ABSTRACT
The performance of recycling and rehabilitation measures requires optimization. Bitumen Stabilised Material BSM technology in particular has needed improvements in mix design and pavement design procedures, for both foamed bitumen or emulsified bitumen binders. This study covers recent developments in mix design test methods including specimen preparation linked to field compaction, conditioning to simulate in-service curing, and implementation of triaxial testing using new apparatus to evaluate the BSM shear parameters Cohesion C and Internal Angle of Friction ϕ. Research has shown that the shear properties are closely linked to the performance of BSMs, which has been implemented in more than 200 mix designs worldwide. Several case studies in the Middle East are covered that provide evidence of in-service performance of BSMs in Saudi Arabia, as well as lessons learned. Cold recycling technology has been shown to breathe new life into a road pavement, providing sustainable infrastructure for a further design period.
