How are interface friction angles determined?
The industry standard test method is the ASTM D 5321 “Determining the coefficient of soil and geosynthetic or geosynthetic and geosynthetic friction by the direct shear method”. • What are the advantages of Poly-Flex textured liners? Our blown-film textured liners have smooth edges and are covered by U.S. Patent Nos. 5,763,047 and 5,804,112. The blown-film texturing provides increased friction angles for higher stability on steep slope applications. Additionally, the smooth edges result in easier, more cost-effective, more consistent, and better welding. • What is the minimum degree of roughness (texturing) a textured liner should have? The minimum industry standard specification GRI GM13 and GRI GM17, require a minimum Asperity Height of 10 mils for textured HDPE and textured LLDPE geomembranes. • What are the temperatures for material that can be contained by Poly-Flex liners? Poly-Flex geomembranes are thermoplastic materials, hence their physical properties are temperature dependen
