Road rehabilitation in Connecticut: WR 240i meets the challenge quickly and reliably
Rafferty Fine Grading Inc. is a road rehabilitation specialist from the state of Connecticut. The company, which also operates in New England's neighboring states of Massachusetts, New Hampshire, Maine, Vermont and Rhode Island, performs a variety of tasks ranging from the fine grading of roadways to the complete rehabilitation of asphalt roads. Project schedules are always tight, says vice president Kurt Rafferty, describing the challenge facing his company: "But we have no problem keeping to them and achieving top-quality results with the new Wirtgen WR 240i cold recycler and soil stabilizer." The project in Torrington, northwest Connecticut, where Rafferty Fine Grading has been contracted to rehabilitate 17 roads with a total surface area of around 47 km2, is just such a case.
Torrington’s Pavement Management Program
The rehabilitation and repair work in Torrington are being planned in line with a strict "Pavement Management Program". All the roads are categorized according to an index specifying whether the service life is to be prolonged by sealing the road surface or whether the entire road is to be rehabilitated.
Work on supply lines is being carefully coordinated in Torrington to ensure that the repaired roads do not need to be drilled up soon after completion. "The drains and water pipes on Lois Street had already been renewed and the gas company had also completed work there. So all the conditions for the rehabilitation work had been met," explained Rafferty.
Time is money – Road recycling in two days
Perfect recycling is essential if rehabilitation work is to be completed fast. This is where the Wirtgen WR 240i comes in. "The unique thing about this machine is the way it can mix large and small fractions perfectly and deliver a homogenous final product. I know of no other machine with a comparable milling and mixing rotor. With other machines, material failures often occur at this stage in the process: The larger fractions accumulate in the lower layer while the fine ones rise to the top. Were we to then remove the surplus material from the road, we would end up removing all the good material, leaving behind stones, fragments and large fractions. The surface would be uneven," said the vice president, explaining why he elected to use the WR 240i.
The variable mixing chamber guarantees a top performance, excellent mixing results and low wear at every working depth. "We had the choice of milling off the roadway or treating the surface, but we consciously decided to reuse 100% of the material from the old, damaged road. The WR 240i enabled us to recycle the road over the entire working depth and produce a construction material which, after the addition of water or lime, laid an ideal basis for the new asphalt course," said Rafferty. This prepares the ground perfectly for leveling or profiling with a grader. A Hamm roller then precompacts the road before the new asphalt pavement is laid.
Advanced Wirtgen machinery improves the chances of winning tenders
Apart from the resource-saving process, Kurt Rafferty believes that the modern machine technology – such as the automatic drum turning device for positioning the drum with centimeter-precision at the push of a button and the fuel-saving diesel engine of the WR 240i – offers his company additional benefits: "We are involved in various 'green initiatives' across the nation. Many of the states in which we operate require compliance with the strict US Tier 4i emissions standard. The WR 240i enables us to meet our own standards while also fulfilling the emissions standards demanded of us. The combined injection system for water and bitumen emulsion also is indispensable when working in various states. The WR 240i hence gives us a decisive competitive edge."
The Wirtgen Group Service is the icing on the cake
In the vice president's view, this also is true of the Wirtgen Group's worldwide service. For instance, a regional dealer is directly available to deal with all product and service issues and service technicians trained at Wirtgen's headquarters can be on site with any spare parts in next to no time. "We can call Germany or Wirtgen America at any time and get speedy assistance. A high machine availability is crucial in our business. We can't afford any downtimes. So it's reassuring to know that we are just a call away from a solution," said Rafferty.
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