ASPHALT/LIMES AND WINDROW LINES ADD STRENGTH, REDUCE COSTS ON RUNWAY

The addition of crushed lime to asphalt and placement of hot mix from windrows in a runway paving project helped to add strength and shorten job time. In addition to approximately 6 percent asphalt and 2 percent lime content, the mix included about 35 percent rock with 3/4 - inch maximum size; the balance was sand. To quicken the pace, hotmix asphalt was placed in windrows directly ahead of a paver. A into the pavers hopper at a constant rate. Runway thickness varies from 8 to 14 inches. The 50-ft-wide runways were laid in fine 10-ft. widths. The mix was placed at the nearly constant rate of 200 tph. Material was hauled in double-trailer bottom dumps, each with a combined capacity of about 25 tons. Eight such doubles kept the paver operating continuously. Windrows ran 3 cu. ft./lin. ft., forming a triangular heap 14 to 16 inches high and 3 to 4 ft. wide at the base. Low pavement lifts were about 3.5 inches deep. Each of the last two lifts were 2 inches deep. Depth was controlled automatically by a ski-like device at the right side of the paver. Four compactors were used: two 8-12 ton Hyster steel rollers; one Hyster 20-ton rubber-tired unit; and one Rex 5-8 ton roller.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 1975-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00127944
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 21 1976 12:00AM