4.1.1. Dry Unit Weight Calculation

Try these first

1. 1.

   What is the formula for calculating dry unit weight?

   Hint

   Refer back to the lesson notes.

2. 2.

   If the moisture content is 10%, what is its decimal form?

   Hint

   Remember to divide by 100.

3. 3.

   What is the relationship between moisture content and dry unit weight?

   • A decreases with higher moisture content
   • B increases with higher moisture content
   • C remains unchanged

   Hint

   Think about how water impacts soil structure.

4. 4.

   True or False: The dry unit weight can be higher than the saturated unit weight.

   • True
   • False

   Hint

   Consider what saturation means.

5. 5.

   A soil sample has a void ratio of 0.4 and receives water to reach saturation. If the specific gravity is 2.7 and the initial dry density is 1600 kg/m³, what is the final saturated unit weight?

   Hint

   Remember your moisture content calculations!

6. 6.

   Develop a scenario where soil fails to perform due to improper moisture levels. Describe how you'd calculate the needed adjustments.

   Hint

   Use historical data on the site moisture fluctuations!