Webinar Series

Expected Outcomes

• Learn history and rationale behind AASHTO M 320 and AASHTO M 332.
• Learn differences, nomenclature differences, and improvements between AASHTO specifications.
• Consider possible implementation barriers and implementation steps.

Expected Outcomes

• Gain knowledge on pneumatic tire composition and get an overview of the waste tire issue and common recycle or reuse opportunities to include asphalt modification.
• Gain knowledge on the historical use of GTR in asphalt paving applications.
• Learn the different processing technologies used to modify asphalt binders and asphalt mixtures with GTR.
• Learn potentials for specification and testing of GTR modified asphalt binders and mixtures.
• Learn potential issues with use of GTR in modified asphalt binders and mixtures.

Expected Outcomes

• Learn to identify potential quality assurance engineering and acceptance risks.
• Gain knowledge in identifying techniques to mitigate quality assurance risks.
• Understand the principles based on a State DOT example.

Expected Outcomes

• Understanding of the impact of in-place density on asphalt pavement performance and life cycle cost.
• Awareness of density demonstration projects conducted across the U.S. to identify techniques and tools for improving density.
• Awareness of example State DOT in-place density specifications.
• Understanding of how average density and variability of density impact percent within limits (PWL).
• Awareness of changes related to density that State DOTs made to specifications and acceptance plans based on observations from demonstration projects.

Expected Outcomes

• Recognizing that obstacles to achieving in-place mat density can occur.
• Awareness of potential obstacles to achieving in-place mat density associated with materials, pavement structure and construction operations.
• Recognition of practices for planning, design and mixture selection for improved joint performance.
• Identification of positive longitudinal joint construction practices and specifying and testing joint density.

Expected outcomes:

• Familiarity with techniques employed by State DOTs for using high RAP in asphalt mixtures.
• An understanding of the benefits State DOTs have observed with the high RAP use.
• Exposure to the criteria State DOTs use when allowing high RAP mixtures. 
• Exposure to methods State DOTs use to get additional virgin asphalt binder in mixtures with high RAP contents. 
• Awareness of what participating State DOTs identified as important implementation considerations for high RAP use.

Expected Outcomes

• To be determined.