ABSTRACT
This paper focuses on investigating the interface shear fatigue performance of asphalt pavement structures. A new test protocol is proposed based on cyclic shear loading of the interface between two asphalt layers. Resulting from cyclic shear testing, a unique shear fatigue function is derived depending on layer and bonding materials used, on shear and compressive normal stress level, and on test temperature. The test protocol can be advantageously used to evaluate interface bonding of asphalt pavement structures alternatively to the static shear test, and to differentiate between different design choices of interface bonding.
