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design I-Material |
( O |
aggregate O |
type O |
, O |
binder O |
content O |
, O |
etc. O |
) O |
. O |
Long B-Process |
term I-Process |
studies I-Process |
in I-Process |
Finland I-Process |
concluded O |
that O |
this O |
empirical O |
fit O |
is O |
an O |
exponential B-Task |
relationship I-Task |
[ O |
1 O |
] O |
. O |
The O |
exponential O |
fits O |
, O |
using O |
a O |
sufficient B-Process |
amount I-Process |
of I-Process |
cores I-Process |
, O |
can O |
be O |
used O |
to O |
map B-Task |
the I-Task |
air I-Task |
void I-Task |
content I-Task |
variation I-Task |
in O |
a O |
similar O |
manner O |
to O |
the O |
dielectric B-Material |
maps I-Material |
shown O |
in O |
Fig. O |
4. O |
Only O |
4 O |
cores O |
were O |
feasible O |
due O |
to O |
various O |
factors O |
involved O |
with O |
testing B-Task |
the I-Task |
final I-Task |
lift I-Task |
of O |
an O |
in-service O |
pavement O |
. O |
More O |
cores O |
are O |
needed O |
for O |
more B-Task |
stable I-Task |
exponential I-Task |
coefficients I-Task |
, O |
although O |
the O |
limited O |
cores O |
show O |
that O |
the O |
predicted B-Process |