5.3.2. Grading Characteristics

Try these first

1. 1.

   What is a grading curve?

   Hint

   Think about visual graphs relating to sizes.

2. 2.

   What does D10 represent?

   Hint

   Focus on the percentage of soil particles.

3. 3.

   What does the effective size D10 measure?

   • The size where 10% of soil is smaller
   • The size where 50% of soil is smaller
   • The size of the largest particle

   Hint

   Think of how percentages relate to size.

4. 4.

   True or False: A high uniformity coefficient indicates poorly graded soil.

   • True
   • False

   Hint

   Reflect on what well-graded means versus poorly graded.

5. 5.

   A soil sample has D10 of 0.2 mm, D30 of 0.4 mm, and D60 of 0.6 mm. Calculate Cu and Cc.

   Hint

   Use the formulas for Cu and Cc directly.

6. 6.

   Design a practical scenario where soil grading impacts construction. Discuss the choices made.

   Hint

   Reflect on real-life construction challenges related to soil types.