Research
involving
the
application
of
waste
materials
in
concrete
has
gained
prominence
academic
community,
aiming
to
promote
cleaner
management
while
enhancing
properties.
This
study
reviews
publications
that
have
assessed
influence
recycled
synthetic
fibers
on
concrete,
observing
improvements
their
main
The
analysis
results
reported
articles
revealed
that,
for
any
type
fiber,
there
is
a
significant
loss
workability
worsens
as
fiber
dosage
increases.
Additionally,
compressive,
flexural,
and
tensile
strengths
are
observed
up
2%
volume
added
concrete.
can
be
attributed
"bridging"
effect
caused
by
adhesion
friction
matrix,
delaying
initiation
propagation
cracks
microcracks
under
mechanical
stress
or
drying
shrinkage.
It
was
also
modulus
elasticity
not
significantly
affected.
Furthermore
demonstrated
performance
compatible
with
commercially
available
virgin
fibers,
indicating
they
serve
effective
replacements,
witch
contributes
mitigation
natural
resource
extraction,
energy
consumption,
CO2
generation
from
production
well
promoting
circular
economy.
Results in Engineering,
Год журнала:
2023,
Номер
20, С. 101629 - 101629
Опубликована: Ноя. 29, 2023
This
paper
assessed
the
effects
of
mainshock-aftershock
(MS-AS)
sequences
on
seismic
vulnerability
intermediate
reinforced
concrete
moment
frames
(IRCFs),
considering
various
mainshock
intensity
scenarios.
Moreover,
given
limited
library
real
MS-AS
ground
motion
in
Iran
plateau,
a
sequence-selection
method
is
proposed
to
generate
artificial
that
incorporate
magnitude,
seismotectonic
region,
fault
mechanism,
and
site
condition
target
area.
Three
4-,
7-,
10-story
IRCFs,
modeled
OpenSees
software,
are
subjected
as
well
collapse
fragility
curves
derived
using
incremental
dynamic
analysis
(IDA)
results.
The
results
show
occurrence
can
significantly
increase
buildings
during
aftershock.
For
scenarios,
general
decrease
capacity
observed
across
all
mainshock-damaged
buildings,
with
more
significant
for
taller
buildings.
Hence,
it
essential
consider
aftershock
design
IRCFs
mitigate
risk
collapse.
Furthermore,
by
comparing
responses
caused
those
sequences,
validity
confirmed;
thus,
be
used
substitute
sequences.
Regression
equations
also
presented
predict
reduction
different
story
numbers
presence
Buildings,
Год журнала:
2023,
Номер
13(12), С. 3069 - 3069
Опубликована: Дек. 9, 2023
This
research
takes
on
a
scientific
problem
originating
from
the
pervasive
deterioration
observed
in
pavements
of
Bus
Rapid
Transit
(BRT)
systems,
which
presents
formidable
challenges
to
their
durability
and
imposes
significant
financial
burdens
BRT
organizations.
While
wear
tear
is
widely
recognized
concern,
there
exists
pronounced
deficiency
sustainable
solutions
address
this
issue
comprehensively.
study
endeavored
bridge
gap
by
exploring
option
incorporating
waste
plastic
aggregate
(WPA)
recycled
asphalt
pavement
(RAP)
into
material.
The
series
comprehensive
investigations
commenced
with
an
assessment
modified
binders.
We
identified
25%
extracted
RAP
binder
as
most
suitable
candidate.
Our
next
determined
that
4%
WPA
content
offers
optimal
results
when
used
replacement
stone-modified
concrete
mix,
further
refined
13
mm
nominal
maximum
size
(NMAS)
gradation,
resulting
superior
performance.
Under
double-load
conditions
Hamburg
Wheel
Tracking
test,
rutting
10
NMAS
mixture
rapidly
increased
9
after
12,400
HWT
cycles,
while
showed
more
gradual
ascent
same
critical
level
20,000
cycles
(a
61%
increase).
Real-world
application
at
designated
station
area
Seoul
reinforced
findings,
revealing
use
significantly
improved
performance,
reducing
75
µm
enhancing
resilience.
configuration
Road
Bearing
Capacity
(RBC)
5400
MPa
center
zone,
showcasing
load-bearing
capability.
Conversely,
without
experienced
severe
(220
µm)
76%
reduction
RBC
1300
MPa,
indicating
diminished
durability.
In
general,
highlights
need
for
innovative
maintenance
novel,
environmentally
friendly,
high-performance
alternative
traditional
methods.
