HighwayContractor
The Pavement Recycling Systems train with a Cat PR 1000 milling
machine and a CRMX 2 mobile recycler from Nesbitt Contracting.
Wirtgen KMA 220 portable recycling plant, serving as a
stationary unit at an on-site recycling station. With the
cold central plant process, the asphalt is first milled, and
then hauled to the nearby recycling plant where the material is crushed, sized and re-engineered with asphalt
emulsion. The recycled asphalt is then hauled back to the
road for placement through a conventional asphalt paving
process and a paver spreads it back into place. For those
two projects, the county estimated that it racked up savings of $650,000 compared to conventional hot mix asphalt. What's more, the greenhouse gas emissions savings
on the two projects reached 360 tons of carbon dioxide
equivalency.
"One of the huge benefits of CIR – besides obviously the greenhouse gas reductions – is the cost savings
compared to conventional hot mix asphalt," says Kelley.
"In addition, the truck traffic required to haul the RAP
away from the project site and the truck traffic needed
to import the hot mix asphalt is eliminated reducing
the amount of time that you impact traffic by one-third
of the time that it takes you to do hot mix applications.
Because the county has a lot of roads in remote locations,
significant savings can be achieved by eliminating hot-mix
hauling.
"The train just keeps going all day, and you to open the
road to traffic within two to three hours resulting in less
disruption to the motoring public," says Kelley. "The overall
benefit that cold asphalt recycling provides makes this treatment process an integral strategy in maintaining our road
network in LA County."
Text INFO to 205-289-3789 or visit www.betterroads.com/info
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July 2013 Better Roads
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