Probe into the mechanism of water absorption-disintegration of coal gangue aggregates and its influence on concrete properties
Journal of Building Engineering,
Год журнала:
2025,
Номер
unknown, С. 112321 - 112321
Опубликована: Март 1, 2025
Язык: Английский
Impact of Clay Minerals on the Characteristic Strength and Nonlinear Dissipative Energy Modeling of Water-Saturation Mudstone
Rock Mechanics and Rock Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 28, 2025
Язык: Английский
Study on the deformation and failure mechanism of tertiary water-rich soft rock tunnels based on the moisture migration-fracture coupling model
Tunnelling and Underground Space Technology,
Год журнала:
2025,
Номер
163, С. 106715 - 106715
Опубликована: Май 5, 2025
Язык: Английский
Deterioration Mechanism and Statistical Damage Constitutive Model of Red-Bed Soft Rock with Different Moisture Content
Pure and Applied Geophysics,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 13, 2024
Язык: Английский
Impact of Temperature on the Hygroscopic Behavior and Mechanical Properties of Expansive Mudstone
Energies,
Год журнала:
2024,
Номер
17(24), С. 6491 - 6491
Опубликована: Дек. 23, 2024
Aiming
at
the
large-scale
nonlinear
deformation
of
roadway
in
Liangjia
Coal
Mine,
Shandong
Province,
mudstone
1602
working
face
is
taken
as
research
object.
A
high-precision
weathering
test
system
integrating
monitoring
and
control
was
developed,
tests
expanded
were
carried
out
10
°C,
20
30
°C
40
°C.
The
results
show
that
hygroscopic
curves
demonstrate
a
growth
trend
different
temperatures,
influence
temperature
on
less
than
20%.
From
overall
law,
it
can
be
roughly
divided
into
three
stages:
strong
stage,
deceleration
stage
stable
stage.
maximum
expansion
rates
samples
4.1%,
5.3%,
6.2%
6.8%,
respectively,
water
content
corresponding
to
ambient
humidity
generally
“concave”.
mechanical
properties
decrease
increases,
compressive
strength
decreases
by
16~50%.
linear
degradation
obvious,
gradual
peak
strain
indicates
plasticity
rock
increases
elastic
modulus
linearly.
Язык: Английский
Damage Creep Model and Application for Sandy Mudstone Considering the Effect of Immersion Deterioration
Journal of Mechanics,
Год журнала:
2024,
Номер
40, С. 325 - 335
Опубликована: Янв. 1, 2024
Abstract
Aiming
at
the
problem
of
performance
degradation
and
large
deformation
sandy
mudstone
after
immersion
in
water,
compression
test
is
carried
out.
The
damage
deterioration
law
strength
elastic
modulus
immersed
rock
mass
analyzed,
function
relationship
between
variable
soaking
time
obtained
by
fitting.
Combined
with
Hoek-Brown
criterion
Mohr-Coulomb
criterion,
calculation
method
instantaneous
cohesion
internal
friction
angle
damaged
derived
based
on
tangent
method,
equivalent
which
can
effectively
characterize
nonlinear
characteristics
given.
Based
built-in
creep
model
Cvisc
Flac3D,
a
given
introducing
factor
mass,
more
suitable
for
describing
mudstone.
validity
verified
comparing
measured
results.
Язык: Английский
Application of clay minerals in the synthesis of Cretaceous mudstones and microstructural analysis of their deterioration mechanism
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 18, 2024
Abstract
The
Cretaceous
mudstone
undergoes
significant
argillization
and
disintegration
when
in
contact
with
water
due
to
its
high
content
of
clay
minerals,
posing
a
severe
challenge
the
stability
roadways
coal
mines
during
construction
operation.
This
research
aimed
prepare
water-sensitive
mudstone–like
materials
by
method
mineral
composition
similar
that
natural
reproduce
mechanical
hydraulic
properties
rocks
meanwhile
reveal
deteriorating
effect
minerals
on
microstructure
macroscopic
properties.
Using
binary
clay-gypsum
mixtures
considering
aggregate-binder
ratio,
iron
sand
fine
sand,
powder
aggregate
as
controlling
factors,
16
groups
proportioning
schemes
were
established
using
orthogonal
test
series
physic
experiments
conducted
determine
Subsequently,
sensitivity
analysis
was
applied
characterize
effects
different
influencing
factors
mudstone-like
materials'
result
shows
distribution
ranges
physical,
mechanical,
parameters
newly
prepared
material
overlap
noticeably
those
mudstone,
suggesting
this
new
can
better
meet
requirements
modeling
mudstone.
In
addition,
range
showed
ratio
dominant
factor
for
material's
UCS,
E,
cohesion,
while
had
density
time.
Then,
qualitative
quantitative
microstructural
carried
out
SEM
images
four
samples
based
kaolinite-gypsum
Avizo
software
via
dynamic
threshold
segmentation
method.
indicates
microscopic
parameters,
such
pore
size
distribution,
equivalent
diameter,
porosity,
fractal
dimension,
etc.,
are
significantly
altered
increase
kaolinite
content,
resulting
marked
deterioration
micromechanical
mineralogical
change
transforms
cementation
type
from
homogeneous
dense
crystalline
anisotropic
loose
argillaceous
cementation,
exhibiting
strong
extremely
weak
macro
properties,
which
explains
mechanism
mudstones
micro
point
view.
Importantly,
synthesis
mineralogy
proposed
study
may
be
widely
employed
rock
mechanics
engineering.
Язык: Английский
Application of clay minerals in the synthesis of cretaceous mudstones and microstructural analysis of their deterioration mechanism
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Ноя. 27, 2024
The
Cretaceous
mudstone
undergoes
significant
argillization
and
disintegration
when
in
contact
with
water
due
to
its
high
content
of
clay
minerals,
posing
a
severe
challenge
the
stability
roadways
coal
mines
during
construction
operation.
This
research
aimed
prepare
water-sensitive
mudstone–like
materials
by
method
mineral
composition
similar
that
natural
reproduce
mechanical
hydraulic
properties
rocks
meanwhile
reveal
deteriorating
effect
minerals
on
microstructure
macroscopic
properties.
Using
binary
clay-gypsum
mixtures
considering
aggregate-binder
ratio,
iron
sand
fine
sand,
powder
aggregate
as
controlling
factors,
16
groups
proportioning
schemes
were
established
using
orthogonal
test
series
physic
experiments
conducted
determine
Subsequently,
sensitivity
analysis
was
applied
characterize
effects
different
influencing
factors
mudstone-like
materials'
result
shows
distribution
ranges
physical,
mechanical,
parameters
newly
prepared
material
overlap
noticeably
those
mudstone,
suggesting
this
new
can
better
meet
requirements
modeling
mudstone.
In
addition,
range
showed
ratio
dominant
factor
for
material's
UCS,
E,
cohesion,
while
had
density
time.
Then,
qualitative
quantitative
microstructural
carried
out
SEM
images
four
samples
based
kaolinite-gypsum
Avizo
software
via
dynamic
threshold
segmentation
method.
indicates
microscopic
parameters,
such
pore
size
distribution,
equivalent
diameter,
porosity,
fractal
dimension,
etc.,
are
significantly
altered
increase
kaolinite
content,
resulting
marked
deterioration
micromechanical
mineralogical
change
transforms
cementation
type
from
homogeneous
dense
crystalline
anisotropic
loose
argillaceous
cementation,
exhibiting
strong
extremely
weak
macro
properties,
which
explains
mechanism
mudstones
micro
point
view.
Importantly,
synthesis
mineralogy
proposed
study
may
be
widely
employed
rock
mechanics
engineering.
Язык: Английский