Due
to
detrimental
effects
of
expansive
soil
in
Jimma,
non-woven
geotextiles
have
been
proposed
as
a
solution
address
the
challenges.
This
research
focused
on
engineering
properties
soil,
specifically
impact
reinforcement
compaction,
California
Bearing
Ratio
(CBR),
and
moisture
variation
within
pavement
layer.
The
average
values
Optimum
Moisture
Content
(OMC)
Maximum
Dry
Density
(MDD)
for
natural
were
found
be
25.02%
1.48
g/cm3,
respectively.
After
with
geotextiles,
MDD
increased
1.62
while
OMC
remained
nearly
same.
soaked
CBR
was
determined
2.38%,
indicating
that
it
unsuitable
subgrade
material.
However,
after
reinforcement,
there
12.24%
improvement
CBR,
had
positive
bearing
capacity
soil.
suggests
strength
thickness
contributed
improved
compaction
study
also
investigated
migration
Non-woven
impregnated
at
various
depths,
levels
measured
each
middle
layer
lowest
content
among
all
layers,
suggesting
effectively
controlled
migration.
Hence,
this
confirms
geotextiles'
efficacy
against
by
controlling
enhancing
structural
performance.
Overall,
prove
valuable
improving
Journal of Engineering Research,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Aug. 1, 2023
This
study
compares
the
efficacy
of
geopolymerized
bagasse
ash
(GB)
and
quarry
dust
(GQ)
with
traditional
flay
ash-based
geopolymer
considering
strength
properties
a
subgrade.
Geopolymerized
composited
binary
admixture
(GBA)
was
constituted
by
incorporating
optimum
percentages
GQ
GB,
on
basis
maximum
reduction
70%
52%
in
plasticity
index
value
respectively.
Then
samples
for
tests
such
as
unconfined
compression
California
bearing
ratio
were
remolded
using
standard
modified
compaction
parameters.
Also,
mineralogical
microstructural
analyses
conducted
based
SEM
EDS.
The
influence
curing
percentage
geopolymers
also
investigated
properties.
performance
GBA
is
equivalent
to
fly-ash-based
(GF)
like
qu
CBR
ensuring
more
than
200%
increase
at
20%
15%
content
However,
these
contents,
ductility
GBA-treated
107%
higher
GF
making
this
suitable
under
dynamic
load.
Formation
gel
((N,
C)-A-S-H)
confirmed
elemental
but
microstructure
treated
sample
porous
sample,
which
provides
some
advantage
particles
reorientation
load
before
failure.
proposed
multi-waste
has
significant
implications
waste
management,
its
implementation
construction
two-lane
subgrade
covering
distance
1
kilometer
may
enable
repurposing
1313
tons
assorted
solid
waste.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 2, 2025
In
the
framework
of
sustainable
development
and
environmental
preservation,
this
research
aims
to
improve
stability
frost
resistance
sulfate
saline
soil
by
utilizing
industrial
solid
waste.
Geopolymer
materials
containing
fly
ash
(FA)
activated
different
NaOH
concentrations
were
studied
for
study
on
stabilized
with
soil,
used
ranged
from
0.1
0.9.
This
investigates
impact
molar
concentration
number
freeze-thaw
cycles
microstructure
strength
incorporating
FA
geopolymer.
The
XRD,
FTIR,
TG
studies
NaOH-excited
revealed
that
gel
material
grew
increasing
concentration.
increased
then
declined
as
increased,
an
optimum
excitation
0.5
M.
After
28
days
curing
at
20
°C,
its
UCS
splitting
7.18
MPa
1.89
MPa,
respectively.
residual
values
after
5
(12
hours
freezing
followed
12
thawing
+20
°C)
optimal
46.35%
39.92%,
International Journal of Geotechnical Engineering,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 11
Published: March 9, 2025
This
study
investigates
the
influence
of
rainfall
patterns
(RP)
on
behaviour
expansive
soil
through
a
series
large-scale
column
experiments.
The
mass
was
compacted
to
an
initial
water
content
10%
and
dry
density
either
1.0
g/cm3
or
1.3
g/cm3.
same
total
amount
introduced
mass;
however,
over
different
times:
a)
6
days
(RP1)
mimic
extreme
event
b)
14
(RP2)
simulate
prolonged
with
low
daily
intensity.
experimental
data
changes
in
content,
suction,
vertical
displacements
revealed
that
swell
influenced
by
influx,
where
RP2
associated
higher
compared
RP1.
It
observed
rate
depended
wetting
front
propagation
density,
while
decreased
depth
active
zone.
Road Materials and Pavement Design,
Journal Year:
2023,
Volume and Issue:
25(9), P. 1910 - 1932
Published: Nov. 27, 2023
This
study
evaluates
the
quality
and
mechanical
performance
of
various
shapes
reclaimed
concrete
aggregates
(RCAs),
including
elongated,
cone-shaped,
angular,
ordinary
mix,
in
comparison
to
fresh
(FAs).
The
RCAs
are
treated
with
fly
ash-based
geopolymer,
effects
percentages
geopolymer
content
on
geotechnical
properties
modified
investigated.
finds
that
angular
shape
an
RCA
exhibits
more
strength
than
other
shapes,
use
significantly
improves
characteristics
by
up
10%.
research
also
shows
geopolymer-treated
subbase
layer
flexible
pavements
can
lead
a
reduction
required
thickness
base
layer,
resulting
significant
cost
savings
curtailment
CO2
emission
compared
FAs.
