4.2.2 Dynamic Shear Rheometer
The Dynamic Shear Rheometer test was conducted to obtain G* and 6 at both
10"C and 20"C. This test was conducted at multiple frequencies to convert the dynamic
test results to power model creep compliance parameters.
4.2.2.1 Dynamic Shear Rheometer at low frequencies
The frequencies used in the low frequency test were: 0.001, 0.002, 0.004, 0.008,
0.015, 0.03 Hz. The typical test result is shown in table 4.8.
Table 4.2 Dynamic Shear Rheometer Test Results at Low Frequencies at 10C
Frequency (Hz) Phase Angle ( 6 ) Viscosity (Pa s) Shear Stress (Pa)
0.001 10.72 2.78 x 106 3.68 x 102
0.002 78.80 2.42 x 107 8.60 x 101
0.004 58.93 2.16 x 107 1.02 x 103
0.008 55.97 1.66 x 107 1.67 x 103
0.015 56.48 1.26 x 107 2.38 x 103
0.03 53.86 9.70 x 106 3.77 x 103
The results indicated that, reasonable results could not be obtained at very low
frequencies. Therefore, the conversion to power model parameters was more difficult and
unreliable. The figure below showed another problem with very low frequency tests.