Course description
In Tack Coats for Asphalt Pavement, you'll learn ...
- The purpose of tack coats for asphalt pavement
- Pavement distresses that can result from bad tack coat application
- The distinction between residual rate and application rate
- Tack coat classifications and materials
Overview
Credit: 2 PDH
Length: 28 pages
A vital, but sometimes overlooked component of an asphalt pavement is the bond strength between asphalt pavement layers. Tack coat is a sprayed application of an asphalt binder between layers of new asphalt concrete; or upon an existing asphalt or Portland cement concrete pavement prior to an asphalt overlay. This thin membrane of asphalt binder provides the bond between the layers, creating a monolithic structure which performs as a unit as opposed to unbound, independent layers.
Poor tack coat application results in poor bonding of the new asphalt layer to the pavement beneath it. Typical pavement distresses due to bad tack coat application are slippage cracks and delamination, although more common failures like potholes and fatigue cracking are also common. Yet, despite these dire consequences, it is still common for both contractors and agencies to neglect tack coat.
In this course, you’ll learn correct methods for applying tack coat, as well as how to write tack coat into your contracts. This course is intended for civil engineers who manage asphalt pavement projects in the transportation sector, specifically light and heavy vehicles.
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Who should attend?
Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 15 questions. PDH credits are not awarded until the course is completed and quiz is passed.
Training content
This course teaches the following specific knowledge and skills:
- Main materials used for tack coats: emulsions and PG binders
- Converting between residual rate and application rate
- Methods to verify application rate in the field: volume, weight, and direct measurement
- The distributor truck and its key components
- Examples of tack coat mistakes during construction
- Pavement failures due to bad tack coating
- How to write tack coat into the contract
Costs
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