Enhancement of Cement-Based Materials: Mechanisms, Impacts, and Applications of Carbon Nanotubes in Microstructural Modification
Buildings,
Год журнала:
2025,
Номер
15(8), С. 1234 - 1234
Опубликована: Апрель 9, 2025
Carbon
nanotubes
(CNTs)
exhibit
high
strength
and
modulus,
excellent
electrical
thermal
conductivity,
good
chemical
stability,
unique
electronic
optical
properties.
These
characteristics
make
them
a
one-dimensional
nanomaterial
with
extensive
potential
applications
in
fields
such
as
composite
materials,
devices,
energy,
aerospace,
medical
technology.
Cement-based
materials
are
the
most
widely
used
extensively
applied
construction
materials.
However,
these
have
disadvantages
low
tensile
strength,
brittleness,
porosity,
shrinkage,
cracking.
In
order
to
compensate
for
shortcomings,
recent
years,
relevant
scholars
proposed
integrate
CNTs
into
cement-based
Incorporating
not
only
enhances
microstructure
of
but
also
improves
their
mechanical,
electrical,
durability
The
fabrication
process
reviewed
this
paper.
different
effects
on
physical
properties
hydration
due
design
parameters,
dispersion
methods,
temperature
were
analyzed.
results
show
that
compressive
flexural
CNT
0.02%
content
increased
by
9.33%
10.18%
from
3
d
28
d.
terms
reducing
shrinkage
carbonization
resistance
cement
base,
there
is
an
optimal
amount
carbon
nanotubes.
addition
dispersed
reduces
resistivity,
nucleation
promotes
reaction.
general,
under
dosage,
uniform
short
length–diameter
ratio
significant
effect
lifting
effect.
future,
will
develop
multifunctionality,
cost,
realizing
intelligent
self-sensing
self-repair
promoting
green
low-carbon
manufacturing.
Breakthroughs
decentralized
technology
large-scale
key,
they
expected
help
sustainable
civil
engineering
infrastructure.
Язык: Английский
Impact of data-preprocessing approach selection on the accuracy of regression models for estimating properties of recycled aggregate concretes
Innovative Infrastructure Solutions,
Год журнала:
2025,
Номер
10(3)
Опубликована: Фев. 20, 2025
Язык: Английский
Design Methodology and Application Dynamics of Compact Quasi-Zero Stiffness Isolators
Applied Sciences,
Год журнала:
2025,
Номер
15(7), С. 3478 - 3478
Опубликована: Март 22, 2025
With
the
rapid
development
of
precision
instruments,
aerospace,
and
automotive
industries,
demand
for
compact
vibration
isolators
capable
suppressing
low-frequency
vibrations
has
surged.
Although
prior
reviews
have
established
theoretical
framework
quasi-zero
stiffness
(QZS)
isolators,
critical
gaps
persist
in
addressing
their
design
under
strong
nonlinear
dynamics
diverse
engineering
constraints.
This
review
systematically
analyzes
dynamic
characteristics
QZS
systems
effects
evaluates
five
innovative
methodologies
isolators:
special
spring
type,
magnetic
bionic
metamaterials-based
origami-inspired
type.
Key
findings
reveal
that
spring-type
are
simple
to
space-efficient
but
difficult
machine.
Magnetic-type
achieve
ultra-low
start-up
frequencies
face
thermal
instability.
Metamaterial
designs
enable
multifunctional
integration
at
cost
manufacturing
complexity,
while
bionic-inspired
abstract
practical
applications.
We
find
current
research
tends
prioritize
miniaturization
over
synergistic
optimization
load
capacity,
broadband
isolation,
adaptability.
Future
should
focus
on
multi-degree-of-freedom
systems,
coupled
metamaterials-bionic
structures,
active
control.
work
provides
a
key
roadmap
advancing
technology
space-constrained
Язык: Английский
Bidirectional Modeling and Investigation of Quintuple Friction Pendulum Isolators Subjected to Various Seismic Excitations
Advances in Civil Engineering,
Год журнала:
2025,
Номер
2025(1)
Опубликована: Янв. 1, 2025
Recently,
a
novel
generation
of
friction
pendulum
(FP),
known
as
the
“quintuple
(QFP)”
isolator,
was
introduced
to
literature.
The
primary
advantages
this
device
come
from
its
capacity
exhibit
multistage
adaptive
behavior
through
five
effective
pendula
and
nine
operational
regimes,
thereby,
offering
substantial
energy
dissipation
capabilities
smooth
loading
unloading
for
structures
subjected
lateral
loads.
However,
remains
inadequately
understood,
necessitating
further
research
discuss
performance
applicability
system
in
real‐world
scenarios.
This
study
explores
bidirectional
QFP
isolator
under
both
displacement‐controlled
cyclic
earthquake
conditions.
As
part
investigation,
implementation
QFPs
SAP2000
performing
assessment
is
explained
detail.
Moreover,
effect
various
parameters,
including
fault
distance,
peak
ground
acceleration
(PGA)
velocity
(PGV)
ratio,
existence
pulse
characteristics,
period,
investigated.
Besides,
influence
with
differing
periods
damping
ratios
assessed
compared.
Finally,
study’s
findings
are
important
engineers
researchers
working
field.
Язык: Английский
Prediction and parametric assessment of soil one-dimensional vertical free swelling potential using ensemble machine learning models
Advanced Modeling and Simulation in Engineering Sciences,
Год журнала:
2024,
Номер
11(1)
Опубликована: Дек. 27, 2024
Abstract
Investigating
soil
swelling
potential
is
indeed
a
critical
research
area
in
geotechnical
engineering,
given
its
significant
influence
on
the
stability
and
longevity
of
civil
structures.
This
study
aims
to
predict
assess
one-dimensional
vertical
free
soils
using
ensemble
machine
learning
models.
Within
context,
large
dataset
encompassing
wide
array
parameters
from
210
samples,
including
moisture
content,
unit
weight,
plasticity,
clay
will
be
used.
These
are
understanding
behavior
under
varying
environmental
load
conditions.
The
novel
approach
this
lies
application
techniques,
which
offer
robust
framework
analyze
complex,
nonlinear
relationships
within
properties.
Another
key
aspect
parametric
assessment,
where
individual
properties
investigated
feature
importance
partial
dependence
analyses.
analyses
provide
valuable
insights
into
relative
different
behavior.
outcomes
contribute
mechanics
applications
engineering
practical
implications
for
engineers
practitioners.
Besides,
predictive
models
developed
aid
more
informed
decision-making
design
construction
structures,
particularly
swelling-prone
areas.
Язык: Английский