Resources Conservation & Recycling Advances,
Journal Year:
2024,
Volume and Issue:
22, P. 200216 - 200216
Published: April 12, 2024
The
imperative
to
mitigate
carbon
emissions
and
seek
sustainable
alternatives
cementitious
materials
has
driven
the
advancement
of
geopolymer
binders,
which
are
inorganic
binders
aluminosilicate
industrial-waste
activated
by
alkaline
agents.
use
geopolymers
carries
potential
for
significant
reductions
in
greenhouse
gas
emission.
Furthermore,
incorporation
plastic
waste
as
aggregates
addresses
not
only
resource
conservation
but
also
environmental
sustainability.
This
study
conducted
a
comprehensive
life-cycle
assessment
from
fly
ash
precursor
with
polyethylene
terephthalate
(PET)
substitute
natural
aggregates.
It
was
observed
that
when
replacing
PET
maximum
extent,
global
warming
(GWP)
category
related
aggregate
preparation
increased
16.7
%.
increase
attributed
generated
during
processing,
including
activities
such
washing
grinding.
total
GWP
produce
one
cubic
meter
mixture
643.55
kgCO2-e
without
667.86
optimization
energy-intensive
processes
led
remarkable
reduction
19.63
%
production
These
findings
show
improved
sustainability
mixtures
emphasize
critical
role
optimizing
mitigating
their
impact.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(1), P. 440 - 440
Published: Jan. 4, 2024
This
study
aims
to
investigate
the
preparation
of
zeolite-based
geopolymer
composites
incorporating
blast
furnace
slag
at
various
temperatures
and
varying
amounts
as
potential
sustainable
building
construction
materials.
The
primary
objectives
were
use
mining
waste
streams
for
production
assess
mechanical
behavior
these
hybrid
geopolymers,
along
with
performing
a
life
cycle
assessment
(LCA)
compare
their
environmental
impact
conventional
concrete.
It
was
observed
that
geopolymers
attained
maximum
strength
40
MPa.
Remarkably,
substituting
just
20%
material
resulted
in
92%
improvement
compressive
strength.
To
impacts,
cradle-to-gate
LCA
performed
on
different
mix
designs,
focusing
particularly
global
warming
(GWP).
results
indicated
concrete
generated
240
kg
CO2-e/m3,
which
40%
lower
than
emissions
from
ordinary
cement,
highlighting
advantages
Further,
X-ray
diffraction
used
determine
mineral
composition
both
raw
developed
composites.
Solid-state
nuclear
magnetic
resonance
(NMR)
applied
molecular
structure
changes
upon
slag.
initial
setting
time
shrinkage
also
investigated.
Morphological
characteristics
analyzed
by
scanning
electron
microscopy
(SEM).
Thermal
analyses
confirmed
stability
up
800
°C.
Geopolymer
high
thermal
can
be
materials
require
fire
resistance.
not
only
enhances
understanding
composite
properties
but
confirms
substantial
utilizing
geopolymerization
construction.
Cleaner Materials,
Journal Year:
2024,
Volume and Issue:
12, P. 100242 - 100242
Published: March 26, 2024
This
work
examines
the
environmental
impact
of
low-carbon
concrete
that
incorporates
supplementary
cementitious
materials
(SCMs).
After
reviewing
near-zero
carbon
SCMs
and
concrete,
a
life
cycle
assessment
(LCA)
was
undertaken
for
mix
designs
with
normal-to-high
compressive
strengths,
incorporating
limestone
fly
ash
as
cement
replacements.
The
analysis
includes
relevant
region-specific
inventory
parameters
raw
materials,
energy
production,
transportation.
A
comparative
between
embodied
emissions
material
mechanical
performance
is
then
made.
results
this
paper
indicate
in
can
reduce
emissions,
yet
at
proportional
decrease
properties
compared
to
conventional
concrete.
combination
produced,
on
average,
higher
strength
by
20.5%
lower
CO2-eq
values
21.1%
when
blends.
associated
transportation
main
constituents
production
were
average
below
4%
total
per
mix.
In
addition
eco-mechanical
quantitative
assessments,
study
offers
insights
recommendations
development
considering
global
resource
availability
constituents.
Processes,
Journal Year:
2025,
Volume and Issue:
13(2), P. 331 - 331
Published: Jan. 24, 2025
Replacing
conventional
materials
with
new
recycled
is
one
of
the
goals
sustainable
development,
as
it
promotes
creation
environmentally
friendly
products
while
reducing
amount
waste
to
be
treated.
A
common
recyclable
stream
associated
urban
living
glass,
which
typically
comes
from
packaging
or
product
containers.
Although
most
this
can
reused
and/or
recycled,
worth
exploring
alternative
uses,
especially
for
areas
high
fluctuations
in
glass
production.
An
example
would
sudden
increase
tourist
during
season.
To
end,
present
work
presents
results
life
cycle
assessment
geopolymerization
production
cement
tiles.
The
methodology
includes
estimation
mass
and
energy
balances
by
dividing
whole
process
into
several
sub-processes
(NaOH
addition,
consumption,
etc.).
NaOH
addition
was
found
burden-intensive
process,
a
total
damage
9
×
10−5
DALY
per
ton
human
health
category,
minor
contribution
all
categories
attributed
electricity
demands
(7.7
19.4%).
By
comparing
recycling,
an
environmental
benefit
20
mPt
26
kg
CO2
demonstrated,
indicating
process’s
expediency.
study
valuable
tool
up-scaling
processes
towards
circular
economy.
Innovative Infrastructure Solutions,
Journal Year:
2024,
Volume and Issue:
9(6)
Published: May 25, 2024
Abstract
India
ranks
among
the
foremost
global
producers
and
consumers
of
cement,
cement
industry
contributes
significantly
to
carbon
emissions.
Alkali-activated
materials
have
gained
significant
attention
as
a
sustainable
alternative
Portland
offering
potential
mitigate
dioxide
emissions
promote
effective
recycling
waste
materials.
Fly
ash
(FA)
Ground
granulated
blast
furnace
slag
(GGBS)
are
preferred
raw
for
concrete
(AAC)
owing
their
repurposing
waste,
widespread
accessibility,
advantageous
chemical
composition,
performance
attributes.
This
review
provides
comprehensive
analysis
current
state-of-the-art
on
durability
aspects
fly
ash/slag-based
AAC.
The
paper
explores
unique
characteristics
FA/GGBS-based
AAC,
emphasizing
enhance
structures.
Insights
into
material
behaviour
under
various
environmental
exposures,
including
aggressive
environments
freeze–thaw
cycles,
presented.
Furthermore,
article
addresses
both
obstacles
prospects
associated
with
implementing
AAC
construction
suitable
large-scale
infrastructure
projects.
overview
is
designed
direct
future
research
efforts
provide
practitioners
insights
ensuring
prolonged
Case Studies in Construction Materials,
Journal Year:
2024,
Volume and Issue:
20, P. e02919 - e02919
Published: Jan. 26, 2024
Geopolymer
is
promising
to
replace
cement,
thus
reducing
the
CO2
emissions
of
concrete
production.
However,
brittle
behavior
geopolymer
under
bending
loads
limits
its
engineering
applications.
This
work
adopted
epoxy
resin
and
polyurethane
modified
(PMER)
synthesize
resin-PMER
(EP)
emulsion,
which
was
further
added
into
metakaolin-based
matrix
for
toughening.
Moreover,
co-toughening
mechanism
on
revealed
based
changes
major
chemical
bonds
Si
binding
energy
before
after
modification.
The
results
show
that
introduction
PMER
does
contribute
improve
flexural
strength
by
enhancing
EP
toughness.
also
plays
an
adverse
role
in
Si-O-C
bond
generation
EP-modified
(EMG),
weakening
interconnections
between
3D
mesh
structures
inside
EMG.
A
balance
these
two
contrasting
effects
achieved
when
content
within
reaches
60
wt.%.
At
this
time,
addition
10
wt.%
can
increase
2.6
times.
Journal of Environmental Management,
Journal Year:
2024,
Volume and Issue:
366, P. 121734 - 121734
Published: July 8, 2024
This
paper
presents
an
overview
of
the
scholarly
works
employing
life
cycle
assessment
(LCA)
approach
to
evaluate
environmental
impact
construction
and
demolition
waste
(CDW)
fine
fractions
derived
from
concrete
elements
throughout
their
cycle.
Unlike
conventional
studies,
this
work
addresses
challenge
reducing
carbon
footprint
associated
with
CDW-based
building
materials,
emphasizing
mitigation.
The
study
highlights
that
approximately
30%
CDW
is
landfilled,
50%
recycled,
20%
used
as
fill
material,
underscoring
potential
for
increasing
recycling
rates
through
improved
processing
techniques
management
practices.
In
reviewed
most
research
has
been
conducted
in
Europe,
Asia,
USA,
China.
primary
secondary
data
sources
inventory
(LCI)
vary
depending
on
region
locality.
By
exploring
innovative
practices
critical
stages
utilization
components,
aims
contribute
greener
sustainable
resource
management.
distinctive
aspect
lies
its
comprehensive
review
aggregates,
binders,
alternative
cementitious
highlighting
significance
energy
resources
transportation
strategies
enhancing
sustainability
CDW-derived
concrete.
Key
findings
highlight
necessity
pretreatment
optimized
strategies,
including
route
planning
vehicle
selection,
produce
fraction-based
materials.
Additionally,
suggests
key
steps
parameters
required
defining
system
boundary
preparing
conducting
LCA
materials
based
fractions.
Through
a
detailed
analysis
burdens
at
each
production
stage,
seeks
promote
adoption
solutions
worldwide.
use
promotes
regardless
region.
