The effect of microwave curing on the static and dynamic mechanical properties and thermal brittleness of coal gangue concrete
Construction and Building Materials,
Год журнала:
2025,
Номер
463, С. 140025 - 140025
Опубликована: Янв. 26, 2025
Язык: Английский
Mechanical properties of alkali activated geopolymer cement mortar for non vibratory compacted trench backfilling
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Апрель 10, 2025
In
this
study,
fly
ash
and
metakaolin
are
examined
as
replacements
in
cementitious
materials
to
reduce
environmental
pollution.
An
orthogonal
test
was
conducted
with
nine
groups
of
geopolymer
mortars
prepared
by
varying
the
ratio
amount
composite
alkali
activator
(NaOH-Na2SiO3).
The
optimal
mortar
its
feasibility
a
non-vibrated
pipe
trench
backfill
were
using
fluidity
mechanical
property
tests.
Combined
microscopic
tests,
pore
structure
hydrate
phase
analysed.
results
showed
that
30%
(F30),
10%
(M10),
4%
(A4)
had
best
performance
achieved
compressive
flexural
strengths
17.2
MPa
5.55
MPa,
respectively,
157
mm;
these
meet
requirements
for
materials.
addition,
according
strength
comparison
different
groups,
better
effect
on
properties
material
than
ash.
Microscopic
analysis
revealed
hydratable
substances
such
potassium
feldspar
montmorillonite
decomposed
under
action
OH-
formed
C-(A)-S-H
N-A-S-H
gels,
along
A-type
zeolite
crystals;
improved
density
mortar.
This
study
provides
valuable
insights
into
potential
use
alkali-activated
vibration-free
pipeline
trenches.
Язык: Английский
Detecting impact damage and characterizing pore structure in fractured rocks using nuclear magnetic resonance technology
Measurement,
Год журнала:
2025,
Номер
unknown, С. 117649 - 117649
Опубликована: Апрель 1, 2025
Язык: Английский
Gradation reconstruction of uranium heap leaching tailings and its impact on filling performance
Case Studies in Construction Materials,
Год журнала:
2025,
Номер
22, С. e04713 - e04713
Опубликована: Апрель 28, 2025
Язык: Английский
Pore structure and mechanical characteristics of CRS mortar based on NMR and fractal theory
Construction and Building Materials,
Год журнала:
2024,
Номер
457, С. 139459 - 139459
Опубликована: Дек. 1, 2024
Язык: Английский
Research on the Full Life Cycle Deformation, Stress Response, and Dynamic Fatigue Performance of Concrete Structures in Pump Stations
Buildings,
Год журнала:
2024,
Номер
14(12), С. 4052 - 4052
Опубликована: Дек. 20, 2024
Concrete
structures
are
subjected
to
static
and
fatigue
loads
during
long-term
service,
temperature
changes
can
cause
in
the
volume
of
concrete,
leading
stress
damage,
which
affect
mechanical
properties
service
life
a
structure.
In
response
current
lack
three-dimensional
analysis
exploration
behavior
damage
evolution
processes
concrete
under
variable
environmental
conditions,
this
paper
relies
on
Fenghuangjing
Pump
Station
project
involving
Yangtze
River
Huaihe
constructs
thermo-mechanical-fatigue-damage
model
based
power
exponent
function
constitutive
model.
By
using
multiple
coupled
simulation
calculations
predict
performance
structures;
analyzing
stress,
deformation,
from
construction
operation;
comparing
measured
data;
dynamically
optimizing
inversion
obtain
thermal
parameters;
proposing
key
control
warning
indicators
thresholds,
research
results
provide
reference
for
safe
operation
similar
projects.
Язык: Английский