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With highways and paved roads around the world exhibiting surface defects in need of repair, utilizing an innovative road reconstruction process such as cold-in-place recycling (CIR) is a cost-effective and environmentally friendly alternative to more conventional methods of rebuilding asphalt roadways.

Coughlin Company, a Utah-based company providing milling, CIR, heavy hauling, pulverizing, and soil stabilization services throughout the Western United States, recently used the latest in CIR technology on a district maintenance contract project involving four different sites throughout the state of Nevada.

All four sites required the creation of a "crack barrier" between the existing roadbed and the new surface, and specifications stipulated that the existing roadbed was to be partially milled up, mixed with additives and placed back on the road.

The subbase created in this way has the ability to keep underlying base cracks from migrating to the surface. A final overlay of traditional hot mix was then applied after a curing period of approximately two weeks. The four Nevada sites were located on U.S. 93, S.R. 447, S.R.757, and U.S. 50.

CIR train

Coughlin employed the CIR "recycling train concept" consisting of tanker trucks, milling machines, crushing and screening units, mixers, pavers and rollers - all designed and integrated into one comprehensive operation.