Answer Happy

Question 3: Soil Compaction Standard compaction tests were performed on a brown-grey clayey-silt (Gs = 2.76). Details and results for the tests are recorded in table 1. You are required to: a) Fill in the blanks of the table for test No. 5. b) Plot dry density against moisture content w on the blank engineering paper. Clearly label with numeric values the maximum dry density and optimum moisture content. G₂ (1-A) c) Plot the zero air voids curve on the same paper. (Ya = ,A - air content) 1+ WG, TEST 1 TEST 2 TEST 3 TEST 5 DENSITY Mass sample + Mold (g) 271.9 280.5 280.3 275.7 Mass Mold (g) 140.9 140.9 140.9 140.9 Mass Sample (g) 131.0 139.6 139.4 2.100 2.238 2.235 1.909 1.998 1.987 Moist density y (g/cm³) Dry density ya (g/cm³) MOISTURE CONTENT Mass Cont. + Wet Soil (g) Mass Cont. + Dry Soil (g) Mass Water (g) 163.5 172.5 172.4 166.7 151.6 157.6 157.0 149.8 11.9 14.9 15.4 Mass Container (g) 33.1 33.9 33.6 33.3 Mass Dry Soil (g) 118.5 123.7 123.4 Moisture Content w (%) 10.0 12.0 12.5 Table 1 Data Sheet for the Compaction Test in Question 3 TEST 4 276.7 140.9 135.8 2.177 1.909 167.3 150.7 16.6 32.4 118.3 14.0