Applying a Proper Tack Coat

This article explains how to properly apply a tack coat on overlays of existing asphalt and Portland cement concrete pavement. Tack coats ensure bonding between hot mix asphalt (HMA) layers so that they do not slip over each other. The author points out the importance of the tack distributor which performs a variety of functions including heating the material, circulating it, and distributing it through the spray bar. It is important that the distributor can shoot a wide range of application rates, depending on requirements. The article also describes the correct way to set up the spray bar, and notes that the nozzles should be set at the same angle from the centerline of the spray bar.

• Authors:
  • Etnyre, Don
• Publication Date: 2008-11

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos;
• Pagination: pp 47-50
• Serial:
  • HMAT: Hot Mix Asphalt Technology
  • Volume: 13
  • Issue Number: 6
  • Publisher: National Asphalt Pavement Association (NAPA)

Subject/Index Terms

• TRT Terms: Asphalt concrete pavements; Hot mix asphalt; Overlays (Pavements); Portland cement concrete; Tack coats
• Subject Areas: Construction; Highways; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 01129800
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS, ATRI
• Created Date: May 29 2009 8:49AM