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Question 2 A foundation is proposed, which will be placed on to a 4 m thick stratum of homogeneous saturated clay. A 24.5 mm thick sample taken from the stratum, was subjected to a standard one-dimensional consolidation test and the following results were obtained: Pressure Sample thickness (kPa) after consolidation (mm) 0 24.50 50 24.12 100 23.91 200 23.65 400 23.40 800 23.18 Unloading: 0 23.71 At the end of the test the specific gravity of the soil particles was established as 2.66. A sample of the clay was then tested for water content and the following results obtained: Mass of sample tin + wet soil = 256.13 g Mass of sample tin + dry soil = 217.60 g Mass of sample tin = 39.65 g a) Plot the void ratio against pressure curve and, from it, determine the coefficient of compressibility of the clay for a pressure increment of 300 to 450 kPa.