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CETCO LINING TECHNOLOGIES - ANNUAL SHEARING <br />GCL DIRECT SHEAR TESTING (ASTM D 6243) <br />Upper Shear Box: Steel grip <br />Balck geotextile side of Bentomat DN GCL (Lot #200817LO/Roll 43068)/Polyflex 60 -mil textured HDPE geomembarne (asperity = 21 mils) <br />Lower Shear Box: Concrete sand <br />12000 <br />— 17A <br />10000 — 17B <br />— 17C <br />8000 <br />c <br />6000 <br />L <br />CQ <br />d <br />4000 <br />2000 <br />0 4= <br />0.0 <br />0.8 1.6 2.4 3.2 <br />Displacement (in.) <br />18000 <br />15000 <br />12000 <br />a. <br />s <br />on <br />i 9000 <br />L <br />6000 <br />3000 <br />0 _V <br />0 <br />Shear Strength 6 a R2 <br />t2> de st <br />Peak 24 130 1.000 <br />LD 12 80 1.000 <br />O Peak <br />❑ LD <br />--- Linear (Peak) <br />Linear (LD) <br />3000 6000 9000 12000 15000 18000 <br />Normal stress (nsfl <br />Test <br />No. <br />Shear <br />Box Size <br />(in. x in. <br />formal <br />Stress <br />(psf) <br />Shear <br />Rate <br />(in./min) <br />Soaking <br />Stress Time <br />(psf) (hours) <br />Consolidation (Stress and Time) <br />Phase 1 I Phase 2 1 Phase 3 <br />(psf) (hour) (psf) (hour) (psf) (hour) <br />GCL <br />wwt <br />(%) (%) <br />Shear Strength' l Coefficient of <br />TP 'LLD Direct Sliding <br />(psf) (psf) CDs -P CDS-LD <br />17A <br />12 x 121 <br />200 <br />1 0.04 <br />200 24 <br />200 48 - - - <br />98.2 <br />216 123 <br />17B <br />12 x 121 <br />14400 <br />0.04 <br />200 24 <br />14400 48 - - - <br />45.9 <br />6466 3180 <br />17C <br />12 x 12 <br />NOTES: <br />(1) Sliding (i.e., shear failure) occurred at the GCL-geomembrane interface in each test. <br />(2) The reported total -stress parameters of friction angle and cohesion were determined from a best -fit line drawn through the test data. Caution should be exercised in using these strength parameters for applications <br />involving normal stresses outside the range of the stresses covered by the test series. The large -displacement (LD) shear strength was calculated using the shear force measured at the end of the test. <br />017.ds.xls <br />DATE OF REPORT: 5/20/2008 <br />FIGURE NO. C-17 <br />PROJECT NO. SG8007 <br />DOCUMENT NO. <br />FILE NO. <br />