New ASTM International standard will help in construction with GCLs

August 2, 2018

A newly released ASTM International standard will help those who construct and install geosynthetic clay liners (GCLs), which are used to help with containment for: landfills coal combustion residual storage cells mining operations remediation and environmental protection projects The new standard (D8204) focuses on evaluating both best practices as well as possible negative impacts of …

QA/QC for geosynthetics in waste containment is focus of GSI course

June 26, 2018

The Geosynthetic Institute (GSI) will host an online course entitled “Course 1: Quality Assurance/Quality Control of Geosynthetics in Waste Containment Facilities,” Oct. 16–18, 2018, from 11 a.m. to 12:30 p.m. and from 2 p.m. to 3:30 p.m. EDT each day. Robert M. Koerner and George Koerner will teach the course. This is the first GSI …

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 …