Transportation Research Record Journal of the Transportation Research Board,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 8, 2024
Urban
heat
islands
(UHI)
have
become
an
increasingly
pressing
issue
owing
to
the
global
warming
trend
and
a
steady
growth
of
urban
areas.
Revegetation,
shading,
or
reduction
sealed
surfaces
is
not
always
possible
in
cities.
Therefore,
one
way
fight
UHIs
through
adapting
currently
used
pavements.
This
study
assesses
thermal
behavior
12
different
pavement
materials
custom-made
test
stand.
The
include
mastic
asphalt
(
MA
8,
8
white),
porous
PA
4,
4
abraded,
white,
concrete
AC
11
transparent,
yellow),
semi-flexible
pavements
SFP
zeolite).
albedo
was
assessed
using
pyranometer.
Sensors
imaging
were
measure
temperatures
during
two
simulated
cycles.
Both
underneath
specimens
at
surface
considered,
as
well
cooling
times
materials.
results
showed
high
maximum
for
MA,
low
maxima
white
painted
materials,
with
differences
up
15°C.
Porous
asphalt,
like
cools
faster
than
from
roughly
47°C
28°C,
taking
3.7
h
compared
8’s
5.1
h.
highlights
importance
considering
regional
solar
phases
experimental
setups.
Through
wide
range
tested
significant
linear
correlation
between
measured
temperature
proven.
Ultimately,
foundation
comparability
these
established.
Building and Environment,
Год журнала:
2023,
Номер
244, С. 110762 - 110762
Опубликована: Авг. 22, 2023
Densely
built
areas
are
affected
by
higher
air-pollutant
concentrations,
representing
a
significant
risk
to
public
health.
At
the
same
time,
urban
settlements
have
remarkable
environmental
impact:
cities
responsible
for
70%
of
annual
carbon
emissions
while
buildings
account
37%
global
energy
and
process
emissions.
Moreover,
people
living
in
frequently
exposed
extreme
micro-climate
conditions
caused
heat
island
effect,
related
increased
external
air
temperature
peculiarities
environment.
Given
this
framework
considering
Sustainable
Development
Goals,
it
is
necessary
point
out
some
effective
strategical
mitigation
measures
ameliorate
conditions,
reduce
pollutants
concentration
enhance
building
performance.
This
paper
investigates
potential
advantages
green
roofs
as
retrofitting
solutions
tree
planting
on
several
parameters
particulate
matter
concentration,
an
industrial
district
located
Italy
using
ENVI-met
software.
The
influence
extensive
roof
performance
further
investigated
at
level
recurring
Design
Builder
models.
Results
showed
that
could
up
1.5
°C,
outer
surface
15
°C
wind
speed
50%
compared
current
state
conditions.
application
let
also
achieve
savings
15%
both
summer
winter
seasons.
Focusing
effect
matter,
intensive
proved
be
more
efficient
capturing
pollutants.
Abstract
Porous
Asphalt
(PA),
with
its
open-graded
structure
and
high
air
voids,
offers
excellent
water
permeability,
reducing
runoff,
noise,
heat
from
the
pavement.
However,
it
has
low
strength
durability
is
prone
to
clogging,
as
large
pores
can
be
filled
particles
various
sources.
This
study
aims
evaluate
performance
of
PA
mixtures
incorporating
polymer-modified
bitumen
(PMB)
enhance
these
properties,
compared
unmodified
bitumen.
For
this
purpose,
styrene–butadiene–styrene
(SBS)
PMB
Pen
grade
60/70,
varying
porosities
(12%,
16%,
20%),
were
evaluated.
A
range
critical
parameters,
including
stability,
flow,
durability,
clogging
resistance,
skid
assessed
determine
overall
effectiveness
each
mixture.
The
results
show
that
exhibit
better
Marshall
Stability,
resistance
aggregate
loss,
seen
in
lower
mass
loss
Cantabro
test.
These
improvements
are
due
PMB’s
enhanced
adhesion
elasticity.
Additionally,
have
significantly
higher
permeability
those
bitumen,
likely
because
helps
maintain
voids
during
compaction.
also
remaining
after
10
cycles,
improved
retention
surface
texture.
Overall,
outperform
60/70
key
areas,
enhancing
both
mechanical
functional
offering
more
sustainable
solutions.
