Q.3 (a) Standard Proctor tests were conducted on a soil sample obtained in a field and the results were recorded below:

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Q 3 A Standard Proctor Tests Were Conducted On A Soil Sample Obtained In A Field And The Results Were Recorded Below 1 (129.17 KiB) Viewed 91 times

Q.3 (a) Standard Proctor tests were conducted on a soil sample obtained in a field and the results were recorded below: Sample no. 1 2 3 4 5 Bulk density of soil sample (kg/m²) 1973 2076 2150 2138 2095 Moisture content (%) 8.30 9.30 10.70 11.80 12.80 (i) Determine the dry density of the soil sample and plot them against the moisture content; (6 marks) (ii) Determine the maximum dry density and the optimum moisture content; (2 marks) (iii) Determine and plot the dry density with zero air void (zero air void line) on the same graph. (4 marks) (b) After a site formation on a construction site, sand replacement tests were conducted on the backfilled materials and the results were recorded below: 2.6 kg Mass of wet soil removed from the hole Mass of the soil after being dried in an oven Mass of cylinder and standard sand (before filling the hole) Mass of cylinder and standard sand (after filling the hole) Volume of the standard sand cone Density of the standard sand 1.9 kg 5.9 kg 3.6 kg 0.00025 m 1500 kg/m3 Determine the moisture content, bulk density and dry density of the above soil sample. (9 marks)