Materials Science-Poland,
Journal Year:
2024,
Volume and Issue:
42(2), P. 125 - 142
Published: June 1, 2024
Abstract
Concrete
structures
are
extremely
vulnerable
to
fire
damage,
which
greatly
undermines
their
structural
strength
and
durability.
Recently,
there
has
been
a
concerted
effort
develop
sustainable
concrete
materials.
Geopolymer
(GPC)
is
promising
substitute
for
conventional
cement
due
its
use
of
recycled
However,
despite
the
positive
effect
it
on
environment,
GPC
susceptible
heat,
can
cause
deteriorate
over
time.
In
response
this
issue,
carbon-fiber
reinforced
polymer
(CFRP)
proposed
as
means
strengthening
heat-damaged
GPC.
This
study
aims
investigate
effectiveness
CFRP-strengthened
metakaolin-based
made
from
reclaimed
asphalt
pavement
(RAP)
aggregate.
Three
mixtures
were
used,
in
aggregate
was
substituted
with
RAP
at
0%,
25%,
50%
replacement
levels.
addition,
cylinders
tested
under
ambient
conditions
subjected
300°C.
The
results
indicated
that
substitution
25%
significantly
reduced
compressive
by
39.1%,
while
resulted
66.8%
decrease
compared
control
mixture.
CFRP
sheets
strengthen
specimens
proven
be
effective
increasing
resistance
heated
restoring
confinement
energy
original
state
before
reaching
ultimate
failure
point.
increased
strengths,
increases
ranging
87.7%
368.8%
26°C
58.8%
153.9%
300°C,
each
mixture’s
unstrengthened
specimen.
Materials,
Journal Year:
2023,
Volume and Issue:
16(9), P. 3478 - 3478
Published: April 29, 2023
The
demand
for
geopolymer
materials
is
constantly
growing.
This,
in
turn,
translates
into
an
increasing
number
of
studies
aimed
at
developing
new
approaches
to
the
methodology
synthesis.
range
potential
applications
geopolymers
can
be
increased
by
improving
properties
components.
Future
directions
on
aim
showing
excellent
mechanical
but
also
demonstrating
significant
improvement
thermal,
magnetic,
or
sorption
characteristics.
Additionally,
current
efforts
focus
not
only
materials'
obtaining
them
as
a
result
environment-friendly
performed
line
with
circular
economy
assumptions.
Scientists
look
smart
and
economical
solutions
such
that
small
amount
modifier
will
translate
functional
properties.
Thus,
special
attention
paid
application
nanomaterials.
This
article
presents
selected
nanoparticles
incorporated
matrices,
including
carbon
nanotubes,
graphene,
nanosilica,
titanium
dioxide.
review
was
prepared
employing
scientific
databases,
particular
given
nanocomposites.
purpose
this
discuss
nanocomposites
context
sustainable
development
approach.
Importantly,
main
influence
these
nanomaterials
physicochemical
Such
combination
technology
nanotechnology
seems
promising
terms
preparation
variety
uses.
Applied Sciences,
Journal Year:
2025,
Volume and Issue:
15(4), P. 1712 - 1712
Published: Feb. 7, 2025
Thirty-two
ambient
cured
alkali-activated
engineered
composites
(AAECs)
were
developed
by
incorporating
MgO,
multi-walled
carbon
nanotubes
(MWCNTs),
reduced
graphene
oxide
(rGO),
and
polyvinyl
alcohol
(PVA)
fiber
with
a
one-part
dry
mix
technique
using
powder-based
activators/reagents.
The
effects
of
material
variables,
namely
binary
or
ternary
combination
source
materials
(fly
ash
C
F
ground
granulated
blast
furnace
slag
‘GGBFS’),
two
types
reagents
varying
chemical
ratios
dosages
additives
(from
0
to
5%
MgO
from
6%
MWCNT/rGO),
on
the
physical
(slump
flow,
flow
time,
velocity,
density),
hardness
(compressive
strength
180
days
28-day
ultrasonic
pulse
velocity
‘UPV’),
micro-structural
(SEM/EDS,
XRD
FTIR)
properties
evaluated.
All
these
individually
combined,
influenced
microstructural
aspects
AAECs.
Problems
associated
dispersion
agglomeration
nanomaterials,
which
could
disrupt
microstructure
weaken
its
mechanical/physical
properties,
avoided
through
use
defined
ultra-sonication
high-shear
mixing
protocol.
AAECs
achieved
compressive
ranging
26.0
MPa
48.5
slump
>
800
mm,
satisfying
criteria
for
flowable
structural
concrete.
addition
up
0.3%
MWCNT/rGO
increased
strength/UPV
MgO-MWCNT
rGO
provided
an
improved
at
higher
dosage
0.6%.
A
linear
correlation
between
UPV
was
derived.
As
per
SEM/EDS
analyses,
besides
common
C-A-S-H/N-C-A-S-H
C-A-S-H/C-S-H
gels,
led
formation
magnesium-aluminum
hydrotalcite
(Ht)
M-S-H
(demonstrating
self-healing
potential),
while
incorporation
produced
zeolites
densified
matrix
Fourier
transform
infrared
spectrometer
(FTIR)
analysis
also
suggested
aluminosilicate
network
in
AAECs,
indicating
more
stable
structure.
MWCNT/rGO-incorporated
indicated
their
better
conductivity
ability
self-sensing.
carbon-nano
additive,
have
satisfactory
self-healing/-sensing
potentials.
Buildings,
Journal Year:
2023,
Volume and Issue:
13(12), P. 2948 - 2948
Published: Nov. 26, 2023
The
main
motivations
for
the
development
of
research
in
area
appropriate
additives
asphalt
and
bitumen
are
enhancement
their
properties
improvement
production
process,
including
reduction
environmental
burden.
Many
improve
mineral–asphalt
mixtures.
Traditionally,
such
as
following
applied:
elastomers,
plastomers,
latexes,
rubber
powder,
resins,
others.
Currently,
modification
materials
by
traditional
can
be
replaced
nanomaterials
that
better
fit
requirements
modern
industry.
New
solutions
required,
which
has
led
to
years
studies
researching
micro-
nano-additives.
aim
article
is
analyze
contemporary
where
nano-additives
were
applied
summarize
advantages
disadvantages
implementation
these
road
construction.
studied
state
art
this
based
on
literature
research.
It
presents
possible
materials’
solutions,
properties,
used
technology,
featured
trends
challenges
further
projects
discussed,
especially
issues.
Ceramics,
Journal Year:
2023,
Volume and Issue:
6(3), P. 1749 - 1764
Published: Aug. 11, 2023
The
article
summarizes
the
state
of
art
in
increasing
antimicrobial
activity
and
hydrophobic
properties
geopolymer
materials.
Geopolymers
are
inorganic
polymers
formed
by
polycondensation
aluminosilicate
precursors
an
alkaline
environment
considered
a
viable
alternative
to
ordinary
Portland
cement-based
materials,
due
their
improved
mechanical
properties,
resistance
chemicals,
high
temperature,
lower
carbon
footprint.
Like
concrete,
they
susceptible
microbially
induced
deterioration
(corrosion),
especially
humid
environment,
primarily
surface
colonization
sulphur-oxidizing
bacteria.
This
paper
reviews
various
methods
for
or
protection
method
critical
analysis
literature
results
discussed,
along
with
potential
applications
geopolymers
properties.
Metal
nanoparticles,
despite
risks,
PDMS
epoxy
coatings,
most
investigated
effective
materials
protection.
Additionally,
future
prospects,
challenges
research
against
degradation
presented
discussed.
