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INTERFACE DIRECT SHEAR TESTING (ASTM,D 5321) <br />Test Series 1: site soil against needle -punched side of Bentomat DN GCL (Lot No. 200327LO / Roll No. 3069) against 60 -mil Polyflex textured HDPE geomembrane <br />(Roll No. GR -6-02-2174) against Tenax Tendrain geocomposite (Roll No. unknown) under soaked and consolidated conditior <br />10000 <br />9000 <br />8000 <br />7000 <br />:2 6000 <br />m <br />0 5000 <br />d 4000 <br />r <br />rn <br />3000 <br />2000 <br />1000 <br />0 <br />0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 <br />:_ <br />rn <br />R <br />Cr <br />20000 <br />15000 <br />10000 <br />5000 <br />0 L <br />0 <br />Shear Strength 6/0 c/a R <br />Parameters (de) (sf) <br />Peak <br />22 <br />835 <br />1.000 <br />LD <br />15 <br />40 <br />1.000 <br />2 -In Dis . <br />14 <br />260 <br />1.000 <br />O Peak <br />* LD <br />8 2 -in. DISP. <br />— Linear (Peak) <br />—Linear (LD) <br />--- Linear (2 -in. DISP. ) <br />5000 10000 15000 20000 <br />Normal stress (psf) <br />Test <br />Shear <br />Normal <br />Shear Soaking <br />Consolidation <br />Lower Soil <br />DOCUMENT NO. <br />Upper Soil <br />GCL <br />Shear Stress <br />Shear <br />No. <br />Box Size <br />Stress <br />Rate <br />Stress Time <br />Stress <br />Time <br />Yd! W Wr <br />Ydi <br />mf <br />o% <br />(ill <br />TP <br />TLD <br />Stress (psf) <br />(in. x in. <br />(psi) <br />(inJmin) <br />(psi) (hour) <br />(psi) <br />(hour) <br />(pcl) (%) (%) <br />(pct <br />(%) <br />(%) <br />(%) <br />M) <br />(psi <br />(psf) <br />at 2 in. <br />1A <br />12 x 12 <br />6000 <br />0.040 <br />0 24 <br />6000 <br />48 <br />103.6 <br />9.8 <br />13.6 <br />18.9 <br />98.8 <br />3215 <br />1619 <br />1808 <br />1B <br />12 x 12 <br />12000 <br />0.040 <br />0 24 <br />12000 <br />48 <br />103.8 <br />10.2 <br />13.0 <br />18.9 <br />82.8 <br />5607 <br />3240 <br />3381 <br />1C <br />12 x 12 <br />18000 <br />0.040 <br />0 24 <br />18000 <br />48 <br />- <br />1 103.5 <br />10.1 1 <br />12.9 <br />18.9 <br />73.3 <br />7984 <br />4800 <br />4916 <br />Notes: (1) Sliding (i.e., shear failure) occurred between the GCL and geomemorane uneer eactt normal stress cononion. <br />(2) The reported total -stress parameters of friction angle and adhesion were determined from a best -fit line drawn through the test data. Caution should be exercised in using these <br />strength parameters for applications involving normal stresses outside the range of the stresses covered by the test series. The large -displacement (LD) shear strength was <br />calculated using the shear force measured at the end of the test <br />DATE OF TEST: <br />22 to 25 July 2003 <br />FIGURE NO. <br />A-1 <br />PROJECT NO. <br />SGI3064 <br />DOCUMENT NO. <br />SGIO3094 <br />FILE NO <br />