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 Due March 11 2005 1. The following table summarizes the data obtained from a compaction test. Diameter of mold cm Height of mold 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 6174 6240 6248 6232 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 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 g cm3 specific gravity of soil mineral Gs . Determine the degree of saturation of the sample. Assume that density of water room temperature is 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 .
