Abstract
The effect of a tack coat on the bond between asphalt concrete layers was investigated in the laboratory. First, the stresses at the interface caused by aircraft loads were calculated. Second, the effect of the tack coat on the bond was evaluated by examining the samples taken from in-service airport pavements where the interval between the construction of the wearing and binder courses was different. Third, an influence of factors such as adhered dirt and curing time of tack coat on the bonding characteristics was investigated. Finally, measures to ensure sufficient bonding were developed on trial; satisfactory strength can be obtained by using the newly-developed tack coat.
