Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(16), P. 7246 - 7246
Published: Aug. 17, 2024
In
cold
regions,
saline
soils
can
cause
dissolution,
settlement,
and
salt
expansion
of
the
roadbed
under
influence
freeze–thaw
cycles,
so
they
need
to
be
stabilized
during
road
construction.
this
study,
lime,
fly
ash
(FA),
polyacrylamide
(PAM)
were
used
stabilize
sulfate
soils,
subjected
unconfined
compressive
strength
test
(UCS),
splitting
test,
cycle
tests
(FTs).
The
stabilization
mechanism
three
materials
on
was
also
studied
via
scanning
electron
microscopy
(SEM),
X-ray
diffraction
(XRD),
Fourier-transform
infrared
spectroscopy
(FTIR),
thermogravimetric
analysis
(TG),
photoelectron
(XPS).
results
showed
that
addition
FA,
PAM
improve
mechanical
properties
frost
resistance
soils.
After
28
d
curing,
UCS
FA-,
PAM-,
lime-stabilized
increased
by
at
least
55%,
23%,
1068%,
respectively,
161%,
75%,
2720%,
respectively.
five
residual
ratios
(BDRs)
L2
(lime
8%),
F2
(FA
11%),
P2
(PAM
1%)
71.78%,
56.42%,
39.05%,
17.95%,
decreasing
trend
tended
stable.
lime
FA
chemically
stabilized,
their
better
than
physical
PAM.
Environmental Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 17
Published: Jan. 27, 2025
This
study
introduces
a
novel
landfill
cover
material,
employing
lake
sediment
as
substrate,
stabilised
with
fly
ash,
slag,
desulfurisation
gypsum
and
construction
waste.
The
mechanical
properties,
including
shear
strength
parameters,
unconfined
compressive
strength,
hydraulic
conductivity,
volumetric
shrinkage,
water
content,
of
the
solidified
sludge
were
evaluated.
microscopic
mechanism
investigated
through
XRD,
FTIR,
SEM-EDS
techniques.
A
three-layer
composite
capping
system
for
landfills
is
proposed,
comprising
an
upper
capillary
barrier
layer,
middle
drainage
layer
bottom
impermeable
.
Indoor
rainfall
simulation
tests
conducted
to
assess
retention
performance
this
under
repeated
moderate,
heavy,
torrential
events.
early
exhibited
rapid
development,
cohesion
internal
friction
angle
reaching
382.56
kPa
57.67°,
respectively,
after
3
days.
After
28d,
ranged
from
6.93
14.29
MPa,
conductivity
between
3.98–23.1
×
10−8cm/s.
hydration
reactions
industrial
waste
residues
resulted
in
formation
Ettringite,
Gypsum,
hydrous
calcium
(aluminum)
silicates.
Ettringite
Gypsum
crystals
formed
support
framework,
while
generation
gel-like
substances
such
C-S-H
C-A-S-H
facilitated
product
aggregation.
RSM
was
employed
optimise
material
ratio
sludge,
Pearson
coefficient
correlation
analysis.
provides
valuable
data
designing
systems
offers
new
approach
co-disposal
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: July 23, 2024
The
treatment,
disposal,
and
resource
utilization
of
waste
mud
are
challenges
for
engineering
construction.
This
study
investigates
the
road
performance
mud–solidified
soil
explains
how
solidifying
materials
influence
strength
deformation
characteristics
mud.
Unconfined
compressive
tests,
consolidated
undrained
triaxial
shear
resonant
column
consolidation
compression
tests
were
conducted
to
evaluate
solidification
effect.
test
results
show
that
with
an
increase
in
cement
content
from
5
9%,
unconfined
increased
by
over
100%,
curing
time
was
extended
3
28
days,
approximately
70%.
However,
initial
water
40
60%
reduced
50%.
With
cohesion
friction
angles
78%
24%,
respectively.
modulus
under
dynamic
38%
strain
corresponding
a
damping
ratio
decay
70%
decreased
nearly
11%.
coefficient
55%.
Scanning
electron
microscopy
X-ray
diffraction
showed
higher
led
formation
more
hydration
reaction
products,
especially
AlPO4,
which
can
effectively
fill
pores
between
particles,
enhance
bonding
form
skeleton
particles
improve
compactness.
Consequently,
significantly
while
its
compressibility
decreased.
provide
data
support
solidified
subgrade.
Materials,
Journal Year:
2024,
Volume and Issue:
17(18), P. 4448 - 4448
Published: Sept. 10, 2024
In
the
context
of
efforts
aimed
at
reducing
carbon
emissions,
utilization
recycled
aggregate
soil
mixes
for
stabilization
has
garnered
considerable
interest.
This
study
examines
mechanical
properties
mixed
samples,
varying
by
dosage
a
soft
curing
agent
C,
R
content,
and
duration.
Mechanical
evaluations
were
conducted
using
unconfined
compressive
strength
tests
(UCS),
field
emission
scanning
electron
microscopy
(FESEM),
laser
diffraction
particle
size
meter
(PSD).
The
results
indicate
that
samples
first
increases
then
decreases
with
higher
dosages
aggregate,
reaching
optimal
20%
dosage.
Similarly,
an
increase
in
enhances
strength,
peaking
20%.
maximum
soils
is
achieved
28
days
under
various
proportions.
introduction
leads
to
formation
flocculent
structure,
as
observed
FESEM,
which
contributes
enhanced
mixes.
Specimens
prepared
combination
maintained
constant
moisture
content
20%,
cured
exhibit
balance
between
economic,
environmental,
engineering
performance.
Materials,
Journal Year:
2024,
Volume and Issue:
17(10), P. 2177 - 2177
Published: May 7, 2024
In
order
to
overcome
the
problems
of
high
economic
and
environmental
costs
a
traditional
ordinary
portland
cement-based
binder,
this
study
used
self-combusted
coal
gangue
(SCCG),
granulated
blast
furnace
slag
(GBFS)
phosphorous
(PS)
prepare
novel
SCCG-GBFS-PS
(SGP)
ternary
alkali-activated
binder
for
solidifying
silty
soft
clay
(SC).
Firstly,
parameters
SGP
were
optimized
using
orthogonal
experiments.
Then
effects
content
(mass
ratio
SGP-solidified
soil),
initial
water
SC
SC'
SC)
types
additives
on
unconfined
compressive
strength
(UCS)
soil
analyzed.
Finally,
hydration
products
microstructure
analyzed
investigate
solidification
mechanism
binder.
The
results
showed
that
optimal
mass
GBFS
PS
is
2:1,
alkali
activator
Na
