Journal of Physics Conference Series,
Journal Year:
2024,
Volume and Issue:
2893(1), P. 012047 - 012047
Published: Nov. 1, 2024
Abstract
Phase
Change
Materials
(PCMs)
in
building
materials
can
significantly
reduce
energy
consumption
heating
and
cooling
systems.
PCMs
absorb,
store,
release
thermal
by
transitioning
between
solid
liquid
states
based
on
external
temperatures,
helping
to
regulate
indoor
temperatures
lower
use.
This
study
evaluates
the
performance
of
various
mortar
compositions
containing
made
from
hydraulic
lime
cement.
The
were
developed
using
“form-stable”
method,
incorporating
a
porous
matrix
Lecce
Stone
(LS),
known
for
its
high
porosity,
sourced
processing
waste,
supporting
sustainability
principles.
selected
Polyethylene
Glycol
(PEG)
with
molecular
weights
800
1000
g/mol,
suitable
Mediterranean
climate
temperatures.
that
characterize
this
geographic
area
simulated
climatic
chamber
assess
behavior
mortars
across
all
four
seasons.
results
showed
composite
form-stable
effectively
mitigated
temperature
fluctuations,
reducing
need
cooling.
Additionally,
savings
calculations
demonstrated
significant
reductions
costs,
underscoring
potential
enhance
efficiency.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(16), P. 7057 - 7057
Published: Aug. 17, 2024
The
high
global
energy
demand
drives
the
search
for
sustainable
alternatives
production
and
storage.
Among
most
effective
solutions
are
phase
change
materials
(PCMs).
In
particular,
organic
PCMs
offer
a
capacity
to
store
release
thermal
in
response
external
variations,
even
over
wide
temperature
range.
They
find
profitable
applications
various
sectors,
from
construction
electronics,
offering
flexibility
considerable
storage
according
need.
new
PCMs,
reusing
by-products
different
industries
would
both
economic
environmental
benefits.
With
this
goal
mind,
several
with
characteristics
origins
were
analyzed
present
study.
Two
of
them
lost
wax
casting
industry.
fact,
we
wanted
verify
whether
waste
could
be
employed
as
an
effective,
low-cost
PCM.
For
comparison
purposes,
two
commercial
selected,
namely
paraffin
microencapsulated
Finally,
PCM
blend
was
produced
by
mixing
waxy
by-product.
five
selected
or
developed
subjected
tests
investigate
their
chemical
composition,
characteristics,
stability
before
after
repeated
(i.e.,
100)
cycles
melting
crystallization
processes.
results
demonstrated
that
durability
non-commercial
regard
loads
not
inferior,
some
cases
superior,
PCMs.
This
study
therefore
proposes
innovative
path
reuse
processes
support
environment.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: July 13, 2024
Abstract
Sustainable
multi-story
building
designs
are
gaining
increasing
attention
in
light
of
the
green
development
industry.
Recently,
many
studies
have
been
conducted
to
determine
optimized
embodied
energy
considering
size
structural
members
and
materials
strength
using
a
single
objective
function.
In
this
context,
current
study
adopted
multi-objective
function
based
on
cost
Embodied
Energy
(EE)
for
sustainable
design
entire
building.
A
BuildingEnergy
computer
program
is
used
assess
consumption
performance
reinforcement
cement
concrete
Based
proposed
method,
an
analysis
carried
out
compare
optimal
solutions
Furthermore,
detailed
parametric
was
explore
main
factors
energy-efficient
column
beam
design.
The
results
revealed
that
with
comparison
most
“carbon-friendly”
“cost-friendly”
solutions,
added
6–7%
can
contribute
up
13%
emission
reduction.
sectional
dimensions,
steel
rebar,
strengths,
ratio,
height,
eccentricity
remarkably
influence
design,
optimization,
minimum
carbon
emission.
Overall,
could
help
define
cost-effective
members.
Eventually,
EE
confirmed
be
feasible
parameter
designing
more
RCC
buildings.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(16), P. 6775 - 6775
Published: Aug. 7, 2024
The
development
and
understanding
of
the
behavior
construction
materials
is
extremely
complex
due
to
great
variability
raw
that
can
be
used,
which
becomes
even
more
challenging
when
functional
materials,
such
as
phase-change
(PCM),
are
incorporated.
Currently,
we
witnessing
an
evolution
advanced
well
powerful
tools
for
modeling
engineering
problems
using
artificial
intelligence,
makes
it
possible
predict
composite
materials.
Thus,
main
objective
this
study
was
exploring
potential
machine
learning
mechanical
physical
mortars
with
direct
incorporation
PCM,
based
on
own
experimental
databases.
For
data
preparation
modelling
process,
cross-industry
standard
process
mining,
adopted.
Seven
different
models,
namely
multiple
regression,
decision
trees,
principal
component
extreme
gradient
boosting,
random
forests,
neural
networks,
support
vector
machines,
were
implemented.
results
show
potential,
models
forests
networks
demonstrated
achieve
a
very
good
fit
prediction
compressive
strength,
flexural
water
absorption
by
immersion,
capillarity
PCM.
Construction Materials,
Journal Year:
2024,
Volume and Issue:
4(1), P. 154 - 172
Published: Feb. 1, 2024
This
study
investigated
the
influence
of
carbon
fibre
addition
on
thermal
performances
gypsum
compositions
doped
with
20
wt
%
phase-change
material
(PCM)
microspheres.
The
influences
length
(150
µm/3
mm)
and
additive
amount
(0.5/2/4
%)
fibres
were
investigated.
Characterizations
performed
throughout
various
preparation
steps
to
check
that
materials
aligned
construction
standards.
consistency
3
mm
did
not
seem
be
suitable
for
implementation.
On
contrary,
thanks
an
adequate
thinning
additive,
150
µm
showed
acceptable
implementation
properties.
tested
in
a
climatic
chamber
under
temperature
cycles
either
favourable
(15
°C/40
°C)
or
unfavourable
(20
regeneration
process
PCM.
Tests
plateau
at
40
°C/15
°C
also
obtain
better
understanding
behaviours.
tests
using
walls
thicknesses
15
30
mm.
results
show
that,
all
cases,
was
beneficial
performance
These
observations
opposition
those
other
studies
literature.
We
hypothesized
these
composite
would
different
convective
conductive
fluxes.
It
shown
conditions
°C),
large
thickness
could
fully
regenerated,
even
fibres.
However,
PCM
boxes
thick
deactivated
faster
(after
~400
min)
than
~700
min).
Finally,
laboratory
compared
previous
large-scale
study.
estimated
despite
surface-to-volume
ratio
25
times
higher,
energy
storage
efficiency
only
increased
by
factor
2.6
between
our
Hence,
seems
mainly
involved
maintaining
rather
air.
Materials,
Journal Year:
2024,
Volume and Issue:
17(12), P. 2880 - 2880
Published: June 12, 2024
Thermal
storage
cement-based
materials,
formed
by
integrating
phase
change
materials
into
cementitious
exhibit
significant
potential
as
energy
materials.
However,
poor
thermal
conductivity
severely
limits
the
development
and
application
of
these
In
this
study,
an
amorphous
SiO2
shell
is
encapsulated
on
a
graphite
surface
to
create
novel
thermally
modified
admixture
(C@SiO2).
This
material
exhibits
excellent
conductivity,
surface-encapsulated
enhances
its
bond
with
cement.
Further,
C@SiO2
was
added
at
different
volume
ratios.
The
effects
were
evaluated
measuring
fluidity,
properties,
temperature
change,
compressive
strength
various
results
indicate
that
newly
designed
10
vol%
increases
coefficient
63.6%
latent
heat
transition
11.2%
compared
common
Moreover,
does
not
significantly
impact
fluidity
material.
study
suggests
promising
additive
for
enhancing
in
candidate
applications.
Materials,
Journal Year:
2024,
Volume and Issue:
17(15), P. 3731 - 3731
Published: July 27, 2024
The
development
of
construction
materials
with
the
integration
phase
change
(PCMs)
has
been
a
topic
wide
interest
in
scientific
community,
especially
recent
years,
due
to
its
positive
impact
on
temperature
regulation
inside
buildings.
However,
little
is
known
about
behavior
doped
PCMs
when
exposed
accidental
or
severe
environments.
Currently,
large
area
planet
experiences
seasonal
freeze-thaw
effects,
which
durability
and
performance
materials.
Accordingly,
main
objective
this
study
was
evaluate
damage
caused
by
cyclic
actions
cement
mortar,
including
PEG-based
form-stable
PCM.
An
experimental
methodology
developed
based
physical
mechanical
characterization
mortars
under
normal
operating
conditions
after
being
subjected
cycles.
results
indicated
that,
exposure
conditions,
incorporation
aggregate
functionalized
PCM
led
decrease
mortar's
water
absorption
capacity,
compressive
strength,
adhesion.
applicability
not
compromised.
Exposure
cycles
loss
mass
specimens
strength
adhesion
capability
mortar.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(17), P. 2463 - 2463
Published: Aug. 29, 2024
This
paper
presents
a
two-stage
microencapsulation
process
that
uses
pH
modulation
to
enhance
the
thermal
stability
of
microcapsules
consist
melamine–formaldehyde
(MF)
shell
and
butyl
stearate
core.
In
first
stage,
value
was
modulated
between
6.0
8.0.
Rising
8.0
slowed
polycondensation
rate,
allowing
MF
resin
with
lower
degree
polymerization
migrate
capsule
surface
form
smooth
shell.
Lowering
accelerated
polycondensation.
second
relatively
fast,
continuous
reduction
in
5.0
led
further
polycondensation,
hardening
Post-curing
at
100
°C
prevented
damage
caused
by
liquid–gas
phase
transition
core
material
during
process.
The
produced
increasing
twice
demonstrated
improved
stability,
only
minimal
overall
weight
loss
5%
300
°C.
Significant
observed
350
400
°C,
temperatures
which
methylene
bridges
undergo
degradation.
results
from
differential
scanning
calorimetry,
electron
microscopy,
thermogravimetry
analyses
confirmed
successful
optimization
microencapsulation,
showing
these
are
promising
for
energy
storage
other
applications
require
high
stability.
