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d. Shear at 0.04 in./min per ASTM D 5321 to post-peak conditions of 3 <br /> inches or more. <br /> C. The asperity of the textured HDPE geomembrane used in testing shall <br /> be recorded [GM 12]. The data shall be submitted with the test <br /> results. The HDPE geomembrane used for shear strength testing shall <br /> be the salve one that will be shipped to the site for construction of the <br /> lining system. <br /> f. The testing laboratory shall submit 4"x4" tested geomembrane and <br /> cushion geotextile sample with the test results to the QA/QC <br /> CONSULTANT. The lot and roll number of the geomembrane should <br /> also be reported. <br /> 9. The QA/QC CONSULTANT shall test the interface shear strength of the <br /> Double Sided Textured HDPE Geomembrane and the clay liner in <br /> accordance with the CQA Manual requirements and as described below. The <br /> textured side of the HDPE Geomembrane shall be tested against the clay liner <br /> and shall exhibit an interface shear strength equal to that of the clay liner <br /> alone and having a minimum post-peak (@ 3-inch or more deformation) <br /> interfacial shear strength represented by a friction angle of 18 degrees and an <br /> apparent cohesion of 0 psf and a friction angle of 10 degrees and an apparent <br /> cohesion of 1,000 psf for normal load ranges from 0 to 6,500 psf and from <br /> 6,500 psf to 17,000 psf, respectively. <br /> a. Post-peak conditions are defined as the point at which the applied <br /> shear stress remains constant with increasing displacement up to <br /> 3-inch or more. Perform the interface shear strength tests between the <br /> textured HDPE Geomembrane and the clay liner in accordance with <br /> the following: <br /> 1) The clay liner soil will be placed in the upper shear box and <br /> compacted to a minimum 90 percent relative compaction at a <br /> moisture content between 3 to 8 percent above optimum in <br /> accordance with ASTM D1557. <br /> 2) Spray textured side of site specific HDPE geomembrane with <br /> water. Anchor HDPE on top of lower box and place textured side <br /> of geomembrane against compacted clay liner. <br /> 3) The gap between two boxes shall be large enough such that the <br /> clay and HDPE are open so that failure occurs along the weakest <br /> surface. <br /> 4) Saturate with water under test normal stress for 24 hours. Use <br /> test normal stresses of 2,000; 4,000; 8,000; and 12,000. <br /> 5) Shear at 0.04 in./min per ASTM D 5321 to post-peak conditions <br /> of 3 inches or more. <br /> FORWARD LANDFILL 02778 <br /> HIGH DENSITY POLYETHYLENE <br /> 9 (HDPE)GEOMEMBRANE <br />