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.
Cement and Concrete Composites,
Journal Year:
2023,
Volume and Issue:
143, P. 105262 - 105262
Published: Aug. 19, 2023
In
this
study,
lithium
slag
was
utilised
as
a
supplementary
cementitious
material
(SCM)
to
develop
pozzolanic
activity
and
reduce
CO2
emissions
related
cement
production,
with
focus
on
comprehensive
chemical
tests
microstructural
assessments.
Lithium
primarily
characterised
through
laser
particle
size
analyser,
X-ray
fluorescence,
diffraction,
scanning
transmission
electron
microscopy
coupled
energy
dispersive
spectroscopy,
thermogravimetry.
These
indicate
that
holds
31.6%
amorphous
phase
rich
aluminosilicate
minerals,
making
it
an
excellent
candidate
pozzolan.
The
unsaturated
lime
electrical
conductivity
precursor
evaluated
the
potentiality
of
using
low
carbon
optimum
percentage
determined
from
Frattini,
strength
index,
R3
by
replacing
0–60%
cement.
Results
show
40%
mortar
could
achieve
93%
index
in
28
days.
microstructure
development
assessed
ettringite,
monocarboaluminate,
intermixed
calcium
hydrates
were
formed
at
56
Journal of Building Engineering,
Journal Year:
2024,
Volume and Issue:
84, P. 108501 - 108501
Published: Jan. 10, 2024
Traditional
building
materials
such
as
cement
products
release
a
large
amount
of
carbon
dioxide
during
their
preparation
and
usage,
which
has
negative
impact
on
the
environment.
On
other
hand,
3D
printing
with
geopolymer
adopts
renewable
low-carbon
emission
raw
materials.
It
also
possesses
characteristics
energy
efficiency
resource-efficient
utilization,
help
to
reduce
emissions
improve
sustainability.
Therefore,
development
them
is
great
significance.
This
paper
comprehensively
reviews
systems,
processability,
including
flowability
thixotropy,
microstructure.
The
conducts
in-depth
research
sustainability
environmental
impact.
evaluation
shows
that
initial
content
silicon,
aluminium,
calcium
in
silicate
material
plays
an
important
role
gel
structure
microstructural
geopolymer.
Aluminium
can
promote
reaction
rate,
increase
degree,
product
formation.
Silicon
helps
strength
enhance
its
mechanical
properties.
Calcium
facilitates
formation
stability
three-dimensional
network
structure,
further
improving
stability.
Furthermore,
reactivity
key
factor
affecting
interlayer
bonding
interface
Finally,
considering
sustainability,
selection
crucial
reducing
emissions,
consumption,
costs.
Compared
cement,
lower
costs,
thus
considered
sustainable
material.
Environmental Quality Management,
Journal Year:
2025,
Volume and Issue:
34(3)
Published: Feb. 3, 2025
ABSTRACT
Geopolymers
are
an
innovative
class
of
environmentally
friendly
materials
gaining
significant
attention
in
construction,
science,
and
sustainable
technology.
As
alternatives
to
traditional
cement‐based
materials,
geopolymers
exhibit
unique
mechanical
properties
suitable
for
various
construction
applications,
including
use
as
coating
high‐temperature‐resistant
materials.
Notably,
can
effectively
adsorb
heavy
metals,
dyes,
radioactive
pollutants,
offering
substantial
environmental
benefits.
This
review
paper
explores
the
process
mechanism
geopolymerization,
well
application
treatment
contaminants.
It
details
how
aluminosilicate
precursors
contribute
photocatalytic
degradation
examining
role
different
raw
material
sources,
types
activators
or
additives
used,
preparation
methods.
highlights
effectiveness
dye
degradation,
providing
insights
into
underlying
mechanisms.
Additionally,
delves
interaction
with
metals
through
mechanisms
such
chemisorption,
complexation,
adsorption,
ion
exchange,
intraparticle
diffusion,
solidification
within
geopolymer
matrix.
comprehensive
analysis
existing
research
aids
researchers
understanding
capabilities
limitations
remediation.
Beyond
waste
reduction,
addresses
broader
impact
geopolymers,
particularly
their
potential
reducing
carbon
footprint
compared
cement.
aspect
is
crucial
evaluating
overall
sustainability
geopolymers.
Furthermore,
emphasizes
importance
life
cycle
durability
assessments
(LCA)
evaluate
ecological
this
eco‐friendly
concrete
throughout
its
lifetime,
from
end‐of‐life
disposal.
LCA
provides
a
complete
perspective
on
guiding
future
applications
construction.
By
synthesizing
current
serves
valuable
resource
technology,
directions
applications.
Cement and Concrete Composites,
Journal Year:
2024,
Volume and Issue:
148, P. 105469 - 105469
Published: Feb. 2, 2024
Lithium
slag
(LS)
is
a
by-product
of
the
lithium
salt
purification
process,
and
this
can
be
used
as
partial
replacement
cement
for
production
green
concrete
by
reducing
carbon
footprint
associated
with
clinker
production.
The
raw-LS
rich
in
aluminosilicate,
containing
77.2
%
SiO2+Al2O3+Fe2O3,
31.6
amorphous
phases,
loss
ignition
7.8
at
750
°C,
making
it
suitable
pozzolan
providing
4.8
times
higher
ion
dissolution
capacity
1
day
compared
to
class
F
fly
ash
(FA).
In
study,
fresh
properties,
mechanical,
microstructural
properties
0–60
replaced
LS
concretes
were
thoroughly
determined
total
binder
content
400
kg/m3
water-binder
ratio
0.435,
same
mix
proportion
FA
concrete.
results
show
that
20–60
mixes
produced
normal
density
within
design
slump
125
±
25
mm
air
2
0.5
%.
At
90
days,
average
compressive
strength,
tensile
elastic
modulus
40
58.6
MPa,
4.10
39
GPa,
respectively,
which
are
35.5
3.0
31.1
revealing
offers
better
mechanical
strength.
However,
strengths
decreased
significantly
beyond
incorporation.
experimentally
28
days
underestimated
ACI
318
AS
3600
standard
equations.
BSE-EDS
on
ITZ
fine
coarse
aggregate
confirmed
consistent
development
intermediate
hydration
products
mixes.
