1.5. Percentage Air Voids (n)

Try these first

1. 1.

   What is the void ratio if the volume of voids is 10 m³ and the volume of soil solids is 5 m³?

   Hint

   Use the formula e = Vv / Vs.

2. 2.

   If a soil has a total volume of 100 m³ and 40 m³ of voids, calculate the porosity.

   Hint

   Use the formula n = Vv / Vt * 100.

3. 3.

   What is the formula for calculating void ratio?

   • Va/Vs
   • Vv/Vs
   • Vw/Vs

   Hint

   Think about the definition of void ratio.

4. 4.

   True or False: Percent air voids increases as degree of saturation increases.

   • True
   • False

   Hint

   Consider what happens to voids when they are filled with water.

5. 5.

   Given a soil sample with a total volume of 100 m³, where the volume of voids is 30 m³, how does varying saturation level impact the air voids percentage?

   Hint

   Evaluate how the volume of water changes with saturation levels.

6. 6.

   A soil has a void ratio of 2.0 and this sample contains 25 m³ of solids. Calculate the total volume and then determine the total voids.

   Hint

   Revisit the void ratio definitions to facilitate calculations.