ABSTRACT
This paper conducted a comparative study of dynamic modulus of four asphalt mixes with two-point bend and uniaxial compression tests. Master Curves of dynamic modulus at 20°C reference temperature were analyzed and compared. Results showed that although the trends of the master curves of the two methods were similar, obvious differences existed: the dynamic moduli of two-point bend test was generally smaller, while the phase angle was larger. The differences of dynamic modulus and phase angle between the two methods were influenced by frequency (temperature). Dynamic modulus and phase angle of two-point bend test were more sensitive to frequency (temperature). SBS can improve pavement performance of asphalt mixes. Regression equations for the dynamic moduli conversion of the two methods were obtained. It is proposed that appropriate methods should be selected to test dynamic modulus of asphalt mixes according to stress state of pavement structures.
