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Designing Reinforced Soil Structures
October 1, 2022 | Q&A: GMA Techline
Q: Why is strain compatibility important in designing reinforced soil walls?
Liner system leakage estimations
October 1, 2022 | Q&A: GMA Techline
Q: What is the anticipated leakage rate through a composite liner (i.e., geomembrane on low-permeability soil) system?
Geosynthetic clay liner with aquiclude
August 1, 2022 | Q&A: GMA Techline
Q: We are trying to design and construct an aquiclude with a geosynthetic clay liner (GCL). Do you have any experience with this application where a GCL has been used as the impervious barrier between a flowing stream and the underlain geologic formation?
Working on an ethylene interpolymer alloy (EIA) specification
August 1, 2022 | Q&A: GMA Techline
Q: I have an upcoming project that will use ethylene interpolymer alloy (EIA). Is the Geosynthetic Research Institute (GRI) working on a specification for this material?
What is the CSI code for geosynthetics?
August 1, 2022 | Q&A: GMA Techline
Q: What is the CSI code for geosynthetics?
Do you have experience with T seams?
August 1, 2022 | Q&A: GMA Techline
Q: I have a question about T-intersections where three panels of geomembrane meet. In my experience these intersections have all needed to be repaired with a patch. However, a recent project fusion welded straight through these intersections. Air channel testing was completed on the first seam prior…
Liner materials that can perform in the toughest applications
August 1, 2022 | Q&A: GMA Techline
Q: I am working on a 60 mil (1.5 mm) high-density polyethylene (HDPE) that will receive septage leachate. The pH will be below 5 and probably lower. I am looking for technical literature on liner performance at pH levels possibly as low as 2. Thank you for your assistance.
Impregnation as it relates to seaming geosynthetic clay liners
August 1, 2022 | Q&A: GMA Techline
Q: We are confused with the term “impregnation” as it relates to seaming geosynthetic clay liners (GCLs). There are two types of impregnations: (1) edge impregnation and (2) complete nonwoven (cap layer) impregnation of GCLs. How does a manufacturer do this?
Pipe penetrations through geomembranes
June 1, 2022 | Q&A: GMA Techline
Q: Is there a recommended detail that you can provide or point me toward for pipe penetrations through geomembrane single and double liners?
Geotextile impact testing
June 1, 2022 | Q&A: GMA Techline
Q: We would like to carry out an impact test on geotextiles as described in Koerner (2012), Chapter 2.3.3 Mechanical Properties-Impact Test and Chapter 2.5.5 Impact (Tear) Resistance. I came across the Geosynthetic Research Institute (GRI) GS2 Test Method for Rupture Strength of Geosynthetics by Pen…