TRB conducted a webinar on December 11, 2012, from 2:00 p.m.-4:00 p.m. ET. This is the second webinar in a multi-part series that will explore the basics about the mechanical behavior of asphalt concrete. Contact Reggie Gillum at
RGillum@nas.edu for information about receiving the recorded webinar.
This webinar, organized by the TRB Standing Committee on Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements (AFK50), will examine the analytical and numerical models that are necessary to capture asphalt behavior. The webinar is designed for public and private sector engineers as a short course on the topic of asphalt modeling.
Download the slides.
Basics of Asphalt Modeling Part 2 from The Academies on Vimeo.
TRB conducted a webinar on December 11, 2012 that is the first in a series that explores the basics about the mechanical behavior of asphalt concrete. The webinar addresses time-temperature superposition; damage in viscoelastic material; and plasticity and viscoplasticity. The webinar is designed for public and private sector practicing engineers and will serve as an educational short course on the topic of asphalt modeling. This webinar was organized by the TRB Standing Committee on Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements (AFK50).
Webinar Presenters:
- Amit Bhasin, University of Texas at Austin
- Richard Kim, North Carolina State University
- Charles Schwartz, University of Maryland
Moderated by: Eshan Dave, University of Minnesota, Duluth Campus
Webinar Outline:
- Introduction
- Time – temperature superposition
- Basics of TTSP
- Constructing and interpreting the master curve
- Introduction to damage in viscoelastic materials
- Stiffness versus strength
- The “M-E” in MEPDG (Mechanistic-Empirical Pavement Design Guide): why we use empirical conversion from dynamic modulus to damage and why this does not always work.
- What is continuum and why use continuum damage to characterize damage evolution in time dependent materials?
- The dilemma of different rank orders when using displacement controlled tests versus load controlled tests and how continuum damage mechanics can resolve this.
- Introduction to plasticity and viscoplasticity
- Basics of plasticity and viscoplasticity
- Strain dependence of viscoplasticity
- Essential components of a model (e.g., overstress function, potential etc.)
- Mechanical analog models approach to plasticity
- Significance of aggregate structure in addition to binder
Learning Objectives
On completion of this webinar the attendees will be able to:
- Understand the applications of various computational and analytical models used for characterization and analysis of asphalt materials;
- Identify necessary model attributes as applied to various pavement distress mechanisms, such as moisture induced damage, rutting, and cracking; and,
- Understand asphalt models and become familiar with the current state of the art on this topic.
Past Webinar:
View details about the October 18, 2012
TRB Webinar: Basics of Asphalt Modeling: Part 1. Contact Reggie Gillum at
RGillum@nas.edu for details on receiving a copy of the October 18 webinar slides or a copy of the webinar recording.
Future Webinars:
The December 11, 2012 webinar will complete the two-part introductory series on the basics of asphalt modeling. Follow-on webinars currently being planned by the committee will focus on applications of asphalt modeling to understand various asphalt distresses and design materials to prevent distresses. This webinar series is geared towards the review of technical materials to build and enhance the theoretical foundation for applying asphalt modeling towards:
- Characterization of asphalt materials
- Material selection process
- Prediction of pavement performance
- Improving longevity of roadways
- Making recommendations for pavement rehabilitation strategies
To ensure that you receive notices about upcoming webinars, please subscribe to the
TRB Transportation Research E-Newsletter.
Registration information:
There is no fee for employees of
TRB sponsors who register using their work email address. In addition to employees of TRB sponsor organizations, the following are eligible to receive complimentary webinar registration:
- TRB and National Academies employees
- Chairs of TRB standing committees, sections, or groups
- CRP panel members who were involved with developing the report or project that is the subject of the webinar
- Members of the media
- Congressional staff members
Other sites must pay $89 per site.
View our pricing page for details.
After registering you will receive a confirmation email containing information about joining the webinar.
Professional Development Hour information:
A certificate for 2 Professional Development Hour (PDH) will be provided to Professional Engineers (PEs) who register and attend the webinar as an individual. For groups, only the person that registers and attends the session will receive a PDH certificate.
Individuals registered as Florida PEs are required to email Reggie Gillum,
RGillum@nas.edu, with their license number.
Please check with your licensing board to ensure that TRB webinar PDHs are approved by your board.
This webinar was developed in April 2012. TRB has met the standards and requirements of the Registered Continuing Education Program (RCEP). Credit earned on completion of this program will be reported to RCEP by TRB. Certificates of Completion will be issued to individuals who register for and attend the entire webinar session. Complaints about registered providers may be sent to RCEP, PO Box 1686, Clemson, SC, 29633. Website:
www.RCEP.net.
Registration questions? Contact Reggie Gillum at
RGillum@nas.edu.
This Summary Last Modified On: 7/21/2015