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EXCAVATION METHODS BIAS TEST <br /> <br />TEST <br />No. <br /> <br />LOCATION <br />DEPTH <br />Ff. WET <br />DENSITY <br />LBICU. FT. AVG. WET <br />DENSITY <br />LB/CU. Fl'. ACTUAL <br />MOISTURE <br />% MOISTURE <br />LBJCU.FT. DRY <br />DENSITY <br />LB./CU.FT. <br /> <br />PROCTOR <br />lA BETWEEN DOZER TRACK 6 105.2 105.1 8.8 8.5 96.6 107.2°/a <br />1B do 6 105.0 <br />2A IN DOZER TRACK 6 106.6 106.7 8.7 8.5 98.2 109.0% <br />28 do 6 106.7 <br />3A BACKHOE TRENCH 6 106.7 106.8 10.4 10.1 96.7 107.4% <br />38 do 6 106.9 <br />5A BETWEEN DOZER TRACK 3 103.6 103.5 8.5 8.1 95.4 105.9% <br />5B do 3 103.4 <br />6A IN DOZER TRACK 3 104.2 104.2 8.8 8.4 95.8 106.3% <br />6B do 3 104.2 <br />7A IN SIDE WALL 3 105.4 105.0 9.4 9.1 95.9 106.5% <br />7B do 3 104.6 <br />NOTES: TEST 4, A large piece of wood was found under the meter <br />which invalidated the test <br />Proctor Number = 90.1 <br />FORMULAS: Moisture (pcij = (%Moisture X Wet Density) / (%Moisture + 100) <br />Dry Density =Wet Density - Moisture(pcf) <br />TABLE 1 <br />Average percent of proctor in dozer track 107.7°s <br />Average percent of proctor between dozer tracks 106.6% <br />Percent of proctor in sidewall 106.5% <br />It can be seen from the data that as compared to the sidewall test <br />that the "IN DOZER TRACK" measurement may impart a very small bias <br />to the high side, while the "BETWEEN DOZER TRACKS" measurement is <br />the same as the undisturbed sidewall, The backhoe trench also <br />shows a small high bias as compared to the sidewall. Taking <br />measurements in the backhoe pit were also difficult because of the <br />disturbance of the material caused by the bucket teeth. The <br />surface cut by the dozer blade between the tracks afforded the best <br />6. <br />