Sustainability,
Journal Year:
2024,
Volume and Issue:
17(1), P. 152 - 152
Published: Dec. 28, 2024
This
study
evaluates
the
environmental
impact
of
alkali-activated
concrete
materials
(AACMs)
as
alternatives
to
conventional
concrete.
The
influence
binder
and
activator
content
type,
along
with
other
mix
parameters,
is
analysed
using
a
probabilistic
embodied
carbon
assessment
on
large
dataset
that
includes
580
mixes.
Using
cradle-to-gate
approach
region-specific
life-cycle
inventory
data,
emissions
are
against
intensity,
activator-to-binder
water-to-binder
ratios,
fresh/mechanical
properties.
A
multicriteria
quantifies
best-performing
in
terms
carbon,
compressive
strength,
slump.
AACM
compared
through
existing
classification
schemes
literature.
vary
between
41
261
kgCO2eq/m3,
activators
contributing
most
(3–198
kgCO2eq/m3).
Uncertainty
transport-related
could
shift
these
values
by
±38%.
AACMs
can
achieve
up
four-fold
less
for
high-strength
concrete,
although
this
benefit
decreases
lower
mechanical
sustainability
depends
characteristics,
curing,
design,
transportation.
Journal of CO2 Utilization,
Journal Year:
2024,
Volume and Issue:
84, P. 102860 - 102860
Published: June 1, 2024
Coal,
one
of
China's
most
abundant
natural
resources,
plays
a
crucial
role
in
providing
substantial
energy
and
promoting
economic
growth.
However,
the
disposal
storage
large
quantities
coal-based
solid
waste
(CBSW),
such
as
coal
gangue
(CG),
fly
ash
(FA),
gasification
slag
(CGS),
generated
during
production
utilization
processes,
pose
serious
social
environmental
challenges.
The
application
construction
materials
field
has
garnered
significant
attention
is
anticipated
to
become
primary
treatment
method
future.
This
paper
comprehensively
reviews
characteristics,
pretreatment
methods,
performance
typical
CBSWs,
aiming
offer
basis
valuable
reference
for
optimizing
inherent
properties
its
utilization.
Additionally,
it
discusses
influence
various
carbonation
curing
parameters
on
CO2
capture
elucidates
impact
mechanism
CBSW
concrete.
study
holds
great
significance
building
carbon
reduction,
particularly
regions
with
high
emissions.
Sustainability,
Journal Year:
2025,
Volume and Issue:
17(6), P. 2754 - 2754
Published: March 20, 2025
Addressing
global
warming
has
become
an
urgent
priority.
According
to
a
recent
United
Nations
study,
the
population
is
expected
exceed
9.7
billion
by
2050,
with
majority
residing
in
urban
areas.
Consequently,
high-rise
buildings
are
anticipated
dominate
built
environment,
emphasizing
need
for
their
sustainability.
Currently,
reinforced
concrete
and
structural
steel
primary
materials
used
construction
of
tall
remain
standard
most
skyscrapers.
This
paper
examines
significant
issue
embodied
carbon
these
materials.
In
engineering
practice,
efficiency
constructability
key
considerations.
The
sustainability
been
well-documented,
organizations
such
as
American
Institute
Steel
Construction
(AISC)
leading
efforts
this
area.
objective
study
demonstrate
that
systems
not
only
efficient,
constructible,
durable
but
also
sustainable.
By
conducting
life
cycle
assessments,
illustrates
how
efficiency,
sequencing,
design
compatibility
can
significantly
reduce
buildings.
Similarly,
substantial
underway
concrete,
cement
being
contributor
emissions.
Recent
advancements
non-cementitious
improving
concrete.
applies
same
assessment
methodologies
well-designed
well-constructed
structures
achieve
minimal
footprint.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(21), P. 9271 - 9271
Published: Oct. 25, 2024
This
study
analyzed
environmental
impacts
and
economic
feasibility
to
evaluate
whether
recycling
fly
ash,
which
has
rarely
been
addressed
in
previous
studies,
as
a
raw
material
for
lightweight
aggregates
can
be
sustainable
waste
management
alternative.
presents
comparative
analysis
of
three
disposal
scenarios:
landfill
disposal,
cement
material,
aggregate
material.
Nine
were
assessed
through
life
cycle
assessment
(LCA):
acidification,
global
warming,
eutrophication,
photochemical
oxidation,
stratospheric
ozone
depletion,
human
toxicity,
freshwater
aquatic
ecotoxicity,
marine
terrestrial
ecotoxicity.
The
results
showed
that
the
scenario
posed
greatest
threat
while
had
impact
on
other
ecotoxicity
items
lowest
most
except
acidification
oxidation.
Life
costing
(LCC)
was
also
performed
compare
aspects
each
scenario.
is
more
energy-intensive
costly,
but
it
significant
benefits
due
revenues
from
products
produced.
Therefore,
even
though
cost
high,
this
considered
economically
advantageous.
highlights
ash
into
reduces
impacts,
provides
benefits,
better
alternative
landfilling
materials.
It
will
contribute
promoting
practices
recycling.
The
application
of
incineration
fly
ash
(IFA)
sintering
technology
has
brought
a
large
amount
secondary
(SFA)
rich
in
heavy
metals
and
chlorides,
its
treatment
attracted
much
attention.
A
unique
three-step
involving
acid
washing,
metal
precipitation,
chloride
evaporation
recently
been
developed
to
achieve
complete
resource
utilization
SFA.
industrial
test
results
showed
that
the
optimum
liquid/solid
(L/S)
ratio
Ca(OH)2
added
were
2:1
30%,
respectively,
washing
step.
In
precipitation
step,
use
solid
NaOH
precipitant
at
pH
10
was
optimal
for
removal
metals.
For
evaporation,
average
consumption
steam
electricity
each
tonne
filtrate
0.4
t
16.5
kw·h,
respectively.
Furthermore,
environmental
impact
three
steps
evaluated
separately
through
life
cycle
assessment
(LCA)
method
based
on
results.
indicated
stage
had
greatest
whole
process.
Finally,
considering
IFA
ceramics
plant
available
deacidification
waste
solution
heat
flue
gas,
potential
improving
economic
performance
overall
process
technological
innovation
analyzed
using
LCA
costing
(LCC)
method.
optimization
scenario
with
two
innovative
units
performed
better
terms
sustainability,
decreasing
global
warming
by
29.5%
compared
normal
scenario.
LCC
demonstrated
an
value
−8.15
USD/t
more
economically
efficient
than
4.27
USD/t.
