Following is the result of standard compaction test on a soilWatercontent (%)13.5 20.2 25.0 35.0 41.5Bulk unitweight(kN/m3)16.3 19.4 18.8 18.0 17.2Plot the dry unit weight versus moisture content and obtain the maximum dry unitweight and optimum moisture content. Show 80% and 100% saturation lines on theplot. Take Gs = 2.65

To answer this question, we need to follow these steps:

Step 1: Create a table with the given data. The columns should be Water Content (%), Bulk Unit Weight (kN/m3), and Dry Unit Weight (kN/m3). The Dry Unit Weight can be calculated by dividing the Bulk Unit Weight by (1+Water Content/100).

Step 2: Plot the Dry Unit Weight versus the Water Content. The maximum point on this curve will give you the maximum dry unit weight and the corresponding water content is the optimum moisture content.

Step 3: To plot the 80% and 100% saturation lines, we need to calculate the saturation unit weight. This can be done using the formula Gs*unit weight of water/(1+water content/100). For 80% saturation, multiply the result by 0.8.

Step 4: Plot these saturation lines on the same graph.

Please note that this is a simplified explanation and the actual process may involve more detailed calculations and considerations. Also, the unit weight of water is typically taken as 9.81 kN/m3.