Updated accelerated aging test for geomembranes
June 1st, 2023
FIGURE 1 Star fold coupon The accelerated aging process is based on the relationship between temperature and chemical reaction rate, in which the reaction rate increases as temperature rises. Most accelerated aging tests use higher temperatures to accelerate the aging process by representing real-time aging artificially. A good accelerated aging test should simulate real-time aging […]
COMANCO completes preserving tank liner project
May 10th, 2023
COMANCO has installed 29,000 square feet of 40mil HDPE textured geomembrane and geocomposite on 0.60 acres at the Preserving Tank Farm in Alabama. The project is 100% complete. The project involved installing 40mil textured liner on the concrete walls, following installation of the stainless steel batten bar to columns to ensure a tight seal. The […]
Geosynthetics for CCR, PFAS and energy applications
October 1st, 2021
This issue of Geosynthetics magazine delves deep into two innovative uses of geosynthetic clay liners (GCLs) in very different applications: coal combustion residual (CCR) leachates and per- and polyfluoroalkyl substances (PFAS) mitigation in landfills. We also examine three case studies of energy companies using high-density polyethylene (HDPE) geomembranes for flowback water in water evaporation/recycling ponds. […]
Measuring strain in geosynthetics
October 1st, 2021
Q: Currently, what is the best-known method to measure strains in geosynthetics? We are having arguments between results generated from crosshead movement and extensometers. A: This question arises often when comparing ISO 527/ASTM D638 and ASTM D6693 results. The former requires an extensometer, where the latter utilizes crosshead deflection and assumes gauge lengths. This discussion […]
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 […]
An open solicitation to join in a round-robin effort to find a substitute for Igepal CO-630
June 1st, 2021
Improved stress-cracking resistance in high-density polyethylene (HDPE) geomembranes has been a quest of our industry and a hot research topic for years. The Geosynthetic Institute (GSI) has been working in this area since the mid-1980s. The GRI GM13 standard specification for HDPE geomembranes has moved the ASTM D5397 (appendix) single point notch constant tension load […]
Atarfil announces acquisition of Garden City Geotech
February 28th, 2018
On Feb. 26, 2018, Atarfil, headquartered in Atarfe (Granada) Spain, announced the acquisition of Garden City Geotech of Heatherton, Victoria, Australia. Atarfil said in a press release, “The complementary nature of the Garden City Geotech acquisition is expected to enable us to raise our strengths by combining solid local expertise and presence in the Australian […]
Geosynthetic Institute News
August 1st, 2017
Commentary on geosynthetic specifications One can only suspect that the first specification on a given manufactured material came along with or very shortly after the first manufactured product became available. It follows then that some 200 years later, manufactured geosynthetic materials should do likewise. In fact, so-called standards organizations have evolved by publishing the following […]