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Knight Piesold Geotechnical Lab. <br />DIRECT SHEAR TEST 8/8/2016 <br />Date:8/4/16 <br />Client:Newfields <br />Project:East Cresson Overburden Storage Area (ECOSA) <br />Project No.:DV108-305/05 <br />Location:Colluvium (Bulk Sample) <br />Description:silty gravel with sand <br />Remarks:Failure chosen at peak shear stress and C=0. Test was inundated. Gap =0.4". Particles larger than <br />3/4" were removed prior to test. Area correction applied per client request. <br />Type of Sample:Tamped with nominal effort <br />Assumed Specific Gravity=2.7 LL=21 PL=18 PI=3 <br />Parameters for Specimen No. 1 <br /> Specimen Parameter Initial Consolidated Final <br />Moisture content: Moist soil+tare, gms.7426.500 8279.000 <br />Moisture content: Dry soil+tare, gms.7196.200 7196.200 <br />Moisture content: Tare, gms. 0.000 0.000 <br />Moisture, %3.2 15.0 15.0 <br />Moist specimen weight, gms.7426.0 <br />Side Length, in. 8.00 8.00 <br />Area, in.²64.00 64.00 <br />Height, in. 4.20 3.57 <br />Net decrease in height, in. 0.63 <br />Wet density, pcf 105.2 137.9 <br />Dry density, pcf 102.0 119.9 <br />Void ratio 0.6528 0.4063 <br />Saturation, %13.2 100.0 <br />Test Readings for Specimen No. 1 <br />Normal stress = 5000 psf <br />Strain rate, in./min. = 0.01 <br />Strength calculations use strain adjusted areas <br />Fail. Stress = 2345 psf at reading no. 53 <br />No. <br />Horizontal <br />Def. Dial <br />in. <br />Load <br />Dial <br />Load <br />lbs. <br />Strain <br />% <br />Shear <br />Stress <br />psf <br />0 -0.0020 6.000 0.0 0.0 0 <br />1 0.0090 191.000 185.0 0.1 417 <br />2 0.0170 252.000 246.0 0.2 555 <br />3 0.0260 300.000 294.0 0.3 664 <br />4 0.0360 340.000 334.0 0.5 755 <br />5 0.0450 376.000 370.0 0.6 837 <br />6 0.0510 403.000 397.0 0.7 899 <br />7 0.0600 436.000 430.0 0.8 975 <br />8 0.0670 460.000 454.0 0.9 1030 <br />9 0.0760 487.000 481.0 1.0 1093 <br />10 0.0840 515.000 509.0 1.1 1158 <br />11 0.1020 562.000 556.0 1.3 1267 <br />12 0.1170 602.000 596.0 1.5 1361 <br />13 0.1330 637.000 631.0 1.7 1444