ABSTRACT
Perpetual asphalt pavements, long-life, deep-strength, and extended-life pavements refer to structures designed for lives long enough to surpass the need for costly maintenance. The design of long lasting pavements is intended to confine pavement distresses to the surface layer which can be replaced or overlaid with a new one relatively easily. The pavement achieves an extended service life by regularly renewing its surface layer so that the overall pavement structure can remain in place perpetually. Layered pavements under specific loading conditions and the effect of the variability of these conditions on pavement’s longevity are studied in order to understand the technical behaviour of structures with a high strength surface layer. Different choices in software input have been tried. Reduction of damage per million equivalent single axle loads and increase in expected service-life has been achieved with increase of moduli values and thicknesses of different layers in the pavement structure.
