In 1975, a 1 1/2-in. layer of asphalt concrete was removed from 7 1/2 miles of 4-lane divided pavement using three different methods -- hot milling, cold milling, and hot planing. The site, Rte 5 between Albany and Schenectady, is a major thoroughfare with an AADT of 28,000 to 50,000 vehicles. Because it is curbed and has a relatively expensive color-contrasted median, removal and replacement of the wearing course appeared more economical than raising curbs, manholes, etc., and reconstructing the median. During the work, both air and noise pollution were monitored and neither exceeded industrial or construction limits. Tests run on the asphalt before and after removal showed virtually no effect on its properties. The three machines were quite different in configuration and operating characteristics. Their effective width of removal ranged from 5 to 12 ft, the depth from 3/8 to the full 1 1/2 in. in one pass, and the forward speed from 10 to 40 ft/min. The net result was an effective removal rate -- full-depth per 10-hr day -- of 1800 to 7100 sq. yds. These rates, however, were not entirely indicative of each machine's relative ability to remove asphalt in a given location. The length of the following equipment train to remove the milled or planed material, and the amount of hand removal necessary around manholes, drop inlets, and traffic-counting loops, both increased with the faster machines. The general conclusion was that all three machines provided efficient means of removing old asphalt, but that several factors must be considered before selecting any of the processes for a given location.

Media Info

  • Pagination: 34 p.

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Filing Info

  • Accession Number: 00169777
  • Record Type: Publication
  • Report/Paper Numbers: MYSDOT-ERD-77-RR-44
  • Created Date: Mar 14 2003 12:00AM