Asphalt Pavement 101: Tack Coats, Bond Strengths and Pavement Performance On-Demand Webinar
Topic Description:
Tack coats are used to bond pavement layers together, and if the proper materials are used, handled and applied correctly, they will provide an excellent bond between layers, which will lead to good long-term performance of the pavement. The importance of properly bonded pavement layers cannot be overstated, and a thorough understanding of tacking materials and operations is key to a successful paving project.
This webinar will focus on the basics of tack coats, including:
- Why tack coats are important;
- Types of materials that are commonly used for tack, including emulsified asphalts, hot applied tack materials, and reduced tracking materials;
- Typical construction practices for tacking, such as application rates, temperatures, and surface cleanliness;
- Tack tracking – causes and solutions;
- Testing and acceptance of tack coats; and
- Bond strength testing
Key Takeaways:
- Information on the basic materials used for tacking, including asphalt emulsions, reduced tracking tack coats, and hot applied materials.
- Good construction practices with respect to tacking operations
- Information on the basic causes of tracking and the best methods of addressing these problems.
- Knowledge of basic bond strength testing
Presenter:
Jim Musselman, P.E., National Center for Asphalt Technology (NCAT)
Additional Resources
Asphalt Pavement 101: Tack Coats, Bond Strengths and Pavement Performance
Missouri Standards Specification for Highway Construction – Section 407 Tack Coat – Click Here
NCAT Evaluation of Bond Strength Between Pavement Layers (Report 05-08) – Click Here
NCAT Methods for Addressing Tack Tracking (Report 20-06) – Click Here
NAPA Best Practices for Emulsion Tack Coats – Click Here
NAPA Agency Guidelines for Addressing Tack Tracking – Click Here
NCHRP Synthesis 516, Tack Coat Specifications, Materials and Construction Practices – Click Here
FHWA, Tack Coat Best Practices (Tech Brief) – Click Here