(a) An oedometer test is performed on a specimen of clay. The sample diameter = 70 mm and the initial thickness = 19 mm.

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A An Oedometer Test Is Performed On A Specimen Of Clay The Sample Diameter 70 Mm And The Initial Thickness 19 Mm 1 (94.31 KiB) Viewed 22 times

(a) An oedometer test is performed on a specimen of clay. The sample diameter = 70 mm and the initial thickness = 19 mm. The dial gauge readings (after 24-hours) at various pressures are shown in Table Q3, while previous investigations have shown that the preconsolidation pressure (o) of the soil = 50 kPa. Table Q3 Pressure (kPa) 0 50 100 200 400 Dial gauge reading (mm) 19.000 18.110 17.180 16.251 15.321 Dry soil mass 102.62 g Initial wet soil mass 139.73 g Using the provided test data, determine the following: (i) the coefficient of volume compressibility (my) for the 4 individual load increments; (ii) the initial void ratio (eo), and final void ratio at 400 kPa (e₁); (iii) the compression index (Cc); (iv) the specific gravity (Gs). (10 marks)