Asphalt pavement structure combination considering adverse effect of pore pressure

To investigate the effect of moisture on different asphalt pavement structures, the maximum interface pore pressure were analyzed by using the finite element models considering 16 structure projects subjected to dynamic load based on saturated porous media theory. The asphalt pavement structures were proposed according to the minimal adverse effect of pore pressure on pavements in different regions of China. Results show that the investigation project 8 (OGFC-13+AC-20+ATPB-25 + cement stabilized gravel base + graded crushed stone) appears the minimal pore pressure. While the application of ATPB of pavement structure can reduce the pore pressure effectively. Pore pressure of pavement with cement stabilized gravel base is bigger than that of lean concrete base. The paper suggests that the investigation project 8 should be used in the rainy southward region of China. The pavement which surface layer is dense graded asphalt mixtures (AC) and the base is lime-fly ash soil should be used in rainless region of China, and moreover, the pavement which surface layer is SMA and the base is lean concrete should be used in rain concentration, heavy traffic and developed region of China. Subbase of asphalt pavement should be chosen in terms of different pavement structures considering moisture damage of pavement emphatically.