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Simple test procedure for evaluating low temperature crack resistance of asphalt concrete, A
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Simple test procedure for evaluating low temperature crack resistance of asphalt concrete, A
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Simple test procedure for evaluating low temperature crack resistance of asphalt concrete, A
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Description
Title
Simple
test
procedure
for
evaluating
low
temperature
crack
resistance
of
asphalt
concrete
, A
Subject
TE275.K56
2009
;
Pavements
,
Asphalt
concrete--Cracking--Ohio.
;
Pavements
,
Asphalt
concrete--Ohio--Testing.
;
OTP
1.23/7:2009-05
Description
"
November
2009.
";
Includes
bibliographical
references
(p
.
85-89).
;
Final
report.
;
Prepared
by
Ohio
Research
Institute
for
Transportation
and the
Environment
in
cooperation
with the
Ohio
Dept
. of
Transportation
,
Office
of
Research
and
Development
, and
U.S
.
Dept
. of
Transportation
,
Federal
Highway
Administration
under
state
job
no.
;
Harvested
from the
web
on
1/5/10
Creator
Kim
,
Sang
Soo
,
1950-
Publisher
Ohio
Research
Institute
for
Transportation
and the
Environment
;
Available
through
the
National
Technical
Information
Service
Contributors
Sargand
,
S
.
M
.
(Shad
M.)
;
Wargo
,
Andrew
D.
;
Ohio
Research
Institute
for
Transportation
and the
Environment.
;
Ohio
.
Dept
. of
Transportation
.
Office
of
Research
and
Development.
;
United
States
.
Federal
Highway
Administration
.
Type
Text
Language
eng
Relation
Also
available
online
from the
Ohio
Dept.
of
Transportation's
Web
site
;
Adobe
Reader
required.
;
http://www.dot.state.oh.us/Divisions/TransSysDev/Research/reportsandplans/Reports/2009/Pavement/134260_FR.pdf;
http://worldcat.org/oclc/489734907/viewonline;
http://www.dot.state.oh.us/Divisions/TransSysDev/Research/reportsandplans/Reports/2009/Pavement/134260_ES.pdf
Description-Abstract
The
current
means
of
evaluating
the
low
temperature
cracking
resistance
of
HMA
relies
on
extensive
test
methods
that
require
assumptions
about
material
behaviors
and the
use
of
complicated
loading
equipment
. The
purpose
of this
study
was to
develop
and
validate
a
simple
test
method
to
directly
measure
the
cracking
resistance
of
hot
mix
asphalt
under
field-like
conditions
. A
ring
shape
asphalt
concrete
cracking
device
(ACCD)
was
developed
.
ACCD
utilizes
the
low
thermal
expansion
coefficient
of
Invar
steel
to
induce
tensile
stresses
in a
HMA
sample
as
temperature
is
lowered
. The
results
of the
tests
of the
notched
ring
shaped
specimens
compacted
around
an
ACCD
Invar
ring
showed
good
repeatability
with
less
than
1.0??C
(1.8??F)
standard
deviation
in
cracking
temperature
. A
laboratory
validation
indicated
that
ACCD
results
of
five
mixes
correlate
well
with
thermal
stress
restrained
specimen
test
(TSRST)
results
with the
coefficient
of
determination
,
r?
?
=
0.86
. To
prepare
a
sample
and
complete
TSRST
measurement
,
it
takes
minimum
2-3
days
. For
ACCD
,
two
samples
can
be
easily
prepared
and
tested
in a
single
day
with a
small
test
set-up
. The
capacity
of
ACCD
can
be
increased
easily
with
minimal
cost
to
accommodate
a
larger
number
of
samples
.
Among
factors
affecting
the
low
temperature
performance
of
HMA
, the
coefficient
of
thermal
expansion
(CTE)
of
aggregate
has been
overlooked
for
years
. A
composite
model
of
HMA
is
proposed
to
describe
the
low
temperature
cracking
phenomenon
.
Due
to the
orthotropic
and
composite
nature
of
asphalt
pavement
contraction
during
cooling
, the
effects
of
aggregate
CTE
is
amplified
up
to
18
times
for a
typical
HMA
. Of
14
Ohio
aggregates
studied
, the
maximum
and the
minimum
CTEs
are
11.4
and
4.0
x
10-6/??C
,
respectively
.
During
cooling
, the
contraction
of
Ohio
aggregate
with
high
CTE
can
double
the
thermal
strain
of
asphalt
binders
in the
asphalt
mix
and
may
cause
asphalt
pavement
thermal
cracking
at
warmer
temperature
.
Date-Issued
[2009]
Format-Extent
x
,
108
p
. :
ill
. ;
28
cm
.
Format-Medium
Government
Publication
OCLC number
489734907
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