ABSTRACT
A long service life of asphalt pavements can be achieved through a good and durable interlayer bond. A new apparatus for Cyclic Testing of the Interlayer Bond (CTIB) in double-layered asphalt specimens has been developed to determine the shear stiffness at the interface between asphalt layers. In order to examine the interactions of repeated traffic loading, acceleration and braking processes as well as temperature, an extensive testing procedure has been created taking into account all the parameters that influence the interlayer bond. Experimental tests have been carried out under sinusoidal repeated shear loading conditions at varying frequencies and temperatures under different normal stresses. The dependence of the combined effect of temperature, shearing frequency and normal pressure on shear stiffness has been approximated with sigmoid master functions.
