VIEWS: 14 PAGES: 6 CATEGORY: Engineering & Energy POSTED ON: 6/11/2010
In [Darren Coughlin]'s CIR train, a Roadtec 950-hp RX-900 cold planer provided the train's propulsion, towing a RT-500 cold recycler and a nurse tank for the emulsions. It also pushed a water truck and a slurry tanker that are always with the train.
PAVEMENT PRESERVATION Coughlin provides CIR solution New cold in-place recycling technology put to the test on Nevada maintenance project W ith highways and throughout the Western United ing base cracks from migrating paved roads around States, recently used the latest in to the surface. A final overlay the world exhibiting CIR technology on a district main- of traditional hot mix was then surface defects in tenance contract project involving applied after a curing period of need of repair, utiliz- four different sites throughout the approximately two weeks. The ing an innovative road reconstruc- state of Nevada. four Nevada sites were located tion process such as cold-in-place All four sites required the cre- on U.S. 93, S.R. 447, S.R.757, and recycling (CIR) is a cost-effective ation of a “crack barrier” between U.S. 50. and environmentally friendly the existing roadbed and the new alternative to more conventional surface, and specifications stipu- CIR train methods of rebuilding asphalt lated that the existing roadbed Coughlin employed the CIR roadways. was to be partially milled up, “recycling train concept” con- Coughlin Company, a Utah- mixed with additives and placed sisting of tanker trucks, milling based company providing mill- back on the road. machines, crushing and screening ing, CIR, heavy hauling, pulveriz- The subbase created in this way units, mixers, pavers and rollers ing, and soil stabilization services has the ability to keep underly- — all designed and integrated into 46 asphalt contractor • March 2009 one comprehensive operation. A precut was In Coughlin’s CIR train, a Road- made on some portions of tec 950-hp RX-900 cold planer pro- the project vided the train’s propulsion, tow- where a width ing a RT-500 cold recycler and a
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