DOUBLE STRING-LINE USED TO MAINTAIN CLOSE GRADE TOLERANCES IN ASPHALT PAVING

For some time now, the Federal Aviation Administration has been successfully utilizing a "double string-line" method to maintain close control of both the longitudinal and transverse grades of paving on airport surfaces. The procedures is also applicable for paving other large areas such as shopping mall parking lots. The method ensures not only a smoother surface, but one less apt to develop "bird baths" or other surface drainage problems and it also permits the use of flatter grades. The procedures requires the use of a double string-line on the first paving lane placed, and a short ski joint matcher and a single string-line on all subsequnet lanes. One of the projects constructed utilizing this procedure was an overlay project at Bush Field, Augusta, Georgia, requiring the placement of approximately 22,700 tonnes (25,000) of bituminous surface course on two runways, 46m (50 ft) wide, the two main taxiways and connecting taxiways all 23m (75 ft) wide. There was concern at the onset that the additional expense involved in the technique would not be justified. Also of concern was the ability of local contractors do an acceptable job with an unfamiliar procedure. These concerns proved groundless. The authors now are convinced that this is the best system of producing quality asphalt surfaces on airports. (Author)

  • Corporate Authors:

    Asphalt Institute

    2696 Research Park Drive
    Lexington, KY  United States  40511-8480
  • Authors:
    • Manning, J H
  • Publication Date: 1985-5

Media Info

  • Pagination: v.p.
  • Serial:
    • Asphaltnews
    • Volume: 8
    • Issue Number: 2
    • Publisher: Asphalt Institute

Subject/Index Terms

Filing Info

  • Accession Number: 00395685
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 31 1985 12:00AM