Abstract:

Dynamic shear rheological tests including the frequency sweep and the creep test were performed to study the viscoelastic characteristics of epoxy asphalt. The results show that epoxy asphalt possesses the viscoelastic characteristics significantly different from those of the common modified asphalt. Epoxy asphalt behaves good elastic properties in a lager scope of temperature and frequency, with a very low viscous composition. It is of better high- temperature stability because its creep compliance is about 4 orders of magnitude lower than that of the common asphalt. It possesses obvious elastic characteristics because its complex modulus decreases with the frequency （or with the increase of the temperature） to a constant value together with the stock modulus. Moreover, it shows viscous property to a certain degree in high-frequency condition （or at high temperature）. All these findings indicate that epoxy asphalt is a kind of perfect construction material for pavement due to its good high-temperature distortion resistance and low-temperature crack resistance.

Key words: epoxy asphalt, rheology, viscoelastic characteristic