Laserfiche WebLink
Table 3 <br />Summary of Internal/Interface Shear Strength and Testing Requirements <br />Vertical Expansion of North County Recycling Center and Sanitary Landfill <br />Note: <br />1. Applicable to future Modules 5 through 11. Test configuration should be identical to the liner configuration in the field. <br />2. Large -displacement shear strength as measured at a shear displacement of 3 inches; the listed values correspond to a friction <br />angle of 12 degrees.6 <br />3. The shear strength of internal shear plane within the GCL and its interfaces with the two geomembranes should be tested <br />simultaneously by placing the GCL in a floating condition.7 <br />4. This test is required only if a geotextile cushion is used above the geomembrane. <br />5. The interface shall be wetted by spraying with water before shearing. <br />6. Revision 1: Note 2 corrected to reflect the friction angle of 12 degrees used to calculate required large displacement shear <br />strength. <br />7. Revision 2: Test method updated for GCL against geomembrane test; geomembrane against geotextile test shall be in a wet <br />condition; updated text of Note 3. <br />Rev. 2, 12/15/2009 <br />Hydration <br />Minimum <br />Large - <br />Test Configuration) <br />ASTM <br />Test <br />Time <br />Required <br />Strain Rate <br />Shear <br />Normal <br />Stress <br />displacement2 <br />Shear Strength <br />Method <br />Condition <br />prior to <br />Displacement <br />Required <br />Shearing <br />inch/minute <br />inches <br />s <br />s <br />GCL against 60 -mil double- <br />5,000 <br />1,065 <br />sided textured HDPE <br />D62437 <br />Submerged <br />48 hours <br />0.04 <br />3.0 <br />10,000 <br />2,125 <br />geomembrane3 <br />15,000 <br />3,190 <br />20,000 <br />4,250 <br />60 -mil double -sided <br />5,000 <br />1,065 <br />textured HDPE <br />D5321 <br />Wet5'7 <br />Not <br />0.2 <br />3.0 <br />10,000 <br />2,125 <br />geomembrane afainst <br />applicable <br />15,000 <br />3,190 <br />Geotextile <br />20,000 <br />4,250 <br />Note: <br />1. Applicable to future Modules 5 through 11. Test configuration should be identical to the liner configuration in the field. <br />2. Large -displacement shear strength as measured at a shear displacement of 3 inches; the listed values correspond to a friction <br />angle of 12 degrees.6 <br />3. The shear strength of internal shear plane within the GCL and its interfaces with the two geomembranes should be tested <br />simultaneously by placing the GCL in a floating condition.7 <br />4. This test is required only if a geotextile cushion is used above the geomembrane. <br />5. The interface shall be wetted by spraying with water before shearing. <br />6. Revision 1: Note 2 corrected to reflect the friction angle of 12 degrees used to calculate required large displacement shear <br />strength. <br />7. Revision 2: Test method updated for GCL against geomembrane test; geomembrane against geotextile test shall be in a wet <br />condition; updated text of Note 3. <br />Rev. 2, 12/15/2009 <br />