Full-depth reclamation (FDR) with cement is a procedure where failed
asphalt pavements are pulverized and reclaimed, using cement to stabilize the
recycled materials and create a new pavement base. This cement-stabilized base
is then surfaced to provide a new, long-lasting pavement structure. This
research report presents the detailed findings of an extensive investigation
into the design, construction, testing, and long-term performance of failed
flexible pavements rehabilitated through FDR using portland cement. Objectives
of this investigation included evaluating the in-service long-term performance
of roads rehabilitated using FDR with cement; evaluating the design protocol for
field and laboratory investigation for FDR with cement pavements; determining
what problems agencies encounter by implementing this rehabilitation technique;
and developing guidelines for successful implementation. The actual field
performance of more than 75 projects in eight states was evaluated. The average
project age was 9 years, and the oldest was 26 years.
Overall, the performance of the FDR with cement projects has been excellent. There was no evidence of premature structural failure in any of the sections. In addition, the economics of the process has helped the agencies reconstruct 50-100% more projects than the conventional remove and replace methods.