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FHWA > Pavement : Bridge > ASR > > FHWA Alkali-Aggregate Reactivity (AAR) Webinar Series

FHWA Alkali-Aggregate Reactivity (AAR) Webinar Series

Through the FHWA ASR Development and Deployment Program there is a national effort to further the development and deployment of techniques which can prevent and mitigate ASR.

A series of webinars will be conducted in order to provide information on ASR prevention and mitigation techniques to engineers and practitioners.


  • Review the fundamentals of alkali-aggregate reaction (e.g. alkali-silica reaction, ASR, versus alkali-carbonate reaction, ACR)
  • Summarize available methods of preventing or mitigating ASR-induced damage in newly-constructed and existing concrete structures.
  • Discuss and recommend test methods and specifications related to AAR.
  • Provide case studies of AAR-affected concrete structures, including rehabilitation strategies.

Dates and Agenda

The webinars will consist of three different sessions (Parts I, II, & III). The 2.5-hour training events are scheduled for February 6, 13, & 20, 2013 from 1 p.m. to 3:30 p.m. (Eastern) | Noon to 2:30 p.m. (Central) | 10 a.m. to 12:30 (Pacific).

Who Should Attend

  • State DOT personnel
  • Local government personnel
  • Engineers
  • Practitioners
  • Technicians
  • Academia

Part I—February 6, 2013

  • Fundamentals of Alkali-Aggregate Reaction (AAR)
  • Symptoms of AAR
  • AAR Test Methods
  • Discussion

Part II—February 13, 2013

  • Prevention of ASR
  • AAR Specifications
  • Discussion

Part III—February 20, 2013

  • Diagnosis and Prognosis of AAR
  • Repair Methods
  • Discussion


To register online, follow this link:

You need only register once for the entire series. After registering, you will receive a confirmation email containing information about joining the webinars.

There is no cost to participate. Reference materials will be provided for registered attendees.

For registration assistance, please contact Helga N. Torres at, or alternatively, Ruth Calisch at 512-451-6233 |


Dr. Kevin J. Folliard
The University of Texas at Austin
(512) 232-3591

Dr. Benoit Fournier
Laval University
(418) 656-3930

Dr. Michael D.A. Thomas
University of New Brunswick
(506) 458-7789


Helga Torres
The Transtec Group, Inc.
(512) 451-6233


Gary Crawford
Pavement Engineer
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, D.C. 20590
(202) 366-1286

PDF files can be viewed with the Acrobat® Reader®
Updated: 02/15/2013