Journal of Rock Mechanics and Geotechnical Engineering,
Journal Year:
2021,
Volume and Issue:
13(3), P. 593 - 602
Published: March 7, 2021
Biochar
has
been
used
as
an
environment-friendly
enhancer
to
improve
the
hydraulic
properties
(e.g.
suction
and
water
retention)
of
soil.
However,
variations
in
densities
alter
soil–biochar
mix.
Such
density
are
observed
agriculture
(loosely
compacted)
engineering
(densely
applications.
The
influence
biochar
amendment
on
gas
permeability
soil
barely
investigated,
especially
for
with
different
densities.
major
objective
this
study
is
investigate
retention
capacity,
biochar-amended
(BAS)
contents
under
varying
degree
compaction
(DOC)
conditions.
In-house
produced
novel
was
mixed
at
rates
(i.e.
0%,
5%
10%).
All
BAS
samples
were
compacted
three
DOCs
(65%,
80%
95%)
polyvinyl
chloride
(PVC)
tubes.
Each
column
subjected
drying–wetting
cycles,
during
which
suction,
content,
measured.
A
simplified
theoretical
framework
estimating
void
ratio
proposed.
experimental
results
reveal
that
addition
significantly
decreased
kg
compared
bare
(BS).
found
be
optimum
decreasing
increase
DOC
kg,65%
>
kg,80%
kg,95%)
a
relatively
low
range
(<
200
kPa)
because
both
treatment
reduce
connected
pores.
