4.2. Inter-Relations Examples

Try these first

1. 1.

   What is the void ratio if a soil has a volume of voids equal to 0.72 and the volume of solids is 1?

   Hint

   Recall the definition of void ratio.

2. 2.

   If the moisture content of a sample is 10%, how does it influence the moist unit weight?

   Hint

   Think about the weight of water added.

3. 3.

   What does the dry unit weight depend on?

   • Moisture content
   • Volume of voids
   • Both A and B

   Hint

   Think about the components affecting the weight.

4. 4.

   True or False: Moist unit weight is always greater than dry unit weight.

   • True
   • False

   Hint

   Remember what each weight includes.

5. 5.

   Calculate the total volume of water to add for complete saturation if a soil with a void ratio of 0.6 has a dry density of 1500 kg/m3.

   Hint

   Use relationships between volumes and densities.

6. 6.

   Given a soil sample with a bulk unit weight of 20 kN/m3 and a water content of 15%, find dry unit weight and moisture content based on provided relationships.

   Hint

   Think of the formula for moisture content's relationship with total weight.