Journal of Sustainable Cement-Based Materials,
Journal Year:
2023,
Volume and Issue:
13(3), P. 436 - 449
Published: Nov. 14, 2023
The
large
drying
shrinkage
is
one
of
the
most
serious
factors
limiting
practical
application
alkali-activated
slag
concrete
(AASC).
In
this
study,
based
on
successful
reduction
waste
cooking
oil
for
paste
(AASP),
influence
stearic
acid
(saturated
fatty
acids)
and
oleic
(unsaturated
fresh
properties
(setting
time
fluidity),
physical
characteristics
(density
water
absorption),
mechanical
strengths
(flexural
strength
compressive
strength),
durability
(drying
shrinkage,
self-shrinkage,
carbonation
resistance)
are
systematically
compared.
experimental
results
reveal
that
admixing
can
effectively
inhibit
self-shrinkage
AASP.
Specifically,
adding
1
wt%
(oleic
acid)
reduce
AASP
by
20%
(25%)
32%
(55%),
respectively.
Remarkably,
combined
usage
two
additives
maximize
performance
AASP,
such
as
obtaining
satisfactory
strengths,
extending
initial
setting
time,
improving
resistance.
developed
be
regarded
a
low-cost
environmentally-friendly
product,
which
promote
applications
AASC.
Advances in Civil Engineering,
Journal Year:
2025,
Volume and Issue:
2025(1)
Published: Jan. 1, 2025
Due
to
the
growing
infrastructure
and
demand
for
environmentally
friendly
environments,
use
of
concrete
as
a
construction
material
is
gradually
rising.
Since
second‐most
utilized
after
water,
it
necessary
employ
alternative,
sustainable
materials,
particularly
those
derived
from
waste.
Rice
husk
ash
(RHA)
an
agro‐waste
rice
milling
industry
that
produces
more
than
20
million
tons
per
year
worldwide.
A
significant
amount
RHA
discarded
waste
material,
resulting
in
substantial
pollution.
The
pozzolanic
properties
make
suitable
building
industry,
providing
alternate
solution
its
disposal.
utilization
binder
production
geopolymer
or
mortar
considered
effective
way
prevent
this
issue.
In
review,
production,
properties,
geopolymers
are
comprehensively
systematically
studied.
Moreover,
chemical,
physical,
microstructure
various
were
critically
evaluated,
their
influence
on
fresh
hardening
characteristics
presented.
Numerous
research
investigations
have
documented
advantageous
impact
mechanical,
durability,
microstructural
geopolymers,
when
at
optimal
dosage.
general,
analysis
will
give
researchers
industrial
sector
important
information
about
creation,
recycling,
creation
possible
applications.
study’s
findings
indicate
shows
potential
enhancing
mechanical
characteristics,
microstructure,
sustainability
geopolymers.
Furthermore,
has
act
cobinder
by
up
10%–20%
without
compromising
geopolymers’
performance
due
high
addition
achieve
35–45
MPa
alone.
Advances in Civil Engineering,
Journal Year:
2025,
Volume and Issue:
2025(1)
Published: Jan. 1, 2025
This
study
explores
the
substitution
of
cement
with
rice
husk
ash
in
concrete,
aiming
to
reduce
pollution
and
energy
consumption
caused
by
production.
Through
a
series
experiments,
including
slump
test,
water
absorption
compressive
strength
dynamic
compression
effects
calcination
temperature
average
particle
size
on
concrete
performance
were
evaluated.
The
findings
indicate
that
use
lowers
while
increasing
concrete’s
capacity.
With
higher
temperatures,
both
strengths
initially
improve,
followed
decline.
Smaller
particles
lead
better
these
tests.
ideal
parameters
identified
650°C
5
µm.
A
machine
learning
approach,
utilizing
eXtreme
Gradient
Boosting
(XGB)
model,
was
employed
predict
strength,
predictions
cross‐referenced
experimental
data.
Shapley
analysis
applied
assess
influence
individual
variables
outcomes.
Results
confirmed
accuracy
XGB
an
R
2
value
0.9435
mean
absolute
error
(MAE)
2.29
MPa,
showing
more
significant
impact
than
temperature.
Buildings,
Journal Year:
2024,
Volume and Issue:
14(11), P. 3355 - 3355
Published: Oct. 23, 2024
The
durability
of
geopolymer
concrete
containing
Ground
Granulated
Blast
Furnace
Slag
(GGBS)
and
Rice
Husk
Ash
(RHA),
along
with
Lightweight
Expanded
Clay
Aggregate
(LECA),
was
investigated.
Six
different
LWGPC
mixtures
were
made
NaOH
molarities
8,
10,
12M.
For
each
molarity,
two
combinations
source
materials
selected:
100%
GGBS
(G)
80%
20%
RHA
(RG).
In
all
the
mixtures,
coarse
aggregate
substituted
35%
LECA.
exposed
to
3%
HCl,
5%
MgSO4,
3.5%
NaCl
for
studying
properties.
test
results
demonstrate
that
12M
(12G)
outperformed
other
mixtures.
residual
compressive
strength
12G
mix
specimens
after
six
months
exposure
found
be
86.4%
in
an
acid
environment,
90.6%
a
sulfate
91.4%
salt
environment.
elemental
composition
analyzed
using
EDAX
reveals
silica,
alumina,
calcium,
sodium
are
predominant
elements
form
dense
microstructure
N-A-S-H,
C-A-S-H,
C-S-H.
Further,
inner
properties
chemicals
examined
MATLAB
R2023b
ImageJ
1.54f
based
on
SEM
images.
image
showed
porosity
ranged
from
0.5194
0.6748
µm,
signifying
enhanced
performance.
experimental
microstructural
analysis
show
incorporating
LECA
offers
superior
performance,
making
it
promising
solution
sustainable
durable
construction.
