Journal of Structural Fire Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 19, 2025
Purpose
This
study
aims
to
explore
the
potential
of
alkali-activated
concrete
(AAC)
as
a
sustainable
alternative
ordinary
Portland
cement
(OPC),
addressing
critical
need
reduce
carbon
dioxide
(CO2)
emissions
associated
with
production.
By
incorporating
nanomaterials
(NMs),
such
nano-fly
ash
(nFA),
nano-ground
granulated
blast
furnace
slag
(nGS)
and
nano-bentonite
(nBT),
research
highlights
enhanced
mechanical
properties,
durability
sustainability
nano-engineered
AAC.
Design/methodology/approach
examines
influence
various
NMs,
including
nFA,
nGS
nBT,
on
impact
resistance
nano
(AANC)
when
subjected
elevated
temperatures
ranging
from
200
°C
800
°C.
The
results
reveal
notable
changes
in
energy,
weight
loss,
crack
patterns,
spalling
behavior
capillary
water
absorption.
Microstructural
were
examined
using
scanning
electron
microscopy
(SEM),
predictive
models
for
energy
residual
developed
validated.
Findings
addition
NMs
significantly
influenced
workability,
compressive
strength
(CS)
rebound
number
concrete.
ranged
37.25
60.37
MPa
at
28
days,
cracking
failure
numbers
observed
NM-incorporated
specimens.
At
°C,
specimens
demonstrated
increased
dissipation
altered
absorption
rates,
particularly
nBT-added
samples.
SEM
analysis
revealed
microstructural
modifications,
formation
microcracks
phase
decomposition.
Predictive
showed
strong
correlation
experimental
data,
R2
values
between
0.91
0.95.
Originality/value
underscores
NM-enhanced
AANC
improve
thermal
stability,
offering
promising
solution
construction.
findings
contribute
reducing
environmental
footprint
production
while
maintaining
high-performance
standards,
emphasizing
role
nanotechnology
advancing
green
construction
practices.
Materials,
Год журнала:
2025,
Номер
18(8), С. 1774 - 1774
Опубликована: Апрель 13, 2025
The
sustainable
development
of
building
materials
is
based
on
reusing
by-products
to
reduce
environmental
impact
and
promote
alternatives
traditional
materials.
In
this
study,
geopolymers
were
developed
from
the
mining,
ceramic,
thermal
industries:
slate
stone
cutting
sludge
(SSCS)
chamotte
(CH)
as
aluminosilicate
sources,
olive
bottom
ash
(OSBA)
an
alkaline
activator,
combined
with
sodium
silicate
(Na2SiO3).
Eight
geopolymer
families
prepared
constant
amounts
SSCS
CH
varying
proportions
OSBA/Na2SiO3
(0.88–1.31).
evaluation
phase
included
physical,
chemical,
mechanical,
microstructural
tests.
results
showed
that
optimum
formulation
(GP
E)
contained
25%
SSCS,
15%
CH,
19%
OSBA
a
Na2SiO3/OSBA
ratio
1.0,
achieving
compressive
strength
24.12
MPa
after
28
days
curing.
GP
E
also
lowest
porosity
(19.54%),
minimal
water
absorption
(6.86%),
favorable
conductivity
(0.688
W/mK).
Fourier
transform
infrared
spectroscopy
(FTIR)
scanning
electron
microscopy
(SEM)
confirmed
formation
dense
homogeneous
matrices.
These
demonstrate
feasibility
manufacturing
using
substitutes
for
binders,
promoting
practices,
industrial
by-products,
reducing
carbon
emissions
in
construction.
Journal of Structural Fire Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 19, 2025
Purpose
This
study
aims
to
explore
the
potential
of
alkali-activated
concrete
(AAC)
as
a
sustainable
alternative
ordinary
Portland
cement
(OPC),
addressing
critical
need
reduce
carbon
dioxide
(CO2)
emissions
associated
with
production.
By
incorporating
nanomaterials
(NMs),
such
nano-fly
ash
(nFA),
nano-ground
granulated
blast
furnace
slag
(nGS)
and
nano-bentonite
(nBT),
research
highlights
enhanced
mechanical
properties,
durability
sustainability
nano-engineered
AAC.
Design/methodology/approach
examines
influence
various
NMs,
including
nFA,
nGS
nBT,
on
impact
resistance
nano
(AANC)
when
subjected
elevated
temperatures
ranging
from
200
°C
800
°C.
The
results
reveal
notable
changes
in
energy,
weight
loss,
crack
patterns,
spalling
behavior
capillary
water
absorption.
Microstructural
were
examined
using
scanning
electron
microscopy
(SEM),
predictive
models
for
energy
residual
developed
validated.
Findings
addition
NMs
significantly
influenced
workability,
compressive
strength
(CS)
rebound
number
concrete.
ranged
37.25
60.37
MPa
at
28
days,
cracking
failure
numbers
observed
NM-incorporated
specimens.
At
°C,
specimens
demonstrated
increased
dissipation
altered
absorption
rates,
particularly
nBT-added
samples.
SEM
analysis
revealed
microstructural
modifications,
formation
microcracks
phase
decomposition.
Predictive
showed
strong
correlation
experimental
data,
R2
values
between
0.91
0.95.
Originality/value
underscores
NM-enhanced
AANC
improve
thermal
stability,
offering
promising
solution
construction.
findings
contribute
reducing
environmental
footprint
production
while
maintaining
high-performance
standards,
emphasizing
role
nanotechnology
advancing
green
construction
practices.
