Asphalt overlays

Keeping the existing road pavement inventory in a serviceable condition is one of the major challenges of road authorities worldwide. Therefore, the focus of attention is on maintenance techniques and rehabilitation methods which allow the working life of the basic road structure to be extended in a cost-effective and technically reliable manner. One method which has been successfully used worldwide for more than 30 years is the maintenance of asphalt and concrete roads using paving interlayers. This method represents an economical means of considerably increasing the maintenance intervals and thus the working life of the road.