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Technical Paper: Standard in-plane flow capacity test for geocomposites and Standard in-plane flow capacity test for geocomposites and effects on slope

Nigel Robinson, independent landfill designer, and Goran Erak, ABG Geosynthetics. This paper was first published in GE’s April 2014 edition.


This paper explains the importance of using standard BS EN ISO 12958 in-plane flow test and correct testing conditions for all geocomposites and their applications.

The standard requires soft platens to be used in contact with the geocomposite to simulate soil backfill and replicate flow capacity reduction due to geotextile intrusion, unless the products are designed to be used against hard structures when the platen specifications can be changed. The test can be carried out using soft or hard platens or one of each and all have their place. However, designers, specifiers and quality engineers need to understand their uses and ensure the products they are specifying provide the correct values for their designed use.

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