How to create a natural-looking pond with a geomembrane liner
September 27th, 2021
Constructing water pond with a geomembrane in Sweden. Photograph courtesy of BTL Liners Not all lining material is created equal. Although preshaped rigid liners exist, they are not normally what you would choose for your fish-stocking pond. No matter how small or large the pond you have in mind, your best option today is flexible […]
Geomembrane freshwater bladders for eco-friendly beach resort
August 31st, 2021
Photograph courtesy of Solmax An eco beach resort in an undeveloped wilderness area in Panama needed to find a way to store fresh water (rainwater) for use during dry spells. The goal of the resort is to educate while entertaining and to reduce the impact on the environment. It was thus important to the resort […]
How to install a liner in a large pond
August 25th, 2021
An AGRU HDPE geomembrane installed in Tulfes, Austria. Photograph courtesy of AGRU Austria Ponds are useful in a variety of functions, serving in processes such as water treatment, thermal storage, farming and more. Regardless of their function, one of the most important considerations in pond design is containment. Containment is often handled through compacted clay […]
Solmax liners help secure 10-day build of Wuhan hospital
April 1st, 2021
Workers involved in the installation of the Solmax liner for the Huoshenshan Hospital in Wuhan, China. Photograph courtesy of Solmax In late January 2020, just before the Chinese Lunar New Year, the COVID-19 pandemic broke out in large areas of Wuhan, Hubei Province, China. The city went into lockdown on Jan. 23, 2020, with the […]
The GMA Techline
February 1st, 2021
Moderated by George R. Koerner BIOLOGICAL DEGRADATION OF PE AND PP Q: Can you please enlighten me on the biological degradation of polyolefin polyethylene (PE) and polypropylene (PP)? A: Within the various plant forms of biological life, i.e., bacteria, actinomycetes, fungi and algae, polymer degradation is essentially nonexistent due to high molecular weight of the common […]
The GMA Techline
April 1st, 2020
Moderated by George R. Koerner and Y. “Grace” Hsuan Welding Rod Q: This question is in regard to the welding rod intended for welding of geomembranes (both high-density polyethylene [HDPE] and linear low-density polyethylene [LLDPE]). Are there any GRI GM13- or GM17-based requirements for welding rods or are there any white papers or specifications? I […]
Large-scale studies to evaluate the resilient modulus of geocell-reinforced pavement
April 1st, 2019
The 2017 ASCE report card (ASCE 2017) on civil infrastructure assigned grade “D” for America’s roads, and this rating necessitates the adoption of more sustainable and resilient approaches in design and construction of transport infrastructures such as highway embankments and pavements. Reclaimed asphalt pavement (RAP) material has been considered as one of the sustainable options […]
The GMA Techline
April 1st, 2019
Vegetation causing gases under geomembrane? Q: I have a site where we are installing a high-density polyethylene (HDPE) liner in an existing pond. Because of some residual heavy metals in the top layer of soil, I would like to strip off the top 3–6 inches (7.6–15.2 cm) of soil and vegetation. Alternatively, we could mow and […]
A leachate pond geomembrane after 25 years of service
February 1st, 2019
This article reports on the evaluation of an exposed geomembrane liner in a landfill leachate pond after being in service for 25 years. The evaluation was performed in two campaigns: in August 2014 and in May 2018. The purpose of the evaluation was to determine the condition of the geomembrane and to provide a recommendation […]
EPT introduces new string-reinforced LLDPE geomembrane
December 13th, 2018
To meet the growing demand for linear low density polyethylene (LLDPE) by geomembrane fabricators and installers, Engineered Polymer Technologies (EPT) has announced a new string-reinforced LLDPE fabric. LLDPE has been in increasing demand due to its superior flexibility and better layflat versus high density polyethylene (HDPE). EPT has specially formulated its LLDPE fabric for high […]