M
aterials used to build roads
are some of the most re-
cycled and reused materials
worldwide. So, it's no surprise that a
process that reworks the asphalt and
cement from an existing roadway
is growing as a quick and low cost
solution for improved pavements.
This process – full-depth reclama-
tion (FDR) – pulverizes an existing
pavement and base materials, mix-
ing the resulting mass with water
and cement, and then repaving it
as a base that can be finished with
a concrete or asphalt overlay. It's
a process that's been around for
about 30 years.
FDR was once a laborious task,
involving multiple passes, but now
a recycler or reclaimer can just
make one pass and pulverize the
EquipmentWorld.com | December 2016
45
road science
|
by Chris Hill
|
ChrisHill@randallreilly.com
Full-depth reclamation makes
old roadways better than new
RECYCLING:
ROAD
The Virginia DOT using full-depth
reclamation on a section of I-81 near
Staunton, Virginia, as part of a reha-
bilitation project.
Image:
Brian
K.
Diefenderfer,
Virginia
Center
for
Transportation
Innovation
&
Research
