MILLING AND PLANING OF FLEXIBLE PAVEMENT

In 1975, a 38-mm (1.5-in.) layer of asphalt concrete was removed from 12 km (7.5 miles) of four-lane divided pavement using three different methods: hot milling, cold milling, and hot planing. The site, NY-5 between Albany and Schenectady, is a major thoroughfare with an average annual daily traffic volume of 28,000 to 50,000 vehicles. Its curb and expensive color-contrasted median made removing and replacing the wearing course more economical than raising curbs and manholes and reconstructing the median. Air and noise pollution were monitored, and neither exceeded industrial or construction limits. Tests on the asphalt before and after removal showed virtually no effect on its properties, although the three machines had very different operating characteristics. Their effective removal widths ranged from 1.5 to 3.7 m (5 go 12 ft), the depths from 10 to the full 38 mm (0.4 to 1.5 in.) in one pass, and the forward speeds from 3.1 to 12.2 m/min (10 to 40 ft/min). The net result was an effective removal rate--full depth per 10-h day--of 1505 to 5936 sq m (1800 to 7100 sq yd). All three machines provided efficient means of removing old asphalt, but several factors must be considered before selecting any of the processes for a given location. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 14-20
  • Monograph Title: Evaluating Bridge Structures, Pavement Maintenance, Roadside Management, Deicing Salts, Transport of Hazardous Materials
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00184725
  • Record Type: Publication
  • ISBN: 0309026768
  • Report/Paper Numbers: HS-024 782
  • Files: TRIS, TRB
  • Created Date: Dec 29 1978 12:00AM