GRI-GM19 Specification - The Geosynthetic Institute

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Regarding SIP Failures• separation-in-plane (SIP) isdisconcerting• generally occurs in peel testing• can “travel” within sheet aconsiderable distance• many opinions as to cause• its sheet related; hence approvedas far as seam spec is concerned
SIP in Dual Track Hot Wedge SeamSIP in Extrusion Fillet Seam
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: Unacceptable Extrusion Fillet Welds
Page 31: The Basic Tables FollowHDPE - smoot

GRI-GM19 Specification - The Geosynthetic Institute

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