RATIONAL AND PRACTICAL DESIGNS OF ASPHALT PAVEMENTS TO AVOID CRACKING AND RUTTING --PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON THE STRUCTURAL DESIGN OF ASPHALT PAVEMENTS HELD DEFLT UNIVERSITY OF TECHNOLOGY, AUGUST 23-26 1982. VOL 1 AND 2. -- NETHERLANDS

Abstract

The structural design approaches to asphalt pavements, presented at the 4th international conference (ann arbor 1977) are improved. For the rational approach, the improvements concern the design against cracking by fatigue of the bituminous layers and are based on a new resistance criterion taking into consideration the beneficial influence of the rest periods between the loads. They also concern the design against permanent deformation (limitation of the rut depth) and this on the basis of new results obtained in the field of the mechanical properties which define, for bituminous mixes, the law of permanent deformation to be considered in practical applications. For the engineering approach, and with a view to including the above improvements, new design charts are set up. Moreover, a simplified method to determine the resistance to rutting is presented; its application complements the information that can be obtained from the design charts. Finally, experimental verifications are presented.(a) for the covering abstract of the conference see IRRD 815640.