GRI-GM19 Specification - The Geosynthetic Institute

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Concluding Comments• spec addresses HDPE, LLDPE and fPPgeomembrane seams• accommodates smooth, textured andreinforced geomembranes• silent on sheet manufacture method• addresses hot wedge (single and dualtrack) and extrusion fillet seams• if testing conducted in the field, shearelongation and peel separation can beeliminated and reported accordingly
<strong>The</strong> Basic Tables FollowHDPE – smooth and texturedLLDPE – smooth and texturedfPP – nonreinforced and reinforcedNote: <strong>The</strong> most recent version of this specification (textand tables) is available on the GSI Web Site.
Page 1 and 2: GRI-GM19 SpecificationSeam Strength
Page 3 and 4: Seam Cross Section
Page 5 and 6: Method of Attributes• follows GRI
Page 7 and 8: ShearTestPeel Test
Page 9 and 10: Regarding Shear Testing• 4/5 must
Page 11 and 12: Shear TestPhoto 2
Page 13 and 14: Shear TestPhoto 4
Page 15 and 16: Regarding Shear ElongationELLo(100)
Page 17 and 18: Regarding Peel Testing• 4/5 must
Page 19 and 20: Peel TestPhoto 2
Page 21 and 22: Peel TestPhoto 4
Page 23 and 24: Regarding Peel Separation• also c
Page 25 and 26: Locus-of-Break Patterns (Codes)•
Page 27 and 28: Unacceptable Extrusion Fillet Welds
Page 29: SIP in Dual Track Hot Wedge SeamSIP

GRI-GM19 Specification - The Geosynthetic Institute

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