Structural Performance of Foamed Asphalt Base in a Full Depth Reclaimed and Sustainable Pavement

Environmental awareness and budgetary constraints in road construction rehabilitation require innovative at the same time environmentally friendly solutions favor of resource conservation, any type pavement intervention. In meantime, surface interventions severely deteriorated pavements are insufficient, increasing as such recycling potential existing materials Full Depth Reclamation (FDR). This study addresses efficiency an FDR process which recycled base course semi-rigid is stabilized with Foamed Asphalt (FA). The adverse effects FA curing, have a significant impact on evaluation, particularly early stages pavement’s life cycle, prompted conduct comprehensive testing campaign two different periods, shortly after five years thereafter. included nondestructive aforementioned periods using Ground Penetrating Radar (GPR) Falling Weight Deflectometer (FWD), facilitate structural evaluation base. Using collected data, principles Multi-Layer Elastic Theory (MLET) Genetic Algorithms (GA) used to investigate performance Both analysis tools captured strength increase second period, but increased variance modulus was observed mainly first test probably due curing effect. addition, GA showed advantage over other, more conventional for back-analysis stiffness, resulting interesting correlation deflection-based parameter reflecting condition layer. Overall, contributes development practical methodology suitable non-conventional sustainable structures.