Synthesis on Composite Pavement Systems: Benefits, Performance, Design, and Mechanistic Analysis

Composite pavement systems have shown good potential for becoming a cost-effective pavement alternative for new construction of high volume roads. This paper discusses the potential benefits that composite pavement structures (flexible layer over a rigid layer) have to offer during their long service lives, investigates the structural design approaches used nationally and internationally, and compares the theoretical performance of typical composite pavement systems. Typical structural packages obtained using various design methodologies are evaluated, and the mechanistic responses (stresses and strains) of typical composite pavements are contrasted with that of a comparable flexible pavement. Fatigue and rutting models are used to further study the behavior of the composite pavements present in terms of these distresses. The results suggest that composite pavement structures can provide a long-lasting and effective alternative for roadways carrying very heavy traffic.