Mechanistic Design of Foamed Bitumen Stabilised Pavement Bases

摘要: Foamed bitumen stabilised (FBS) materials as non-continuously bound pavement layers are being increasingly used globally in both new road base construction and rehabilitation of degraded pavements. However, the essential research on testing design methods FBS is still far from complete. In current practice, laboratory-derived fatigue criterion asphalt directly for materials. This paper critically discusses limitations test proposes a detailed bottom-up study characterisation flexural behaviour under laboratory field conditions. The numerical results obtained Circly computer program revealed that critical response standard axle loading below inner wheel along vehicle travel direction. analysis showed level interaction between axles various configurations increases with increasing layer thickness. Moreover, ratio maximum compressive stress divided by tensile (R) at bottom was determined to be less than 10% all thicknesses employed this study.