A
vast
amount
of
waste
disposable
face
masks
(FM)
has
threatened
the
ecosystem
since
COVID-19
became
a
pandemic.
Given
urgency
situation,
this
study
assessed
potential
utilization
FM
fibers
to
reinforce
subgrade
in
permafrost
regions.
The
effect
contents
(0.5%,
1%,
and
1.5%)
length-width
(LW)
ratios
(1,
2,
3)
frozen
silty
clay
specimens
(-10oC)
with
different
initial
moisture
content
(w=15%,
20%,
25%)
on
stress-strain
behavior,
including
peak
deviatoric
stress
(q),
increment
(λ),
elastic
modulus
(E0)
was
analyzed.
pore
structure
change
mechanism
under
influence
w
further
revealed
via
Nuclear
Magnetic
Resonance
(NMR).
results
indicated
that
incorporation
improved
soil
strength
at
certain
w,
while
LW
ratio
were
found
have
effects
q
values.
most
effective
reinforcement
can
be
identified
w=20%,
according
relatively
large
λ
values
(29.2%
~
79.1%).
Moreover,
E0
higher
smaller,
which
explained
by
cracks
generated
due
water-ice
phase
uneven
distribution
FM.
NMR
more
remarkable
had
less
water
relaxation
characteristics.
This
pointed
out
tension
its
bonding
particles
played
leading
role
behavior.
Marine Georesources and Geotechnology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 14
Published: March 25, 2025
This
study
reveals
the
mechanical
behavior
of
silt
in
Yellow
River
floodplain
under
3D
stress.
A
true
triaxial
apparatus
was
used
to
conduct
consolidated
drained
shear
tests
different
intermediate
principal
stress
coefficients
(b)
and
consolidation
confining
pressures
investigate
influence
on
deformation
strength
silt.
The
stress-strain
curves
exhibited
strong
strain-hardening
characteristics
during
shearing.
Due
enhanced
particle
interlocking
microstructural
reorganization,
demonstrated
complex
b-dependent
characteristics.
cohesion
rose
with
increasing
b,
whereas
internal
friction
angle
followed
a
non-monotonic
pattern,
decreasing
slightly
as
b
approached
1.
envelope
fell
between
that
predicted
by
Lade-Duncan
extended
von
Mises
criteria.,
which
is
best
generalized
nonlinear
criterion
when
soil
parameter
α
0.533.
findings
reveal
stress-path-dependent
mechanisms
provide
essential
parameters
for
optimizing
design
underground
engineering
projects
this
region.
Case Studies in Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
61, P. 105026 - 105026
Published: Aug. 25, 2024
Triaxial
compression
tests
were
conducted
on
frozen
sandy
soils
under
a
constant
minimum
principal
stress
(σ3
=
1.6
MPa)
and
various
intermediate
stresses
(σ2
1.6,
3.4,
5.2,
7.0,
8.8,
9.8
MPa).
The
purpose
of
the
research
was
to
investigate
influence
mechanical
properties
soil,
establish
constitutive
model
predict
stress-strain
relationship
soil
complex
state.
test
results
obtained
demonstrated
that
crack
damage
failure
initially
increase
then
decrease
with
an
in
stress.
However,
initiation
exhibits
initial
up
specific
value,
after
which
it
stabilizes.
From
perspective
propagation,
mechanism
strength
discussed.
With
variation
state,
difference
between
strain
gradually
increases.
deformation
revealed
using
superposition
principle
Poisson's
effect.
Finally,
based
Weibull
distribution
Drucker-Prager
criterion
can
accurately
represent
relationships
true
triaxial
states.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(23), P. 11419 - 11419
Published: Dec. 8, 2024
In
this
paper,
a
comprehensive
series
of
dynamic
triaxial
tests
were
conducted
to
delve
into
the
influence
temperature
and
moisture
content
on
behavior
frozen
silty
clay.
Upon
scrutinizing
experimental
outcomes
under
prolonged
reciprocal
cyclic
loading,
insights
gained
how
varying
temperatures
contents
impact
cumulative
permanent
strain
(CPS)
critical
stress
(CDS)
The
results
show
that
variation
curves
CPS
with
number
loadings
significant
changes
at
different
contents.
Additionally,
based
assessment
vertical
recorded
100th
1000th
loading
iterations,
criteria
for
assessing
plastic
stability
creep
threshold
clay
devised.
Consequently,
an
analysis
was
delineate
correlation
between
in
strains
stresses
applied
within
clay,
resulting
formulation
curves.
relationship
CDS
affected
by
water
analyzed.
limits
showed
slowly
increasing
trend
decreasing
Processes,
Journal Year:
2023,
Volume and Issue:
11(10), P. 2983 - 2983
Published: Oct. 15, 2023
Coastal
reclamation
projects
generate
an
accumulation
of
wastewater
and
waste
soil,
resulting
in
highly
saturated
soft
soil.
Presently,
there
is
a
scarcity
research
regarding
the
lightweight
solidification
three-dimensional
mechanical
properties
these
soils.
Additionally,
dearth
specialized
models
for
stabilizing
soils
containing
using
technology,
pertinent
engineering
solutions
are
lacking.
By
introducing
solidifying
agents
foaming
to
treat
fill
novel
type
solidified
material
produced,
imparting
strength.
This
study
investigates
its
properties.
During
triaxial
tests
with
equal
stress
(σ3)
b
values,
softening
curve
noticeably
diminished
at
=
0.25.
In
plane
strain
test,
cohesion
increased
by
10.7%
compared
traditional
tests,
internal
friction
angle
11%.
Subsequently,
Cambridge
model
was
established.
At
elevated
confining
pressures,
corrected
closely
approximated
test
curve,
demonstrating
minimum
accuracy
approximately
96%
pressure
20
KPa.
These
findings
offer
valuable
numerical
references
theoretical
foundation
efficient
utilization
