Event: NAGS 2014 Webinar Series: Presentation #1
Date: Wednesday March 19, 2014, 1 – 2 pm EDT
Location: Online Webinar

NAGS is very pleased to announce the 2014 Webinar Series:Presentation #1:
“Recent insights on the performance of GCLs in bottom liners and covers”

Presented by:
R. Kerry Rowe
GeoEngineering Centre at Queen’s-RMC
Queen’s University, Kingston, Canada

DATE: Wednesday March 19, 2014, 1-2 pm EST

ABSTRACT: The available evidence suggests that both geosynthetic clay liners (GCLs) and composite liners with a geomembrane (GMB) over a clay liner have performed extremely well at controlling leakage in field applications for a couple of decades. However there have also been some problems reported and recent research has allowed us to have a much better understanding of the key design and construction factors affecting good and poor performance. This lecture examines some of these issues affecting GCL performance such as the water retention curve of GCLs, subgrade grain size and initial water content, GCL water content and normal stress on the GCL, the effect of daily thermal cycles on hydration, GCL panel shrinkage, and cation exchange. Factors affecting composite liner performance examined include the potential for desiccation of the clay liner under a sustained thermal gradient, GMB/GCL interface transmissivity, wrinkles in the GMB when the ballast layer is placed over the composite liner, and the potential interaction between wrinkles and GCL panel overlaps. Recent insights regarding leakage through composite liners are discussed. Although a number of potential issues with liner performance are discussed, it is concluded that all can be addressed by appropriate design, material selection, construction, and operation.

ABOUT THE SPEAKER: Professor Rowe holds the Canada Research Chair in Geotechnical and Geoenvironmental Engineering at Queen’s University. He is an author of 300 journal papers, 3 books, 18 book chapters, and 290 full conference papers. He has presented many prestigious lectures including the Giroud Lecture (2002), Rankine Lecture (2005), and Casagrande Lecture (2011). He is a fellow of the Royal Society of Canada, the Canadian Academy of Engineering, the Royal Academy of Engineering and The Royal Society. He is past president of the International Geosynthetics Society, Canadian Geotechnical Society, and Engineering Institute of Canada.

PRESENTATION #1 REGISTRATION FEE:
$100 – Presentation #1 MEMBER Fee: NAGS / CGS / IGS
$300 – Presentation #1 NON-MEMBER Fee ( Save money and become a member of NAGS today! )
$25 – Presentation #1 NAGS Student Member Rate ( Students may apply to NAGS at no charge for membership! )

PDHs: Professional development credit will be available for each participant paying a registration fee.

GROUPS: Small groups of up to five people are welcome to participate for one registration fee.
Groups larger than five would be required to pay a second registration fee.

NOTES: All fees are in USD. Why not join NAGS for $75 USD? Please see www.nags-igs.org for details.

Co-sponsored by the Geosynthetics Division of the Canadian Geotechnical Society (CGS)

NAGS – Providing leadership in advancing the education and research of geosynthetics