The static creep test was run for a total 1000 seconds. The test load was chosen
such that it produced a horizontal deformation of 150 200 micro-inches after 30
seconds of loading. The test temperature was taken to be 40 oC.
Finally, the measured creep compliance D(t) can be represented using the power
function equation (6-1).
D(t) = Do + D1 tm (Eq. 6-1)
Where Do, Di, and m are parameters obtained from creep tests. In accordance with
the findings from the evaluation of creep parameters from the Superpave Indirect Tensile
Test (Chapter 9) the value of Do is taken as 1/|E*|. The dynamic modulus |E*| is obtained
from the 10 Hz frequency test, to minimize variability of the results. Table 6-2 lists the
static creep test results, along with the power law parameters D1 and m.
Table 6-2. Average static creep testing results for test temperature of 400C.
Mixture Creep Power Law Parameters
Compliance
D (1000 DI m-value
seconds) (1/Mpa)
(1/MPa)
_(xl000)
Georgia Granite Mixtures
GAC1 19.63 8.93E-03 0.114
GAC2 17.02 5.01E-03 0.177
GAC3 15.97 6.83E-03 0.123
GAF1 17.79 5.31E-03 0.175
GAF2 9.52 3.45E-03 0.147
GAF3 11.64 3.50E-03 0.174
Whiterock Mixtures (Oolitic Limestone)
WRC1 1.57 4.14E-04 0.193
WRC2 1.23 3.78E-04 0.171
WRC3 1.96 6.27E-03 0.164
WRF1 26.03
8.50E-03 0.162