Dynamic shear strength of geosynthetic clay liners

October 1, 2013

Part 3: Dynamic strength By Patrick J. Fox and Chris Athanassopoulos View Part 1 and Part 2. Introduction The final segment of our three-part series on geosynthetic clay liner (GCL) shear strength is devoted to dynamic strength, the strength measured for rapid loading conditions. Static shear strengths have been reported for a wide variety of …

Tektoseal is Huesker’s new multi-component GCL

July 10, 2013

For groundwater protection, site remediation, hydraulic engineering. Geosynthetic clay liners (GCL) have been used for many years as a natural sealing option for groundwater protection, contaminated site remediation, landfill construction, hydraulic engineering, and road construction applications. Germany-based geosynthetics manufacturer, Huesker Synthetic, has now introduced a new industrially manufactured bentonite sealing system, Tektoseal. In a July …

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Evaluations of engineered cover systems for mine waste rock and tailings

June 1, 2013

Geosynthetics for mining waste rock and tailings. By Mark E. Smith and Christos Athanassopoulos Introduction Waste rock dumps and tailings impoundments are common features at mine sites. Many of these waste disposal facilities contain sulfide-rich minerals that generate acid mine drainage (AMD) when they oxidize in the presence of oxygen and water. Control of AMD …

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Static shear strength of geosynthetic clay liners

February 1, 2013

Part 2: Static shear strength By Chris Athanassopoulos, P.E. and Patrick Fox, Ph.D., P.E. Introduction Part 2 of our three-part series on geosynthetic clay liner (GCL) shear strength is devoted to static shear strength, which is the strength measured for relatively slow loading conditions. Internal and interface static shear tests have been conducted for a …

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Shear strength of geosynthetic clay liners

October 1, 2012

Part 1: Strength measurement By Patrick J. Fox, Ph.D., P.E., and Chris Athanassopoulos, P.E. Introduction The geosynthetic clay liner (GCL) has been with us for 30 years. Originally invented in the early 1980s as a flexible alternative to rigid waterproofing materials, GCLs are now used worldwide as hydraulic barriers in waste containment facilities, heap leach …

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Liner questions

October 1, 2011

From the GMA Techline RE: Liner questions I am designing a surface impoundment with interior side slopes of 1.5H:1V. This impoundment requires (per regulations) a geosynthetic clay liner (Bentomat DN or equivalent), 40-mil HDPE secondary liner, and 60-mil HDPE primary liner. A leak-detection system has been requested. The pit is small (approximately 500ft x 200ft) …

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Comparing GCLs

From the GMA Techline RE: GCLs I need some assistance in comparing two geosynthetic clay liners for a project where the specification gives a total bentonite mass required of 4500g/m2 and a target hydraulic conductivity of < 5 × 10-11. We have an option of a liner that far exceeds the requirement of the hydraulic …

NAUE opens new plant in Malaysia

May 20, 2011

Germany-based NAUE GmbH & Co. has opened a new geosynthetic clay liner (GCL) production center in Malaysia designed to serve the Asian and Oceanic markets, according to a May 19 press release from the company. “This is a significant move for NAUE,” said Thomas Knuffinke, one of the firm’s managing directors. “While the company has …

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Proven geosolutions for Florida landfill expansion

August 1, 2010

Introduction The combined efforts of industry experts make it possible to complete large, complex projects on time, on budget, and with the highest regard to quality. In 2009, the 62-acre expansion of the Sarasota Municipal Landfill was the state of Florida’s largest single landfill installation. In addition to adhering to state and federal regulations, Sarasota …

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GCLs and hydraulic equivalence

June 1, 2009

By Timothy D. Stark Q: Are GCLs hydraulically equivalent to a compacted low permeability soil liner? A: A good, but difficult, question. GCLs are hydraulically equivalent to low permeability soil liner in terms of advective flow. However, GCLs are not hydraulically equivalent to low permeability soil liner in terms of diffusive flow unless a natural …