O'Hare's busiest

摘要

Two of Wirtgen's largest cold mills-the W 2200 with 121/2-ft drums-kept a time-critical mill-and-fill runway resurfacing at one the world's busiest airports on schedule in fall 2007. Existing Runway 9R-27L has been Chicago O'Hare International Airport's second-longest runway. As part of a major airport expansion program, this runway is being lengthened, completely resurfaced and ultimately redesignated. Due to extremely heavy air-traffic loads, all reconstruction work was relegated to nighttime. "We are doing a mill and overlay in which whatever you grind has to be paved that night, with the runway open by 6 a.m.," said Bill Druggan, paving superintendent and project manager for Plote Construction Inc., Hoffman Estates, 111. The total length of the project was 152 ft wide x 9,180 lineal ft. "We typically grind about 12,300 sq yd per night and do a 3-in. grind and 3-in. overlay of about 2,100 tons of RAP in a five-hour period," Druggan said.