ABSTRACT
In order to investigate the use of recycled asphalt pavements and crushed concrete as unbound road materials, a test road was constructed at the closed-down Oslo airport Fornebu late 1999. Three different “secondary” materials are tried out as subbase and base courses; crushed asphalt, crushed concrete and a 50/50 mix crushed asphalt/crushed concrete. Comparisons with standard crushed rock (subbase) and asphalt (base) materials are also included. The road is now being followed up by frequent field measurements (rutting, evenness, FWD and distress registrations). Parallel to the field investigations, an extensive laboratory program is being carried out on the same materials. Preliminary results are very promising regarding stiffness and deformation properties. Both rut measurements in field and triaxial tests in the laboratory are in favour of the secondary materials. The investigations will continue through 2002.
