Polymers,
Год журнала:
2024,
Номер
16(12), С. 1683 - 1683
Опубликована: Июнь 13, 2024
Amid
the
growing
demand
for
sustainable
pavement
solutions
and
need
to
incorporate
recycled
materials
into
construction
practices,
this
study
explored
viability
of
using
crushed
thermal
power
plant
bottom
ash
as
a
filler
in
polymer-modified
asphalt
concrete
mixtures.
Conventional
lime
was
replaced
with
at
varying
levels
(0%,
25%,
50%,
75%),
resulting
mixtures
were
evaluated
several
performance
tests.
The
optimal
replacement
level
determined
be
based
on
results
indirect
tensile
strength
(ITS)
test.
Comparisons
between
control
mixture
25%
ash-modified
conducted
dynamic
modulus
test,
Cantabro
Hamburg
wheel
tracking
(HWT)
ratio
(TSR)
findings
indicate
that
demonstrated
improved
across
multiple
parameters.
HWT
test
showed
enhanced
rut
durability,
recorded
depth
7.56
mm
compared
8.9
mixture.
revealed
lower
weight
loss
percentages
modified
mixture,
indicating
better
abrasion
resistance.
indicated
higher
resilience
stiffness
both
high-
low-frequency
stages.
TSR
highlighted
moisture
resistance,
values
after
10
wet-drying
cycles.
These
improvements
are
attributed
fine
particle
size
beneficial
chemical
composition
ash,
which
enhance
mixture’s
density,
binder-aggregate
adhesion,
overall
durability.
suggest
incorporating
is
viable
approach
improving
longevity.
Materials,
Год журнала:
2025,
Номер
18(5), С. 981 - 981
Опубликована: Фев. 23, 2025
To
investigate
the
adhesion
properties
of
asphalt
binder-aggregate
interfaces,
contact
angle
tests
were
performed
on
base,
aged,
and
SBS#
with
limestone
basalt
aggregates.
A
molecular
dynamics
simulation
model
was
established
to
analyze
interfacial
characteristics.
The
results
indicate
good
consistency
between
experimental
findings.
exhibited
superior
surface
free
energy
compared
base
asphalt,
whereas
aging
reduced
performance.
aggregates
is
closely
related
their
compositions.
When
moisture
penetrates
mixture,
significantly
increases,
that
basalt,
exhibiting
stronger
than
asphalt.
modifier
enhanced
aggregates,
thereby
providing
resistance
damage.
findings
this
study
possess
referential
value
for
selection,
modification,
performance
optimization
pavement
materials.
Case Studies in Construction Materials,
Год журнала:
2024,
Номер
21, С. e03552 - e03552
Опубликована: Июль 21, 2024
The
lower
radiation
intensity
(2–20
W/m2)
was
widely
used
for
asphalt
ultraviolet
(UV)
aging.
effect
of
high-intensity
on
properties
and
microscopic
morphology
is
unknown.
This
study
investigated
the
rheological
behavior,
characterization,
correlation
analysis
SBS
modified
under
UV
radiation.
Rheological
tests
encompassed
temperature
sweep
(TS),
multiple
stress
creep
recovery
(MSCR),
frequency
(FS).
Scanning
electron
microscopy
(SEM),
Fourier
transform
infrared
spectroscopy
(FTIR),
Gel
Permeation
Chromatography
(GPC)
were
performed
to
reveal
characterization.
In
early
stages
aging,
rutting
factor
increased.
increment
decreased
as
aging
time
process
did
not
alter
sensitivity
asphalt.
complex
shear
modulus
influenced
by
duration
loading
frequency.
Extended
exposure
resulted
in
formation
microcracks
surface
maximum
molecular
weight
UV-aged
higher
than
that
original
degraded
modifier
deteriorated
homogeneity
sulfoxide
index,
carbonyl
number-average
(Mn),
average
(Mw),
polymer
dispersity
index
(PDI)
presented
a
better
with
behavior
indexes.
between
small
molecule
size
(SMS),
medium
(MMS),
large
(LMS)
poor.
It
worth
mentioning
MSCR
test
results
performance
indicators
best.
Especially
rate
Jnr
at
3.2
kPa,
mean
absolute
value
coefficient
0.953.
Case Studies in Construction Materials,
Год журнала:
2024,
Номер
21, С. e03390 - e03390
Опубликована: Июнь 25, 2024
Salt-induced
erosion
from
de-icing
salts
in
Northern
China
and
sea
salt
Eastern
coastal
areas
significantly
compromises
asphalt
pavement
integrity.
A
selection
was
made
of
four
different
types
foamed
with
levels
water
content,
two
aged
asphalt,
three
typical
minerals
(α-quartz,
calcite,
bauxite),
addition
to
chloride
solutions
(NaCl,
CaCl2,
MgCl2).
It
found
that
(1)
dry
conditions,
the
moisture
level
noticeably
influences
adhesive
performance
at
juncture
between
aggregates.
Unlike
acidic
minerals,
bond
strength
alkaline
neutral
increases
as
content
rises;
(2)
presence
increased
reduced
aggregates,
particularly
impacting
(in
10
%
NaCl
solution,
work
adhesion
by
83.82
87.48
%,
respectively);
(3)
influence
diverse
on
interfacial
mixtures
varied,
reducing
asphalt-aggregate
44.52
21.90
34.94
respectively.
(4)
investigation
determined
mineral
composition
considerably
hygroscopic
sensitivity
mixtures.
Minerals
an
nature
exhibit
superior
resistance
when
juxtaposed
counterparts,
recommending
adoption
aggregates
scenarios
demanding
elevated
mixture
stability.
