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Geotechnical-Practice-for-Waste-Disposal-texas 6

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Tham khảo tài liệu 'geotechnical-practice-for-waste-disposal-texas 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CE 5327 GEOTECH PRACTICE FOR WASTE DISPOSAL Homework Assignment No.6 Due March 11 2005 1. The following table summarizes the data obtained from a compaction test. Diameter of mold 10.07 cm Height of mold 11.54 cm Mass of mold 4258 g Mass of Mass of can and Mass of can an d dry Mass of can soil and wet soil g soil g g mold g 6070 98.03 94.65 46.67 95.13 91.56 45.67 105.80 101.67 45.61 6174 88.29 84.76 46.69 72.27 70.07 45.67 79.00 76.08 45.61 6240 73.22 70.29 46.69 77.32 73.73 45.67 81.84 77.84 45.61 6248 62.62 60.46 46.69 75.95 71.64 45.67 62.68 60.33 45.61 6232 90.35 83.68 46.69 82.73 77.09 45.67 86.33 80.34 45.61 a Plot the dry density-water content curve for the above soil and determine the maximum Proctor dry density and optimum water content for the soil. b Start from basic definitions and demonstrate that the equation for the ZAV zero air voids curve is G Yw Y d s Y w dry 1 wGs If it is known that Gs 2.72 then plot the ZAV line on the same moisture-density diagram. c Using the guidelines provided in the TCEQ TNRCC Liner Handbook determine the acceptable zone for compaction water content-dry density combinations. Label the boundaries clearly. Show any calculations that you perform 2. The following question is based on the ASTM D-5084 Hydraulic Conductivity Measurement Using Flexible Wall Permeameter. a The following data was obtained for a sample of compacted clay prepared for hydraulic conductivity testing molding water content 21 total density after compaction 2.046 g cm3 specific gravity of soil mineral Gs 2.70. Determine the degree of saturation of the sample. Assume that density of water room temperature is 1.00 g cm3. b Using the information available in ASTM D-5084 determine the back pressure that needs to be applied to the clay specimen to achieve 100 saturation. c The expression used for determining hydraulic conductivity from flexible wall permeameter falling head Method B -constant tailwater elevation is as follows k ỌLln At f k Ì I h2 J where k .