Case Studies in Construction Materials,
Journal Year:
2024,
Volume and Issue:
21, P. e03608 - e03608
Published: Aug. 6, 2024
A
cost-effective
approach
is
urgently
needed
to
utilize
molybdenum
tailings
(MoT),
a
mining
byproduct
with
rising
output.
This
study
explored
the
preparation
of
collaborative
fly
ash
(FA)
geopolymers
(MFG)
from
mechanically
activated
MoT
and
FA
raw
materials.
Orthogonal
experiments
investigated
impacts
various
parameters
on
compressive
strengths
MFG.
The
macroscopic
properties
MFG
different
mixture
ratios
were
evaluated.
microstructures
components
characterized
using
methods.
Fractal
dimensions
(Ds)
pore
structures
in
samples
determined.
Carbon
emissions
resulting
production
calculated
evaluated
Low
carbon
Assessment.
findings
showed
that
increasing
content
system
decreased
flowabilities
prolonged
setting
times.
optimal
MoT-to-FA
ratio
for
achieving
highest
strength
31.26
MPa
was
1:4,
Si/Al
2.03
system.
XRD,
TG,
SEM-EDS,
FTIR
analyses
confirmed
primary
product
glassy
hydrated
sodium-aluminum
silicate
(N-A-S-H)
gel.
MIP
analysis
revealed
addition
improved
structure
MFG,
leading
smaller
pores.
Additionally,
composed
solely
or
FA,
Ds
smaller,
particles
materials
also
led
values.
Conversely,
when
mixed,
larger
values
observed,
closer
volume
fraction
two
resulted
Furthermore,
emission
reduced
by
45.4
%-64.3
%
compared
traditional
OPC
slurries.
Case Studies in Construction Materials,
Journal Year:
2023,
Volume and Issue:
20, P. e02822 - e02822
Published: Dec. 22, 2023
This
comprehensive
review
paper
evaluates
lithium
slag
(LS)
as
a
promising
precursor
for
geopolymer
concrete,
focusing
on
its
workability,
strength,
durability,
and
microstructure.
In
the
context
of
sustainable
construction,
LS
emerges
vital
alternative
to
conventional
cementitious
materials,
primarily
due
environmental
concerns
associated
with
cement
production,
such
substantial
greenhouse
gas
emissions
air
pollution.
Geopolymer
technology
utilizes
alkali
activators
aluminosilicate-rich
offers
reduced
footprint
shows
comparable
performance
traditional
cement-based
concrete.
particular,
has
gained
attention
potential
an
aluminosilicate
material
in
investigated
recent
advancements
LS-based
geopolymers,
exploring
various
processing
techniques
like
mechanical
activation,
calcination,
chemical
treatment
optimize
geopolymerisation
enhance
early
strength
development.
The
incorporation
binary/ternary
is
also
discussed,
aiming
improve
crucial
properties
needs
research
into
geopolymers
achieve
their
full
promoting
environmentally
friendly
approach
contribution
circular
economy
construction
industry
are
highlighted.
