geomembrane Articles

Strain Measurement in HDPE Geomembrane Tensile Tests

According to ASTM D 638, the tensile strain in an HDPE geomembrane dumbbell specimen subjected to a tensile test should be evaluated using an extensometer that records the elongation of a defined length of the central portion of the specimen. However, the current practice in the United States for HDPE geomembrane quality control and conformance testing consists of following the 1991 NSF standard ...

Mar. 1, 1994

Stabilization of steep slopes of a landfill -

Stabilization of embankments of a landfill, covered with Geomembranes The challenge Construction of a cover of a landfill with geomembranes, in order to avoid possible penetration of water, was very complicated. The plan was to install geomembranes all around the area. Above the geomembranes a cover of local vegetated soil should be installed. Slope with a steep inclination Steep slopes of ...

Feb. 26, 2019

By GeoGlobe Europe LTD

Axisymmetric Tension Testing of Geomembranes

The newly developed axisymmetric tension test is useful in evaluating the performance of geomembranes subjected to out-of-plane stress conditions such as those that can develop due to localized subsidence under waste-containment cover and liner systems. In this paper, the equations necessary to describe the geomembrane stresses and strains during testing are derived, and equations used to ...

Sep. 1, 1993

Numerical modeling of geomembranes

SoilVision Systems Ltd. is pleased to announce the addition of internal boundary conditions which can be used to represent geomembrane materials. The new feature was implemented in response to requests from customers and represents a significant improvement for the numerical modeling of a number of different scenarios involving geomembranes. More specifically, the geomembrane internal boundary ...

May 13, 2010

By SoilVision Systems Ltd.

Stabilization of steep slopes of a landfill - Case Study

Stabilization of embankments of a landfill, covered with Geomembranes The challenge Construction of a cover of a landfill with geomembranes, in order to avoid possible penetration of water, was very complicated. The plan was to install geomembranes all around the area. Above the geomembranes a cover of local vegetated soil should be installed. Slope with a steep inclination Steep slopes ...

Feb. 26, 2019

By GeoGlobe Europe LTD

Geosynthetic/Soil Interface Friction Angles Using a Rotation Shear Device

A modified rotation shear device was used for measuring interface friction angles between soils and geosynthetics. The device was modified so that a geosynthetic specimen can be attached to the upper platen. A reliable method for cutting and attaching geosynthetic specimens to the device is described. The geosynthetic mounting system is simple, strong, and easy to remove. Interface friction ...

Jun. 1, 1995

By Engineered Polymer Technologies (EPT)

EPT New Report Solves Geomembrane Acronym Puzzle

Elvaloy®, patented by DuPont in 1973 has been used as a geomembrane plasticizer for decades. It was developed to provide a solid plasticizer or polymer to replace liquid plasticizers that would make PVC flexible without concerns of plasticizer migration. That much is clear. But what is very blurry is the usage of many of the acronyms and names used in connection with this product. There is ...

Mar. 28, 2018

Detection and Location of Leaks in Geomembrane Liners Using an Electrical Method: Case Histories

ABSTRACT A field-proven electrical technique, developed at Southwest Research Institute, San Antonio, Texas, is commercially available to detect and locate leaks in geomembrane liners. The electrical technique is used to inspect 100% of the geomembrane material that is covered by a conducting liquid. A voltage applied across the liner produces a uniform electrical potential distribution in the ...

Jun. 14, 2014

By Geomembrane Technologies, an Evoqua brand

GTI cover system helps Vallejo sanitation and flood control district streamline its plant operation - case study

Geomembrane Technologies Inc. (GTI) was selected to design and build a new retractable, structurally supported geomembrane cover system for Vallejo. This cover system consisted of a composite sheet of high-strength, coated fabric tensioned across a series of low-profile aluminum arches which span the tank opening. Intermediate aluminum walkways spanning the tank were used to divide the fabric ...

Oct. 15, 2014

HDPE Geomembrane Malaysia for Landfill Project - Case Study

HDPE geomembrane malaysia for landfill is one of many types of applications which HDPE geomembrane can provide the anti seepage lining system for the Malaysia civil engineering market. The main raw material of HDPE geomembrane malaysia is made of high-density polyethylene and medium-density polyethylene. The HDPE geomembrane liner is divided into such two types as smooth surface geomembrane and ...

Apr. 24, 2020

By Earth Shield Environmental Co., Ltd.

0.75mm HDPE Geomembrane Fish Pond Liner In Qatar

0.75mm HDPE Geomembrane Fish Pond Liner In Qatar The use of HDPE Geomembrane as an anti-seepage material can enhance the engineering quality and anti-seepage ability of the dam; if the HDPE Geomembrane is not used for anti-seepage treatment, the side of the dam facing the water flow will allow part of the water flow to penetrate due to the penetration of the dam’s own material In the ...

Apr. 8, 2021

Examining the benefits of HDPE geomembrane

Comparing various geomembranes for your next geosynthetic application? Don’t overlook high-density polyethylene (HDPE) geomembrane. HDPE has been in use for decades and during that time a number of studies have been conducted to test its longevity and ability to meet environmental sustainability project requirements. Here, we explore some of those studies to examine the benefits of HDPE ...

Jan. 26, 2017

By Agru America, Inc.

HDPE Waterproof Geomembrane for Landfill Project in Chile

HDPE Waterproof geomembrane is one of the most affordable and effective geosynthetic liner materials on the market today due to its low initial material cost and excellent chemical resistance with some of the best physical characteristics in the liner industry. HDPE waterproof geomembrane has unmatched puncture and tear resistance compared to other plastic liner products available on the market. ...

Sep. 7, 2019

Costs and Benefits of Geomembrane Liner Installation CQA

ABSTRACT Because the cost of third-party construction quality assurance (CQA) of geomembrane liner installations is typically comparable to the cost of the geomembrane liner, CQA must be optimized to obtain the most benefit for the owner, rate payers, and environment. A regulation-based CQA protocol usually includes testing the material, observing the quality control (QC) program of the liner ...

Jun. 14, 2014

By Engineered Polymer Technologies (EPT)

Playing with blocks...in the road

Anyone old enough to remember when “Styrofoam” was considered detrimental to the environment (it can last for decades in a landfill) will appreciate the latest usage of this same technology in rebuilding our infrastructure. Many of us fondly remember the fun we had playing with building blocks as a child, e.g. Lego’s®. In today’s construction world, EPS Geofoam ...

May 30, 2018

Enhanced Geomembrane CQA through proper application of geomembrane leak location surveys

Abstract Historically, geomembrane construction quality assurance (CQA) has focused on destructive testing of welded seams to verify seam strength and integrity. Paradoxically, seams are not subject to significant stress and practically never fail in service, while holes and construction damage in the geomembrane are a much more widespread problem. The historical approach fails to evaluate how ...

Jan. 1, 2007

Composite Geomembrane Liner for Reservoir Project in Thailand - Case Study

Composite geomembrane liner is a water impermeable material composed of geotextile and geomembrane. The composite geomembrane liner has the functions and advantages of both geotextiles and geomembranes. The geotextile layer increases essential tensile strength and the geomembrane layer provides excellent impermeable, leak and moisture proof. Composite geomembrane is mainly used for anti-seepage ...

May 15, 2020

Experience with GCLs used as a conductive layer in geomembrane leak-location surveys

Engineers, installers, regulators, and owners are starting to rely on geomembrane leak-location surveys as part of the construction quality assurance for landfills. The various methods are described in ASTM Standard D 6747.' Standard procedures for conducting leak-location surveys of geomembranes covered with earth materials are described in ASTM Standard D 7007.2 Figure 1 shows the principle of ...

Jun. 1, 2007

Smooth and Textured HDPE Géomembrane for Mining Tailings Project DRC

HDPE Géomembrane liner is the widely used geosynthetic material for the anti-seepage lining projects in mines, ponds, dams, solid waste disposal sites and other industries projects because of its low permeability and strong corrosion resistance. BPM HDPE Géomembrane liner begins as raw polyethylene resin which is then processed into flexible HDPE liners. BPM HDPE ...

Oct. 12, 2019