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.
Buildings,
Journal Year:
2024,
Volume and Issue:
14(6), P. 1879 - 1879
Published: June 20, 2024
Chloride
corrosion
is
a
key
factor
affecting
the
life
of
marine
concrete,
and
surface
chloride
concentration
main
parameter
for
analyzing
its
durability.
In
this
paper,
we
first
introduce
six
erosion
mechanism
models
ion
concentration,
reveal
convection
effect
in
diffusion
behavior
ions,
then
mechanisms
that
occur
different
exposure
environments.
On
basis,
analysis
carried
out
using
empirical
formulations
machine
learning
methods,
which
provides
clearer
understanding
research
characteristics
differences
between
formulas
emerging
techniques.
This
paper
summarizes
time-varying
model
multifactor
coupling
on
basis
analysis.
It
found
exponential
function
reciprocal
are
more
consistent
with
distribution
law
containing
most
effective,
Chen
reliable.
Machine
learning,
as
an
method,
has
been
widely
used
concrete
durability
research.
can
make
up
shortcomings
formula
method
solve
problem
strong
prediction
ability.
addition,
difficulty
data
acquisition
also
major
restricts
development
incorporating
maintenance
conditions
into
future
direction.
Through
study,
researchers
systematically
understand
methods
their
respective
choose
appropriate
techniques
to
explore
structures.
Moreover,
intelligent
computing
will
certainly
occupy
increasingly
important
position
Construction Materials,
Journal Year:
2025,
Volume and Issue:
5(1), P. 5 - 5
Published: Jan. 22, 2025
Alkali-activated
materials
are
promising
alternatives
to
cement.
This
study
investigated
the
effects
of
silica
content,
particle
size,
and
replacement
ratio
rice
husk
ash
(RHA)
on
compressive
strength
optimization
these
parameters.
Seventeen
mixtures
with
different
were
tested
evaluate
their
strengths.
Three
levels
RHA
used.
The
characteristics
based
Archimedes
porosity,
pH,
ignition
loss,
X-ray
diffraction.
experimental
results
reveal
that
was
p-values
<
0.002,
which
affected
compared
size
(p-values
0.450)
content
0.017).
It
confirmed
optimum
values
50
µm,
90%,
15
wt.%,
respectively.
After
re-testing,
mortar
made
49.8
MPa.
increase
in
also
found
be
closely
related
loss
paste.
increased
decreasing
porosity
pH
increasing
formation
calcite
C-S-H.
Materials,
Journal Year:
2024,
Volume and Issue:
17(12), P. 3001 - 3001
Published: June 19, 2024
The
effect
of
an
alternative
source
silica,
based
on
class
F
fly
ash
mixed
with
blast
furnace
slag
and
activated
by
rice
husk
(RHA),
to
produce
concrete
exposed
marine
environments
was
evaluated.
Four
mixtures
the
combination
85%
NaOH
14M
+
15%
RHA
were
manufactured
achieve
a
liquid/solid
ratio
0.20.
Fly
incorporated
into
steel
mixture
at
addition
percentages
20,
40,
60,
80%,
evaluated
28,
900,
1800
days
for
pore
chloride
ion
absorption.
In
general,
including
in
significantly
affected
mechanical
performance
because
it
possible
obtain
high
resistance.
Concerning
durability
evaluation,
activator
generated
observed,
increase
added
cementitious
samples
improved
capacity
material
resist
penetration
diffusion
ions.
Case Studies in Construction Materials,
Journal Year:
2023,
Volume and Issue:
19, P. e02574 - e02574
Published: Oct. 13, 2023
To
overcome
the
slow
development
of
mechanical
strengths
sulphoaluminate
cement
(CSA)
in
winter
construction,
this
paper
investigates
effects
different
amounts
admixing
Li2CO3
on
setting
time,
compressive
strength,
and
cooling
curve
CSA
paste
negative
temperatures
(-5
°C,
-10
-20
°C).
The
influence
hydration
process
microstructure
a
temperature
environment
is
also
studied
using
X-ray
diffraction
(XRD)-Rietveld
quantitative
analysis,
Thermogravimetry
(TG)
Scanning
electron
microscopy
(SEM)
observation.
results
show
that
adding
into
can
significantly
improve
properties
at
an
early
age,
shorten
curing
reduce
freezing
point
under
temperatures.
XRD-Rietveld
TG
analysis
indicates
increase
consumption
C4A3S̅
promote
generation
AFt
It
recommended
optimum
dosage
should
be
0.16
wt.
%
when
used
as
admixture
for
systems
