Abstract:
This study is focused on the prediction of the asphalt binder complex modulus at various temperatures and
various loading frequencies. The master curve approach was used to predict the asphalt binder behavior for a
wide range of temperatures and loading frequencies by applying the time-temperature superposition principle
for pressure ageing vessel (PAV) aged asphalt binder mixed with different percentages of sasobit asphalt
modifier. The complex modulus was measured using the dynamic shear rheometer (DSR) with a wide range
of loading frequencies (0.1 Hz-10 Hz) and a wide range of testing temperatures (16 oC-31 oC). The results
showed an increase in the complex modulus with increasing the loading frequency as well as with increasing
the sasobit percentage. However, the results showed a decrease in the complex modulus with increasing the
testing temperature. The use of the master curve approach showed a high degree of accuracy in predicting the
complex modulus for the asphalt binder.