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Staff writer
Using an on-the-spot recycling method, construction crews are taking deteriorated asphalt on Route 17 and transforming it almost instantly into a new base for the road.
VDOT’s 4.8-mile Cold-in-Place Paving Project covers all four lanes of Route 17 from the James River Bridge to the Crittenden Bridge. The $5.3 million project is set to end June 2013.
Most of the paving work should be finished by this June, but crews will still work on crossovers and tie-ins at junctions with businesses and subdivisions as well as rumble strips and guardrails, said Project Manager James Poff.
In the cold-in-place paving process, one or two “recyclers,” also known as “reclaimers,” mill, stabilize and replace the asphalt in a single pass.
The “cold” part of cold-in-place, which uses ambient air, distinguishes the process from another method that uses hotter temperatures, said Poff.
“The [recycler] we have is approximately 15-feet wide, and that large of a machine, I’ve been told, there’s only a couple in the United States,” Poff said.
To make the new base asphalt layer, crews remove five inches of existing asphalt, combine the old materials with an oil-based emulsion and lay the new mixture back on the same section of road.
“It’s like making a cake out there,” Poff said.
After the base is laid, they follow up with an intermediate layer and then a top layer. With the traditional method, the old road materials are trucked out and disposed of while new materials are brought in.
Switching to this new method saves time, money and the environment, said Poff....(Subscribe!)