PAVING: ULTRA-THIN CONCRETE IS TESTED

An ultra-thin concrete pavement type known as whitetopping - a contrast to the asphalt-related term blacktop - is undergoing its biggest application ever in Mississippi. Asphalt overlay was replaced by the white topping on a 4,000-ft (1219-m) stretch along the outer lane of Interstate 20. One 2,000-ft (610-m) long section is receiving concrete with .02-in (.63-mm) thick, 2-in (50-mm) long fibers manufactured by 3M. Another 1,000 ft (305 m) will contain a thinner, more conventional fibrillated 3/4-in (18.7-mm) long fibers, and the remainder will be plain concrete. The tests include varying joint spacings of sections from 6 to 40 ft (1.82 to 12.19 m) and topping thicknesses of 4 to 6 in (101 to 152 mm). The 3M fibers are twice as expensive as the fibrillated concrete but require less application. In a year, DOT will decide which type to test on a larger scale; either way, officials believe whitetopping will be cost-competitive to asphalt.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08919526
• Corporate Authors:

  McGraw-Hill, Incorporated

  330 West 42nd Street
  New York, NY  United States  10036
• Publication Date: 1997-9-8

Language

• English

Media Info

• Pagination: p. 14
• Serial:
  • ENR
  • Volume: 239
  • Issue Number: 10
  • Publisher: McGraw-Hill, Incorporated
  • ISSN: 0891-9526

Subject/Index Terms

• TRT Terms: Concrete; Fiber reinforced concrete; Pavement layers; Pavement maintenance; Performance evaluations; Thin films; Whitetopping
• Uncontrolled Terms: Thin layers
• Old TRIS Terms: Concrete composition
• Subject Areas: Construction; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00740417
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 16 1997 12:00AM