Webinar series
The Asphalt | Innovate | Enlighten | Implement (AIEI) webinar series (formerly DAPT webinar series) shares current information and implementation aspects on topics including ground tire rubber, quality assurance, reclaimed asphalt shingles and more. The webinars are moderated by the Federal Highway Administration (FHWA) and hosted by the University of Nevada, Reno with open access. Participants are encouraged to participate in Q&A sessions and are eligible for professional development hours/continuing education units (PDH/CEU). The webinars are developed under the FHWA-University of Nevada, Reno cooperative agreement, “Development and Deployment of Innovative Asphalt Pavement Technologies.”
Learn more about the AIEI webinar series (formerly DAPT webinar series).
Asphalt | Innovate | Enlighten | Implement (AIEI) webinars
Below find upcoming webinars and webinars on-demand.
Past webinars (available on-demand)
Expected Outcomes
- Understanding how mixture composition affects mix performance as measured by a variety of laboratory tests.
- Learn how binder properties, including PG grade and polymer modification, enhance mixture rut resistance and fatigue and fracture performance.
- Predict how increases in binder content will affect rut resistance and fatigue life as measured in laboratory tests.
- How to adjust binder gradation and air void content to reduce mixture permeability.
- Understanding potential limitations of some laboratory fracture tests.
Related Publication: A Manual for Design of Hot-Mix Asphalt with Commentary (2011)
Related Publication: Modification of the Resistivity-Rutting Model to Use Recoverable Creep Compliance
Webinar Link: Adjusting Asphalt Concrete Mix Designs to Optimize Laboratory Performance
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.
Related publication: Asphalt Materials Quality Assurance Practices
Webinar link: Asphalt Materials Quality Assurance Practices
Expected Outcomes
- Gain limited perspective of how GTR is used to modify asphalt binders.
- Gain overview knowledge of the primary types of GTR modified asphalt binders used in asphalt mixtures.
- Receive a historical perspective of use of GTR modified asphalt binders used in asphalt mixtures.
- Practical knowledge/considerations in mix design of asphalt mixtures containing GTR modified asphalt binders.
- Balanced mix design (BMD) considerations for mixtures containing GTR modified asphalt binders.
Related publication: Recycled Tire Rubber – Hybrid GTR Binders and Dry Added GTR – How to use them in Asphalt Pavement Mixtures
Related publication: Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements
Webinar link: Recycled Tire Rubber – Hybrid GTR Binders and Dry Added GTR – How to use them in Asphalt Pavement Mixtures
Expected outcomes:
- Recognize techniques and common practices to reduce asphalt pavement carbon footprint
- Awareness of short-term or long-term strategies to reduce carbon footprint
- Recognize stakeholders’ priorities and opportunities to reduce asphalt pavement carbon footprint
Related publication: Tech Brief: Asphalt Pavement Carbon Footprint Reduction Workshop
Webinar link: Asphalt Pavement Carbon Footprint Reduction Workshop
Expected outcomes:
- Recognizing the different available asphalt pavement recycling techniques
- Recognizing the benefits of using recycling techniques
- Understanding how to quantify cost, performance and sustainable benefits of recycling techniques
- Understanding methodologies for using asphalt pavement recycling techniques
- Awareness of successful practices and lessons learned by select agencies
Related publication: Tech Brief: Asphalt Pavement Recycling Technologies
Related publication: Cold Asphalt and Hot In-place Asphalt Recycling Technologies
Webinar link: DAPT series - Practices and Lessons Learned For Cold and Hot In-place Recycling
BMD Implementation Plan | Available on-demand
Tim Aschenbrener and Derek Nener-Plante will discuss the importance of and how to create an effective implementation plan for balanced mix design (BMD). Topics will cover essential actions, from gaining internal and external support to mapping tasks and timelines, with insights from lead states and actionable examples for positive practices.
Implementation
Validation for BMD | Available on demand
Tim Aschenbrener and Derek Nener-Plante will discuss the importance of validation to the responsible implementation of balanced mix design (BMD). Validation is key to establishing proper criteria. The reasons for conducting validation will be presented as well as examples of approaches used successfully by agencies.
Validation
BMD Specimen Fabrication | Available on demand
Derek Nener-Plante, Tim Aschenbrener and Elie Hajj will discuss key items learned across the country on the topic of specimen fabrication for balanced mix design (BMD). Specimen fabrication is an important consideration for laboratories conducting BMD testing to reduce variability. Topics shall include considerations for lab operations to reduce variability and the latest on efforts to quantify effects of lag and Dell time on BMD results.
Specimen Fabrication
BMD Testing Conditions: Aging and Test Temperatures | Available on demand
Tim Aschenbrener and Derek Nener-Plante will discuss two critical considerations in balanced mix design (BMD) testing: mixture aging and testing temperature. Both parameters can be tailored by agencies to better reflect local environmental conditions and material properties. The presentation will address the role of aging in assessing cracking performance, explore different aging protocols and examine how testing temperature affects rutting evaluations.
Testing Conditions
BMD in Quality Assurance: Important Considerations | Available on demand
Tim Aschenbrener and Derek Nener-Plante will explore key considerations for incorporating balanced mix design (BMD) testing into production and quality assurance processes. While many agencies initially implement BMD through mix design specifications, there is increasing interest in expanding its application to quality assurance. This session will highlight the primary challenges and factors agencies should consider when planning for BMD integration throughout the project lifecycle.
Considerations for Quality Assurance
Expected outcomes:
- Understanding state motivations for considering BMD approaches
- Understanding role of sustainability in BMD practice
- Awareness of critical challenges faced by state DOTs in implementing BMD procedure
- Identifying key takeaways and needs for advancing the implementation of BMD
Webinar link: http://www.kaltura.com/tiny/glod6
Related publications:
- 2023 Midwest Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary
- 2023 Rocky Mountain West Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary
- 2023 Northeast Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary
- 2023 North Central Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary
- 2023 Southeast Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary
Expected outcomes:
- Recognizing the various products from the FHWA-UNR cooperative agreement
- Understanding the link between the DDIAPT products and FHWA/USDOT strategic plans
- Recognizing the impact of DDIAPT products on key performance indicators, strategic objectives and strategic goals
- Recognizing the number of agencies and stakeholders benefitting from the DDIAPT products
Related publications: In press
Webinar link: Overall Review and Impact on Strategic Goals
Expected Outcomes
- Understanding the role of ΔTc as an indicator of the effect of aging and additives on the asphalt rheology
- Awareness for responsible deployment of the ΔTc as a specification parameter
- Learning about possible implementation barriers and implementation steps
Related publication: Tech brief: Delta tc binder specification parameter
Webinar link: DAPT Webinar on Delta Tc (ΔTc Binder Specification Parameter
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.
Related publication: Enhanced In-place Density: Demonstration Project One-Pager
Related publication: Tech Brief 1: Density Demonstration Projects and Related Specifications
Related publication: Tech Brief 2: Techniques and Tools for Improving Density
Webinar link: Demonstration Projects, Related Specifications, and Techniques for Improving Density
Expected Outcomes
- Understand the why and overall benefits of BMD.
- Recognize the overall planning and coordination effort associated with the implementation process of BMD.
- Identify the tasks that need to be completed for the development and implementation of BMD.
- Recognize successful key state DOTs practices and experiences related to BMD.
- Recognize available external technical information and support.
Related publication: Tech brief: Balanced Asphalt Mix Design: Eight Tasks for Implementation
Related publication: Positive Practices, Lessons Learned and Challenges When Implementing Balanced Design of Asphalt Mixes: Site Visits
Webinar link: DAPT Series - Eight Tasks Towards Implementation of Balanced Mix Design for Asphalt Mixtures
Expected Outcomes
- Learn about general considerations for adjusting asphalt mixtures.
- Gain knowledge about industry practices for improving rutting and fatigue resistance of asphalt mixtures.
- Make informed decisions on how to adjust asphalt mixtures to satisfy different mechanical test criterion.
- Recognize potential emission reductions from use of balanced asphalt mix design.
Related publication: Tech Brief: Adjustment of Asphalt Mix Design/Job Mix Formula to Satisfy Mechanical Test Properties
Webinar link: Industry Practices and Suggestions for Adjusting Asphalt Mixtures to Meet Balanced Mix Design (BMD) Specifications
Expected Outcomes
- Explain the use of the paver-mounted thermal profiler (PMTP) for quality control of an asphalt mat within a (quality assurance) QA program.
- Identify the advantages and limitations of the PMTP for use in QA.
- Describe the challenges in deploying the PMTP for QA.
- Explain the use of the dielectric profiling system (DPS) for quality control or acceptance of an asphalt mat within a QA program.
- Identify the advantages and limitations of the DPS for use in QA.
- Describe the challenges in deploying the DPS for QA.
- Explain the use of IC for quality control or acceptance of an asphalt mat within a QA program.
- Identify the advantages and limitations of the IC for use in QA.
- Describe the challenges in deploying the DPS for QA.
Related publication: A Practice for Including Intelligent Construction Equipment in Quality Assurance Programs
Webinar link: A Practice for Including Intelligent Construction Equipment in a Quality Assurance Program
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
Related Publication: Multiple Stress Creep and Recovery (MSCR) Implementation and Transition publications
Webinar link: DAPT series - Multiple Stress Creep and Recovery (MSCR) Implementation and Transition
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.
Related publication: Enhanced In-place Density: Demonstration Project One-Pager
Related publication: Tech Brief 3: Overcoming Obstacles to Achieving Density
Related publication: Tech Brief 4: Improving Longitudinal Joint Performance
Webinar link: Overcoming Obstacles to Achieve Density and Improving Longitudinal Joint Density
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.
Related publication: Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements
Webinar link: Resource Responsible Use of Recycled Tire Rubber in Asphalt Pavements
Expected outcomes:
- Awareness of available qualitative and quantitative methods to detect presence of phosphorus in asphalt binders
- Awareness of available qualitative and quantitative methods to detect presence of calcium, copper, molybdenum, phosphorus and zinc in asphalt binders
- Understanding of how phosphorus might indicate the presence and amount of PPA in asphalt binders
- Understanding of what elements might indicate the presence and amount of REOB in asphalt binders
Related publication: Responsible Use of Re-Refined Engine Oil Bottoms (REOB)
Webinar link: Responsible Use of Re-refined Engine Oil Bottoms & Polyphosphoric Acid Modification of Asphalt Binders
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.
Related publication: Tech Brief: Resource Responsible Use of Reclaimed Asphalt Pavement in Asphalt Mixture
Related publication: Successful Use of Reclaimed Asphalt Pavement in Asphalt Mixtures
Webinar Link: Resource Responsible Use of High RAP (up to 50%) Asphalt Mixtures
Expected Outcomes
- List some of the advances made in the design and construction of SMA mixtures and their impact on performance and cost.
- Explain and demonstrate use of the Balanced Mix Design process and tests applied to SMA mixtures.
- Discuss use and application of SMA mixtures simulated in mechanistic-empirical pavement design procedures.
Related publication: Tech Brief: Advances in the Design, Production and Constructions of Stone Matrix Asphalt (SMA)
Webinar link: SMA Mixtures: Advances in Design and Construction
Expected Outcomes
- Familiarity with techniques employed by state DOTs for using RAS in asphalt mixtures.
- An understanding criteria state DOTs use when allowing RAS mixtures.
- Exposure to methods state DOTs use to get additional virgin asphalt binder in mixtures with RAS contents.
- Awareness of what participating state DOTs identified as important implementation considerations for RAS use.
Related publication: A Field Review: Successful Practices and Lessons Learned When Using Reclaimed Asphalt Shingles in Asphalt Mixtures
Related publication: Tech Brief: Practices and Lessons Learned When Using Reclaimed Asphalt Shingles in Asphalt Mixtures
Webinar link: Successful Practices and Lessons Learned When Using RAS is Asphalt Mixtures
Expected outcomes:
- Understand what the proposed revisions are from national research and how they are related
- Understand how the proposed revisions relate to current specification parameters and expected distresses
- Understand how specification testing may be impacted (time, complexity, variability) when considering implementation of new procedures and requirements
Webinar link: http://www.kaltura.com/tiny/hbnr8
Presentation link: https://scholarwolf.unr.edu/handle/11714/11096
Related publications:
- NCHRP REPORT 982: https://nap.nationalacademies.org/catalog/26302/relationships-between-the-fatigue-properties-of-asphalt-binders-and-the-fatigue-performance-of-asphalt-mixtures
- NCHRP Report 967: https://nap.nationalacademies.org/catalog/26089/asphalt-binder-aging-methods-to-accurately-refect-mixture-aging
- NCHRP 20-44(19) Final Report: https://onlinepubs.trb.org/onlinepubs/nchrp/20-44(19)/FinalReport.pdf
- “Proposed Changes to Asphalt Binder Specifications to Address Binder Quality-Related Thermally Induced Surface Damage”: https://journals.sagepub.com/doi/10.1177/03611981211065428