Geomembrane

A geomembrane is very low permeability synthetic membrane liner or barrier used with any geotechnical engineering related material so as to control fluid (liquid or gas) migration in a human-made project, structure, or system.

The manufacturing of geomembranes begins with the production of the raw materials, which include the polymer resin, and various additives such as antioxidants, plasticizers, fillers, carbon black, and lubricants (as a processing aid).

[2] The US market is currently divided between HDPE, LLDPE, fPP, PVC, CSPE-R, EPDM-R and others (such as EIA-R and BGMs), and can be summarized as follows:[citation needed] (Note that Mm2 refers to millions of square meters.)

[citation needed] Perhaps the greatest increases will be seen in the containment of coal ash and heap leach mining for precious metal capture.

The main physical properties of geomembranes in the as-manufactured state are: There are a number of mechanical tests that have been developed to determine the strength of polymeric sheet materials.

Any phenomenon that causes polymeric chain scission, bond breaking, additive depletion, or extraction within the geomembrane must be considered as compromising to its long-term performance.