A 15-ton Caterpillar CS-5636C single-drum vibratory roller, operated in a static mode, then compacted the base material.
"They don't make their living on what they spend up front."Īfter the reclaimer-stabilizer completed its first pass, a Deere 670A motor grader followed to fine grade the reclaimed base material.
"Contractors like Gorman make their living on what they can produce," Graham said, speaking with a forthright Scottish accent. "The machine worked out well for us."Īccording to Skellie, other benefits of the machine are that it provides good visibility for the operator, it features a comfortable, covered cab and a sharp turning radius.Īlthough the up-front cost of the new Wirtgen machine can range from $432,000 to $451,000 with options, Wirtgen's Graham says the machine is cost effective if you consider life-cycle cost and its production capacity. "The machine's production rate can run anywhere from 30 fpm to 90 fpm," said Mark Gorman. At points during the project, the machine's production rate was measured at 94 fpm by Ron Graham, Wirtgen regional manager. " works like an animal," said Skellie, referring to the machine's pace on the job. The Wirtgen Type II bolt-on replaceable tooth holders used on the WR-2500 rotar also are used on the rotar of Gorman's CMI RS model reclaimer-stabilizer. With the project not yet completed, Skellie said that he had replaced two tooth holders and approximately 200 teeth. According to Skellie, the large stone rock was difficult to cut through when encountered, and occasionally a chunk could be seen in the path of the machine, but on the whole the machine was "taking out the stone." "There's a lot of rock ledge under the pavement," said Richard Perry, of the Town of Moriah Highway Department. In addition to pulverizing varying depths of asphalt, the project presented another challenge in what lay just beneath the aged pavement. "It gives you a thicker base course, and in this case, the town felt the reclaimed asphalt would improve the base." He added that in an ideal situation the company would try to pulverize to a depth twice the thickness of the pavement. "You want to bring up some of the base material," said Gorman. Gorman Bros.' Mark Gorman stressed that the project involved more than planning that the key to the project was the mixing of the reclaimed asphalt with the underlying base material. "I've had to keep raising and lowering the depth of cut." "We didn't know how deep it was at times," said Skellie. The machine demonstrated its flexibility by being able to adjust to the fluctuation in pavement depth. However, "going just deep enough" was a great deal more difficult than Skellie made it sound. "We're going just deep enough to get underneath the pavement," said Dave Skellie, the reclaimer-stabilizer operator for Gorman. Inc., Albany, N.Y., an 80-year-old emulsion manufacturer and paving contractor.
A new Wirtgen WR-2500 reclaimer-stabilizer was used on the project by the contractor, Gorman Bros. of asphalt pavement and base material on a quarter-mile stretch of Henrys Mill Road, a two-lane road, which runs through the heart of Moriah, as well as a third-of-a-mile section of an intersecting two-lane roadway. The 12,000-sq-yd project included the pulverization of 6-8 in. The process can be a cost saver because it allows the reuse of the old asphalt material without having to cart the material to a landfill or move the material off site to be stockpiled and reused at a later time. Later the new base material is either capped with a double chip seal or overlaid with hot-mix asphalt. The technique adds strength to the base and allows the reuse of the old pavement. The technique involves reclaiming the worn asphalt pavement, mixing it with a portion of the base and placing the mixed material in-situ. As Labor Day fast approached in late August, residents of the town were witness to cutting-edge recycling technology when two of the town's principal thoroughfares were rehabilitated using a cold in-place recycling technique. By: Larry FlynnAmid the peaceful backdrop of the calm fishing waters of Lake Champlain in upstate New York, the hum of construction equipment could be heard in the small lake-side town of Moriah.
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