Advances in Civil Engineering,
Год журнала:
2024,
Номер
2024(1)
Опубликована: Янв. 1, 2024
High‐magnesium
nickel
slag
(HMNS)
is
a
type
of
metallurgical
waste
that
has
the
potential
for
cementitious
activity,
and
its
high
content
olivine
minerals
also
makes
it
CO
2
sequestration.
We
prepared
HMNS‐based
backfill
materials
(HMNS‐CBMs)
using
mechanical
activation
chemical
methods.
Furthermore,
we
explored
sequestration
efficiency
under
accelerated
carbonation
conditions.
The
hydration
products
test
blocks
were
analyzed
by
thermogravimetric‐differential
scanning
calorimeter
X‐ray
diffraction.
Additionally,
microstructure
was
mercury
intrusion
porosimetry
backscattered
electron
microscopy.
Results
showed
conditions
at
80°C
72
h,
HMNS‐CBM
had
adsorption
(CAC)
6.62
wt.%
after
28‐day
water
curing
period.
Moreover,
same
conditions,
compressive
strength
treated
with
citric
acid
reached
49.35
MPa,
which
highest
among
all
studied
samples.
addition
facilitated
during
early
period
enhanced
development
later
Energies,
Год журнала:
2024,
Номер
17(11), С. 2672 - 2672
Опубликована: Май 31, 2024
The
increasing
concentration
of
CO2
in
the
atmosphere
is
a
major
factor
contributing
to
climate
change.
storage
coal
goaf
convenient,
effective,
and
economical
solution.
Methods
quickly
effectively
evaluate
geological
conditions
are
urgently
required.
main
influencing
factors
safety,
potential,
economics,
environmental
protection;
these
include
4
aspects,
38
indexes,
index
levels
that
can
be
quantified
using
classification
levels.
We
established
evaluation
model,
analytic
hierarchy
process
(AHP)
weighted
interval
methods.
AHP
was
used
determine
its
elements,
indicators,
inter-layer
relationships,
as
well
clarify
structural
relationships.
weight
method
unstable
reducing
their
difficulty,
constant
values
assign
weights
stable
elements
increase
accuracy.
This
model
applied
assess
suitability
Yaojie
mine
for
storage.
results
revealed
this
an
above
average
space,
which
consistent
with
previous
research.
may
also
other
goafs.
