Materials & Design,
Journal Year:
2023,
Volume and Issue:
234, P. 112320 - 112320
Published: Sept. 12, 2023
Accurately
quantifying
the
proportions
and
distributions
of
reaction
products
is
crucial
for
interpreting
mechanisms
microstructure
evolution
in
alkaline
activated
fly
ash/slag
paste.
However,
existing
techniques
are
limited
their
ability
to
provide
a
comprehensive
visual
analysis.
This
paper
presents
versatile
energy
dispersive
X-ray
spectroscopy
(EDS)
image
analysis
that
enables
enhancement,
phase
extraction,
component
classification
alkaline-activated
materials
(AAMs)
-irrespective
nature
quality
element
mappings.
The
proposed
methodology
effectively
removes
detection
noise
inherently
existed
EDS
images,
subsequently
reinforcing
accuracy
clustering
extraction
procedure
allows
obtaining
proportion
pores,
products,
unreacted
solid
precursors
(SPs).
Moreover,
further
categorization
SPs.
By
analyzing
ratios
shortest
distances,
chemical
compositions
spatial
various
could
be
revealed.
Through
application
different
schemes,
consistent
tendency
was
obtained,
validating
practicability
reliability
this
methodology.
Journal of Sustainable Cement-Based Materials,
Journal Year:
2024,
Volume and Issue:
14(2), P. 265 - 277
Published: Dec. 2, 2024
Alkali-activated
slag
concrete
(AASC)
with
odium
silicate-bonded
sand
(WSSS)
is
a
potential
solution
to
mitigate
the
environmental
impact
of
traditional
cement.
However,
its
feasibility
for
structural
applications
has
remained
uncertain.
This
study
examined
WSSS
substitute
fine
aggregate
in
AASC
compared
natural
aggregates
and
Quartz
sand.
The
exceeded
compressive
strength
suggested
practical
purposes.
alkali
activator
concentration
influenced
concrete.
optimal
5%
6%
increased
strength.
In
addition,
type
significantly
affected
strength,
performance,
erosion
rate
alkali-activated
mortar
presence
strong
was
remarkable
highlighted
as
low-cost,
durable
alternative
AASC.
offers
promising
more
environmentally
friendly
construction
materials.
International Journal of Mining Reclamation and Environment,
Journal Year:
2023,
Volume and Issue:
37(10), P. 769 - 779
Published: Sept. 21, 2023
ABSTRACTBinder
is
the
main
cost
burden
in
cemented
paste
backfill
(CPB)
and
an
obstacle
towards
fully
green
mining
technologies.
In
this
work,
improved,
low-cost,
efficient,
binder
with
steel
slag
content
up
to
50
wt%
was
presented
for
mine
backfill.
The
hydration
CPB
hardening
properties
were
experimentally
investigated.
Results
show
that
SS
(50
slag,
35
blast
furnace
15
desulphurisation
gypsum)
has
highest
28-day
strength
of
2.21
MPa,
which
2
times
higher
than
Portland
control
(0.98MPa).
less
heat
a
slower
longer
deceleration
stage
duration.
products
are
mainly
ettringite
amorphous
gel.
substantial
gel-like
obtained
from
multiple
activation
processes
mystery
outstanding
strength.
process
can
be
divided
into
fast
hydrating
stage,
compacting
potential
refining
stage.
findings
help
better
understand
improve
solid
waste
valorisation
sustainable
development
mining,
mineral
processing,
iron
making
industries.KEYWORDS:
Cemented
backfillsteel-slag
binderhydration
propertieshardening
propertiesgreen
technology
AcknowledgmentsThe
authors
thank
National
Key
Research
Development
Program
China
[grant
number
2022YFC300461],
Natural
Science
Foundation
52130404]
their
financial
support.Disclosure
statementNo
conflict
interest
reported
by
author(s).Additional
informationFundingThis
work
supported
[2022YFC300461];
[52130404].
