnical Testing Journal, 37, 4, 2014, 729 - 731Download Item:
Abstract:
This article presents the closure to the discussion on the Geotechnical Testing
Journal,
GTJ20130012
, Vol. 36, No. 6, which had
three
stated
objectives
: (i)
a
critical
assessment of
empirical
methods for predicting remolded
undrained strength (s
ur
) at different
water contents on the basis of measured Atterberg limit
value
s; (ii) a review of s
ur
values
mobilized at the Casagrande
liquid limit (
LL) and
plastic limit (
PL) conditions and hence the
strength variation over the plas
tic range; and (iii) a new approach
was propose
for predicting
s
ur
values mobilized
at
different water contents.
The
original
article stated
the importance of
clay mineralogy on clay behavior
. A
referenced
comment was made regarding
discourse
by
other researchers
in recent literature on the link between mineralogy and differences in
strengths at LL determined using the Casagrande cup and fall cone approaches.
A
lthough
outside the immediate scope of the original article, this closure presents th
e opportunity to
elaborate on this discourse
since specifically raised by the discussers
.
The discussers also
raised an unrelated but important point, namely attempts
by
several researchers of late
to
determine the PL
using
variants of the fall cone method
. The author concurs with the
discussers that
these
approaches
deduce a strength
-
related
reference water content that is
fundamentally different from
the lower water content limit for soil workability,
which
the
Casagrande PL can be considered
Author's Homepage:
http://people.tcd.ie/bokellyDescription:
PUBLISHED
Author: O'Kelly, Brendan C.
Type of material:
Journal ArticleSeries/Report no:
Geotechnical Testing Journal37
4
Availability:
Full text availableKeywords:
Atterberg limits, clay, fall cone, mineralogy, shear strengthSubject (TCD):
GeotechnicsMetadata
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