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Investigating Effects of Amine-based Modifier on Recycled Asphalt Shingles Blending Index
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Investigating Effects of Amine-based Modifier on Recycled Asphalt Shingles Blending Index
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446.pdf
Description
Title
Investigating
Effects
of
Amine-based
Modifier
on
Recycled
Asphalt
Shingles
Blending
Index
Subject
Civil
,
Architectural
and
Environmental
Description
This
study
was
undertaken
to
investigate
the
effects
of
amine-based
modifiers
on the
rheological
characteristics
of
particle-filled
viscous
media
such
as
recycled
asphalt
shingles
(RAS)
.
RAS
are a
recycled
material
that
contains
high
concentrations
of
asphalt
which
has the
potential
for
use
in
hot
mix
asphalt
(HMA)
when
added
to
virgin
asphalt
.
When
using
the
RAS
as a
binder
in
HMA
it
is
important
to
mix
it
with the
virgin
asphalt
properly
to
achieve
the
best
performance
,
which
can
also be
enhanced
by the
incorporation
of
amine-based
modifiers
.
Tear-off
shingles
were
acquired
from a
roofing
company
and
ground
very
fine
so
that
85%
of the
particles
passed
through
sieve
number
200
. The
virgin
asphalt
binder
(PG
64-22)
and
three
(20%
,
30%
,
&
40%)
percentages
of
grounded
RAS
were
blended
at a
temperature
of
180°C
at a
rotational
speed
of
400
rpm
. These
three
mixtures
were then
blended
with
three
different
amine-based
modifiers
(1.5%
of
Rediset®
,
0.5%
of
Evotherm®
, and
5%
of
bio-binder
by
weight
of
mixture)
at
135oC
and a
rotational
speed
of
400
rpm
. The
percentage
of
each
modifier
was
selected
based
on
recommendations
of the
manufacturers
. The
properties
of the
blended
binder
were
studied
using
a
rotational
viscometer
(RV)
utilizing
a
Brookfield
Viscometer
DVIII-Ultra
.
Two
different
spindles
were
used
to
measure
the
viscosity
of the
binders
at
four
different
temperatures
(105oC
,
120oC
,
135oC
, and
150oC)
and
six
(5
,
10
,
20
,
25
,
50
, and
100)
different
rotational
speeds
. The
analysis
showed
that
viscosity
increased
with
increasing
percentages
of
RAS
;
however
, the
viscosities
decreased
after
incorporation
of the
amine-based
modifiers
.
Creator
Sedhay
,
Govinda
Publisher
North Carolina Agricultural and Technical State University
Date
2014
Type
TEXT
Format
PDF
Language
English
Major Professor
Fini
,
Elham
H
.
Academic Department
Civil
,
Architectural
and
Environmental
Degree
MASTER
OF
SCIENCE
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