Development of a Guideline for the Selection of Tack Coats in South Dakota

Several types of tack coats are used in South Dakota for asphalt pavement construction projects. This study was conducted to determine the effects of application rate, surface type, texture, moisture, and freeze-thaw on the early-age performance of three tack coat emulsions applied on four surface types in dry conditions and after moisture-conditioning. The specimens’ early-age interlayer shear strength (ISS) was measured and used to study the effectiveness of different tack coat types applied at different rates on each surface texture type. The effects of freeze-thaw cycles on the ISS values were examined on moisture-conditioned specimens. It was found that the samples prepared using tack coats having a harder binder grade exhibited higher early-age ISS values at low application rates compared with those prepared using a polymer-modified tack coat. In addition, it was found that applying tack coats resulted in a reduction in early-age ISS values for specimens prepared by using different textures of hot mix asphalt (HMA) surfaces. Moisture conditioning resulted in a considerable reduction in the specimens’ ISS values consisting of an HMA layer compacted on a grooved Portland cement concrete (PCC) layer using different tack coats. The polymer-modified tack coat was the most effective in reducing moisture’s effect on the ISS values.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=1088
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/66365
• Summary URL:
  https://rosap.ntl.bts.gov/view/dot/67952
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  South Dakota State University, Brookings

  Department of Civil and Environmental Engineering
  Brookings, SD  United States  57007

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Authors:
  • Ghabchi, Rouzbeh
  • Dharmarathna, Chamika Prashan
• Publication Date: 2022-7

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 54p

Subject/Index Terms

• TRT Terms: Freeze thaw durability; Guidelines; Shear strength; Tack coats
• Geographic Terms: South Dakota
• Subject Areas: Construction; Highways; Pavements;

Filing Info

• Accession Number: 01855174
• Record Type: Publication
• Report/Paper Numbers: MPC-22-468
• Contract Numbers: MPC-522
• Files: UTC, NTL, TRIS, ATRI, USDOT
• Created Date: Aug 22 2022 9:35AM