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Say 19, 5025 12 Street S <br />Ca~.gary, Alberta, T2H-2 <br />Telephonae 1-(403)-259- 240 <br />Facsimile: 1-(403)-259-0241 <br />FAZ TRANSlSITTAL <br />April 17, 1994 <br />Toy Dave ]fldd <br />Ref. No. 962-2503 <br />fax ao. 1 (303) 985-2080 <br />_Fr: Thanh Lam <br />RBA LARGE DIRECT SFIeAR TEST RESULTS <br />1~SSAGS t <br />Attached please find the area corrected stress-strain curves for the <br />large direct shear teat of the soil-geoaynthetfc interface system. <br />The interface system consisted of the following materials (from top to <br />bottom). <br />• iron clad tails <br />• 80 mil smooth VLDPE <br />• creaeon ore 1.5 in, minus <br />The low stress teat indicate a punk shear atreaa o! 8.6 psi under a <br />normal etreae of 16.1 psi at 0.8 inch displacement. Post peak <br />solteninq was rnpid followed by a rough residual shear sireaa. <br />The high stress teat did not reach a peak shear atreaa within the 2.0 <br />inch of displacement. Ths shear atreaa at the end of displacement was <br />23.5 psi under a normal stress of 35.9 psi. <br />In both cases, the shear failure cccured between the iron clad ta11a <br />and the smooth VLDPE: There were deep striations on the VLDPE but no <br />holes were found. <br />If you have any questions please contact me at (403) 259-0243. <br />Regnrde, <br />T1U11lMS'1T1D <br />D~q, <br />Slp. <br />Ptgpi <br />Yq~ 1 <br />IO'o I~0'oN 8I:£I tr6 LI ~dy SILT-£57,:31 Htll 2i3Q109 <br />