1.4. Air Content (a)

Try these first

1. 1.

   What is the formula for void ratio?

   Hint

   Think about the volumes involved.

2. 2.

   How do you express porosity?

   Hint

   Remember it's a percentage.

3. 3.

   What does 'void ratio' describe in soil mechanics?

   • Volume of air to volume of voids
   • Volume of voids to volume of solids
   • Volume of solids to total volume

   Hint

   Consider what spaces you're comparing.

4. 4.

   True or False: The degree of saturation can exceed 100%.

   • True
   • False

   Hint

   Think about saturation levels.

5. 5.

   A soil sample has a dry unit weight of 18 kN/m³ and specific gravity of soil solids as 2.65. Given the water content is 12%, calculate the void ratio.

   Hint

   Remember how specific gravity, water content, and dry unit weight interplay.

6. 6.

   In soil mechanics, if the void ratio is 0.6 and degree of saturation is 75%, what is the volume of water in 100 m³ of soil?

   Hint

   Relate S with the volume of voids and interpret through the ratios.