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CETCO LINING TECHNOLOGIES <br />INTERFACE DIRECT SHEAR TESTING (ASTM D 5321 <br />Upper Shear Box: Concrete sand <br />Hydrated Bentomat DN GCL (Lot 9200726CV/Roll #2922) with black nonwoven geotextile side down against <br />Agru 60 -mil Microspike HDPE geomembrane with long spike (shiny) side up <br />Lower Shear Box: Concrete sand <br />14000 <br />12000 <br />10000 <br />C <br />d 8000 <br />L <br />O <br />w <br />6000 <br />d <br />4000 <br />2000 <br />0 -1- <br />0.0 <br />— 1B <br />0.8 1.6 2.4 3.2 <br />Displacement (in.) <br />25000 <br />20000 <br />a <br />.e 15000 <br />bA <br />L' <br />L <br />10000 <br />.0 <br />5000 <br />0 <br />0 <br />Shear Strength S a Rz <br />Parameters(2) (deg) (psf) <br />Peak 24 0 1.000 <br />LD 12 0 1.000 <br />O Peak <br />❑ LD <br />----- Linear (Peak) <br />— Linear (LD) <br />Duvu luuuu 15000 20000 25000 <br />Normal stress (nsf) <br />Test Shear <br />No. Box Size <br />(in. x in. <br />iB 12 x 12 <br />Normal <br />Stress <br />(psf) <br />21600 <br />Shear <br />Rate <br />(in./min) <br />0.04 <br />GCL Soaking <br />Stress Time <br />(psf) (hour) <br />200 24 <br />Consolidation Steps <br />(psf, hr) <br />1 2 3 4 5 6(%) <br />500, 2 1000, 2 2000, Z 4000, 2 8000, 2 16000, 2 21600, 48 <br />ff1CL Shear Stress <br />�TTLD <br />(psf) (psf) <br />45.2 9396 1 4530 <br />Failure <br />Mode <br />1 <br />INV LEN: <br />(1) Shear failure at the interface between the long spike side of geomembrane and black geotextile side of GCL. <br />(2) The reported total -stress friction angle was determined by drawing a straight line from origin through the test data point. Caution should be exercised in using the friction angle for applications <br />involving normal stresses other than the test normal stress. The large -displacement (LD) shear strength was calculated using the shear force measured at the end of the test. <br />DATE OF REPORT: 5/2/2009 <br />FIGURE NO. 2 <br />PROJECT NO. SGI9018 <br />DOCUMENT NO. <br />FILE NO. <br />�01.ds.xls <br />