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GSE LINING TECHNOLOGY,-7NC. - SARASOTA LANDFILL <br />INTERFACE DIRECT SHEAR TESTING (ASTM D 6243) <br />Upper Shear Box: Concrete Sand <br />GSE UL double -sided geocomposite # 131244854 against <br />GSE 60 -mil black -black textured HDPE geomembrane # 105140560 against <br />Hydrated Bentofix NWL-45 GCL (no roll number) with non heat -burnished side up to geomembrane <br />Lower Shear Box: Concrete sand <br />15000 <br />Shear <br />Box Size <br />(in. x in.) <br />Normal <br />Stress <br />(psf) <br />— IA <br />12000 <br />— lB <br />GCL <br />w <br />(%) <br />_1C <br />C <br />Failure <br />Mode <br />y <br />° 9000 <br />12 x 12 <br />U <br />L <br />O <br />0.04 <br />L <br />d 6000 <br />- - <br />s <br />3000 <br />14.4 <br />0 4- <br />0.0 <br />0.8 1.6 2.4 3.2 <br />Displacement (in.) <br />25000 <br />20000 <br />c. <br />s 15000 <br />on <br />0 <br />Y <br />L <br />J <br />R 10000 <br />Z, <br />5000 <br />0 + <br />0 <br />Shear Strength S a i R2 <br />Parameters (deg) (psf) <br />Peak 24 630 1.000 <br />LD 12 415 0.999 <br />O Peak <br />0 LD <br />-- Linear (Peak) <br />---- Linear (LD) <br />5000 10000 15000 20000 25000 <br />Normal stress (psf) <br />Test <br />No. <br />Shear <br />Box Size <br />(in. x in.) <br />Normal <br />Stress <br />(psf) <br />Shear <br />Rate <br />(in./min) <br />GCL Soaking Consolidation Lower Soil <br />Stress Time Stress Time Yd Wi Wf <br />(psf) (hour) (pst) (hour) (pct (%) (%) <br />Upper Soil <br />Ya wi (nf <br />(pct) (°/a) (%) <br />GCL <br />w <br />(%) <br />" <br />(%) <br />Shear Strength <br />TP TLD <br />(psi) (psi) <br />Failure <br />Mode <br />IA <br />12 x 12 <br />5000 <br />0.04 <br />5000 72 - <br />- - <br />57.3 <br />14.4 <br />2894 1456 <br />2 <br />1B <br />12 x 12 <br />10000 <br />0.04 <br />10000 72 <br />- <br />45.3 <br />12.4 <br />5174 2606 <br />2 <br />1C <br />1 12 x 121 <br />20000 <br />0.04 <br />20000 72 - - <br />- <br />45.0 <br />13.4 <br />9699 4686 <br />2 <br />NOTES: <br />(1) Test specimens were not submerged in water during shearing. <br />(3) Sliding occurred at the interface between the geocomposite-geomembrane interface. <br />DATE OF REPORT: 11/13/2008 <br />FIGURE NO. C-1 <br />PROJECT NO. SG17032 <br />DOCUMENT NO. <br />ININW16 <br />S7032-27.ds.xls <br />