2.2.4. Types of Gradation

Try these first

1. 1.

   What is gradation in terms of soil?

   Hint

   Think about the size variations in soil particles.

2. 2.

   What type of soil has similar-sized particles?

   Hint

   Consider how this affects compaction.

3. 3.

   What type of gradation includes a wide range of particle sizes?

   • Well-Graded
   • Poorly-Graded
   • Gap-Graded

   Hint

   Recall the definition of well-graded soil.

4. 4.

   True or False: Poorly-graded soils are ideal for construction due to their compactability.

   • True
   • False

   Hint

   Think about the effects of having similar particle sizes.

5. 5.

   A sample of soil collected from a construction site shows a gradation curve that is continuous and covers a wide range of particle sizes. What type of gradation is this, and why is it beneficial for construction?

   Hint

   Consider how particle sizes interact with one another.

6. 6.

   You have a site where gap-graded soils are present. What construction techniques or treatments could you implement to compensate for potential drainage and stability issues?

   Hint

   Think about methods that can aid during construction and improve soil performance.