Member $299.00 | Non-Member $349.00
Co-sponsored by ASCE Continuing Education and ASCE's Geo-Institute (G-I).
INSTRUCTOR: Patrick J. Fox, Ph.D., P.E., M.ASCE
Geosynthetic clay liners (GCLs) are used worldwide as hydraulic barriers in waste containment facilities, heap leach pads, ponds, canals, and other related engineered works. Acceptance of GCLs during the last 30 years has been rapid because these products offer many advantages over compacted clay liners, not the least of which is lower cost for many applications. However, testing and design using GCLs is more difficult than for any other geosynthetic material. In this webinar series, fundamental and advanced topics for engineering with GCLs are discussed and design methods are presented, with emphasis on waste containment applications. This webinar presents an overview of GCLs and their applications, with emphasis on the waste containment industry.
Purpose and Background
The two most essential requirements of GCLs are acceptable performance for hydraulic containment and stability. Hydraulic conductivity and chemical compatibility of GCLs has received much attention in the last decade as research has indicated that hydraulic containment performance is strongly dependent on chemical environment, wetting/drying history, and overburden stress. Likewise, shear strength of GCLs has also been the subject of numerous recent investigations involving large displacements, high overburden stress, dynamic loading, and geomembrane protection from coarse soil subgrades.
Primary Topics of Discussion/Outline
• Introduction to webinar series
• Properties of bentonite
• Types of GCLs and manufacturing methods
• Engineering properties and testing methods for GCLs
• Overview of GCL applications, design considerations, and construction methods
• Lateral shrinkage stability for GCLs
• Conclusions
• Questions
Learning Outcomes
• Comprehend the component materials and manufacturing of GCLs
• Understand engineering properties and testing methods for GCLs
• Discuss engineering applications for GCLs
• Understand advantages and limitations of GCLs in engineering design
Webinar Benefits
• Learn skills for assessment of overall benefit of GCLs in design
• Understand selection of GCLs in design
• Discuss specification of testing programs for GCLs
• Develop an understanding of how to avoid lateral shrinkage of GCLs in the field
Intended Audience
• Civil engineers
• Geoenvironmental engineers
• Geotechnical engineers
• Geological engineers
• Environmental engineers
• Mining engineers
• Hydrologists involved in landfill design, site remediation, mine waste containment, and low level radioactive waste containment
• Landfill and containment system designers
• Environmental regulators
• Site owners
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