FABAC accelerated loading test of bond between cement overlay and asphalt layers

Armelle Chabot (1) , Jean Maurice Balay (1) , Bertrand Pouteau (2) , François de Larrard (3)

1 LCPC/MSC - Division Matériaux et Structures de Chaussées
2 Eurovia Management
3 LCPC/DS - Direction scientifique

This paper focuses on an experimental mechanical study of the bond fatigue life of composite (concrete over asphalt) pavements. This in-situ experiments is based on the use of an accelerated pavements testing facility (FABAC fatigue device). With the support of the French cement industry, a pavement section similar to an Ultra Thin White-topping structure has been realized at the LCPC-Nantes Center. Vertical joints of plain concrete have been loaded up to one million cycles. A non destructive seismic method, COLIBRI device, has been used to follow the interface debounding. Combined with core observations, it is possible to propose the accelerated fatigue damage scenario of such a composite pavement. The bond as well as the layers has been damaged by fatigue. These damages depend on temperature conditions wheel positions and interface treatments. Specific modeling and laboratory fatigue tests are proposed to be developed to deepen the knowledge of these deteriorations.

Mots clés: debonding; pavement; BCOA; FABAC; Accelerated Pavement Testing; Composite Pavement; Cracking; Interface

Mots clés: FISSURATION; CHAUSSEE (CORPS DE); INTERFACE; TEMPERATURE; EQUIPEMENT; CHAUSSEE; BETON; MATERIAU COMPOSITE; ESSAI ACCELERE; ESSAI DE FATIGUE

Domaines: Mécanique des matériaux [physics.class-ph]

Armelle Chabot, Jean Maurice Balay, Bertrand Pouteau, François de Larrard. FABAC accelerated loading test of bond between cement overlay and asphalt layers. 6th RILEM International conference on cracking in pavements, Jun 2008, CHICAGO, United States. pp. 671-680. ⟨hal-00399985⟩