Civil Engineering Reference
In-Depth Information
FIGURE 9.28
Superpave simple performance test assembly.
s
o
sin
v
t
f
/
v
s
0
0
s
,
o
sin(
v
t
f
)
FIGURE 9.29
Stress and strain
pulses for the dynamic modulus test.
Time, t
The real and imaginary portions of the complex modulus
E*
can be
written as
E*
=
E¿+iE-
(9.21)
is generally referred to as the storage or elastic modulus component of
the complex modulus and
E¿
E-
is referred to as the loss or viscous modulus.
The phase angle
f
is the angle by which
e
o
lags behind
s
o
.
It is an indicator
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