Frontiers in Materials,
Journal Year:
2024,
Volume and Issue:
11
Published: Nov. 19, 2024
As
urbanization
continues
to
accelerate,
the
application
of
permeable
concrete
is
becoming
an
increasingly
prevalent
practice.
Nevertheless,
carbon
dioxide
emission
issue
associated
with
traditional
cannot
be
overlooked.
In
this
study,
alkali-activated
sintered
sludge
and
slag
were
employed
as
raw
materials
prepare
sludge-slag-based
concrete.
The
effects
calcination
temperature,
content,
binder-to-aggregate
ratio
on
compressive
strength,
porosity,
permeability
coefficient
investigated
through
implementation
one-way
experiments.
formation
mechanism
was
analyzed
using
scanning
electron
microscopy-energy
dispersive
spectroscopy
(SEM-EDS),
a
assessment
performed.
findings
indicated
that
increase
in
content
resulted
notable
decline
28-day
accompanied
by
reduction
Ca/Si
C-A-S-H
hydration
products,
from
1.08
0.35.
Conversely,
demonstrated
abiotic
losses
declined
markedly
effectively
mitigating
burden
construction
materials.
Recycling,
Journal Year:
2025,
Volume and Issue:
10(1), P. 12 - 12
Published: Jan. 16, 2025
Due
to
changes
in
the
German
government’s
energy
concept,
amount
of
gypsum
produced
flue
gas
desulfurisation
plants
(FGD
gypsum)
will
fall
from
5
million
tons
per
year
1
or
less
by
2038
at
latest.
As
2016,
FGD
accounts
for
55%
mix.
The
resulting
raw
material
gap
must
be
closed
through
innovative
recycling
concepts,
such
as
processing
existing
mine
dumps.
process
development
aims
achieve
a
calcium
sulfate
dihydrate
content
85%
and
reduction
stockpile
volume
50%.
main
components
stockpiles
are
form
stone
well
clay
minerals
organic
matter.
Successful
laboratory
tests
were
transferred
pilot
scale
jigging
machine
with
dewatering
screening.
water
is
circulated
throughout
entire
process.
heavy
fraction
76%
when
measured
ICP
OES
87%
via
thermogravimetric
methods.
Furthermore,
pilot-scale
dry
screening
on
took
place,
up
1500
could
processed.
fluctuating
weather
conditions,
quality
was
subject
significant
variations.
Under
optimal
60%
feed
recovered
stone;
however,
nearly
impossible
during
rain;
therefore,
combination
downstream
recommended.
Environmental Research Infrastructure and Sustainability,
Journal Year:
2025,
Volume and Issue:
5(1), P. 015020 - 015020
Published: March 6, 2025
Abstract
Global
production
of
building
materials
is
a
primary
contributor
to
greenhouse
gas
(GHG)
emissions,
but
the
these
necessary
for
modern
infrastructure
and
society.
Understanding
GHG
emissions
from
in
context
their
function
critical
decarbonizing
this
important
sector.
In
work,
we
present
estimates
global
production,
approximate
ranges
material
properties
12
classes
provide
unified
dataset
across
types.
This
drew
industry
analyses
emission
factors
within
type,
broad
reporting
thermal
mechanical
compare
both
between
Globally,
2019,
estimate
42.8
Gt
were
produced,
with
38.6
used
construction
industry.
As
result
9.3
CO
2
was
emitted,
or
25%
fossil
5.8
(16%
emissions)
due
applications.
Both
are
primarily
driven
by
structural
materials,
such
as
concrete
steel.
Material
selection
can
play
key
role
reducing
function,
variation
per
unit
strength
0.001–0.1
kg
/kg/MPa
insulation
R
-value/thickness
0.018–0.14
/kg/(K⋅m
W
−1
))).
The
developed
supporting
decision-making
providing
source
examining
properties,
quantity
produced.
