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.
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Corporate Authors:
McGraw-Hill, Incorporated
330 West 42nd Street
New York, NY United States 10036 - Publication Date: 1975-10
Media Info
- Features: Figures;
- Pagination: p. 33
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Serial:
- Construction Methods and Equipment
- Volume: 57
- Issue Number: 10
- Publisher: McGraw-Hill, Incorporated
Subject/Index Terms
- TRT Terms: Aerodynamic lift; Airport runways; Asphalt; Calcium oxide; Compactors; Costs; Hot mix asphalt; Mineral deposits; Pavements; Rocks; Sand; Strength of materials; Thickness; Waste disposal
- Uncontrolled Terms: Lifts; Pavement thickness
- Old TRIS Terms: Windrows
- Subject Areas: Construction; Finance; Geotechnology; Highways; Pavements;
Filing Info
- Accession Number: 00127944
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 21 1976 12:00AM